From: Abhisit Sangjan <s.abhisit@xxxxxxxxx> TI LMP92001 Analog System Monitor and Controller 8-bit GPIOs. 12 DACs with 12-bit resolution. The GPIOs and DACs are shared port function with Cy function pin to take control the pin suddenly from external hardware. DAC's referance voltage selectable for Internal/External. 16 + 1 ADCs with 12-bit resolution. Built-in internal Temperature Sensor on channel 17. Windows Comparator Function is supported on channel 1-3 and 9-11 for monitoring with interrupt signal (pending to implement for interrupt). ADC's referance voltage selectable for Internal/External. Signed-off-by: Abhisit Sangjan <s.abhisit@xxxxxxxxx> --- Documentation/ABI/testing/sysfs-bus-iio-lmp920001 | 92 ++++ .../devicetree/bindings/gpio/gpio-lmp92001.txt | 22 + .../bindings/iio/adc/ti-lmp92001-adc.txt | 21 + .../bindings/iio/dac/ti-lmp92001-dac.txt | 35 ++ drivers/gpio/Kconfig | 7 + drivers/gpio/Makefile | 1 + drivers/gpio/gpio-lmp92001.c | 209 +++++++++ drivers/iio/adc/Kconfig | 10 + drivers/iio/adc/Makefile | 1 + drivers/iio/adc/lmp92001-adc.c | 500 +++++++++++++++++++++ drivers/iio/dac/Kconfig | 9 + drivers/iio/dac/Makefile | 1 + drivers/iio/dac/lmp92001-dac.c | 390 ++++++++++++++++ drivers/mfd/Kconfig | 12 + drivers/mfd/Makefile | 4 + drivers/mfd/lmp92001-core.c | 308 +++++++++++++ drivers/mfd/lmp92001-debug.c | 67 +++ drivers/mfd/lmp92001-i2c.c | 215 +++++++++ include/linux/mfd/lmp92001/core.h | 119 +++++ include/linux/mfd/lmp92001/debug.h | 28 ++ 20 files changed, 2051 insertions(+) create mode 100644 Documentation/ABI/testing/sysfs-bus-iio-lmp920001 create mode 100644 Documentation/devicetree/bindings/gpio/gpio-lmp92001.txt create mode 100644 Documentation/devicetree/bindings/iio/adc/ti-lmp92001-adc.txt create mode 100644 Documentation/devicetree/bindings/iio/dac/ti-lmp92001-dac.txt create mode 100644 drivers/gpio/gpio-lmp92001.c create mode 100644 drivers/iio/adc/lmp92001-adc.c create mode 100644 drivers/iio/dac/lmp92001-dac.c create mode 100644 drivers/mfd/lmp92001-core.c create mode 100644 drivers/mfd/lmp92001-debug.c create mode 100644 drivers/mfd/lmp92001-i2c.c create mode 100644 include/linux/mfd/lmp92001/core.h create mode 100644 include/linux/mfd/lmp92001/debug.h diff --git a/Documentation/ABI/testing/sysfs-bus-iio-lmp920001 b/Documentation/ABI/testing/sysfs-bus-iio-lmp920001 new file mode 100644 index 0000000..bd4e733 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-bus-iio-lmp920001 @@ -0,0 +1,92 @@ +What: /sys/bus/iio/devices/iio:deviceX/gang +Date: August 2016 +KernelVersion: 4.1.15 +Contact: Abhisit Sangjan <s.abhisit@xxxxxxxxx> +Description: + Controls the association of analog output channels OUTx with + asynchronous control inputs Cy for DAC. + Can be either: + - "0" + - "1" + + Cy to OUTx Assignment + ---------------------------------- + | Cy | CDAC:GANG=0 | CDAC:GANG=1 | + ---------------------------------- + | C1 | OUT[1:4] | OUT[1:3] | + ---------------------------------- + | C2 | OUT[5:6] | OUT[4:6] | + ---------------------------------- + | C3 | OUT[7:8] | OUT[7:9] | + ---------------------------------- + | C4 | OUT[9:12] | OUT[10:12] | + ---------------------------------- + +What: /sys/bus/iio/devices/iio:deviceX/outx +Date: August 2016 +KernelVersion: 4.1.15 +Contact: Abhisit Sangjan <s.abhisit@xxxxxxxxx> +Description: + The pin output mode for DAC. + Can be either: + - "hiz" = High impedance state. + - "dac" = DAC output. + - "0" = Drive it to low. + - "1" = Drive it to high. + +What: /sys/bus/iio/devices/iio:deviceX/vref +Date: August 2016 +KernelVersion: 4.1.15 +Contact: Abhisit Sangjan <s.abhisit@xxxxxxxxx> +Description: + This is voltage referance source for DACs. + Can be either: + - "external" + - "internal" + +What: /sys/devices/socX/soc/XXXXXXX.aips-bus/XXXXXXX.i2c/i2c-X/X-00XX/lmp92001-adc.X.auto/iio:deviceX/en +Date: August 2016 +KernelVersion: 4.1.15 +Contact: Abhisit Sangjan <s.abhisit@xxxxxxxxx> +Description: + This is ADC Conversion Enable for each channel. + Can be either: + - "enable" + - "disable" + +What: /sys/devices/socX/soc/XXXXXXX.aips-bus/XXXXXXX.i2c/i2c-X/X-00XX/lmp92001-adc.X.auto/iio:deviceX/mode +Date: August 2016 +KernelVersion: 4.1.15 +Contact: Abhisit Sangjan <s.abhisit@xxxxxxxxx> +Description: + This is conversion mode for all of ADCs. + Can be either: + - "continuous" = Continuously conversion all the time. + - "single-shot" = Once time conversion and stop. + +What: /sys/devices/socX/soc/XXXXXXX.aips-bus/XXXXXXX.i2c/i2c-X/X-00XX/lmp92001-adc.X.auto/iio:deviceX/vref +Date: August 2016 +KernelVersion: 4.1.15 +Contact: Abhisit Sangjan <s.abhisit@xxxxxxxxx> +Description: + This is voltage referance source for ADCs. + Can be either: + - "external" + - "internal" + +What: /sys/devices/socX/soc/XXXXXXX.aips-bus/XXXXXXX.i2c/i2c-X/X-00XX/lmp92001-adc.X.auto/iio:deviceX/events/in_voltageX_thresh_{falling|rising}_en +Date: August 2016 +KernelVersion: 4.1.15 +Contact: Abhisit Sangjan <s.abhisit@xxxxxxxxx> +Description: + This is ADC's Windows Comparator Function enable for falling and rising. + Supported channels are 1-3 and 9-11. + +What: /sys/devices/socX/soc/XXXXXXX.aips-bus/XXXXXXX.i2c/i2c-X/X-00XX/lmp92001-adc.X.auto/iio:deviceX/events/in_voltageX_thresh_{falling|rising}_value +Date: August 2016 +KernelVersion: 4.1.15 +Contact: Abhisit Sangjan <s.abhisit@xxxxxxxxx> +Description: + This is ADC's Windows Comparator Function value for falling and rising. + Supported channels are 1-3 and 9-11. + The possible range is 0 - 2047. diff --git a/Documentation/devicetree/bindings/gpio/gpio-lmp92001.txt b/Documentation/devicetree/bindings/gpio/gpio-lmp92001.txt new file mode 100644 index 0000000..c68784e --- /dev/null +++ b/Documentation/devicetree/bindings/gpio/gpio-lmp92001.txt @@ -0,0 +1,22 @@ +* Texas Instruments' LMP92001 GPIOs + +Required properties: + - compatible: Must be set to "ti,lmp92001-gpio". + - reg: i2c chip address for the device. + - gpio-controller: Marks the device node as a gpio controller. + - #gpio-cells : Should be two. The first cell is the pin number and the + second cell is used to specify the gpio polarity: + 0 = Active high + 1 = Active low + +Example: +lmp92001@20 { + compatible = "ti,lmp92001"; + reg = <0x20>; + + lmp92001_gpio: lmp92001-gpio { + compatible = "ti,lmp92001-gpio"; + gpio-controller; + #gpio-cells = <2>; + }; +}; diff --git a/Documentation/devicetree/bindings/iio/adc/ti-lmp92001-adc.txt b/Documentation/devicetree/bindings/iio/adc/ti-lmp92001-adc.txt new file mode 100644 index 0000000..34d7809 --- /dev/null +++ b/Documentation/devicetree/bindings/iio/adc/ti-lmp92001-adc.txt @@ -0,0 +1,21 @@ +* Texas Instruments' LMP92001 ADCs + +Required properties: + - compatible: Must be set to "ti,lmp92001-adc". + - reg: i2c chip address for the device. + - ti,lmp92001-adc-mode: adc operation, either continuous or single-shot. + - ti,lmp92001-adc-mask: bit mask for which channel is enable. + 0 = Off + 1 = On + +Example: +lmp92001@20 { + compatible = "ti,lmp92001"; + reg = <0x20>; + + lmp92001-adc { + compatible = "ti,lmp92001-adc"; + ti,lmp92001-adc-mode = "continuous"; + ti,lmp92001-adc-mask = <0x00000079>; + }; +}; \ No newline at end of file diff --git a/Documentation/devicetree/bindings/iio/dac/ti-lmp92001-dac.txt b/Documentation/devicetree/bindings/iio/dac/ti-lmp92001-dac.txt new file mode 100644 index 0000000..882db9c --- /dev/null +++ b/Documentation/devicetree/bindings/iio/dac/ti-lmp92001-dac.txt @@ -0,0 +1,35 @@ +* Texas Instruments' LMP92001 DACs + +Required properties: + - compatible: Must be set to "ti,lmp92001-dac". + - reg: i2c chip address for the device. + - ti,lmp92001-dac-hiz: hi-impedance control, + 1 = Forces all OUT[1:12] outputs to hi-z, 0 = normal + - ti,lmp92001-dac-outx: + Cy = 0, 1 = will force associated OUTx outputs to VDD + Cy = 0, 0 = will force associated OUTx outputs to GND + - ti,lmp92001-dac-gang: What group of Cy is governed to. + ----------------------------------------- + | Cy | CDAC:GANG = 0 | CDAC:GANG = 1 | + ----------------------------------------- + | C1 | OUT[1:4] | OUT[1:3] | + ----------------------------------------- + | C2 | OUT[5:6] | OUT[4:6] | + ----------------------------------------- + | C3 | OUT[7:8] | OUT[7:9] | + ----------------------------------------- + | C4 | OUT[9:12] | OUT[10:12] | + ----------------------------------------- + +Example: +lmp92001@20 { + compatible = "ti,lmp92001"; + reg = <0x20>; + + lmp92001-dac { + compatible = "ti,lmp92001-dac"; + ti,lmp92001-dac-hiz = /bits/ 8 <0>; + ti,lmp92001-dac-outx = /bits/ 8 <0>; + ti,lmp92001-dac-gang = /bits/ 8 <0>; + }; +}; diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig index 461d6fc..5962ea0 100644 --- a/drivers/gpio/Kconfig +++ b/drivers/gpio/Kconfig @@ -948,6 +948,13 @@ config GPIO_KEMPLD This driver can also be built as a module. If so, the module will be called gpio-kempld. +config GPIO_LMP92001 + tristate "LMP92001 GPIOs" + depends on MFD_LMP92001 + help + Say yes here to access the GPIO signals of TI LMP92001 Analog System + Monitor and Controller. + config GPIO_LP3943 tristate "TI/National Semiconductor LP3943 GPIO expander" depends on MFD_LP3943 diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile index a9fda6c..560d59c 100644 --- a/drivers/gpio/Makefile +++ b/drivers/gpio/Makefile @@ -62,6 +62,7 @@ obj-$(CONFIG_GPIO_JANZ_TTL) += gpio-janz-ttl.o obj-$(CONFIG_GPIO_KEMPLD) += gpio-kempld.o obj-$(CONFIG_ARCH_KS8695) += gpio-ks8695.o obj-$(CONFIG_GPIO_INTEL_MID) += gpio-intel-mid.o +obj-$(CONFIG_GPIO_LMP92001) += gpio-lmp92001.o obj-$(CONFIG_GPIO_LOONGSON) += gpio-loongson.o obj-$(CONFIG_GPIO_LP3943) += gpio-lp3943.o obj-$(CONFIG_GPIO_LPC18XX) += gpio-lpc18xx.o diff --git a/drivers/gpio/gpio-lmp92001.c b/drivers/gpio/gpio-lmp92001.c new file mode 100644 index 0000000..b80ba4e --- /dev/null +++ b/drivers/gpio/gpio-lmp92001.c @@ -0,0 +1,209 @@ +/* + * gpio-lmp92001.c - Support for TI LMP92001 GPIOs + * + * Copyright 2016-2017 Celestica Ltd. + * + * Author: Abhisit Sangjan <s.abhisit@xxxxxxxxx> + * + * Inspired by wm831x driver. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + */ + +#include <linux/bitops.h> +#include <linux/gpio/driver.h> +#include <linux/kernel.h> +#include <linux/module.h> + +#include <linux/mfd/lmp92001/core.h> + +#define SGEN_GPI (1 << 0) /* 1 - if any bit in SGPI is set. */ + +struct lmp92001_gpio { + struct lmp92001 *lmp92001; + struct gpio_chip gpio_chip; +}; + +static int lmp92001_gpio_get_direction(struct gpio_chip *chip, unsigned offset) +{ + struct lmp92001_gpio *lmp92001_gpio = gpiochip_get_data(chip); + struct lmp92001 *lmp92001 = lmp92001_gpio->lmp92001; + unsigned int val; + int ret; + + ret = regmap_read(lmp92001->regmap, LMP92001_CGPO, &val); + if (ret < 0) + return ret; + + return (val >> offset) & BIT(0); +} + +static int lmp92001_gpio_direction_in(struct gpio_chip *chip, unsigned offset) +{ + struct lmp92001_gpio *lmp92001_gpio = gpiochip_get_data(chip); + struct lmp92001 *lmp92001 = lmp92001_gpio->lmp92001; + + return regmap_update_bits(lmp92001->regmap, LMP92001_CGPO, BIT(offset), + BIT(offset)); +} + +static int lmp92001_gpio_get(struct gpio_chip *chip, unsigned offset) +{ + struct lmp92001_gpio *lmp92001_gpio = gpiochip_get_data(chip); + struct lmp92001 *lmp92001 = lmp92001_gpio->lmp92001; + unsigned int val, sgen; + + /* + * Does the GPIO input mode? + * Does the GPIO was set? + * Reading indicated logic level. + * Clear indicated logic level. + */ + regmap_read(lmp92001->regmap, LMP92001_CGPO, &val); + if ((val >> offset) & BIT(0)) { + regmap_read(lmp92001->regmap, LMP92001_SGEN, &sgen); + if (sgen & SGEN_GPI) { + regmap_read(lmp92001->regmap, LMP92001_SGPI, &val); + regmap_update_bits(lmp92001->regmap, LMP92001_CGPO, + 0xFF, val); + } + } + + return !!(val & BIT(offset)); +} + +static int lmp92001_gpio_direction_out(struct gpio_chip *chip, unsigned offset, + int value) +{ + struct lmp92001_gpio *lmp92001_gpio = gpiochip_get_data(chip); + struct lmp92001 *lmp92001 = lmp92001_gpio->lmp92001; + + return regmap_update_bits(lmp92001->regmap, LMP92001_CGPO, BIT(offset), + 0 << offset); +} + +static void lmp92001_gpio_set(struct gpio_chip *chip, unsigned offset, + int value) +{ + struct lmp92001_gpio *lmp92001_gpio = gpiochip_get_data(chip); + struct lmp92001 *lmp92001 = lmp92001_gpio->lmp92001; + + regmap_update_bits(lmp92001->regmap, LMP92001_CGPO, BIT(offset), + value << offset); +} + +#ifdef CONFIG_DEBUG_FS +static void lmp92001_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip) +{ + struct lmp92001_gpio *lmp92001_gpio = gpiochip_get_data(chip); + struct lmp92001 *lmp92001 = lmp92001_gpio->lmp92001; + int i, gpio; + unsigned int cgpo; + const char *label, *dir, *logic; + + for (i = 0; i < chip->ngpio; i++) { + gpio = i + chip->base; + + label = gpiochip_is_requested(chip, i); + if (!label) + continue; + + regmap_read(lmp92001->regmap, LMP92001_CGPO, &cgpo); + if ((cgpo>>i) & BIT(0)) + dir = "in"; + else + dir = "out"; + + if (lmp92001_gpio_get(chip, i)) + logic = "hi"; + else + logic = "lo"; + + seq_printf(s, " gpio-%-3d (%-20.20s) %-3.3s %-2.2s\n", + gpio, label, dir, logic); + } +} +#else +#define lmp92001_gpio_dbg_show NULL +#endif + +static struct gpio_chip lmp92001_gpio_chip = { + .label = "lmp92001", + .owner = THIS_MODULE, + .get_direction = lmp92001_gpio_get_direction, + .direction_input = lmp92001_gpio_direction_in, + .get = lmp92001_gpio_get, + .direction_output = lmp92001_gpio_direction_out, + .set = lmp92001_gpio_set, + .dbg_show = lmp92001_gpio_dbg_show, +}; + +static int lmp92001_gpio_probe(struct platform_device *pdev) +{ + struct lmp92001 *lmp92001 = dev_get_drvdata(pdev->dev.parent); + struct lmp92001_gpio *lmp92001_gpio; + int ret; + + lmp92001_gpio = devm_kzalloc(&pdev->dev, sizeof(*lmp92001_gpio), + GFP_KERNEL); + if (!lmp92001_gpio) + return -ENOMEM; + + lmp92001_gpio->lmp92001 = lmp92001; + lmp92001_gpio->gpio_chip = lmp92001_gpio_chip; + lmp92001_gpio->gpio_chip.ngpio = 8; + lmp92001_gpio->gpio_chip.parent = &pdev->dev; + lmp92001_gpio->gpio_chip.base = -1; + + ret = devm_gpiochip_add_data(&pdev->dev, &lmp92001_gpio->gpio_chip, + lmp92001_gpio); + if (ret < 0) { + dev_err(&pdev->dev, "could not register gpiochip, %d\n", ret); + return ret; + } + + platform_set_drvdata(pdev, lmp92001_gpio); + + return ret; +} + +static int lmp92001_gpio_remove(struct platform_device *pdev) +{ + struct lmp92001_gpio *lmp92001_gpio = platform_get_drvdata(pdev); + + devm_gpiochip_remove(&pdev->dev, &lmp92001_gpio->gpio_chip); + + return 0; +} + +static struct platform_driver lmp92001_gpio_driver = { + .driver.name = "lmp92001-gpio", + .probe = lmp92001_gpio_probe, + .remove = lmp92001_gpio_remove, +}; + +static int __init lmp92001_gpio_init(void) +{ + return platform_driver_register(&lmp92001_gpio_driver); +} +subsys_initcall(lmp92001_gpio_init); + +static void __exit lmp92001_gpio_exit(void) +{ + platform_driver_unregister(&lmp92001_gpio_driver); +} +module_exit(lmp92001_gpio_exit); + +MODULE_AUTHOR("Abhisit Sangjan <s.abhisit@xxxxxxxxx>"); +MODULE_DESCRIPTION("GPIO interface for TI LMP92001"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:lmp92001-gpio"); diff --git a/drivers/iio/adc/Kconfig b/drivers/iio/adc/Kconfig index 614fa41..2adeba5 100644 --- a/drivers/iio/adc/Kconfig +++ b/drivers/iio/adc/Kconfig @@ -331,6 +331,16 @@ config IMX7D_ADC This driver can also be built as a module. If so, the module will be called imx7d_adc. +config LMP92001_ADC + tristate "TI LMP92001 ADC Driver" + depends on MFD_LMP92001 + help + If you say yes here you get support for TI LMP92001 ADCs + conversion. + + This driver can also be built as a module. If so, the module will + be called lmp92001_adc. + config LP8788_ADC tristate "LP8788 ADC driver" depends on MFD_LP8788 diff --git a/drivers/iio/adc/Makefile b/drivers/iio/adc/Makefile index b546736a..2ed8986 100644 --- a/drivers/iio/adc/Makefile +++ b/drivers/iio/adc/Makefile @@ -31,6 +31,7 @@ obj-$(CONFIG_HI8435) += hi8435.o obj-$(CONFIG_HX711) += hx711.o obj-$(CONFIG_IMX7D_ADC) += imx7d_adc.o obj-$(CONFIG_INA2XX_ADC) += ina2xx-adc.o +obj-$(CONFIG_LMP92001_ADC) += lmp92001-adc.o obj-$(CONFIG_LP8788_ADC) += lp8788_adc.o obj-$(CONFIG_LPC18XX_ADC) += lpc18xx_adc.o obj-$(CONFIG_LPC32XX_ADC) += lpc32xx_adc.o diff --git a/drivers/iio/adc/lmp92001-adc.c b/drivers/iio/adc/lmp92001-adc.c new file mode 100644 index 0000000..8e64b51 --- /dev/null +++ b/drivers/iio/adc/lmp92001-adc.c @@ -0,0 +1,500 @@ +/* + * lmp92001-adc.c - Support for TI LMP92001 ADCs + * + * Copyright 2016-2017 Celestica Ltd. + * + * Author: Abhisit Sangjan <s.abhisit@xxxxxxxxx> + * + * Inspired by wm831x and ad5064 drivers. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + */ + +#include <linux/iio/iio.h> +#include <linux/interrupt.h> +#include <linux/kernel.h> +#include <linux/mfd/core.h> +#include <linux/module.h> +#include <linux/platform_device.h> + +#include <linux/mfd/lmp92001/core.h> + +#define CGEN_STRT (1 << 0) /* Is continuous conversion all of ADCs? */ +#define CGEN_LCK (1 << 1) /* Is lock the HW register? */ +#define CGEN_RST (1 << 7) /* Reset all registers. */ + +#define CREF_AEXT (1 << 1) /* 1 - ADC external reference. + * 0 - ADC internal reference. + */ + +static int lmp92001_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *channel, + int *val, int *val2, + long mask) +{ + struct lmp92001 *lmp92001 = iio_device_get_drvdata(indio_dev); + unsigned int code, cgen, sgen, try; + int ret; + + mutex_lock(&lmp92001->adc_lock); + + ret = regmap_read(lmp92001->regmap, LMP92001_CGEN, &cgen); + if (ret < 0) + goto exit; + + /* + * Is not continuous conversion? + * Lock the HW registers (if needed). + * Triggering single-short conversion. + * Waiting for conversion successfully. + */ + if (!(cgen & CGEN_STRT)) { + if (!(cgen & CGEN_LCK)) { + ret = regmap_update_bits(lmp92001->regmap, + LMP92001_CGEN, CGEN_LCK, CGEN_LCK); + if (ret < 0) + goto exit; + } + + /* Writing any value to triggered Single-Shot conversion. */ + ret = regmap_write(lmp92001->regmap, LMP92001_CTRIG, 1); + if (ret < 0) + goto exit; + + /* In case of conversion is in-progress, repeat for 10 times. */ + try = 10; + do { + ret = regmap_read(lmp92001->regmap, + LMP92001_SGEN, &sgen); + if (ret < 0) + goto exit; + } while ((sgen & CGEN_RST) && (--try > 0)); + + if (!try) { + ret = -ETIME; + goto exit; + } + } + + ret = regmap_read(lmp92001->regmap, 0x1F + channel->channel, &code); + if (ret < 0) + goto exit; + + switch (mask) { + case IIO_CHAN_INFO_RAW: + switch (channel->type) { + case IIO_VOLTAGE: + case IIO_TEMP: + *val = code; + ret = IIO_VAL_INT; + goto exit; + default: + break; + } + break; + default: + break; + } + + /* In case of no match channel info/type is return here. */ + ret = -EINVAL; + +exit: + mutex_unlock(&lmp92001->adc_lock); + + return ret; +} + +static const struct iio_info lmp92001_info = { + .read_raw = lmp92001_read_raw, + .driver_module = THIS_MODULE, +}; + +static ssize_t lmp92001_avref_read(struct iio_dev *indio_dev, + uintptr_t private, struct iio_chan_spec const *channel, char *buf) +{ + struct lmp92001 *lmp92001 = iio_device_get_drvdata(indio_dev); + unsigned int cref; + int ret; + + ret = regmap_read(lmp92001->regmap, LMP92001_CREF, &cref); + if (ret < 0) + return ret; + + return sprintf(buf, "%s\n", cref & CREF_AEXT ? "external" : "internal"); +} + +static ssize_t lmp92001_avref_write(struct iio_dev *indio_dev, + uintptr_t private, struct iio_chan_spec const *channel, + const char *buf, size_t len) +{ + struct lmp92001 *lmp92001 = iio_device_get_drvdata(indio_dev); + unsigned int cref; + int ret; + + if (strncmp("external", buf, 8) == 0) + cref = 2; + else if (strncmp("internal", buf, 8) == 0) + cref = 0; + else + return -EINVAL; + + ret = regmap_update_bits(lmp92001->regmap, LMP92001_CREF, CREF_AEXT, + cref); + if (ret < 0) + return ret; + + return len; +} + +static ssize_t lmp92001_enable_read(struct iio_dev *indio_dev, + uintptr_t private, struct iio_chan_spec const *channel, char *buf) +{ + struct lmp92001 *lmp92001 = iio_device_get_drvdata(indio_dev); + unsigned int reg, cad; + int ret; + + switch (channel->channel) { + case 1 ... 8: + reg = LMP92001_CAD1; + break; + case 9 ... 16: + reg = LMP92001_CAD2; + break; + case 17: + reg = LMP92001_CAD3; + break; + default: + return -EINVAL; + } + + ret = regmap_read(lmp92001->regmap, reg, &cad); + if (ret < 0) + return ret; + + if (channel->channel <= 8) + cad >>= channel->channel - 1; + else if (channel->channel > 8) + cad >>= channel->channel - 9; + else if (channel->channel > 16) + cad >>= channel->channel - 17; + else + return -EINVAL; + + return sprintf(buf, "%s\n", cad & BIT(0) ? "enable" : "disable"); +} + +static ssize_t lmp92001_enable_write(struct iio_dev *indio_dev, + uintptr_t private, struct iio_chan_spec const *channel, + const char *buf, size_t len) +{ + struct lmp92001 *lmp92001 = iio_device_get_drvdata(indio_dev); + unsigned int reg, enable, shif, mask; + int ret; + + switch (channel->channel) { + case 1 ... 8: + reg = LMP92001_CAD1; + shif = (channel->channel - 1); + break; + case 9 ... 16: + reg = LMP92001_CAD2; + shif = (channel->channel - 9); + break; + case 17: + reg = LMP92001_CAD3; + shif = (channel->channel - 17); + break; + default: + return -EINVAL; + } + + if (strncmp("enable", buf, 6) == 0) + enable = 1; + else if (strncmp("disable", buf, 7) == 0) + enable = 0; + else + return -EINVAL; + + enable <<= shif; + mask = 1 << shif; + + ret = regmap_update_bits(lmp92001->regmap, reg, mask, enable); + if (ret < 0) + return ret; + + return len; +} + +static ssize_t lmp92001_mode_read(struct iio_dev *indio_dev, + uintptr_t private, struct iio_chan_spec const *channel, char *buf) +{ + struct lmp92001 *lmp92001 = iio_device_get_drvdata(indio_dev); + unsigned int cgen; + int ret; + + ret = regmap_read(lmp92001->regmap, LMP92001_CGEN, &cgen); + if (ret < 0) + return ret; + + return sprintf(buf, "%s\n", + cgen & BIT(0) ? "continuous" : "single-shot"); +} + +static ssize_t lmp92001_mode_write(struct iio_dev *indio_dev, + uintptr_t private, struct iio_chan_spec const *channel, + const char *buf, size_t len) +{ + struct lmp92001 *lmp92001 = iio_device_get_drvdata(indio_dev); + unsigned int cgen; + int ret; + + if (strncmp("continuous", buf, 10) == 0) + cgen = 1; + else if (strncmp("single-shot", buf, 11) == 0) + cgen = 0; + else + return -EINVAL; + + /* + * Unlock the HW registers. + * Set conversion mode. + * Lock the HW registers. + */ + ret = regmap_update_bits(lmp92001->regmap, LMP92001_CGEN, CGEN_LCK, 0); + if (ret < 0) + return ret; + + ret = regmap_update_bits(lmp92001->regmap, LMP92001_CGEN, CGEN_STRT, + cgen); + if (ret < 0) + return ret; + + ret = regmap_update_bits(lmp92001->regmap, LMP92001_CGEN, CGEN_LCK, + CGEN_LCK); + if (ret < 0) + return ret; + + return len; +} + +static const struct iio_chan_spec_ext_info lmp92001_ext_info[] = { + { + .name = "vref", + .read = lmp92001_avref_read, + .write = lmp92001_avref_write, + .shared = IIO_SHARED_BY_ALL, + }, + { + .name = "en", + .read = lmp92001_enable_read, + .write = lmp92001_enable_write, + .shared = IIO_SEPARATE, + }, + { + .name = "mode", + .read = lmp92001_mode_read, + .write = lmp92001_mode_write, + .shared = IIO_SHARED_BY_ALL, + }, + { }, +}; + +static const struct iio_event_spec lmp92001_events[] = { + { + .type = IIO_EV_TYPE_THRESH, + .dir = IIO_EV_DIR_RISING, + .mask_separate = BIT(IIO_EV_INFO_ENABLE) | + BIT(IIO_EV_INFO_VALUE), + }, + { + .type = IIO_EV_TYPE_THRESH, + .dir = IIO_EV_DIR_FALLING, + .mask_separate = BIT(IIO_EV_INFO_ENABLE) | + BIT(IIO_EV_INFO_VALUE), + }, + { }, +}; + +#define LMP92001_CHAN_SPEC(_ch, _type, _event, _nevent) \ +{ \ + .channel = _ch, \ + .type = _type, \ + .indexed = 1, \ + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ + .event_spec = _event, \ + .num_event_specs = _nevent, \ + .ext_info = lmp92001_ext_info, \ +} + +static const struct iio_chan_spec lmp92001_adc_channels[] = { + LMP92001_CHAN_SPEC(1, IIO_VOLTAGE, lmp92001_events, + ARRAY_SIZE(lmp92001_events)), + LMP92001_CHAN_SPEC(2, IIO_VOLTAGE, lmp92001_events, + ARRAY_SIZE(lmp92001_events)), + LMP92001_CHAN_SPEC(3, IIO_VOLTAGE, lmp92001_events, + ARRAY_SIZE(lmp92001_events)), + LMP92001_CHAN_SPEC(4, IIO_VOLTAGE, NULL, 0), + LMP92001_CHAN_SPEC(5, IIO_VOLTAGE, NULL, 0), + LMP92001_CHAN_SPEC(6, IIO_VOLTAGE, NULL, 0), + LMP92001_CHAN_SPEC(7, IIO_VOLTAGE, NULL, 0), + LMP92001_CHAN_SPEC(8, IIO_VOLTAGE, NULL, 0), + LMP92001_CHAN_SPEC(9, IIO_VOLTAGE, lmp92001_events, + ARRAY_SIZE(lmp92001_events)), + LMP92001_CHAN_SPEC(10, IIO_VOLTAGE, lmp92001_events, + ARRAY_SIZE(lmp92001_events)), + LMP92001_CHAN_SPEC(11, IIO_VOLTAGE, lmp92001_events, + ARRAY_SIZE(lmp92001_events)), + LMP92001_CHAN_SPEC(12, IIO_VOLTAGE, NULL, 0), + LMP92001_CHAN_SPEC(13, IIO_VOLTAGE, NULL, 0), + LMP92001_CHAN_SPEC(14, IIO_VOLTAGE, NULL, 0), + LMP92001_CHAN_SPEC(15, IIO_VOLTAGE, NULL, 0), + LMP92001_CHAN_SPEC(16, IIO_VOLTAGE, NULL, 0), + LMP92001_CHAN_SPEC(17, IIO_TEMP, NULL, 0), +}; + +static int lmp92001_adc_probe(struct platform_device *pdev) +{ + struct lmp92001 *lmp92001 = dev_get_drvdata(pdev->dev.parent); + struct iio_dev *indio_dev; + struct device_node *np = pdev->dev.of_node; + const char *conversion; + unsigned int cgen = 0, cad1, cad2, cad3; + u32 mask; + int ret; + + indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(*lmp92001)); + if (!indio_dev) + return -ENOMEM; + + mutex_init(&lmp92001->adc_lock); + + iio_device_set_drvdata(indio_dev, lmp92001); + + indio_dev->name = pdev->name; + indio_dev->dev.parent = &pdev->dev; + indio_dev->modes = INDIO_DIRECT_MODE; + indio_dev->info = &lmp92001_info; + indio_dev->channels = lmp92001_adc_channels; + indio_dev->num_channels = ARRAY_SIZE(lmp92001_adc_channels); + + ret = regmap_update_bits(lmp92001->regmap, LMP92001_CGEN, + CGEN_RST, CGEN_RST); + if (ret < 0) { + dev_err(&pdev->dev, "failed to self reset all registers\n"); + return ret; + } + + /* + * Turn on all of them, if you are pretty sure they are must be + * real-time update or specify which channel is needed to be used to + * save conversion time for a cycle. + */ + ret = of_property_read_u32(np, "ti,lmp92001-adc-mask", &mask); + if (ret < 0) { + cad1 = cad2 = cad3 = 0xFF; + dev_info(&pdev->dev, "turn on all of channels by default\n"); + } else { + cad1 = mask & 0xFF; + cad2 = (mask >> 8) & 0xFF; + cad3 = (mask >> 16) & 0xFF; + } + + ret = regmap_update_bits(lmp92001->regmap, LMP92001_CAD1, 0xFF, cad1); + if (ret < 0) { + dev_err(&pdev->dev, "failed to enable/disable channels 1-8\n"); + return ret; + } + + ret = regmap_update_bits(lmp92001->regmap, LMP92001_CAD2, 0xFF, cad2); + if (ret < 0) { + dev_err(&pdev->dev, "failed to enable/disable channels 9-16\n"); + return ret; + } + + ret = regmap_update_bits(lmp92001->regmap, LMP92001_CAD3, BIT(0), cad3); + if (ret < 0) { + dev_err(&pdev->dev, + "failed to enable/disable channel 17 (temperature)\n"); + return ret; + } + + ret = of_property_read_string_index(np, "ti,lmp92001-adc-mode", 0, + &conversion); + if (!ret) { + if (strncmp("continuous", conversion, 10) == 0) { + cgen |= 1; + } else if (strncmp("single-shot", conversion, 11) == 0) { + /* Okay */ + } else { + dev_warn(&pdev->dev, + "wrong adc mode! set to single-short conversion\n"); + } + } else + dev_info(&pdev->dev, + "single-short conversion was chosen by default\n"); + + /* Lock the HW registers and set conversion mode. */ + ret = regmap_update_bits(lmp92001->regmap, + LMP92001_CGEN, CGEN_LCK | CGEN_STRT, + cgen | CGEN_LCK); + if (ret < 0) + return ret; + + platform_set_drvdata(pdev, indio_dev); + + return devm_iio_device_register(&pdev->dev, indio_dev); +} + +static int lmp92001_adc_remove(struct platform_device *pdev) +{ + struct iio_dev *indio_dev = platform_get_drvdata(pdev); + struct lmp92001 *lmp92001 = iio_device_get_drvdata(indio_dev); + + /* + * To stop ADC conversion to save power + * + * Unlock the HW registers. + * Set conversion mode to single-shot. + * Lock the HW registers. + */ + regmap_update_bits(lmp92001->regmap, LMP92001_CGEN, CGEN_LCK, 0); + regmap_update_bits(lmp92001->regmap, LMP92001_CGEN, CGEN_STRT, 0); + regmap_update_bits(lmp92001->regmap, LMP92001_CGEN, CGEN_LCK, CGEN_LCK); + + devm_iio_device_unregister(&pdev->dev, indio_dev); + + return 0; +} + +static struct platform_driver lmp92001_adc_driver = { + .driver.name = "lmp92001-adc", + .probe = lmp92001_adc_probe, + .remove = lmp92001_adc_remove, +}; + +static int __init lmp92001_adc_init(void) +{ + return platform_driver_register(&lmp92001_adc_driver); +} +subsys_initcall(lmp92001_adc_init); + +static void __exit lmp92001_adc_exit(void) +{ + platform_driver_unregister(&lmp92001_adc_driver); +} +module_exit(lmp92001_adc_exit); + +MODULE_AUTHOR("Abhisit Sangjan <s.abhisit@xxxxxxxxx>"); +MODULE_DESCRIPTION("IIO ADC interface for TI LMP92001"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:lmp92001-adc"); diff --git a/drivers/iio/dac/Kconfig b/drivers/iio/dac/Kconfig index 25bed2d..3e0d816 100644 --- a/drivers/iio/dac/Kconfig +++ b/drivers/iio/dac/Kconfig @@ -221,6 +221,15 @@ config DPOT_DAC To compile this driver as a module, choose M here: the module will be called dpot-dac. +config LMP92001_DAC + tristate "TI LMP92001 DAC Driver" + depends on MFD_LMP92001 + help + If you say yes here you get support for TI LMP92001 DACs. + + This driver can also be built as a module. If so, the module will + be called lmp92001_dac. + config LPC18XX_DAC tristate "NXP LPC18xx DAC driver" depends on ARCH_LPC18XX || COMPILE_TEST diff --git a/drivers/iio/dac/Makefile b/drivers/iio/dac/Makefile index 603587c..516d2be 100644 --- a/drivers/iio/dac/Makefile +++ b/drivers/iio/dac/Makefile @@ -23,6 +23,7 @@ obj-$(CONFIG_AD7303) += ad7303.o obj-$(CONFIG_AD8801) += ad8801.o obj-$(CONFIG_CIO_DAC) += cio-dac.o obj-$(CONFIG_DPOT_DAC) += dpot-dac.o +obj-$(CONFIG_LMP92001_DAC) += lmp92001-dac.o obj-$(CONFIG_LPC18XX_DAC) += lpc18xx_dac.o obj-$(CONFIG_LTC2632) += ltc2632.o obj-$(CONFIG_M62332) += m62332.o diff --git a/drivers/iio/dac/lmp92001-dac.c b/drivers/iio/dac/lmp92001-dac.c new file mode 100644 index 0000000..8ea981b --- /dev/null +++ b/drivers/iio/dac/lmp92001-dac.c @@ -0,0 +1,390 @@ +/* + * lmp92001-dac.c - Support for TI LMP92001 DACs + * + * Copyright 2016-2017 Celestica Ltd. + * + * Author: Abhisit Sangjan <s.abhisit@xxxxxxxxx> + * + * Inspired by wm831x driver. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + */ + +#include <linux/iio/iio.h> +#include <linux/kernel.h> +#include <linux/mfd/core.h> +#include <linux/module.h> +#include <linux/platform_device.h> + +#include <linux/mfd/lmp92001/core.h> + +#define CREF_DEXT (1 << 0) /* 1 - DAC external reference. + * 0 - DAC internal reference. + */ +#define CDAC_OFF (1 << 0) /* 1 - Forces all outputs to high impedance. */ +#define CDAC_OLVL (1 << 1) /* 1 - Cy=0 will force associated OUTx outputs + * to VDD. + * 0 - Cy=0 will force associated OUTx outputs + * to GND. + */ +#define CDAC_GANG (1 << 2) /* Controls the association of analog output + * channels OUTx with asynchronous control + * inputs Cy. + * + * Cy to OUTx Assignment + * -------------------------------------- + * | Cy | CDAC:GANG = 0 | CDAC:GANG = 1 | + * -------------------------------------- + * | C1 | OUT[1:4] | OUT[1:3] | + * -------------------------------------- + * | C2 | OUT[5:6] | OUT[4:6] | + * -------------------------------------- + * | C3 | OUT[7:8] | OUT[7:9] | + * -------------------------------------- + * | C4 | OUT[9:12] | OUT[10:12] | + * -------------------------------------- + */ + +static int lmp92001_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *channel, + int *val, int *val2, + long mask) +{ + struct lmp92001 *lmp92001 = iio_device_get_drvdata(indio_dev); + int ret; + + mutex_lock(&lmp92001->dac_lock); + + switch (mask) { + case IIO_CHAN_INFO_RAW: + switch (channel->type) { + case IIO_VOLTAGE: + ret = regmap_read(lmp92001->regmap, + 0x7F + channel->channel, val); + if (ret < 0) + goto exit; + + ret = IIO_VAL_INT; + goto exit; + break; + default: + break; + } + break; + default: + break; + } + + /* In case of no match channel info/type is return here. */ + ret = -EINVAL; + +exit: + mutex_unlock(&lmp92001->dac_lock); + + return ret; +} + +int lmp92001_write_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *channel, + int val, int val2, + long mask) +{ + struct lmp92001 *lmp92001 = iio_device_get_drvdata(indio_dev); + int ret; + + mutex_lock(&lmp92001->dac_lock); + + if (val < 0 || val > 4095) { + ret = -EINVAL; + goto exit; + } + + switch (mask) { + case IIO_CHAN_INFO_RAW: + switch (channel->type) { + case IIO_VOLTAGE: + ret = regmap_write(lmp92001->regmap, + 0x7F + channel->channel, val); + if (ret < 0) + goto exit; + + ret = 0; + goto exit; + break; + default: + break; + } + break; + default: + break; + } + + /* In case of no match channel info/type is return here. */ + ret = -EINVAL; + +exit: + mutex_unlock(&lmp92001->dac_lock); + + return ret; +} + +static const struct iio_info lmp92001_info = { + .read_raw = lmp92001_read_raw, + .write_raw = lmp92001_write_raw, + .driver_module = THIS_MODULE, +}; + +ssize_t lmp92001_dvref_read(struct iio_dev *indio_dev, uintptr_t private, + struct iio_chan_spec const *channel, char *buf) +{ + struct lmp92001 *lmp92001 = iio_device_get_drvdata(indio_dev); + unsigned int cref; + int ret; + + ret = regmap_read(lmp92001->regmap, LMP92001_CREF, &cref); + if (ret < 0) + return ret; + + return sprintf(buf, "%s\n", cref & CREF_DEXT ? "external" : "internal"); +} + +ssize_t lmp92001_dvref_write(struct iio_dev *indio_dev, uintptr_t private, + struct iio_chan_spec const *channel, const char *buf, size_t len) +{ + struct lmp92001 *lmp92001 = iio_device_get_drvdata(indio_dev); + unsigned int cref; + int ret; + + if (strncmp("external", buf, 8) == 0) + cref = 1; + else if (strncmp("internal", buf, 8) == 0) + cref = 0; + else + return -EINVAL; + + ret = regmap_update_bits(lmp92001->regmap, LMP92001_CREF, CREF_DEXT, + cref); + if (ret < 0) + return ret; + + return len; +} + +ssize_t lmp92001_outx_read(struct iio_dev *indio_dev, uintptr_t private, + struct iio_chan_spec const *channel, char *buf) +{ + struct lmp92001 *lmp92001 = iio_device_get_drvdata(indio_dev); + unsigned int cdac; + const char *outx; + int ret; + + ret = regmap_read(lmp92001->regmap, LMP92001_CDAC, &cdac); + if (ret < 0) + return ret; + + if (cdac & CDAC_OFF) + outx = "hiz"; + else { + if (cdac & CDAC_OLVL) + outx = "1 or dac"; + else + outx = "0 or dac"; + } + + return sprintf(buf, "%s\n", outx); +} + +ssize_t lmp92001_outx_write(struct iio_dev *indio_dev, uintptr_t private, + struct iio_chan_spec const *channel, const char *buf, size_t len) +{ + struct lmp92001 *lmp92001 = iio_device_get_drvdata(indio_dev); + unsigned int cdac, mask; + int ret; + + if (strncmp("hiz", buf, 3) == 0) { + cdac = CDAC_OFF; + mask = CDAC_OFF; + } else if (strncmp("dac", buf, 3) == 0) { + cdac = ~CDAC_OFF; + mask = CDAC_OFF; + } else if (strncmp("0", buf, 1) == 0) { + cdac = ~(CDAC_OLVL | CDAC_OFF); + mask = CDAC_OLVL | CDAC_OFF; + } else if (strncmp("1", buf, 1) == 0) { + cdac = CDAC_OLVL; + mask = CDAC_OLVL | CDAC_OFF; + } else + return -EINVAL; + + ret = regmap_update_bits(lmp92001->regmap, LMP92001_CDAC, mask, cdac); + if (ret < 0) + return ret; + + return len; +} + +ssize_t lmp92001_gang_read(struct iio_dev *indio_dev, uintptr_t private, + struct iio_chan_spec const *channel, char *buf) +{ + struct lmp92001 *lmp92001 = iio_device_get_drvdata(indio_dev); + unsigned int cdac; + int ret; + + ret = regmap_read(lmp92001->regmap, LMP92001_CDAC, &cdac); + if (ret < 0) + return ret; + + return sprintf(buf, "%s\n", cdac & CDAC_GANG ? "1" : "0"); +} + +ssize_t lmp92001_gang_write(struct iio_dev *indio_dev, uintptr_t private, + struct iio_chan_spec const *channel, const char *buf, size_t len) +{ + struct lmp92001 *lmp92001 = iio_device_get_drvdata(indio_dev); + unsigned int cdac = 0; + int ret; + + if (strncmp("0", buf, 1) == 0) + cdac = ~CDAC_GANG; + else if (strncmp("1", buf, 1) == 0) + cdac = CDAC_GANG; + else + return -EINVAL; + + ret = regmap_update_bits(lmp92001->regmap, LMP92001_CDAC, CDAC_GANG, + cdac); + if (ret < 0) + return ret; + + return len; +} + +static const struct iio_chan_spec_ext_info lmp92001_ext_info[] = { + { + .name = "vref", + .read = lmp92001_dvref_read, + .write = lmp92001_dvref_write, + .shared = IIO_SHARED_BY_ALL, + }, + { + .name = "outx", + .read = lmp92001_outx_read, + .write = lmp92001_outx_write, + .shared = IIO_SHARED_BY_ALL, + }, + { + .name = "gang", + .read = lmp92001_gang_read, + .write = lmp92001_gang_write, + .shared = IIO_SHARED_BY_ALL, + }, + { }, +}; + +#define LMP92001_CHAN_SPEC(_ch) \ +{ \ + .channel = _ch, \ + .type = IIO_VOLTAGE, \ + .indexed = 1, \ + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ + .ext_info = lmp92001_ext_info, \ + .output = 1, \ +} + +static const struct iio_chan_spec lmp92001_dac_channels[] = { + LMP92001_CHAN_SPEC(1), + LMP92001_CHAN_SPEC(2), + LMP92001_CHAN_SPEC(3), + LMP92001_CHAN_SPEC(4), + LMP92001_CHAN_SPEC(5), + LMP92001_CHAN_SPEC(6), + LMP92001_CHAN_SPEC(7), + LMP92001_CHAN_SPEC(8), + LMP92001_CHAN_SPEC(9), + LMP92001_CHAN_SPEC(10), + LMP92001_CHAN_SPEC(11), + LMP92001_CHAN_SPEC(12), +}; + +static int lmp92001_dac_probe(struct platform_device *pdev) +{ + struct lmp92001 *lmp92001 = dev_get_drvdata(pdev->dev.parent); + struct iio_dev *indio_dev; + struct device_node *np = pdev->dev.of_node; + u8 gang = 0, outx = 0, hiz = 0; + unsigned int cdac = 0; + int ret; + + indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(*lmp92001)); + if (!indio_dev) + return -ENOMEM; + + mutex_init(&lmp92001->dac_lock); + + iio_device_set_drvdata(indio_dev, lmp92001); + + indio_dev->name = pdev->name; + indio_dev->modes = INDIO_DIRECT_MODE; + indio_dev->info = &lmp92001_info; + indio_dev->channels = lmp92001_dac_channels; + indio_dev->num_channels = ARRAY_SIZE(lmp92001_dac_channels); + + of_property_read_u8(np, "ti,lmp92001-dac-hiz", &hiz); + cdac |= hiz; + + of_property_read_u8(np, "ti,lmp92001-dac-outx", &outx); + cdac |= outx << 1; + + of_property_read_u8(np, "ti,lmp92001-dac-gang", &gang); + cdac |= gang << 2; + + ret = regmap_update_bits(lmp92001->regmap, LMP92001_CDAC, + CDAC_GANG | CDAC_OLVL | CDAC_OFF, cdac); + if (ret < 0) + return ret; + + platform_set_drvdata(pdev, indio_dev); + + return devm_iio_device_register(&pdev->dev, indio_dev); +} + +static int lmp92001_dac_remove(struct platform_device *pdev) +{ + struct iio_dev *indio_dev = platform_get_drvdata(pdev); + + devm_iio_device_unregister(&pdev->dev, indio_dev); + + return 0; +} + +static struct platform_driver lmp92001_dac_driver = { + .driver.name = "lmp92001-dac", + .probe = lmp92001_dac_probe, + .remove = lmp92001_dac_remove, +}; + +static int __init lmp92001_dac_init(void) +{ + return platform_driver_register(&lmp92001_dac_driver); +} +subsys_initcall(lmp92001_dac_init); + +static void __exit lmp92001_dac_exit(void) +{ + platform_driver_unregister(&lmp92001_dac_driver); +} +module_exit(lmp92001_dac_exit); + +MODULE_AUTHOR("Abhisit Sangjan <s.abhisit@xxxxxxxxx>"); +MODULE_DESCRIPTION("IIO DAC interface for TI LMP92001"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:lmp92001-dac"); diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig index 94ad2c1..a20389a 100644 --- a/drivers/mfd/Kconfig +++ b/drivers/mfd/Kconfig @@ -1528,6 +1528,18 @@ config MFD_LM3533 additional drivers must be enabled in order to use the LED, backlight or ambient-light-sensor functionality of the device. +config MFD_LMP92001 + tristate "TI LMP92001 Analog System Monitor and Controller" + depends on I2C + select MFD_CORE + select REGMAP_I2C + help + Say yes here to enable support for TI LMP92001 Analog System + Monitor and Controller + + This driver provide support for 16 ADC, 12 DAC, Voltage Reference, + Analog Temperature Sensor and 8-bit GPIO Port. + config MFD_TIMBERDALE tristate "Timberdale FPGA" select MFD_CORE diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile index 080793b..20d2e65 100644 --- a/drivers/mfd/Makefile +++ b/drivers/mfd/Makefile @@ -199,6 +199,10 @@ obj-$(CONFIG_MFD_RN5T618) += rn5t618.o obj-$(CONFIG_MFD_SEC_CORE) += sec-core.o sec-irq.o obj-$(CONFIG_MFD_SYSCON) += syscon.o obj-$(CONFIG_MFD_LM3533) += lm3533-core.o lm3533-ctrlbank.o + +lmp92001-objs := lmp92001-core.o lmp92001-i2c.o lmp92001-debug.o +obj-$(CONFIG_MFD_LMP92001) += lmp92001.o + obj-$(CONFIG_MFD_VEXPRESS_SYSREG) += vexpress-sysreg.o obj-$(CONFIG_MFD_RETU) += retu-mfd.o obj-$(CONFIG_MFD_AS3711) += as3711.o diff --git a/drivers/mfd/lmp92001-core.c b/drivers/mfd/lmp92001-core.c new file mode 100644 index 0000000..55bc9ab --- /dev/null +++ b/drivers/mfd/lmp92001-core.c @@ -0,0 +1,308 @@ +/* + * lmp92001-core.c - Device access for TI LMP92001 + * + * Copyright 2016-2017 Celestica Ltd. + * + * Author: Abhisit Sangjan <s.abhisit@xxxxxxxxx> + * + * Inspired by wm831x driver. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + */ + +#include <linux/mfd/lmp92001/core.h> +#include <linux/mfd/lmp92001/debug.h> + +static const struct mfd_cell lmp92001_devs[] = { + { + .name = "lmp92001-gpio", + .of_compatible = "ti,lmp92001-gpio", + }, + { + .name = "lmp92001-adc", + .of_compatible = "ti,lmp92001-adc", + }, + { + .name = "lmp92001-dac", + .of_compatible = "ti,lmp92001-dac", + }, +}; + +static struct reg_default lmp92001_defaults[] = { + { LMP92001_SGEN, 0x40 }, + { LMP92001_SHIL, 0x00 }, + { LMP92001_SLOL, 0x00 }, + { LMP92001_CGEN, 0x00 }, + { LMP92001_CDAC, 0x03 }, + { LMP92001_CGPO, 0xFF }, + { LMP92001_CINH, 0x00 }, + { LMP92001_CINL, 0x00 }, + { LMP92001_CAD1, 0x00 }, + { LMP92001_CAD2, 0x00 }, + { LMP92001_CAD3, 0x00 }, + { LMP92001_CTRIG, 0x00 }, + { LMP92001_CREF, 0x07 }, + { LMP92001_ADC1, 0x0000 }, + { LMP92001_ADC2, 0x0000 }, + { LMP92001_ADC3, 0x0000 }, + { LMP92001_ADC4, 0x0000 }, + { LMP92001_ADC5, 0x0000 }, + { LMP92001_ADC6, 0x0000 }, + { LMP92001_ADC7, 0x0000 }, + { LMP92001_ADC8, 0x0000 }, + { LMP92001_ADC9, 0x0000 }, + { LMP92001_ADC10, 0x0000 }, + { LMP92001_ADC11, 0x0000 }, + { LMP92001_ADC12, 0x0000 }, + { LMP92001_ADC13, 0x0000 }, + { LMP92001_ADC14, 0x0000 }, + { LMP92001_ADC15, 0x0000 }, + { LMP92001_ADC16, 0x0000 }, + { LMP92001_LIH1, 0x0FFF }, + { LMP92001_LIH2, 0x0FFF }, + { LMP92001_LIH3, 0x0FFF }, + { LMP92001_LIH9, 0x0FFF }, + { LMP92001_LIH10, 0x0FFF }, + { LMP92001_LIH11, 0x0FFF }, + { LMP92001_LIL1, 0x0000 }, + { LMP92001_LIL2, 0x0000 }, + { LMP92001_LIL3, 0x0000 }, + { LMP92001_LIL9, 0x0000 }, + { LMP92001_LIL10, 0x0000 }, + { LMP92001_LIL11, 0x0000 }, + { LMP92001_DAC1, 0x0000 }, + { LMP92001_DAC2, 0x0000 }, + { LMP92001_DAC3, 0x0000 }, + { LMP92001_DAC4, 0x0000 }, + { LMP92001_DAC5, 0x0000 }, + { LMP92001_DAC6, 0x0000 }, + { LMP92001_DAC7, 0x0000 }, + { LMP92001_DAC8, 0x0000 }, + { LMP92001_DAC9, 0x0000 }, + { LMP92001_DAC10, 0x0000 }, + { LMP92001_DAC11, 0x0000 }, + { LMP92001_DAC12, 0x0000 }, + { LMP92001_DALL, 0x0000 }, +}; + +static bool lmp92001_reg_readable(struct device *dev, unsigned int reg) +{ + switch (reg) { + case LMP92001_ID: + case LMP92001_VER: + case LMP92001_SGEN: + case LMP92001_SGPI: + case LMP92001_SHIL: + case LMP92001_SLOL: + case LMP92001_CGEN: + case LMP92001_CDAC: + case LMP92001_CGPO: + case LMP92001_CINH: + case LMP92001_CINL: + case LMP92001_CAD1: + case LMP92001_CAD2: + case LMP92001_CAD3: + case LMP92001_ADC1: + case LMP92001_ADC2: + case LMP92001_ADC3: + case LMP92001_ADC4: + case LMP92001_ADC5: + case LMP92001_ADC6: + case LMP92001_ADC7: + case LMP92001_ADC8: + case LMP92001_ADC9: + case LMP92001_ADC10: + case LMP92001_ADC11: + case LMP92001_ADC12: + case LMP92001_ADC13: + case LMP92001_ADC14: + case LMP92001_ADC15: + case LMP92001_ADC16: + case LMP92001_ADC17: + case LMP92001_LIH1: + case LMP92001_LIH2: + case LMP92001_LIH3: + case LMP92001_LIH9: + case LMP92001_LIH10: + case LMP92001_LIH11: + case LMP92001_LIL1: + case LMP92001_LIL2: + case LMP92001_LIL3: + case LMP92001_LIL9: + case LMP92001_LIL10: + case LMP92001_LIL11: + case LMP92001_CREF: + case LMP92001_DAC1: + case LMP92001_DAC2: + case LMP92001_DAC3: + case LMP92001_DAC4: + case LMP92001_DAC5: + case LMP92001_DAC6: + case LMP92001_DAC7: + case LMP92001_DAC8: + case LMP92001_DAC9: + case LMP92001_DAC10: + case LMP92001_DAC11: + case LMP92001_DAC12: + case LMP92001_BLK0: + case LMP92001_BLK1: + case LMP92001_BLK2: + case LMP92001_BLK3: + case LMP92001_BLK4: + case LMP92001_BLK5: + return true; + default: + return false; + } +} + +static bool lmp92001_reg_writeable(struct device *dev, unsigned int reg) +{ + switch (reg) { + case LMP92001_CGEN: + case LMP92001_CDAC: + case LMP92001_CGPO: + case LMP92001_CINH: + case LMP92001_CINL: + case LMP92001_CAD1: + case LMP92001_CAD2: + case LMP92001_CAD3: + case LMP92001_CTRIG: + case LMP92001_LIH1: + case LMP92001_LIH2: + case LMP92001_LIH3: + case LMP92001_LIH9: + case LMP92001_LIH10: + case LMP92001_LIH11: + case LMP92001_LIL1: + case LMP92001_LIL2: + case LMP92001_LIL3: + case LMP92001_LIL9: + case LMP92001_LIL10: + case LMP92001_LIL11: + case LMP92001_CREF: + case LMP92001_DAC1: + case LMP92001_DAC2: + case LMP92001_DAC3: + case LMP92001_DAC4: + case LMP92001_DAC5: + case LMP92001_DAC6: + case LMP92001_DAC7: + case LMP92001_DAC8: + case LMP92001_DAC9: + case LMP92001_DAC10: + case LMP92001_DAC11: + case LMP92001_DAC12: + case LMP92001_DALL: + case LMP92001_BLK0: + case LMP92001_BLK1: + case LMP92001_BLK4: + case LMP92001_BLK5: + return true; + default: + return false; + } +} + +static bool lmp92001_reg_volatile(struct device *dev, unsigned int reg) +{ + switch (reg) { + case LMP92001_SGEN: + case LMP92001_SGPI: + case LMP92001_SHIL: + case LMP92001_SLOL: + case LMP92001_CGEN: + case LMP92001_ADC1: + case LMP92001_ADC2: + case LMP92001_ADC3: + case LMP92001_ADC4: + case LMP92001_ADC5: + case LMP92001_ADC6: + case LMP92001_ADC7: + case LMP92001_ADC8: + case LMP92001_ADC9: + case LMP92001_ADC10: + case LMP92001_ADC11: + case LMP92001_ADC12: + case LMP92001_ADC13: + case LMP92001_ADC14: + case LMP92001_ADC15: + case LMP92001_ADC16: + case LMP92001_ADC17: + case LMP92001_BLK2: + case LMP92001_BLK3: + return true; + default: + return false; + } +} + +struct regmap_config lmp92001_regmap_config = { + .reg_bits = 8, + .val_bits = 16, + + .cache_type = REGCACHE_RBTREE, + + .reg_defaults = lmp92001_defaults, + .num_reg_defaults = ARRAY_SIZE(lmp92001_defaults), + + .max_register = LMP92001_BLK5, + .readable_reg = lmp92001_reg_readable, + .writeable_reg = lmp92001_reg_writeable, + .volatile_reg = lmp92001_reg_volatile, +}; + +int lmp92001_device_init(struct lmp92001 *lmp92001, unsigned long id, int irq) +{ + int ret; + unsigned int comid, ver; + + dev_set_drvdata(lmp92001->dev, lmp92001); + + ret = regmap_read(lmp92001->regmap, LMP92001_ID, &comid); + if (ret < 0) { + dev_err(lmp92001->dev, "failed to read Company ID: %d\n", ret); + goto exit; + } + + ret = regmap_read(lmp92001->regmap, LMP92001_VER, &ver); + if (ret < 0) { + dev_err(lmp92001->dev, "failed to read Version: %d\n", ret); + goto exit; + } + + dev_info(lmp92001->dev, "Company ID 0x%.2x, Version 0x%.2x\n", + comid, ver); + + ret = mfd_add_devices(lmp92001->dev, PLATFORM_DEVID_AUTO, + lmp92001_devs, ARRAY_SIZE(lmp92001_devs), + NULL, 0, NULL); + if (ret != 0) { + dev_err(lmp92001->dev, "failed to add children\n"); + goto exit; + } + + ret = lmp92001_debug_init(lmp92001); + if (ret < 0) { + dev_err(lmp92001->dev, "failed to initial debug fs.\n"); + goto exit; + } + +exit: + return ret; +} + +void lmp92001_device_exit(struct lmp92001 *lmp92001) +{ + lmp92001_debug_exit(lmp92001); + mfd_remove_devices(lmp92001->dev); +} diff --git a/drivers/mfd/lmp92001-debug.c b/drivers/mfd/lmp92001-debug.c new file mode 100644 index 0000000..d733e67 --- /dev/null +++ b/drivers/mfd/lmp92001-debug.c @@ -0,0 +1,67 @@ +/* + * lmp92001-debug.c - Debug file system for TI LMP92001 + * + * Copyright 2016-2017 Celestica Ltd. + * + * Author: Abhisit Sangjan <s.abhisit@xxxxxxxxx> + * + * Inspired by wm831x driver. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + */ + +#include <linux/kernel.h> + +#include <linux/mfd/lmp92001/core.h> + +static ssize_t lmp92001_id_ver_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct lmp92001 *lmp92001 = dev_get_drvdata(dev); + int ret; + unsigned int comid, ver; + + ret = regmap_read(lmp92001->regmap, LMP92001_ID, &comid); + if (ret < 0) { + dev_err(lmp92001->dev, "failed to read Company ID: %d\n", ret); + return 0; + } + + ret = regmap_read(lmp92001->regmap, LMP92001_VER, &ver); + if (ret < 0) { + dev_err(lmp92001->dev, "failed to read Version: %d\n", ret); + return 0; + } + + ret = sprintf(buf, "Company ID 0x%02x (%d), Version 0x%02x (%d)\n", + comid, comid, ver, ver); + + return ret; +} +static DEVICE_ATTR(lmp92001_id_ver, 0444, lmp92001_id_ver_show, NULL); + +int lmp92001_debug_init(struct lmp92001 *lmp92001) +{ + int ret; + + ret = device_create_file(lmp92001->dev, &dev_attr_lmp92001_id_ver); + if (ret != 0) + dev_err(lmp92001->dev, + "unique ID attribute is not created: %d\n", ret); + + return ret; +} + +void lmp92001_debug_exit(struct lmp92001 *lmp92001) +{ + device_remove_file(lmp92001->dev, &dev_attr_lmp92001_id_ver); +} diff --git a/drivers/mfd/lmp92001-i2c.c b/drivers/mfd/lmp92001-i2c.c new file mode 100644 index 0000000..bbb1dad --- /dev/null +++ b/drivers/mfd/lmp92001-i2c.c @@ -0,0 +1,215 @@ +/* + * lmp92001-i2c.c - I2C access for TI LMP92001 + * + * Copyright 2016-2017 Celestica Ltd. + * + * Author: Abhisit Sangjan <s.abhisit@xxxxxxxxx> + * + * Inspired by wm831x driver. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + */ + +#include <linux/err.h> +#include <linux/i2c.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/of_device.h> +#include <linux/of_gpio.h> +#include <linux/platform_device.h> +#include <linux/slab.h> + +#include <linux/mfd/lmp92001/core.h> + +static const unsigned short lmp92001_i2c_addresses[] = { + 0x40, 0x42, 0x44, 0x46, 0x48, 0x4A, 0x4C, 0x4E, 0x50, I2C_CLIENT_END +}; + +/* TODO: To read/write block access, it may need to re-ordering endianness! */ +static int lmp92001_reg_read(void *context, unsigned int reg, unsigned int *val) +{ + struct device *dev = context; + struct i2c_client *i2c = to_i2c_client(dev); + int ret; + + if (reg > 0xff) + return -EINVAL; + + switch (reg) { + case LMP92001_ID ... LMP92001_CTRIG: + case LMP92001_CREF: + ret = i2c_smbus_read_byte_data(i2c, reg); + break; + case LMP92001_ADC1 ... LMP92001_LIL11: + case LMP92001_DAC1 ... LMP92001_DALL: + ret = i2c_smbus_read_word_swapped(i2c, reg); + break; + case LMP92001_BLK0 ... LMP92001_BLK5: + ret = i2c_smbus_read_block_data(i2c, reg, + (u8 *)((uintptr_t)*val)); + break; + default: + return -EINVAL; + } + + if (ret < 0) + return ret; + + if (reg <= LMP92001_DALL) + *val = ret; + + return 0; +} + +static int lmp92001_reg_write(void *context, unsigned int reg, unsigned int val) +{ + struct device *dev = context; + struct i2c_client *i2c = to_i2c_client(dev); + int ret; + + if (reg > 0xff) + return -EINVAL; + + switch (reg) { + case LMP92001_ID ... LMP92001_CTRIG: + case LMP92001_CREF: + ret = i2c_smbus_write_byte_data(i2c, reg, val); + break; + case LMP92001_ADC1 ... LMP92001_LIL11: + case LMP92001_DAC1 ... LMP92001_DALL: + ret = i2c_smbus_write_word_swapped(i2c, reg, val); + break; + /* To call this function/case, must be passed val as pointer */ + case LMP92001_BLK0: + case LMP92001_BLK4: + ret = i2c_smbus_write_block_data(i2c, reg, 24, + (u8 *)((uintptr_t)val)); + break; + case LMP92001_BLK1: + case LMP92001_BLK5: + ret = i2c_smbus_write_block_data(i2c, reg, 12, + (u8 *)((uintptr_t)val)); + break; + case LMP92001_BLK2: + ret = i2c_smbus_write_block_data(i2c, reg, 34, + (u8 *)((uintptr_t)val)); + break; + case LMP92001_BLK3: + ret = i2c_smbus_write_block_data(i2c, reg, 18, + (u8 *)((uintptr_t)val)); + break; + default: + return -EINVAL; + } + + return ret; +} + +static int lmp92001_i2c_probe(struct i2c_client *i2c, + const struct i2c_device_id *id) +{ + struct lmp92001 *lmp92001; + int ret; + + lmp92001 = devm_kzalloc(&i2c->dev, sizeof(struct lmp92001), GFP_KERNEL); + if (!lmp92001) + return -ENOMEM; + + i2c_set_clientdata(i2c, lmp92001); + lmp92001->dev = &i2c->dev; + + lmp92001_regmap_config.reg_read = lmp92001_reg_read; + lmp92001_regmap_config.reg_write = lmp92001_reg_write; + + lmp92001->regmap = devm_regmap_init(&i2c->dev, NULL, &i2c->dev, + &lmp92001_regmap_config); + if (IS_ERR(lmp92001->regmap)) { + ret = PTR_ERR(lmp92001->regmap); + dev_err(lmp92001->dev, "failed to allocate register map: %d\n", + ret); + return ret; + } + + return lmp92001_device_init(lmp92001, id->driver_data, i2c->irq); +} + +static int lmp92001_i2c_remove(struct i2c_client *i2c) +{ + struct lmp92001 *lmp92001 = i2c_get_clientdata(i2c); + + lmp92001_device_exit(lmp92001); + + return 0; +} + +#ifdef CONFIG_OF +static const struct of_device_id lmp92001_dt_ids[] = { + { .compatible = "ti,lmp92001", }, + { }, +}; +MODULE_DEVICE_TABLE(of, lmp92001_dt_ids); +#endif + +static const struct i2c_device_id lmp92001_i2c_ids[] = { + { "lmp92001" }, + { }, +}; +MODULE_DEVICE_TABLE(i2c, lmp92001_i2c_ids); + +static int lmp92001_i2c_detect(struct i2c_client *i2c, + struct i2c_board_info *info) +{ + struct i2c_adapter *adapter = i2c->adapter; + s32 comid, ver; + + if (!i2c_check_functionality(adapter, + I2C_FUNC_SMBUS_BYTE_DATA | + I2C_FUNC_SMBUS_WORD_DATA | + I2C_FUNC_SMBUS_BLOCK_DATA)) + return -ENODEV; + + comid = i2c_smbus_read_byte_data(i2c, LMP92001_ID); + ver = i2c_smbus_read_byte_data(i2c, LMP92001_VER); + + if (comid != 0x01 || ver != 0x10) + return -ENODEV; + + return 0; +} + +static struct i2c_driver lmp92001_i2c_driver = { + .driver = { + .name = "lmp92001", + .of_match_table = of_match_ptr(lmp92001_dt_ids), + }, + .probe = lmp92001_i2c_probe, + .remove = lmp92001_i2c_remove, + .id_table = lmp92001_i2c_ids, + .detect = lmp92001_i2c_detect, + .address_list = lmp92001_i2c_addresses, +}; + +static int __init lmp92001_i2c_init(void) +{ + return i2c_add_driver(&lmp92001_i2c_driver); +} +subsys_initcall(lmp92001_i2c_init); + +static void __exit lmp92001_i2c_exit(void) +{ + i2c_del_driver(&lmp92001_i2c_driver); +} +module_exit(lmp92001_i2c_exit); + +MODULE_DESCRIPTION("i2c driver for TI LMP92001"); +MODULE_AUTHOR("Abhisit Sangjan <s.abhisit@xxxxxxxxx>"); +MODULE_LICENSE("GPL"); diff --git a/include/linux/mfd/lmp92001/core.h b/include/linux/mfd/lmp92001/core.h new file mode 100644 index 0000000..9039000 --- /dev/null +++ b/include/linux/mfd/lmp92001/core.h @@ -0,0 +1,119 @@ +/* + * include/linux/mfd/lmp92001/core.h - Core interface for TI LMP92001 + * + * Copyright 2016-2017 Celestica Ltd. + * + * Author: Abhisit Sangjan <s.abhisit@xxxxxxxxx> + * + * Inspired by wm831x driver. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + */ + +#ifndef __MFD_LMP92001_CORE_H__ +#define __MFD_LMP92001_CORE_H__ + +#include <linux/device.h> +#include <linux/mfd/core.h> +#include <linux/mutex.h> +#include <linux/regmap.h> + +/* + * Register values. + */ +/* ID */ +#define LMP92001_ID 0x0E +#define LMP92001_VER 0x0F +/* STATUS */ +#define LMP92001_SGEN 0x10 +#define LMP92001_SGPI 0x11 +#define LMP92001_SHIL 0x12 +#define LMP92001_SLOL 0x13 +/* CONTROL */ +#define LMP92001_CGEN 0x14 +#define LMP92001_CDAC 0x15 +#define LMP92001_CGPO 0x16 +#define LMP92001_CINH 0x17 +#define LMP92001_CINL 0x18 +#define LMP92001_CAD1 0x19 +#define LMP92001_CAD2 0x1A +#define LMP92001_CAD3 0x1B +#define LMP92001_CTRIG 0x1C +/* ADC OUTPUT DATA */ +#define LMP92001_ADC1 0x20 +#define LMP92001_ADC2 0x21 +#define LMP92001_ADC3 0x22 +#define LMP92001_ADC4 0x23 +#define LMP92001_ADC5 0x24 +#define LMP92001_ADC6 0x25 +#define LMP92001_ADC7 0x26 +#define LMP92001_ADC8 0x27 +#define LMP92001_ADC9 0x28 +#define LMP92001_ADC10 0x29 +#define LMP92001_ADC11 0x2A +#define LMP92001_ADC12 0x2B +#define LMP92001_ADC13 0x2C +#define LMP92001_ADC14 0x2D +#define LMP92001_ADC15 0x2E +#define LMP92001_ADC16 0x2F +#define LMP92001_ADC17 0x30 +/* ADC WINDOW COMPARATOR LIMITS */ +#define LMP92001_LIH1 0x40 +#define LMP92001_LIH2 0x41 +#define LMP92001_LIH3 0x42 +#define LMP92001_LIH9 0x43 +#define LMP92001_LIH10 0x44 +#define LMP92001_LIH11 0x45 +#define LMP92001_LIL1 0x46 +#define LMP92001_LIL2 0x47 +#define LMP92001_LIL3 0x48 +#define LMP92001_LIL9 0x49 +#define LMP92001_LIL10 0x4A +#define LMP92001_LIL11 0x4B +/* INTERNAL REFERENCE CONTROL */ +#define LMP92001_CREF 0x66 +/* DAC INPUT DATA */ +#define LMP92001_DAC1 0x80 +#define LMP92001_DAC2 0x81 +#define LMP92001_DAC3 0x82 +#define LMP92001_DAC4 0x83 +#define LMP92001_DAC5 0x84 +#define LMP92001_DAC6 0x85 +#define LMP92001_DAC7 0x86 +#define LMP92001_DAC8 0x87 +#define LMP92001_DAC9 0x88 +#define LMP92001_DAC10 0x89 +#define LMP92001_DAC11 0x8A +#define LMP92001_DAC12 0x8B +#define LMP92001_DALL 0x90 +/* MEMORY MAPPED BLOCK COMMANDS */ +#define LMP92001_BLK0 0xF0 +#define LMP92001_BLK1 0xF1 +#define LMP92001_BLK2 0xF2 +#define LMP92001_BLK3 0xF3 +#define LMP92001_BLK4 0xF4 +#define LMP92001_BLK5 0xF5 + +struct lmp92001 { + struct device *dev; + struct regmap *regmap; + + struct mutex adc_lock; + struct mutex dac_lock; +}; + +extern struct regmap_config lmp92001_regmap_config; + +int lmp92001_device_init(struct lmp92001 *lmp92001, unsigned long id, int irq); +void lmp92001_device_exit(struct lmp92001 *lmp92001); + +#endif /* __MFD_LMP92001_CORE_H__ */ diff --git a/include/linux/mfd/lmp92001/debug.h b/include/linux/mfd/lmp92001/debug.h new file mode 100644 index 0000000..efef95f --- /dev/null +++ b/include/linux/mfd/lmp92001/debug.h @@ -0,0 +1,28 @@ +/* + * include/linux/mfd/lmp92001/debug.h - Debug interface for TI 92001 + * + * Copyright 2016-2017 Celestica Ltd. + * + * Author: Abhisit Sangjan <s.abhisit@xxxxxxxxx> + * + * Inspired by wm831x driver. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + */ + +#ifndef __MFD_LMP92001_DEBUG_H__ +#define __MFD_LMP92001_DEBUG_H__ + +int lmp92001_debug_init(struct lmp92001 *lmp92001); +void lmp92001_debug_exit(struct lmp92001 *lmp92001); + +#endif /* __MFD_LMP92001_DEBUG_H__ */ -- 2.7.4 -- To unsubscribe from this list: send the line "unsubscribe linux-iio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html