On 05/10/15 07:14, H. Nikolaus Schaller wrote: > This driver code was found as: > > https://android.googlesource.com/kernel/tegra/+/aaabb2e045f31e5a970109ffdaae900dd403d17e/drivers/staging/iio/adc > > Fixed various compilation issues and test this driver on omap5 evm. > > Signed-off-by: Pradeep Goudagunta <pgoudagunta@xxxxxxxxxx> > Signed-off-by: H. Nikolaus Schaller <hns@xxxxxxxxxxxxx> > Signed-off-by: Marek Belisko <marek@xxxxxxxxxxxxx> I'm pretty much fine with this. However, there are some edits within the existing mfd support so I will want acks for that or for the driver to go through the MFD tree (note that as it touched that, even if only a header, Lee and Samuel should have been cc'd). One thing that slightly confuses me is there seems to be hints of support in the mfd driver already... I can't find any sign of the child device however so I guess this is fine from that point of view. Reviewed-by: Jonathan Cameron <jic23@xxxxxxxxxx> > --- > drivers/iio/adc/Kconfig | 9 + > drivers/iio/adc/Makefile | 1 + > drivers/iio/adc/palmas_gpadc.c | 818 +++++++++++++++++++++++++++++++++++++++++ > include/linux/mfd/palmas.h | 75 ++-- > 4 files changed, 879 insertions(+), 24 deletions(-) > create mode 100644 drivers/iio/adc/palmas_gpadc.c > > diff --git a/drivers/iio/adc/Kconfig b/drivers/iio/adc/Kconfig > index eb0cd89..05a0368 100644 > --- a/drivers/iio/adc/Kconfig > +++ b/drivers/iio/adc/Kconfig > @@ -242,6 +242,15 @@ config NAU7802 > To compile this driver as a module, choose M here: the > module will be called nau7802. > > +config PALMAS_GPADC > + tristate "TI Palmas General Purpose ADC" > + depends on MFD_PALMAS > + help > + Say yes here to build support for Texas Instruments Palmas. > + > + Palmas series pmic chip (twl6035/6037) is used in smartphones and > + tablets and supports a 16 channel general purpose ADC. > + > config QCOM_SPMI_IADC > tristate "Qualcomm SPMI PMIC current ADC" > depends on SPMI > diff --git a/drivers/iio/adc/Makefile b/drivers/iio/adc/Makefile > index a096210..716f112 100644 > --- a/drivers/iio/adc/Makefile > +++ b/drivers/iio/adc/Makefile > @@ -26,6 +26,7 @@ obj-$(CONFIG_MCP320X) += mcp320x.o > obj-$(CONFIG_MCP3422) += mcp3422.o > obj-$(CONFIG_MEN_Z188_ADC) += men_z188_adc.o > obj-$(CONFIG_NAU7802) += nau7802.o > +obj-$(CONFIG_PALMAS_GPADC) += palmas_gpadc.o > obj-$(CONFIG_QCOM_SPMI_IADC) += qcom-spmi-iadc.o > obj-$(CONFIG_QCOM_SPMI_VADC) += qcom-spmi-vadc.o > obj-$(CONFIG_ROCKCHIP_SARADC) += rockchip_saradc.o > diff --git a/drivers/iio/adc/palmas_gpadc.c b/drivers/iio/adc/palmas_gpadc.c > new file mode 100644 > index 0000000..6805d81 > --- /dev/null > +++ b/drivers/iio/adc/palmas_gpadc.c > @@ -0,0 +1,818 @@ > +/* > + * palmas-adc.c -- TI PALMAS GPADC. > + * > + * Copyright (c) 2013, NVIDIA Corporation. All rights reserved. > + * > + * Author: Pradeep Goudagunta <pgoudagunta@xxxxxxxxxx> > + * > + * 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 version 2. > + */ > + > +#include <linux/module.h> > +#include <linux/err.h> > +#include <linux/irq.h> > +#include <linux/interrupt.h> > +#include <linux/platform_device.h> > +#include <linux/slab.h> > +#include <linux/delay.h> > +#include <linux/i2c.h> > +#include <linux/pm.h> > +#include <linux/mfd/palmas.h> > +#include <linux/completion.h> > +#include <linux/iio/iio.h> > +#include <linux/iio/machine.h> > +#include <linux/iio/driver.h> > + > +#define MOD_NAME "palmas-gpadc" > +#define PALMAS_ADC_CONVERSION_TIMEOUT (msecs_to_jiffies(5000)) > +#define PALMAS_TO_BE_CALCULATED 0 > +#define PALMAS_GPADC_TRIMINVALID -1 > + > +struct palmas_gpadc_info { > +/* calibration codes and regs */ > + int x1; /* lower ideal code */ > + int x2; /* higher ideal code */ > + int v1; /* expected lower volt reading */ > + int v2; /* expected higher volt reading */ > + u8 trim1_reg; /* register number for lower trim */ > + u8 trim2_reg; /* register number for upper trim */ > + int gain; /* calculated from above (after reading trim regs) */ > + int offset; /* calculated from above (after reading trim regs) */ > + int gain_error; /* calculated from above (after reading trim regs) */ > + bool is_uncalibrated; /* if channel has calibration data */ > +}; > + > +#define PALMAS_ADC_INFO(_chan, _x1, _x2, _v1, _v2, _t1, _t2, _is_uncalibrated) \ > + [PALMAS_ADC_CH_##_chan] = { \ > + .x1 = _x1, \ > + .x2 = _x2, \ > + .v1 = _v1, \ > + .v2 = _v2, \ > + .gain = PALMAS_TO_BE_CALCULATED, \ > + .offset = PALMAS_TO_BE_CALCULATED, \ > + .gain_error = PALMAS_TO_BE_CALCULATED, \ > + .trim1_reg = PALMAS_GPADC_TRIM##_t1, \ > + .trim2_reg = PALMAS_GPADC_TRIM##_t2, \ > + .is_uncalibrated = _is_uncalibrated \ > + } > + > +static struct palmas_gpadc_info palmas_gpadc_info[] = { > + PALMAS_ADC_INFO(IN0, 2064, 3112, 630, 950, 1, 2, false), > + PALMAS_ADC_INFO(IN1, 2064, 3112, 630, 950, 1, 2, false), > + PALMAS_ADC_INFO(IN2, 2064, 3112, 1260, 1900, 3, 4, false), > + PALMAS_ADC_INFO(IN3, 2064, 3112, 630, 950, 1, 2, false), > + PALMAS_ADC_INFO(IN4, 2064, 3112, 630, 950, 1, 2, false), > + PALMAS_ADC_INFO(IN5, 2064, 3112, 630, 950, 1, 2, false), > + PALMAS_ADC_INFO(IN6, 2064, 3112, 2520, 3800, 5, 6, false), > + PALMAS_ADC_INFO(IN7, 2064, 3112, 2520, 3800, 7, 8, false), > + PALMAS_ADC_INFO(IN8, 2064, 3112, 3150, 4750, 9, 10, false), > + PALMAS_ADC_INFO(IN9, 2064, 3112, 5670, 8550, 11, 12, false), > + PALMAS_ADC_INFO(IN10, 2064, 3112, 3465, 5225, 13, 14, false), > + PALMAS_ADC_INFO(IN11, 0, 0, 0, 0, INVALID, INVALID, true), > + PALMAS_ADC_INFO(IN12, 0, 0, 0, 0, INVALID, INVALID, true), > + PALMAS_ADC_INFO(IN13, 0, 0, 0, 0, INVALID, INVALID, true), > + PALMAS_ADC_INFO(IN14, 2064, 3112, 3645, 5225, 15, 16, false), > + PALMAS_ADC_INFO(IN15, 0, 0, 0, 0, INVALID, INVALID, true), > +}; > + > +/** > + * struct palmas_gpadc - the palmas_gpadc structure > + * @ch0_current: channel 0 current source setting > + * 0: 0 uA > + * 1: 5 uA > + * 2: 15 uA > + * 3: 20 uA > + * @ch3_current: channel 3 current source setting > + * 0: 0 uA > + * 1: 10 uA > + * 2: 400 uA > + * 3: 800 uA > + * @extended_delay: enable the gpadc extended delay mode > + * @auto_conversion_period: define the auto_conversion_period > + * > + * This is the palmas_gpadc structure to store run-time information > + * and pointers for this driver instance. > + */ > + > +struct palmas_gpadc { > + struct device *dev; > + struct palmas *palmas; > + u8 ch0_current; > + u8 ch3_current; > + bool extended_delay; > + int irq; > + int irq_auto_0; > + int irq_auto_1; > + struct palmas_gpadc_info *adc_info; > + struct completion conv_completion; > + struct palmas_adc_wakeup_property wakeup1_data; > + struct palmas_adc_wakeup_property wakeup2_data; > + bool wakeup1_enable; > + bool wakeup2_enable; > + int auto_conversion_period; > +}; > + > +/* > + * GPADC lock issue in AUTO mode. > + * Impact: In AUTO mode, GPADC conversion can be locked after disabling AUTO > + * mode feature. > + * Details: > + * When the AUTO mode is the only conversion mode enabled, if the AUTO > + * mode feature is disabled with bit GPADC_AUTO_CTRL. AUTO_CONV1_EN = 0 > + * or bit GPADC_AUTO_CTRL. AUTO_CONV0_EN = 0 during a conversion, the > + * conversion mechanism can be seen as locked meaning that all following > + * conversion will give 0 as a result. Bit GPADC_STATUS.GPADC_AVAILABLE > + * will stay at 0 meaning that GPADC is busy. An RT conversion can unlock > + * the GPADC. > + * > + * Workaround(s): > + * To avoid the lock mechanism, the workaround to follow before any stop > + * conversion request is: > + * Force the GPADC state machine to be ON by using the GPADC_CTRL1. > + * GPADC_FORCE bit = 1 > + * Shutdown the GPADC AUTO conversion using > + * GPADC_AUTO_CTRL.SHUTDOWN_CONV[01] = 0. > + * After 100us, force the GPADC state machine to be OFF by using the > + * GPADC_CTRL1. GPADC_FORCE bit = 0 > + */ > + > +static int palmas_disable_auto_conversion(struct palmas_gpadc *adc) > +{ > + int ret; > + > + ret = palmas_update_bits(adc->palmas, PALMAS_GPADC_BASE, > + PALMAS_GPADC_CTRL1, > + PALMAS_GPADC_CTRL1_GPADC_FORCE, > + PALMAS_GPADC_CTRL1_GPADC_FORCE); > + if (ret < 0) { > + dev_err(adc->dev, "GPADC_CTRL1 update failed: %d\n", ret); > + return ret; > + } > + > + ret = palmas_update_bits(adc->palmas, PALMAS_GPADC_BASE, > + PALMAS_GPADC_AUTO_CTRL, > + PALMAS_GPADC_AUTO_CTRL_SHUTDOWN_CONV1 | > + PALMAS_GPADC_AUTO_CTRL_SHUTDOWN_CONV0, > + 0); > + if (ret < 0) { > + dev_err(adc->dev, "AUTO_CTRL update failed: %d\n", ret); > + return ret; > + } > + > + udelay(100); > + > + ret = palmas_update_bits(adc->palmas, PALMAS_GPADC_BASE, > + PALMAS_GPADC_CTRL1, > + PALMAS_GPADC_CTRL1_GPADC_FORCE, 0); > + if (ret < 0) > + dev_err(adc->dev, "GPADC_CTRL1 update failed: %d\n", ret); > + > + return ret; > +} > + > +static irqreturn_t palmas_gpadc_irq(int irq, void *data) > +{ > + struct palmas_gpadc *adc = data; > + > + complete(&adc->conv_completion); > + > + return IRQ_HANDLED; > +} > + > +static irqreturn_t palmas_gpadc_irq_auto(int irq, void *data) > +{ > + struct palmas_gpadc *adc = data; > + > + dev_dbg(adc->dev, "Threshold interrupt %d occurs\n", irq); > + palmas_disable_auto_conversion(adc); > + > + return IRQ_HANDLED; > +} > + > +static int palmas_gpadc_start_mask_interrupt(struct palmas_gpadc *adc, > + bool mask) > +{ > + int ret; > + > + if (!mask) > + ret = palmas_update_bits(adc->palmas, PALMAS_INTERRUPT_BASE, > + PALMAS_INT3_MASK, > + PALMAS_INT3_MASK_GPADC_EOC_SW, 0); > + else > + ret = palmas_update_bits(adc->palmas, PALMAS_INTERRUPT_BASE, > + PALMAS_INT3_MASK, > + PALMAS_INT3_MASK_GPADC_EOC_SW, > + PALMAS_INT3_MASK_GPADC_EOC_SW); > + if (ret < 0) > + dev_err(adc->dev, "GPADC INT MASK update failed: %d\n", ret); > + > + return ret; > +} > + > +static int palmas_gpadc_enable(struct palmas_gpadc *adc, int adc_chan, > + int enable) > +{ > + unsigned int mask, val; > + int ret; > + > + if (enable) { > + val = (adc->extended_delay > + << PALMAS_GPADC_RT_CTRL_EXTEND_DELAY_SHIFT); > + ret = palmas_update_bits(adc->palmas, PALMAS_GPADC_BASE, > + PALMAS_GPADC_RT_CTRL, > + PALMAS_GPADC_RT_CTRL_EXTEND_DELAY, val); > + if (ret < 0) { > + dev_err(adc->dev, "RT_CTRL update failed: %d\n", ret); > + return ret; > + } > + > + mask = (PALMAS_GPADC_CTRL1_CURRENT_SRC_CH0_MASK | > + PALMAS_GPADC_CTRL1_CURRENT_SRC_CH3_MASK | > + PALMAS_GPADC_CTRL1_GPADC_FORCE); > + val = (adc->ch0_current > + << PALMAS_GPADC_CTRL1_CURRENT_SRC_CH0_SHIFT); > + val |= (adc->ch3_current > + << PALMAS_GPADC_CTRL1_CURRENT_SRC_CH3_SHIFT); > + val |= PALMAS_GPADC_CTRL1_GPADC_FORCE; > + ret = palmas_update_bits(adc->palmas, PALMAS_GPADC_BASE, > + PALMAS_GPADC_CTRL1, mask, val); > + if (ret < 0) { > + dev_err(adc->dev, > + "Failed to update current setting: %d\n", ret); > + return ret; > + } > + > + mask = (PALMAS_GPADC_SW_SELECT_SW_CONV0_SEL_MASK | > + PALMAS_GPADC_SW_SELECT_SW_CONV_EN); > + val = (adc_chan | PALMAS_GPADC_SW_SELECT_SW_CONV_EN); > + ret = palmas_update_bits(adc->palmas, PALMAS_GPADC_BASE, > + PALMAS_GPADC_SW_SELECT, mask, val); > + if (ret < 0) { > + dev_err(adc->dev, "SW_SELECT update failed: %d\n", ret); > + return ret; > + } > + } else { > + ret = palmas_write(adc->palmas, PALMAS_GPADC_BASE, > + PALMAS_GPADC_SW_SELECT, 0); > + if (ret < 0) > + dev_err(adc->dev, "SW_SELECT write failed: %d\n", ret); > + > + ret = palmas_update_bits(adc->palmas, PALMAS_GPADC_BASE, > + PALMAS_GPADC_CTRL1, > + PALMAS_GPADC_CTRL1_GPADC_FORCE, 0); > + if (ret < 0) { > + dev_err(adc->dev, "CTRL1 update failed: %d\n", ret); > + return ret; > + } > + } > + > + return ret; > +} > + > +static int palmas_gpadc_read_prepare(struct palmas_gpadc *adc, int adc_chan) > +{ > + int ret; > + > + ret = palmas_gpadc_enable(adc, adc_chan, true); > + if (ret < 0) > + return ret; > + > + return palmas_gpadc_start_mask_interrupt(adc, 0); > +} > + > +static void palmas_gpadc_read_done(struct palmas_gpadc *adc, int adc_chan) > +{ > + palmas_gpadc_start_mask_interrupt(adc, 1); > + palmas_gpadc_enable(adc, adc_chan, false); > +} > + > +static int palmas_gpadc_calibrate(struct palmas_gpadc *adc, int adc_chan) > +{ > + int k; > + int d1; > + int d2; > + int ret; > + int gain; > + int x1 = adc->adc_info[adc_chan].x1; > + int x2 = adc->adc_info[adc_chan].x2; > + int v1 = adc->adc_info[adc_chan].v1; > + int v2 = adc->adc_info[adc_chan].v2; > + > + ret = palmas_read(adc->palmas, PALMAS_TRIM_GPADC_BASE, > + adc->adc_info[adc_chan].trim1_reg, &d1); > + if (ret < 0) { > + dev_err(adc->dev, "TRIM read failed: %d\n", ret); > + goto scrub; > + } > + > + ret = palmas_read(adc->palmas, PALMAS_TRIM_GPADC_BASE, > + adc->adc_info[adc_chan].trim2_reg, &d2); > + if (ret < 0) { > + dev_err(adc->dev, "TRIM read failed: %d\n", ret); > + goto scrub; > + } > + > + /* gain error calculation */ > + k = (1000 + (1000 * (d2 - d1)) / (x2 - x1)); > + > + /* gain calculation */ > + gain = ((v2 - v1) * 1000) / (x2 - x1); > + > + adc->adc_info[adc_chan].gain_error = k; > + adc->adc_info[adc_chan].gain = gain; > + /* offset Calculation */ > + adc->adc_info[adc_chan].offset = (d1 * 1000) - ((k - 1000) * x1); > + > +scrub: > + return ret; > +} > + > +static int palmas_gpadc_start_conversion(struct palmas_gpadc *adc, int adc_chan) > +{ > + unsigned int val; > + int ret; > + > + init_completion(&adc->conv_completion); > + ret = palmas_update_bits(adc->palmas, PALMAS_GPADC_BASE, > + PALMAS_GPADC_SW_SELECT, > + PALMAS_GPADC_SW_SELECT_SW_START_CONV0, > + PALMAS_GPADC_SW_SELECT_SW_START_CONV0); > + if (ret < 0) { > + dev_err(adc->dev, "SELECT_SW_START write failed: %d\n", ret); > + return ret; > + } > + > + ret = wait_for_completion_timeout(&adc->conv_completion, > + PALMAS_ADC_CONVERSION_TIMEOUT); > + if (ret == 0) { > + dev_err(adc->dev, "conversion not completed\n"); > + return -ETIMEDOUT; > + } > + > + ret = palmas_bulk_read(adc->palmas, PALMAS_GPADC_BASE, > + PALMAS_GPADC_SW_CONV0_LSB, &val, 2); > + if (ret < 0) { > + dev_err(adc->dev, "SW_CONV0_LSB read failed: %d\n", ret); > + return ret; > + } > + > + ret = val & 0xFFF; > + > + return ret; > +} > + > +static int palmas_gpadc_get_calibrated_code(struct palmas_gpadc *adc, > + int adc_chan, int val) > +{ > + if (!adc->adc_info[adc_chan].is_uncalibrated) > + val = (val*1000 - adc->adc_info[adc_chan].offset) / > + adc->adc_info[adc_chan].gain_error; > + > + if (val < 0) { > + dev_err(adc->dev, "Mismatch with calibration\n"); > + return 0; > + } > + > + val = (val * adc->adc_info[adc_chan].gain) / 1000; > + > + return val; > +} > + > +static int palmas_gpadc_read_raw(struct iio_dev *indio_dev, > + struct iio_chan_spec const *chan, int *val, int *val2, long mask) > +{ > + struct palmas_gpadc *adc = iio_priv(indio_dev); > + int adc_chan = chan->channel; > + int ret = 0; > + > + if (adc_chan > PALMAS_ADC_CH_MAX) > + return -EINVAL; > + > + mutex_lock(&indio_dev->mlock); > + > + switch (mask) { > + case IIO_CHAN_INFO_RAW: > + case IIO_CHAN_INFO_PROCESSED: > + ret = palmas_gpadc_read_prepare(adc, adc_chan); > + if (ret < 0) > + goto out; > + > + ret = palmas_gpadc_start_conversion(adc, adc_chan); > + if (ret < 0) { > + dev_err(adc->dev, > + "ADC start conversion failed\n"); > + goto out; > + } > + > + if (mask == IIO_CHAN_INFO_PROCESSED) > + ret = palmas_gpadc_get_calibrated_code( > + adc, adc_chan, ret); > + > + *val = ret; > + > + ret = IIO_VAL_INT; > + goto out; > + } > + > + mutex_unlock(&indio_dev->mlock); > + return ret; > + > +out: > + palmas_gpadc_read_done(adc, adc_chan); > + mutex_unlock(&indio_dev->mlock); > + > + return ret; > +} > + > +static const struct iio_info palmas_gpadc_iio_info = { > + .read_raw = palmas_gpadc_read_raw, > + .driver_module = THIS_MODULE, > +}; > + > +#define PALMAS_ADC_CHAN_IIO(chan, _type, chan_info) \ > +{ \ > + .datasheet_name = PALMAS_DATASHEET_NAME(chan), \ > + .type = _type, \ > + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \ > + BIT(chan_info), \ > + .indexed = 1, \ > + .channel = PALMAS_ADC_CH_##chan, \ > +} > + > +static const struct iio_chan_spec palmas_gpadc_iio_channel[] = { > + PALMAS_ADC_CHAN_IIO(IN0, IIO_VOLTAGE, IIO_CHAN_INFO_PROCESSED), > + PALMAS_ADC_CHAN_IIO(IN1, IIO_TEMP, IIO_CHAN_INFO_RAW), > + PALMAS_ADC_CHAN_IIO(IN2, IIO_VOLTAGE, IIO_CHAN_INFO_PROCESSED), > + PALMAS_ADC_CHAN_IIO(IN3, IIO_TEMP, IIO_CHAN_INFO_RAW), > + PALMAS_ADC_CHAN_IIO(IN4, IIO_VOLTAGE, IIO_CHAN_INFO_PROCESSED), > + PALMAS_ADC_CHAN_IIO(IN5, IIO_VOLTAGE, IIO_CHAN_INFO_PROCESSED), > + PALMAS_ADC_CHAN_IIO(IN6, IIO_VOLTAGE, IIO_CHAN_INFO_PROCESSED), > + PALMAS_ADC_CHAN_IIO(IN7, IIO_VOLTAGE, IIO_CHAN_INFO_PROCESSED), > + PALMAS_ADC_CHAN_IIO(IN8, IIO_VOLTAGE, IIO_CHAN_INFO_PROCESSED), > + PALMAS_ADC_CHAN_IIO(IN9, IIO_VOLTAGE, IIO_CHAN_INFO_PROCESSED), > + PALMAS_ADC_CHAN_IIO(IN10, IIO_VOLTAGE, IIO_CHAN_INFO_PROCESSED), > + PALMAS_ADC_CHAN_IIO(IN11, IIO_VOLTAGE, IIO_CHAN_INFO_PROCESSED), > + PALMAS_ADC_CHAN_IIO(IN12, IIO_TEMP, IIO_CHAN_INFO_RAW), > + PALMAS_ADC_CHAN_IIO(IN13, IIO_TEMP, IIO_CHAN_INFO_RAW), > + PALMAS_ADC_CHAN_IIO(IN14, IIO_VOLTAGE, IIO_CHAN_INFO_PROCESSED), > + PALMAS_ADC_CHAN_IIO(IN15, IIO_VOLTAGE, IIO_CHAN_INFO_PROCESSED), > +}; > + > +static int palmas_gpadc_probe(struct platform_device *pdev) > +{ > + struct palmas_gpadc *adc; > + struct palmas_platform_data *pdata; > + struct palmas_gpadc_platform_data *gpadc_pdata = NULL; > + struct iio_dev *indio_dev; > + int ret, i; > + > + pdata = dev_get_platdata(pdev->dev.parent); > + if (!pdata || !pdata->gpadc_pdata) { > + dev_err(&pdev->dev, "No platform data\n"); > + return -ENODEV; > + } > + > + gpadc_pdata = pdata->gpadc_pdata; > + > + indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(*adc)); > + if (!indio_dev) { > + dev_err(&pdev->dev, "iio_device_alloc failed\n"); > + return -ENOMEM; > + } > + > + adc = iio_priv(indio_dev); > + adc->dev = &pdev->dev; > + adc->palmas = dev_get_drvdata(pdev->dev.parent); > + adc->adc_info = palmas_gpadc_info; > + init_completion(&adc->conv_completion); > + dev_set_drvdata(&pdev->dev, indio_dev); > + > + adc->auto_conversion_period = gpadc_pdata->auto_conversion_period_ms; > + adc->irq = palmas_irq_get_virq(adc->palmas, PALMAS_GPADC_EOC_SW_IRQ); > + if (adc->irq < 0) { > + dev_err(adc->dev, > + "get virq failed: %d\n", adc->irq); > + ret = adc->irq; > + goto out; > + } > + ret = request_threaded_irq(adc->irq, NULL, > + palmas_gpadc_irq, > + IRQF_ONESHOT | IRQF_EARLY_RESUME, dev_name(adc->dev), > + adc); > + if (ret < 0) { > + dev_err(adc->dev, > + "request irq %d failed: %d\n", adc->irq, ret); > + goto out; > + } > + > + if (gpadc_pdata->adc_wakeup1_data) { > + memcpy(&adc->wakeup1_data, gpadc_pdata->adc_wakeup1_data, > + sizeof(adc->wakeup1_data)); > + adc->wakeup1_enable = true; > + adc->irq_auto_0 = platform_get_irq(pdev, 1); > + ret = request_threaded_irq(adc->irq_auto_0, NULL, > + palmas_gpadc_irq_auto, > + IRQF_ONESHOT | IRQF_EARLY_RESUME, > + "palmas-adc-auto-0", adc); > + if (ret < 0) { > + dev_err(adc->dev, "request auto0 irq %d failed: %d\n", > + adc->irq_auto_0, ret); > + goto out_irq_free; > + } > + } > + > + if (gpadc_pdata->adc_wakeup2_data) { > + memcpy(&adc->wakeup2_data, gpadc_pdata->adc_wakeup2_data, > + sizeof(adc->wakeup2_data)); > + adc->wakeup2_enable = true; > + adc->irq_auto_1 = platform_get_irq(pdev, 2); > + ret = request_threaded_irq(adc->irq_auto_1, NULL, > + palmas_gpadc_irq_auto, > + IRQF_ONESHOT | IRQF_EARLY_RESUME, > + "palmas-adc-auto-1", adc); > + if (ret < 0) { > + dev_err(adc->dev, "request auto1 irq %d failed: %d\n", > + adc->irq_auto_1, ret); > + goto out_irq_auto0_free; > + } > + } > + > + /* set the current source 0 (value 0/5/15/20 uA => 0..3) */ > + if (gpadc_pdata->ch0_current <= 1) > + adc->ch0_current = PALMAS_ADC_CH0_CURRENT_SRC_0; > + else if (gpadc_pdata->ch0_current <= 5) > + adc->ch0_current = PALMAS_ADC_CH0_CURRENT_SRC_5; > + else if (gpadc_pdata->ch0_current <= 15) > + adc->ch0_current = PALMAS_ADC_CH0_CURRENT_SRC_15; > + else > + adc->ch0_current = PALMAS_ADC_CH0_CURRENT_SRC_20; > + > + /* set the current source 3 (value 0/10/400/800 uA => 0..3) */ > + if (gpadc_pdata->ch3_current <= 1) > + adc->ch3_current = PALMAS_ADC_CH3_CURRENT_SRC_0; > + else if (gpadc_pdata->ch3_current <= 10) > + adc->ch3_current = PALMAS_ADC_CH3_CURRENT_SRC_10; > + else if (gpadc_pdata->ch3_current <= 400) > + adc->ch3_current = PALMAS_ADC_CH3_CURRENT_SRC_400; > + else > + adc->ch3_current = PALMAS_ADC_CH3_CURRENT_SRC_800; > + > + adc->extended_delay = gpadc_pdata->extended_delay; > + > + indio_dev->name = MOD_NAME; > + indio_dev->dev.parent = &pdev->dev; > + indio_dev->info = &palmas_gpadc_iio_info; > + indio_dev->modes = INDIO_DIRECT_MODE; > + indio_dev->channels = palmas_gpadc_iio_channel; > + indio_dev->num_channels = ARRAY_SIZE(palmas_gpadc_iio_channel); > + > + ret = iio_device_register(indio_dev); > + if (ret < 0) { > + dev_err(adc->dev, "iio_device_register() failed: %d\n", ret); > + goto out_irq_auto1_free; > + } > + > + device_set_wakeup_capable(&pdev->dev, 1); > + for (i = 0; i < PALMAS_ADC_CH_MAX; i++) { > + if (!(adc->adc_info[i].is_uncalibrated)) > + palmas_gpadc_calibrate(adc, i); > + } > + > + if (adc->wakeup1_enable || adc->wakeup2_enable) > + device_wakeup_enable(&pdev->dev); > + > + return 0; > + > +out_irq_auto1_free: > + if (gpadc_pdata->adc_wakeup2_data) > + free_irq(adc->irq_auto_1, adc); > +out_irq_auto0_free: > + if (gpadc_pdata->adc_wakeup1_data) > + free_irq(adc->irq_auto_0, adc); > +out_irq_free: > + free_irq(adc->irq, adc); > +out: > + return ret; > +} > + > +static int palmas_gpadc_remove(struct platform_device *pdev) > +{ > + struct iio_dev *indio_dev = dev_to_iio_dev(&pdev->dev); > + struct palmas_gpadc *adc = iio_priv(indio_dev); > + > + if (adc->wakeup1_enable || adc->wakeup2_enable) > + device_wakeup_disable(&pdev->dev); > + iio_device_unregister(indio_dev); > + free_irq(adc->irq, adc); > + if (adc->wakeup1_enable) > + free_irq(adc->irq_auto_0, adc); > + if (adc->wakeup2_enable) > + free_irq(adc->irq_auto_1, adc); > + > + return 0; > +} > + > +#ifdef CONFIG_PM_SLEEP > +static int palmas_adc_wakeup_configure(struct palmas_gpadc *adc) > +{ > + int adc_period, conv; > + int i; > + int ch0 = 0, ch1 = 0; > + int thres; > + int ret; > + > + adc_period = adc->auto_conversion_period; > + for (i = 0; i < 16; ++i) { > + if (((1000 * (1 << i)) / 32) < adc_period) > + continue; > + } > + if (i > 0) > + i--; > + adc_period = i; > + ret = palmas_update_bits(adc->palmas, PALMAS_GPADC_BASE, > + PALMAS_GPADC_AUTO_CTRL, > + PALMAS_GPADC_AUTO_CTRL_COUNTER_CONV_MASK, > + adc_period); > + if (ret < 0) { > + dev_err(adc->dev, "AUTO_CTRL write failed: %d\n", ret); > + return ret; > + } > + > + conv = 0; > + if (adc->wakeup1_enable) { > + int polarity; > + > + ch0 = adc->wakeup1_data.adc_channel_number; > + conv |= PALMAS_GPADC_AUTO_CTRL_AUTO_CONV0_EN; > + if (adc->wakeup1_data.adc_high_threshold > 0) { > + thres = adc->wakeup1_data.adc_high_threshold; > + polarity = 0; > + } else { > + thres = adc->wakeup1_data.adc_low_threshold; > + polarity = PALMAS_GPADC_THRES_CONV0_MSB_THRES_CONV0_POL; > + } > + > + ret = palmas_write(adc->palmas, PALMAS_GPADC_BASE, > + PALMAS_GPADC_THRES_CONV0_LSB, thres & 0xFF); > + if (ret < 0) { > + dev_err(adc->dev, > + "THRES_CONV0_LSB write failed: %d\n", ret); > + return ret; > + } > + > + ret = palmas_write(adc->palmas, PALMAS_GPADC_BASE, > + PALMAS_GPADC_THRES_CONV0_MSB, > + ((thres >> 8) & 0xF) | polarity); > + if (ret < 0) { > + dev_err(adc->dev, > + "THRES_CONV0_MSB write failed: %d\n", ret); > + return ret; > + } > + } > + > + if (adc->wakeup2_enable) { > + int polarity; > + > + ch1 = adc->wakeup2_data.adc_channel_number; > + conv |= PALMAS_GPADC_AUTO_CTRL_AUTO_CONV1_EN; > + if (adc->wakeup2_data.adc_high_threshold > 0) { > + thres = adc->wakeup2_data.adc_high_threshold; > + polarity = 0; > + } else { > + thres = adc->wakeup2_data.adc_low_threshold; > + polarity = PALMAS_GPADC_THRES_CONV1_MSB_THRES_CONV1_POL; > + } > + > + ret = palmas_write(adc->palmas, PALMAS_GPADC_BASE, > + PALMAS_GPADC_THRES_CONV1_LSB, thres & 0xFF); > + if (ret < 0) { > + dev_err(adc->dev, > + "THRES_CONV1_LSB write failed: %d\n", ret); > + return ret; > + } > + > + ret = palmas_write(adc->palmas, PALMAS_GPADC_BASE, > + PALMAS_GPADC_THRES_CONV1_MSB, > + ((thres >> 8) & 0xF) | polarity); > + if (ret < 0) { > + dev_err(adc->dev, > + "THRES_CONV1_MSB write failed: %d\n", ret); > + return ret; > + } > + } > + > + ret = palmas_write(adc->palmas, PALMAS_GPADC_BASE, > + PALMAS_GPADC_AUTO_SELECT, (ch1 << 4) | ch0); > + if (ret < 0) { > + dev_err(adc->dev, "AUTO_SELECT write failed: %d\n", ret); > + return ret; > + } > + > + ret = palmas_update_bits(adc->palmas, PALMAS_GPADC_BASE, > + PALMAS_GPADC_AUTO_CTRL, > + PALMAS_GPADC_AUTO_CTRL_AUTO_CONV1_EN | > + PALMAS_GPADC_AUTO_CTRL_AUTO_CONV0_EN, conv); > + if (ret < 0) > + dev_err(adc->dev, "AUTO_CTRL write failed: %d\n", ret); > + > + return ret; > +} > + > +static int palmas_adc_wakeup_reset(struct palmas_gpadc *adc) > +{ > + int ret; > + > + ret = palmas_write(adc->palmas, PALMAS_GPADC_BASE, > + PALMAS_GPADC_AUTO_SELECT, 0); > + if (ret < 0) { > + dev_err(adc->dev, "AUTO_SELECT write failed: %d\n", ret); > + return ret; > + } > + > + ret = palmas_disable_auto_conversion(adc); > + if (ret < 0) > + dev_err(adc->dev, "Disable auto conversion failed: %d\n", ret); > + > + return ret; > +} > + > +static int palmas_gpadc_suspend(struct device *dev) > +{ > + struct iio_dev *indio_dev = dev_to_iio_dev(dev); > + struct palmas_gpadc *adc = iio_priv(indio_dev); > + int wakeup = adc->wakeup1_enable || adc->wakeup2_enable; > + int ret; > + > + if (!device_may_wakeup(dev) || !wakeup) > + return 0; > + > + ret = palmas_adc_wakeup_configure(adc); > + if (ret < 0) > + return ret; > + > + if (adc->wakeup1_enable) > + enable_irq_wake(adc->irq_auto_0); > + > + if (adc->wakeup2_enable) > + enable_irq_wake(adc->irq_auto_1); > + > + return 0; > +} > + > +static int palmas_gpadc_resume(struct device *dev) > +{ > + struct iio_dev *indio_dev = dev_to_iio_dev(dev); > + struct palmas_gpadc *adc = iio_priv(indio_dev); > + int wakeup = adc->wakeup1_enable || adc->wakeup2_enable; > + int ret; > + > + if (!device_may_wakeup(dev) || !wakeup) > + return 0; > + > + ret = palmas_adc_wakeup_reset(adc); > + if (ret < 0) > + return ret; > + > + if (adc->wakeup1_enable) > + disable_irq_wake(adc->irq_auto_0); > + > + if (adc->wakeup2_enable) > + disable_irq_wake(adc->irq_auto_1); > + > + return 0; > +}; > +#endif > + > +static const struct dev_pm_ops palmas_pm_ops = { > + SET_SYSTEM_SLEEP_PM_OPS(palmas_gpadc_suspend, > + palmas_gpadc_resume) > +}; > + > +static struct platform_driver palmas_gpadc_driver = { > + .probe = palmas_gpadc_probe, > + .remove = palmas_gpadc_remove, > + .driver = { > + .name = MOD_NAME, > + .owner = THIS_MODULE, > + .pm = &palmas_pm_ops, > + }, > +}; > + > +static int __init palmas_gpadc_init(void) > +{ > + return platform_driver_register(&palmas_gpadc_driver); > +} > +module_init(palmas_gpadc_init); > + > +static void __exit palmas_gpadc_exit(void) > +{ > + platform_driver_unregister(&palmas_gpadc_driver); > +} > +module_exit(palmas_gpadc_exit); > + > +MODULE_DESCRIPTION("palmas GPADC driver"); > +MODULE_AUTHOR("Pradeep Goudagunta<pgoudagunta@xxxxxxxxxx>"); > +MODULE_ALIAS("platform:palmas-gpadc"); > +MODULE_LICENSE("GPL v2"); > diff --git a/include/linux/mfd/palmas.h b/include/linux/mfd/palmas.h > index bb270bd..2fcd70e 100644 > --- a/include/linux/mfd/palmas.h > +++ b/include/linux/mfd/palmas.h > @@ -133,21 +133,32 @@ struct palmas_pmic_driver_data { > struct regulator_config config); > }; > > +struct palmas_adc_wakeup_property { > + int adc_channel_number; > + int adc_high_threshold; > + int adc_low_threshold; > +}; > + > struct palmas_gpadc_platform_data { > /* Channel 3 current source is only enabled during conversion */ > - int ch3_current; > + int ch3_current; /* 0: off; 1: 10uA; 2: 400uA; 3: 800 uA */ > > /* Channel 0 current source can be used for battery detection. > * If used for battery detection this will cause a permanent current > * consumption depending on current level set here. > */ > - int ch0_current; > + int ch0_current; /* 0: off; 1: 5uA; 2: 15uA; 3: 20 uA */ > + bool extended_delay; /* use extended delay for conversion */ > > /* default BAT_REMOVAL_DAT setting on device probe */ > int bat_removal; > > /* Sets the START_POLARITY bit in the RT_CTRL register */ > int start_polarity; > + > + int auto_conversion_period_ms; > + struct palmas_adc_wakeup_property *adc_wakeup1_data; > + struct palmas_adc_wakeup_property *adc_wakeup2_data; > }; > > struct palmas_reg_init { > @@ -404,28 +415,7 @@ struct palmas_gpadc_calibration { > s32 offset_error; > }; > > -struct palmas_gpadc { > - struct device *dev; > - struct palmas *palmas; > - > - int ch3_current; > - int ch0_current; > - > - int gpadc_force; > - > - int bat_removal; > - > - struct mutex reading_lock; > - struct completion irq_complete; > - > - int eoc_sw_irq; > - > - struct palmas_gpadc_calibration *palmas_cal_tbl; > - > - int conv0_channel; > - int conv1_channel; > - int rt_channel; > -}; > +#define PALMAS_DATASHEET_NAME(_name) "palmas-gpadc-chan-"#_name > > struct palmas_gpadc_result { > s32 raw_code; > @@ -519,6 +509,43 @@ enum palmas_irqs { > PALMAS_NUM_IRQ, > }; > > +/* Palmas GPADC Channels */ > +enum { > + PALMAS_ADC_CH_IN0, > + PALMAS_ADC_CH_IN1, > + PALMAS_ADC_CH_IN2, > + PALMAS_ADC_CH_IN3, > + PALMAS_ADC_CH_IN4, > + PALMAS_ADC_CH_IN5, > + PALMAS_ADC_CH_IN6, > + PALMAS_ADC_CH_IN7, > + PALMAS_ADC_CH_IN8, > + PALMAS_ADC_CH_IN9, > + PALMAS_ADC_CH_IN10, > + PALMAS_ADC_CH_IN11, > + PALMAS_ADC_CH_IN12, > + PALMAS_ADC_CH_IN13, > + PALMAS_ADC_CH_IN14, > + PALMAS_ADC_CH_IN15, > + PALMAS_ADC_CH_MAX, > +}; > + > +/* Palmas GPADC Channel0 Current Source */ > +enum { > + PALMAS_ADC_CH0_CURRENT_SRC_0, > + PALMAS_ADC_CH0_CURRENT_SRC_5, > + PALMAS_ADC_CH0_CURRENT_SRC_15, > + PALMAS_ADC_CH0_CURRENT_SRC_20, > +}; > + > +/* Palmas GPADC Channel3 Current Source */ > +enum { > + PALMAS_ADC_CH3_CURRENT_SRC_0, > + PALMAS_ADC_CH3_CURRENT_SRC_10, > + PALMAS_ADC_CH3_CURRENT_SRC_400, > + PALMAS_ADC_CH3_CURRENT_SRC_800, > +}; > + > struct palmas_pmic { > struct palmas *palmas; > struct device *dev; > -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
