On Wed, 03 Apr 2019, Bartosz Golaszewski wrote: > From: Bartosz Golaszewski <bgolaszewski@xxxxxxxxxxxx> > > Add the core mfd driver for max77650 PMIC. We define five sub-devices > for which the drivers will be added in subsequent patches. > > Signed-off-by: Bartosz Golaszewski <bgolaszewski@xxxxxxxxxxxx> > --- > drivers/mfd/Kconfig | 14 +++ > drivers/mfd/Makefile | 1 + > drivers/mfd/max77650.c | 234 +++++++++++++++++++++++++++++++++++ > include/linux/mfd/max77650.h | 59 +++++++++ > 4 files changed, 308 insertions(+) > create mode 100644 drivers/mfd/max77650.c > create mode 100644 include/linux/mfd/max77650.h > > diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig > index 0ce2d8dfc5f1..ade04e124aa0 100644 > --- a/drivers/mfd/Kconfig > +++ b/drivers/mfd/Kconfig > @@ -733,6 +733,20 @@ config MFD_MAX77620 > provides common support for accessing the device; additional drivers > must be enabled in order to use the functionality of the device. > > +config MFD_MAX77650 > + tristate "Maxim MAX77650/77651 PMIC Support" > + depends on I2C > + depends on OF || COMPILE_TEST > + select MFD_CORE > + select REGMAP_I2C > + help > + Say Y here to add support for Maxim Semiconductor MAX77650 and > + MAX77651 Power Management ICs. This is the core multifunction > + driver for interacting with the device. The module name is > + 'max77650'. Additional drivers can be enabled in order to use > + the following functionalities of the device: GPIO, regulator, > + charger, LED, onkey. > + > config MFD_MAX77686 > tristate "Maxim Semiconductor MAX77686/802 PMIC Support" > depends on I2C > diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile > index b4569ed7f3f3..5727d099c16f 100644 > --- a/drivers/mfd/Makefile > +++ b/drivers/mfd/Makefile > @@ -155,6 +155,7 @@ obj-$(CONFIG_MFD_DA9150) += da9150-core.o > > obj-$(CONFIG_MFD_MAX14577) += max14577.o > obj-$(CONFIG_MFD_MAX77620) += max77620.o > +obj-$(CONFIG_MFD_MAX77650) += max77650.o > obj-$(CONFIG_MFD_MAX77686) += max77686.o > obj-$(CONFIG_MFD_MAX77693) += max77693.o > obj-$(CONFIG_MFD_MAX77843) += max77843.o > diff --git a/drivers/mfd/max77650.c b/drivers/mfd/max77650.c > new file mode 100644 > index 000000000000..7a6c0a5cf602 > --- /dev/null > +++ b/drivers/mfd/max77650.c > @@ -0,0 +1,234 @@ > +// SPDX-License-Identifier: GPL-2.0 > +// > +// Copyright (C) 2018 BayLibre SAS > +// Author: Bartosz Golaszewski <bgolaszewski@xxxxxxxxxxxx> > +// > +// Core MFD driver for MAXIM 77650/77651 charger/power-supply. > +// Programming manual: https://pdfserv.maximintegrated.com/en/an/AN6428.pdf > + > +#include <linux/i2c.h> > +#include <linux/interrupt.h> > +#include <linux/irq.h> > +#include <linux/mfd/core.h> > +#include <linux/mfd/max77650.h> > +#include <linux/module.h> > +#include <linux/of.h> > +#include <linux/regmap.h> > + > +#define MAX77650_INT_GPI_F_MSK BIT(0) > +#define MAX77650_INT_GPI_R_MSK BIT(1) > +#define MAX77650_INT_GPI_MSK \ > + (MAX77650_INT_GPI_F_MSK | MAX77650_INT_GPI_R_MSK) > +#define MAX77650_INT_nEN_F_MSK BIT(2) > +#define MAX77650_INT_nEN_R_MSK BIT(3) > +#define MAX77650_INT_TJAL1_R_MSK BIT(4) > +#define MAX77650_INT_TJAL2_R_MSK BIT(5) > +#define MAX77650_INT_DOD_R_MSK BIT(6) > + > +#define MAX77650_INT_THM_MSK BIT(0) > +#define MAX77650_INT_CHG_MSK BIT(1) > +#define MAX77650_INT_CHGIN_MSK BIT(2) > +#define MAX77650_INT_TJ_REG_MSK BIT(3) > +#define MAX77650_INT_CHGIN_CTRL_MSK BIT(4) > +#define MAX77650_INT_SYS_CTRL_MSK BIT(5) > +#define MAX77650_INT_SYS_CNFG_MSK BIT(6) > + > +#define MAX77650_INT_GLBL_OFFSET 0 > +#define MAX77650_INT_CHG_OFFSET 1 > + > +#define MAX77650_SBIA_LPM_MASK BIT(5) > +#define MAX77650_SBIA_LPM_DISABLED 0x00 > + > +enum { > + MAX77650_INT_GPI, > + MAX77650_INT_nEN_F, > + MAX77650_INT_nEN_R, > + MAX77650_INT_TJAL1_R, > + MAX77650_INT_TJAL2_R, > + MAX77650_INT_DOD_R, > + MAX77650_INT_THM, > + MAX77650_INT_CHG, > + MAX77650_INT_CHGIN, > + MAX77650_INT_TJ_REG, > + MAX77650_INT_CHGIN_CTRL, > + MAX77650_INT_SYS_CTRL, > + MAX77650_INT_SYS_CNFG, > +}; > + > +static const struct resource max77650_charger_resources[] = { > + DEFINE_RES_IRQ_NAMED(MAX77650_INT_CHG, "CHG"), > + DEFINE_RES_IRQ_NAMED(MAX77650_INT_CHGIN, "CHGIN"), > +}; > + > +static const struct resource max77650_gpio_resources[] = { > + DEFINE_RES_IRQ_NAMED(MAX77650_INT_GPI, "GPI"), > +}; > + > +static const struct resource max77650_onkey_resources[] = { > + DEFINE_RES_IRQ_NAMED(MAX77650_INT_nEN_F, "nEN_F"), > + DEFINE_RES_IRQ_NAMED(MAX77650_INT_nEN_R, "nEN_R"), > +}; > + > +static const struct mfd_cell max77650_cells[] = { > + { > + .name = "max77650-regulator", > + .of_compatible = "maxim,max77650-regulator", > + }, > + { Nit: Place these all on the same line, like: }, { > + .name = "max77650-charger", > + .of_compatible = "maxim,max77650-charger", > + .resources = max77650_charger_resources, > + .num_resources = ARRAY_SIZE(max77650_charger_resources), > + }, > + { > + .name = "max77650-gpio", > + .of_compatible = "maxim,max77650-gpio", > + .resources = max77650_gpio_resources, > + .num_resources = ARRAY_SIZE(max77650_gpio_resources), > + }, > + { > + .name = "max77650-led", > + .of_compatible = "maxim,max77650-led", > + }, > + { > + .name = "max77650-onkey", > + .of_compatible = "maxim,max77650-onkey", > + .resources = max77650_onkey_resources, > + .num_resources = ARRAY_SIZE(max77650_onkey_resources), > + }, > +}; > + > +static const struct regmap_irq max77650_irqs[] = { > + [MAX77650_INT_GPI] = { > + .reg_offset = MAX77650_INT_GLBL_OFFSET, > + .mask = MAX77650_INT_GPI_MSK, > + .type = { > + .type_falling_val = MAX77650_INT_GPI_F_MSK, > + .type_rising_val = MAX77650_INT_GPI_R_MSK, > + .types_supported = IRQ_TYPE_EDGE_BOTH, Not really a fan of these silly double/triple tabs everywhere. I like a straight line as much as anyone, but I'd probably remove them from here. > + }, > + }, > + REGMAP_IRQ_REG(MAX77650_INT_nEN_F, > + MAX77650_INT_GLBL_OFFSET, MAX77650_INT_nEN_F_MSK), > + REGMAP_IRQ_REG(MAX77650_INT_nEN_R, > + MAX77650_INT_GLBL_OFFSET, MAX77650_INT_nEN_R_MSK), > + REGMAP_IRQ_REG(MAX77650_INT_TJAL1_R, > + MAX77650_INT_GLBL_OFFSET, MAX77650_INT_TJAL1_R_MSK), > + REGMAP_IRQ_REG(MAX77650_INT_TJAL2_R, > + MAX77650_INT_GLBL_OFFSET, MAX77650_INT_TJAL2_R_MSK), > + REGMAP_IRQ_REG(MAX77650_INT_DOD_R, > + MAX77650_INT_GLBL_OFFSET, MAX77650_INT_DOD_R_MSK), > + REGMAP_IRQ_REG(MAX77650_INT_THM, > + MAX77650_INT_CHG_OFFSET, MAX77650_INT_THM_MSK), > + REGMAP_IRQ_REG(MAX77650_INT_CHG, > + MAX77650_INT_CHG_OFFSET, MAX77650_INT_CHG_MSK), > + REGMAP_IRQ_REG(MAX77650_INT_CHGIN, > + MAX77650_INT_CHG_OFFSET, MAX77650_INT_CHGIN_MSK), > + REGMAP_IRQ_REG(MAX77650_INT_TJ_REG, > + MAX77650_INT_CHG_OFFSET, MAX77650_INT_TJ_REG_MSK), > + REGMAP_IRQ_REG(MAX77650_INT_CHGIN_CTRL, > + MAX77650_INT_CHG_OFFSET, MAX77650_INT_CHGIN_CTRL_MSK), > + REGMAP_IRQ_REG(MAX77650_INT_SYS_CTRL, > + MAX77650_INT_CHG_OFFSET, MAX77650_INT_SYS_CTRL_MSK), > + REGMAP_IRQ_REG(MAX77650_INT_SYS_CNFG, > + MAX77650_INT_CHG_OFFSET, MAX77650_INT_SYS_CNFG_MSK), > +}; > + > +static const struct regmap_irq_chip max77650_irq_chip = { > + .name = "max77650-irq", > + .irqs = max77650_irqs, > + .num_irqs = ARRAY_SIZE(max77650_irqs), > + .num_regs = 2, > + .status_base = MAX77650_REG_INT_GLBL, > + .mask_base = MAX77650_REG_INTM_GLBL, > + .type_in_mask = true, > + .type_invert = true, > + .init_ack_masked = true, > + .clear_on_unmask = true, > +}; > + > +static const struct regmap_config max77650_regmap_config = { > + .name = "max77650", > + .reg_bits = 8, > + .val_bits = 8, > +}; > + > +static int max77650_i2c_probe(struct i2c_client *i2c) > +{ > + struct regmap_irq_chip_data *irq_data; > + struct device *dev = &i2c->dev; > + struct irq_domain *domain; > + struct regmap *map; > + unsigned int val; > + int rv; > + > + map = devm_regmap_init_i2c(i2c, &max77650_regmap_config); > + if (IS_ERR(map)) { > + dev_err(dev, "unable to initialize i2c regmap\n"); "Unable to initialise I2C Regmap" > + return PTR_ERR(map); > + } > + > + rv = regmap_read(map, MAX77650_REG_CID, &val); > + if (rv) { > + dev_err(dev, "unable to read the CID from device\n"); "Unable to read Chip ID" > + return rv; > + } > + > + switch (MAX77650_CID_BITS(val)) { > + case MAX77650_CID_77650A: > + case MAX77650_CID_77650C: > + case MAX77650_CID_77651A: > + case MAX77650_CID_77651B: > + break; > + default: So you're exiting silently here. What is the user going to think? "Chip not supported - ID: %d" > + return -ENODEV; > + } > + > + /* > + * This IC has a low-power mode which reduces the quiescent current > + * consumption to ~5.6uA but is only suitable for systems consuming > + * less than ~2mA. Since this is not likely the case even on > + * linux-based wearables - keep the chip in normal power mode. > + */ > + rv = regmap_update_bits(map, > + MAX77650_REG_CNFG_GLBL, > + MAX77650_SBIA_LPM_MASK, > + MAX77650_SBIA_LPM_DISABLED); > + if (rv) { > + dev_err(dev, "unable to change the power mode\n"); "Unable ..." > + return rv; > + } > + > + rv = devm_regmap_add_irq_chip(dev, map, i2c->irq, > + IRQF_ONESHOT | IRQF_SHARED, 0, > + &max77650_irq_chip, &irq_data); > + if (rv) { > + dev_err(dev, "unable to add the regmap irq chip\n"); "Unable to add Regmap IRQ chip" > + return rv; > + } > + > + domain = regmap_irq_get_domain(irq_data); No error checking? > + return devm_mfd_add_devices(dev, PLATFORM_DEVID_NONE, > + max77650_cells, ARRAY_SIZE(max77650_cells), > + NULL, 0, domain); > +} > + > +static const struct of_device_id max77650_of_match[] = { > + { .compatible = "maxim,max77650" }, > + { } > +}; > +MODULE_DEVICE_TABLE(of, max77650_of_match); > + > +static struct i2c_driver max77650_i2c_driver = { > + .driver = { > + .name = "max77650", > + .of_match_table = of_match_ptr(max77650_of_match), > + }, > + .probe_new = max77650_i2c_probe, I wrote this years ago. Hasn't it gone away yet? > +}; > +module_i2c_driver(max77650_i2c_driver); > + > +MODULE_DESCRIPTION("MAXIM 77650/77651 multi-function core driver"); > +MODULE_AUTHOR("Bartosz Golaszewski <bgolaszewski@xxxxxxxxxxxx>"); > +MODULE_LICENSE("GPL v2"); > diff --git a/include/linux/mfd/max77650.h b/include/linux/mfd/max77650.h > new file mode 100644 > index 000000000000..c809e211a8cd > --- /dev/null > +++ b/include/linux/mfd/max77650.h > @@ -0,0 +1,59 @@ > +/* SPDX-License-Identifier: GPL-2.0 */ > +/* > + * Copyright (C) 2018 BayLibre SAS > + * Author: Bartosz Golaszewski <bgolaszewski@xxxxxxxxxxxx> > + * > + * Common definitions for MAXIM 77650/77651 charger/power-supply. > + */ > + > +#ifndef MAX77650_H > +#define MAX77650_H > + > +#include <linux/bits.h> > + > +#define MAX77650_REG_INT_GLBL 0x00 > +#define MAX77650_REG_INT_CHG 0x01 > +#define MAX77650_REG_STAT_CHG_A 0x02 > +#define MAX77650_REG_STAT_CHG_B 0x03 > +#define MAX77650_REG_ERCFLAG 0x04 > +#define MAX77650_REG_STAT_GLBL 0x05 > +#define MAX77650_REG_INTM_GLBL 0x06 > +#define MAX77650_REG_INTM_CHG 0x07 > +#define MAX77650_REG_CNFG_GLBL 0x10 > +#define MAX77650_REG_CID 0x11 > +#define MAX77650_REG_CNFG_GPIO 0x12 > +#define MAX77650_REG_CNFG_CHG_A 0x18 > +#define MAX77650_REG_CNFG_CHG_B 0x19 > +#define MAX77650_REG_CNFG_CHG_C 0x1a > +#define MAX77650_REG_CNFG_CHG_D 0x1b > +#define MAX77650_REG_CNFG_CHG_E 0x1c > +#define MAX77650_REG_CNFG_CHG_F 0x1d > +#define MAX77650_REG_CNFG_CHG_G 0x1e > +#define MAX77650_REG_CNFG_CHG_H 0x1f > +#define MAX77650_REG_CNFG_CHG_I 0x20 > +#define MAX77650_REG_CNFG_SBB_TOP 0x28 > +#define MAX77650_REG_CNFG_SBB0_A 0x29 > +#define MAX77650_REG_CNFG_SBB0_B 0x2a > +#define MAX77650_REG_CNFG_SBB1_A 0x2b > +#define MAX77650_REG_CNFG_SBB1_B 0x2c > +#define MAX77650_REG_CNFG_SBB2_A 0x2d > +#define MAX77650_REG_CNFG_SBB2_B 0x2e > +#define MAX77650_REG_CNFG_LDO_A 0x38 > +#define MAX77650_REG_CNFG_LDO_B 0x39 > +#define MAX77650_REG_CNFG_LED0_A 0x40 > +#define MAX77650_REG_CNFG_LED1_A 0x41 > +#define MAX77650_REG_CNFG_LED2_A 0x42 > +#define MAX77650_REG_CNFG_LED0_B 0x43 > +#define MAX77650_REG_CNFG_LED1_B 0x44 > +#define MAX77650_REG_CNFG_LED2_B 0x45 > +#define MAX77650_REG_CNFG_LED_TOP 0x46 > + > +#define MAX77650_CID_MASK GENMASK(3, 0) > +#define MAX77650_CID_BITS(_reg) (_reg & MAX77650_CID_MASK) > + > +#define MAX77650_CID_77650A 0x03 > +#define MAX77650_CID_77650C 0x0a > +#define MAX77650_CID_77651A 0x06 > +#define MAX77650_CID_77651B 0x08 > + > +#endif /* MAX77650_H */ -- Lee Jones [李琼斯] Linaro Services Technical Lead Linaro.org │ Open source software for ARM SoCs Follow Linaro: Facebook | Twitter | Blog
