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Date: Fri, 29 Jan 2016 09:06:32 +0000
From: Lee Jones <lee.jones@...aro.org>
To: Laxman Dewangan <ldewangan@...dia.com>
Cc: robh+dt@...nel.org, pawel.moll@....com, mark.rutland@....com,
ijc+devicetree@...lion.org.uk, galak@...eaurora.org,
linus.walleij@...aro.org, gnurou@...il.com, broonie@...nel.org,
a.zummo@...ertech.it, alexandre.belloni@...e-electrons.com,
lgirdwood@...il.com, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-gpio@...r.kernel.org,
rtc-linux@...glegroups.com, swarren@...dia.com, treding@...dia.com,
k.kozlowski@...sung.com, Chaitanya Bandi <bandik@...dia.com>,
Mallikarjun Kasoju <mkasoju@...dia.com>
Subject: Re: [PATCH V6 2/8] mfd: max77620: add core driver for
MAX77620/MAX20024
On Thu, 28 Jan 2016, Laxman Dewangan wrote:
> MAX77620/MAX20024 are Power Management IC from the MAXIM.
> It supports RTC, multiple GPIOs, multiple DCDC and LDOs,
> watchdog, clock etc.
>
> Add MFD drier to provides common support for accessing the
> device; additional drivers is developed on respected subsystem
> in order to use the functionality of the device.
>
> Signed-off-by: Laxman Dewangan <ldewangan@...dia.com>
> Signed-off-by: Chaitanya Bandi <bandik@...dia.com>
> Signed-off-by: Mallikarjun Kasoju <mkasoju@...dia.com>
> Reviewed-by: Krzysztof Kozlowski <k.kozlowski@...sung.com>
> ---
> Changes from V1:
> - Code cleanups per review from V1.
> - Move register acccess APIs from header to c file.
> - Remove some of non required variable, remove duplication in error message
> and simplify some of function implementation.
> - Register RTC driver such that it can get the regmap handle form parent device
>
> Changes from V2:
> - Run coccicheck and checkpatch in strict mode for the alignment.
> - Drop RTC driver and its i2c client registration.
>
> Changes from V3:
> - Change all sys initcall to module driver.
> - change the max77620_read argument to unisgned int from u8.
>
> Changes from V4:
> - Take care of fps nodes.
> - Drop the battery charger and low battery binding and related code as
> it need to go on power driver.
> Changes from V5:
> -None
>
> drivers/mfd/Kconfig | 15 +
> drivers/mfd/Makefile | 1 +
> drivers/mfd/max77620.c | 727 +++++++++++++++++++++++++++++++++++++++++++
> include/linux/mfd/max77620.h | 406 ++++++++++++++++++++++++
> 4 files changed, 1149 insertions(+)
> create mode 100644 drivers/mfd/max77620.c
> create mode 100644 include/linux/mfd/max77620.h
>
> diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
> index 9ca66de..e5ad974 100644
> --- a/drivers/mfd/Kconfig
> +++ b/drivers/mfd/Kconfig
> @@ -492,6 +492,21 @@ config MFD_MAX14577
> additional drivers must be enabled in order to use the functionality
> of the device.
>
> +config MFD_MAX77620
> + bool "Maxim Semiconductor MAX77620 and MAX20024 PMIC Support"
> + depends on I2C=y
> + depends on OF
> + select MFD_CORE
> + select REGMAP_I2C
> + select REGMAP_IRQ
> + select IRQ_DOMAIN
> + help
> + Say yes here to add support for Maxim Semiconductor MAX77620 and
> + MAX20024 which are Power Management IC with General purpose pins,
> + RTC, regulators, clock generator, watchdog etc. This driver
> + provides common support for accessing the device; additional drivers
> + must be enabled in order to use the functionality of the device.
> +
> config MFD_MAX77686
> bool "Maxim Semiconductor MAX77686/802 PMIC Support"
> depends on I2C=y
> diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
> index 0f230a6..97910ed 100644
> --- a/drivers/mfd/Makefile
> +++ b/drivers/mfd/Makefile
> @@ -123,6 +123,7 @@ obj-$(CONFIG_MFD_DA9063) += da9063.o
> obj-$(CONFIG_MFD_DA9150) += da9150-core.o
>
> obj-$(CONFIG_MFD_MAX14577) += max14577.o
> +obj-$(CONFIG_MFD_MAX77620) += max77620.o
> obj-$(CONFIG_MFD_MAX77686) += max77686.o
> obj-$(CONFIG_MFD_MAX77693) += max77693.o
> obj-$(CONFIG_MFD_MAX77843) += max77843.o
> diff --git a/drivers/mfd/max77620.c b/drivers/mfd/max77620.c
> new file mode 100644
> index 0000000..49318c3
> --- /dev/null
> +++ b/drivers/mfd/max77620.c
> @@ -0,0 +1,727 @@
> +/*
> + * Maxim MAX77620 MFD Driver
> + *
> + * Copyright (C) 2016 NVIDIA CORPORATION. All rights reserved.
> + *
> + * Author:
> + * Laxman Dewangan <ldewangan@...dia.com>
> + * Chaitanya Bandi <bandik@...dia.com>
> + * Mallikarjun Kasoju <mkasoju@...dia.com>
> + *
> + * This program is free software; you can redistribute it and/or modify it
> + * under the terms and conditions of the GNU General Public License,
> + * version 2, as published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope 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.
> + */
Can you use the shorter version?
> +#include <linux/module.h>
> +#include <linux/i2c.h>
> +#include <linux/slab.h>
> +#include <linux/mfd/core.h>
> +#include <linux/interrupt.h>
> +#include <linux/regmap.h>
> +#include <linux/of.h>
> +#include <linux/of_device.h>
> +#include <linux/mfd/max77620.h>
Alphabetical.
> +static const char *of_max77620_fps_node_name[MAX77620_FPS_COUNT] = {
> + "fps0",
> + "fps1",
> + "fps2"
> +};
No need for this arrray. Just use '"fps%d", i' in the for loop below.
> +static struct resource gpio_resources[] = {
> + {
> + .start = MAX77620_IRQ_TOP_GPIO,
> + .end = MAX77620_IRQ_TOP_GPIO,
> + .flags = IORESOURCE_IRQ,
> + }
> +};
> +
> +static struct resource power_resources[] = {
> + {
> + .start = MAX77620_IRQ_LBT_MBATLOW,
> + .end = MAX77620_IRQ_LBT_MBATLOW,
> + .flags = IORESOURCE_IRQ,
> + }
> +};
> +
> +static struct resource rtc_resources[] = {
> + {
> + .start = MAX77620_IRQ_TOP_RTC,
> + .end = MAX77620_IRQ_TOP_RTC,
> + .flags = IORESOURCE_IRQ,
> + }
> +};
> +
> +static struct resource thermal_resources[] = {
> + {
> + .start = MAX77620_IRQ_LBT_TJALRM1,
> + .end = MAX77620_IRQ_LBT_TJALRM1,
> + .flags = IORESOURCE_IRQ,
> + },
> + {
> + .start = MAX77620_IRQ_LBT_TJALRM2,
> + .end = MAX77620_IRQ_LBT_TJALRM2,
> + .flags = IORESOURCE_IRQ,
> + }
> +};
Simplify all of these by using the DEFINE_RES_* defines.
> +static const struct regmap_irq max77620_top_irqs[] = {
> + [MAX77620_IRQ_TOP_GLBL] = {
> + .mask = MAX77620_IRQ_TOP_GLBL_MASK,
> + .reg_offset = 0,
> + },
> + [MAX77620_IRQ_TOP_SD] = {
> + .mask = MAX77620_IRQ_TOP_SD_MASK,
> + .reg_offset = 0,
> + },
> + [MAX77620_IRQ_TOP_LDO] = {
> + .mask = MAX77620_IRQ_TOP_LDO_MASK,
> + .reg_offset = 0,
> + },
> + [MAX77620_IRQ_TOP_GPIO] = {
> + .mask = MAX77620_IRQ_TOP_GPIO_MASK,
> + .reg_offset = 0,
> + },
> + [MAX77620_IRQ_TOP_RTC] = {
> + .mask = MAX77620_IRQ_TOP_RTC_MASK,
> + .reg_offset = 0,
> + },
> + [MAX77620_IRQ_TOP_32K] = {
> + .mask = MAX77620_IRQ_TOP_32K_MASK,
> + .reg_offset = 0,
> + },
> + [MAX77620_IRQ_TOP_ONOFF] = {
> + .mask = MAX77620_IRQ_TOP_ONOFF_MASK,
> + .reg_offset = 0,
> + },
> +
> + [MAX77620_IRQ_LBT_MBATLOW] = {
> + .mask = MAX77620_IRQ_LBM_MASK,
> + .reg_offset = 1,
> + },
> + [MAX77620_IRQ_LBT_TJALRM1] = {
> + .mask = MAX77620_IRQ_TJALRM1_MASK,
> + .reg_offset = 1,
> + },
> + [MAX77620_IRQ_LBT_TJALRM2] = {
> + .mask = MAX77620_IRQ_TJALRM2_MASK,
> + .reg_offset = 1,
> + },
> +
> +};
Please simply by using REGMAP_IRQ_REG().
> +#define MAX77620_SUB_MODULE_RES(_name, _id) \
> + [_id] = { \
> + .name = "max77620-"#_name, \
> + .num_resources = ARRAY_SIZE(_name##_resources), \
> + .resources = &_name##_resources[0], \
> + .id = _id, \
> + }
> +
> +#define MAX20024_SUB_MODULE_RES(_name, _id) \
> + [_id] = { \
> + .name = "max20024-"#_name, \
> + .num_resources = ARRAY_SIZE(_name##_resources), \
> + .resources = &_name##_resources[0], \
> + .id = _id, \
> + }
> +
> +#define MAX77620_SUB_MODULE_NO_RES(_name, _id) \
> + [_id] = { \
> + .name = "max77620-"#_name, \
> + .id = _id, \
> + }
> +
> +#define MAX20024_SUB_MODULE_NO_RES(_name, _id) \
> + [_id] = { \
> + .name = "max20024-"#_name, \
> + .id = _id, \
> + }
I don't want people hand-rolling this stuff. If it's useful to you,
it's useful to others, so great a generic implementation that lives in
the kernel headers directory.
> +static struct mfd_cell max77620_children[] = {
> + MAX77620_SUB_MODULE_NO_RES(pinctrl, 0),
> + MAX77620_SUB_MODULE_RES(gpio, 1),
> + MAX77620_SUB_MODULE_NO_RES(pmic, 2),
> + MAX77620_SUB_MODULE_RES(rtc, 3),
> + MAX77620_SUB_MODULE_RES(power, 4),
> + MAX77620_SUB_MODULE_NO_RES(wdt, 5),
> + MAX77620_SUB_MODULE_NO_RES(clk, 6),
> + MAX77620_SUB_MODULE_RES(thermal, 7),
For what purpose are you id'ing these manually?
> +};
> +
> +static struct mfd_cell max20024_children[] = {
> + MAX20024_SUB_MODULE_NO_RES(pinctrl, 0),
> + MAX20024_SUB_MODULE_RES(gpio, 1),
> + MAX20024_SUB_MODULE_NO_RES(pmic, 2),
> + MAX20024_SUB_MODULE_RES(rtc, 3),
> + MAX77620_SUB_MODULE_RES(power, 4),
> + MAX20024_SUB_MODULE_NO_RES(wdt, 5),
> + MAX20024_SUB_MODULE_NO_RES(clk, 6),
> +};
> +
> +struct max77620_sub_modules {
> + struct mfd_cell *cells;
> + int ncells;
> + u32 id;
Do you have any way of interrogating the device for it's ID i.e. can
you obtain this dynamically?
> +};
> +
> +static const struct max77620_sub_modules max77620_cells = {
> + .cells = max77620_children,
> + .ncells = ARRAY_SIZE(max77620_children),
> + .id = MAX77620,
> +};
> +
> +static const struct max77620_sub_modules max20024_cells = {
> + .cells = max20024_children,
> + .ncells = ARRAY_SIZE(max20024_children),
> + .id = MAX20024,
> +};
> +
> +static struct regmap_irq_chip max77620_top_irq_chip = {
> + .name = "max77620-top",
> + .irqs = max77620_top_irqs,
> + .num_irqs = ARRAY_SIZE(max77620_top_irqs),
> + .num_regs = 2,
> + .status_base = MAX77620_REG_IRQTOP,
> + .mask_base = MAX77620_REG_IRQTOPM,
> +};
> +
> +static const struct regmap_range max77620_readable_ranges[] = {
> + regmap_reg_range(MAX77620_REG_CNFGGLBL1, MAX77620_REG_DVSSD4),
> +};
> +
> +static const struct regmap_access_table max77620_readable_table = {
> + .yes_ranges = max77620_readable_ranges,
> + .n_yes_ranges = ARRAY_SIZE(max77620_readable_ranges),
> +};
> +
> +static const struct regmap_range max20024_readable_ranges[] = {
> + regmap_reg_range(MAX77620_REG_CNFGGLBL1, MAX77620_REG_DVSSD4),
> + regmap_reg_range(MAX20024_REG_MAX_ADD, MAX20024_REG_MAX_ADD),
> +};
> +
> +static const struct regmap_access_table max20024_readable_table = {
> + .yes_ranges = max20024_readable_ranges,
> + .n_yes_ranges = ARRAY_SIZE(max20024_readable_ranges),
> +};
> +
> +static const struct regmap_range max77620_writable_ranges[] = {
> + regmap_reg_range(MAX77620_REG_CNFGGLBL1, MAX77620_REG_DVSSD4),
> +};
> +
> +static const struct regmap_access_table max77620_writable_table = {
> + .yes_ranges = max77620_writable_ranges,
> + .n_yes_ranges = ARRAY_SIZE(max77620_writable_ranges),
> +};
> +
> +static const struct regmap_range max77620_cacheable_ranges[] = {
> + regmap_reg_range(MAX77620_REG_SD0_CFG, MAX77620_REG_LDO_CFG3),
> + regmap_reg_range(MAX77620_REG_FPS_CFG0, MAX77620_REG_FPS_SD3),
> +};
> +
> +static const struct regmap_access_table max77620_volatile_table = {
> + .no_ranges = max77620_cacheable_ranges,
> + .n_no_ranges = ARRAY_SIZE(max77620_cacheable_ranges),
> +};
> +
> +static const struct regmap_config max77620_regmap_config = {
> + .name = "power-slave",
> + .reg_bits = 8,
> + .val_bits = 8,
> + .max_register = MAX77620_REG_DVSSD4 + 1,
> + .cache_type = REGCACHE_RBTREE,
> + .rd_table = &max77620_readable_table,
> + .wr_table = &max77620_writable_table,
> + .volatile_table = &max77620_volatile_table,
> +};
> +
> +static const struct regmap_config max20024_regmap_config = {
> + .name = "power-slave",
> + .reg_bits = 8,
> + .val_bits = 8,
> + .max_register = MAX20024_REG_MAX_ADD + 1,
> + .cache_type = REGCACHE_RBTREE,
> + .rd_table = &max20024_readable_table,
> + .wr_table = &max77620_writable_table,
> + .volatile_table = &max77620_volatile_table,
> +};
> +
> +int max77620_irq_get_virq(struct device *dev, int irq)
> +{
> + struct max77620_chip *chip = dev_get_drvdata(dev);
> +
> + return regmap_irq_get_virq(chip->top_irq_data, irq);
> +}
> +EXPORT_SYMBOL_GPL(max77620_irq_get_virq);
> +
> +int max77620_reg_write(struct device *dev, unsigned int reg, unsigned int val)
> +{
> + struct max77620_chip *chip = dev_get_drvdata(dev);
> +
> + return regmap_write(chip->rmap, reg, val);
> +}
> +EXPORT_SYMBOL_GPL(max77620_reg_write);
> +
> +int max77620_reg_read(struct device *dev, unsigned int reg, unsigned int *val)
> +{
> + struct max77620_chip *chip = dev_get_drvdata(dev);
> +
> + return regmap_read(chip->rmap, reg, val);
> +}
> +EXPORT_SYMBOL_GPL(max77620_reg_read);
> +
> +int max77620_reg_update(struct device *dev, unsigned int reg,
> + unsigned int mask, unsigned int val)
> +{
> + struct max77620_chip *chip = dev_get_drvdata(dev);
> +
> + return regmap_update_bits(chip->rmap, reg, mask, val);
> +}
> +EXPORT_SYMBOL_GPL(max77620_reg_update);
All of the above look look look abstraction for the sake of
abstraction. Why aren't you ing the regmap_ calls from the child
devices?
> +static int max77620_get_fps_period_reg_value(struct max77620_chip *chip,
> + int tperiod)
> +{
> + int base_fps_time = (chip->id == MAX20024) ? 20 : 40;
> + int x, i;
> +
> + for (i = 0; i < 0x7; ++i) {
> + x = base_fps_time * BIT(i);
> + if (x >= tperiod)
> + return i;
> + }
> +
> + return i;
> +}
> +
> +static int max77620_config_fps(struct max77620_chip *chip,
> + struct device_node *fps_np)
> +{
> + struct device *dev = chip->dev;
> + unsigned int mask = 0, config = 0;
> + u32 pval;
> + int tperiod, fps_id;
> + int ret;
> +
> + for (fps_id = 0; fps_id < MAX77620_FPS_COUNT; ++fps_id) {
> + if (!strcmp(fps_np->name, of_max77620_fps_node_name[fps_id]))
> + break;
> + }
Please see my comment at the declaration of of_max77620_fps_node_name
for my suggestion.
> + if (fps_id == MAX77620_FPS_COUNT) {
>=
> + dev_err(dev, "FPS child name %s is not valid\n", fps_np->name);
"node name"
> + return -EINVAL;
> + }
> +
> + ret = of_property_read_u32(fps_np, "maxim,shutdown-fps-time-period-us",
> + &pval);
What's a pval?
Do me that's a pointer to a value, which is not the case here.
> + if (!ret) {
> + mask |= MAX77620_FPS_TIME_PERIOD_MASK;
> + chip->shutdown_fps_period[fps_id] = min(pval, 5120U);
> + tperiod = max77620_get_fps_period_reg_value(
> + chip, chip->shutdown_fps_period[fps_id]);
Don't break lines after '('.
> + config |= tperiod << MAX77620_FPS_TIME_PERIOD_SHIFT;
> + }
> +
> + ret = of_property_read_u32(fps_np, "maxim,suspend-fps-time-period-us",
> + &pval);
> + if (!ret)
> + chip->suspend_fps_period[fps_id] = min(pval, 5120U);
> +
> + ret = of_property_read_u32(fps_np, "maxim,fps-control", &pval);
> + if (!ret) {
> + if (pval > 2) {
> + dev_err(dev, "FPS %d fps-control invalid\n", fps_id);
You can't issue an error, then not return one.
Either return, or demote to dev_warn().
> + } else {
> + mask |= MAX77620_FPS_EN_SRC_MASK;
> + config |= (pval & 0x3) << MAX77620_FPS_EN_SRC_SHIFT;
> + if (pval == 2) {
> + mask |= MAX77620_FPS_ENFPS_SW_MASK;
> + config |= MAX77620_FPS_ENFPS_SW;
> + }
> + }
> + }
> +
> + if (!chip->sleep_enable)
> + chip->sleep_enable = of_property_read_bool(fps_np,
> + "maxim,enable-sleep");
Better to break at the '=' here.
> + if (!chip->enable_global_lpm)
> + chip->enable_global_lpm = of_property_read_bool(fps_np,
> + "maxim,enable-global-lpm");
Same here.
> + ret = max77620_reg_update(dev, MAX77620_REG_FPS_CFG0 + fps_id,
> + mask, config);
> + if (ret < 0) {
> + dev_err(dev, "Reg 0x%02x update failed: %d\n",
> + MAX77620_REG_FPS_CFG0 + fps_id, ret);
> + return ret;
> + }
> +
> + return 0;
> +}
> +
> +static int max77620_initialise_fps(struct max77620_chip *chip,
> + struct device *dev)
> +{
> + struct device_node *fps_np, *fps_child;
> + u8 config;
> + int fps_id;
> + int ret;
> +
> + for (fps_id = 0; fps_id < 3; ++fps_id) {
MAX77620_FPS_COUNT
fps_id++
> + chip->shutdown_fps_period[fps_id] = -1;
> + chip->suspend_fps_period[fps_id] = -1;
> + }
> +
> + fps_np = of_get_child_by_name(dev->of_node, "fps");
> + if (!fps_np)
> + goto skip_fps;
> +
> + for_each_child_of_node(fps_np, fps_child) {
> + ret = max77620_config_fps(chip, fps_child);
> + if (ret < 0)
> + return ret;
> + }
> +
> + config = chip->enable_global_lpm ? MAX77620_ONOFFCNFG2_SLP_LPM_MSK : 0;
> + ret = max77620_reg_update(chip->dev, MAX77620_REG_ONOFFCNFG2,
> + MAX77620_ONOFFCNFG2_SLP_LPM_MSK, config);
> + if (ret < 0) {
> + dev_err(dev, "Reg ONOFFCNFG2 update failed: %d\n", ret);
> + return ret;
> + }
> +
> +skip_fps:
> + /* Enable wake on EN0 pin */
> + ret = max77620_reg_update(chip->dev, MAX77620_REG_ONOFFCNFG2,
> + MAX77620_ONOFFCNFG2_WK_EN0,
> + MAX77620_ONOFFCNFG2_WK_EN0);
> + if (ret < 0) {
> + dev_err(dev, "Reg ONOFFCNFG2 WK_EN0 update failed: %d\n", ret);
> + return ret;
> + }
> +
> + if (!chip->sleep_enable)
> + chip->sleep_enable = of_property_read_bool(dev->of_node,
> + "maxim,enable-sleep");
> +
> + /* For MAX20024, SLPEN will be POR reset if CLRSE is b11 */
> + if ((chip->id == MAX20024) && chip->sleep_enable) {
> + config = MAX77620_ONOFFCNFG1_SLPEN | MAX20024_ONOFFCNFG1_CLRSE;
> + ret = max77620_reg_update(chip->dev, MAX77620_REG_ONOFFCNFG1,
> + config, config);
> + if (ret < 0) {
> + dev_err(dev, "Reg ONOFFCNFG1 update failed: %d\n", ret);
> + return ret;
> + }
> + }
> +
> + return 0;
> +}
> +
> +static int max77620_initialise_chip(struct max77620_chip *chip,
> + struct device *dev)
> +{
> + struct device_node *np = dev->of_node;
> + u32 mrt_time = 0;
> + u8 reg_val;
> + int ret;
> +
> + ret = of_property_read_u32(np, "maxim,hard-power-off-time", &mrt_time);
> + if (ret < 0)
> + return 0;
> +
> + mrt_time = (mrt_time > 12) ? 12 : mrt_time;
> + if (mrt_time <= 6)
> + reg_val = mrt_time - 2;
> + else
> + reg_val = (mrt_time - 6) / 2 + 4;
These need defining.
> + reg_val <<= MAX77620_ONOFFCNFG1_MRT_SHIFT;
> +
> + ret = max77620_reg_update(dev, MAX77620_REG_ONOFFCNFG1,
> + MAX77620_ONOFFCNFG1_MRT_MASK, reg_val);
> + if (ret < 0) {
> + dev_err(dev, "REG ONOFFCNFG1 update failed: %d\n", ret);
> + return ret;
> + }
> +
> + /* Disable alarm wake to enable sleep from EN input signal */
> + ret = max77620_reg_update(dev, MAX77620_REG_ONOFFCNFG2,
> + MAX77620_ONOFFCNFG2_WK_ALARM1, 0);
> + if (ret < 0) {
> + dev_err(dev, "REG ONOFFCNFG2 update failed: %d\n", ret);
> + return ret;
> + }
> +
> + return ret;
> +}
> +
> +static int max77620_read_es_version(struct max77620_chip *chip)
> +{
> + unsigned int val;
> + u8 cid_val[6];
> + int i;
> + int ret;
> +
> + for (i = MAX77620_REG_CID0; i <= MAX77620_REG_CID5; ++i) {
i++
> + ret = max77620_reg_read(chip->dev, i, &val);
> + if (ret < 0) {
> + dev_err(chip->dev, "CID%d register read failed: %d\n",
> + i - MAX77620_REG_CID0, ret);
> + return ret;
> + }
> + dev_dbg(chip->dev, "CID%d: 0x%02x\n",
> + i - MAX77620_REG_CID0, val);
> + cid_val[i - MAX77620_REG_CID0] = val;
> + }
> +
> + /* CID4 is OTP Version and CID5 is ES version */
> + dev_info(chip->dev, "PMIC Version OTP:0x%02X and ES:0x%02X\n",
> + cid_val[4], MAX77620_CID5_DIDM(cid_val[5]));
> +
> + return ret;
> +}
> +
> +static int max77620_probe(struct i2c_client *client,
> + const struct i2c_device_id *id)
> +{
> + struct device_node *node = client->dev.of_node;
You've used 'np' before, which also happens to be my preference.
> + const struct max77620_sub_modules *children;
> + const struct regmap_config *rmap_config = &max77620_regmap_config;
> + struct max77620_chip *chip;
> + int ret = 0;
> +
> + if (!node) {
> + dev_err(&client->dev, "Device is not from DT\n");
> + return -ENODEV;
> + }
> +
> + children = of_device_get_match_data(&client->dev);
> + if (!children)
> + return -ENODEV;
> +
> + chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
> + if (!chip)
> + return -ENOMEM;
> +
> + i2c_set_clientdata(client, chip);
> + chip->dev = &client->dev;
> + chip->irq_base = -1;
> + chip->chip_irq = client->irq;
> + chip->id = children->id;
> + chip->base_client = client;
You don't need client AND client->dev AND client->irq.
If you have one, you have them all, please the superfluous
attributes.
> + if (chip->id == MAX20024)
> + rmap_config = &max20024_regmap_config;
> +
> + chip->rmap = devm_regmap_init_i2c(chip->base_client, rmap_config);
> + if (IS_ERR(chip->rmap)) {
> + ret = PTR_ERR(chip->rmap);
> + dev_err(&client->dev, "regmap init failed %d\n", ret);
> + return ret;
> + }
> +
> + mutex_init(&chip->mutex_config);
> +
> + ret = max77620_read_es_version(chip);
> + if (ret < 0)
> + return ret;
> +
> + ret = max77620_initialise_chip(chip, &client->dev);
> + if (ret < 0)
> + return ret;
> +
> + ret = regmap_add_irq_chip(chip->rmap, chip->chip_irq,
> + IRQF_ONESHOT | IRQF_SHARED,
> + chip->irq_base, &max77620_top_irq_chip,
> + &chip->top_irq_data);
> + if (ret < 0) {
> + dev_err(chip->dev, "Failed to add top irq_chip %d\n", ret);
> + return ret;
> + }
What do you mean by 'top'?
> + ret = max77620_initialise_fps(chip, &client->dev);
> + if (ret < 0)
> + goto fail_free_irq;
> +
> + ret = mfd_add_devices(&client->dev, -1, children->cells,
Please use the PLATFORM_DEVID_ defines.
> + children->ncells, NULL, 0,
> + regmap_irq_get_domain(chip->top_irq_data));
> + if (ret < 0) {
> + dev_err(&client->dev, "mfd add dev fail %d\n", ret);
"Failed to add sub devices"
> + goto fail_free_irq;
> + }
> +
> + return 0;
> +
> +fail_free_irq:
> + regmap_del_irq_chip(chip->chip_irq, chip->top_irq_data);
> +
> + return ret;
> +}
> +
> +static int max77620_remove(struct i2c_client *client)
> +{
> + struct max77620_chip *chip = i2c_get_clientdata(client);
> +
> + mfd_remove_devices(chip->dev);
> + regmap_del_irq_chip(chip->chip_irq, chip->top_irq_data);
> +
> + return 0;
> +}
> +
> +#ifdef CONFIG_PM_SLEEP
> +static int max77620_set_fps_period(struct max77620_chip *chip,
> + int fps_id, int time_period)
> +{
> + struct device *dev = chip->dev;
> + int period = max77620_get_fps_period_reg_value(chip, time_period);
> + int ret;
> +
> + ret = max77620_reg_update(dev, MAX77620_REG_FPS_CFG0 + fps_id,
> + MAX77620_FPS_TIME_PERIOD_MASK,
> + period << MAX77620_FPS_TIME_PERIOD_SHIFT);
> + if (ret < 0) {
> + dev_err(dev, "Reg 0x%02x write failed: %d\n",
> + MAX77620_REG_FPS_CFG0 + fps_id, ret);
> + return ret;
> + }
> +
> + return 0;
> +}
> +
> +static int max77620_i2c_suspend(struct device *dev)
> +{
> + struct max77620_chip *chip = dev_get_drvdata(dev);
> + unsigned int config;
> + int fps;
> + int ret;
> +
> + for (fps = 0; fps < 2; ++fps) {
> + if (chip->suspend_fps_period[fps] < 0)
> + continue;
> +
> + ret = max77620_set_fps_period(chip, fps,
> + chip->suspend_fps_period[fps]);
> + if (ret < 0)
> + dev_err(dev, "FPS%d config failed: %d\n", fps, ret);
> + }
> +
> + /*
> + * For MAX20024: No need to configure SLPEN on suspend as
> + * it will be configured on Init.
> + */
> + if (chip->id == MAX20024)
> + goto out;
> +
> + config = (chip->sleep_enable) ? MAX77620_ONOFFCNFG1_SLPEN : 0;
> + ret = max77620_reg_update(chip->dev, MAX77620_REG_ONOFFCNFG1,
> + MAX77620_ONOFFCNFG1_SLPEN,
> + config);
> + if (ret < 0) {
> + dev_err(dev, "Reg ONOFFCNFG1 update failed: %d\n", ret);
> + return ret;
> + }
> +
> + /* Disable WK_EN0 */
> + ret = max77620_reg_update(chip->dev, MAX77620_REG_ONOFFCNFG2,
> + MAX77620_ONOFFCNFG2_WK_EN0, 0);
> + if (ret < 0) {
> + dev_err(dev, "Reg ONOFFCNFG2 WK_EN0 update failed: %d\n", ret);
> + return ret;
> + }
> +
> +out:
> + disable_irq(chip->chip_irq);
> +
> + return 0;
> +}
> +
> +static int max77620_i2c_resume(struct device *dev)
> +{
> + struct max77620_chip *chip = dev_get_drvdata(dev);
> + int ret;
> + int fps;
> +
> + for (fps = 0; fps < 2; ++fps) {
> + if (chip->shutdown_fps_period[fps] < 0)
> + continue;
> +
> + ret = max77620_set_fps_period(chip, fps,
> + chip->shutdown_fps_period[fps]);
> + if (ret < 0)
> + dev_err(dev, "FPS%d config failed: %d\n", fps, ret);
> + }
> +
> + /*
> + * For MAX20024: No need to configure WKEN0 on resume as
> + * it is configured on Init.
> + */
> + if (chip->id == MAX20024)
> + goto out;
> +
> + /* Enable WK_EN0 */
> + ret = max77620_reg_update(chip->dev, MAX77620_REG_ONOFFCNFG2,
> + MAX77620_ONOFFCNFG2_WK_EN0,
> + MAX77620_ONOFFCNFG2_WK_EN0);
> + if (ret < 0) {
> + dev_err(dev, "Reg ONOFFCNFG2 WK_EN0 update failed: %d\n", ret);
> + return ret;
> + }
> +
> +out:
> + enable_irq(chip->chip_irq);
> +
> + return 0;
> +}
> +#endif
> +
> +static const struct i2c_device_id max77620_id[] = {
> + {"max77620", MAX77620},
> + {"max20024", MAX20024},
> + {},
> +};
> +MODULE_DEVICE_TABLE(i2c, max77620_id);
> +
> +static const struct of_device_id max77620_of_match[] = {
> + {
> + .compatible = "maxim,max77620",
> + .data = &max77620_cells,
> + }, {
> + .compatible = "maxim,max20024",
> + .data = &max20024_cells,
> + }, {
> + },
> +};
> +MODULE_DEVICE_TABLE(of, max77620_of_match);
This is not acceptable. EITHER use DT OR MFD methods of registering
devices, do not mix the two.
> +static const struct dev_pm_ops max77620_pm_ops = {
> + SET_SYSTEM_SLEEP_PM_OPS(max77620_i2c_suspend, max77620_i2c_resume)
> +};
> +
> +static struct i2c_driver max77620_driver = {
> + .driver = {
> + .name = "max77620",
> + .pm = &max77620_pm_ops,
> + .of_match_table = max77620_of_match,
> + },
> + .probe = max77620_probe,
> + .remove = max77620_remove,
> + .id_table = max77620_id,
> +};
> +
> +module_i2c_driver(max77620_driver);
> +
> +MODULE_DESCRIPTION("MAX77620/MAX20024 Multi Function Device Core Driver");
> +MODULE_AUTHOR("Laxman Dewangan <ldewangan@...dia.com>");
> +MODULE_AUTHOR("Chaitanya Bandi <bandik@...dia.com>");
> +MODULE_AUTHOR("Mallikarjun Kasoju <mkasoju@...dia.com>");
> +MODULE_ALIAS("i2c:max77620");
> +MODULE_LICENSE("GPL v2");
> diff --git a/include/linux/mfd/max77620.h b/include/linux/mfd/max77620.h
> new file mode 100644
> index 0000000..5e014f1
> --- /dev/null
> +++ b/include/linux/mfd/max77620.h
> @@ -0,0 +1,406 @@
> +/*
> + * max77620.h: Defining registers address and its bit definitions
Please remove the filename from the header.
> + * of MAX77620 and MAX20024
> + *
> + * Copyright (C) 2016 NVIDIA CORPORATION. All rights reserved.
> + *
> + * This program is free software; you can redistribute it and/or modify it
> + * under the terms and conditions of the GNU General Public License,
> + * version 2, as published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope 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.
> + */
Can you use the shorter version?
> +#ifndef _LINUX_MFD_MAX77620_H_
> +#define _LINUX_MFD_MAX77620_H_
> +
> +/* GLOBAL, PMIC, GPIO, FPS, ONOFFC, CID Registers */
> +#define MAX77620_REG_CNFGGLBL1 0x00
> +#define MAX77620_REG_CNFGGLBL2 0x01
> +#define MAX77620_REG_CNFGGLBL3 0x02
> +#define MAX77620_REG_CNFG1_32K 0x03
> +#define MAX77620_REG_CNFGBBC 0x04
> +#define MAX77620_REG_IRQTOP 0x05
> +#define MAX77620_REG_INTLBT 0x06
> +#define MAX77620_REG_IRQSD 0x07
> +#define MAX77620_REG_IRQ_LVL2_L0_7 0x08
> +#define MAX77620_REG_IRQ_LVL2_L8 0x09
> +#define MAX77620_REG_IRQ_LVL2_GPIO 0x0A
> +#define MAX77620_REG_ONOFFIRQ 0x0B
> +#define MAX77620_REG_NVERC 0x0C
> +#define MAX77620_REG_IRQTOPM 0x0D
> +#define MAX77620_REG_INTENLBT 0x0E
> +#define MAX77620_REG_IRQMASKSD 0x0F
> +#define MAX77620_REG_IRQ_MSK_L0_7 0x10
> +#define MAX77620_REG_IRQ_MSK_L8 0x11
> +#define MAX77620_REG_ONOFFIRQM 0x12
> +#define MAX77620_REG_STATLBT 0x13
> +#define MAX77620_REG_STATSD 0x14
> +#define MAX77620_REG_ONOFFSTAT 0x15
> +
> +/* SD and LDO Registers */
> +#define MAX77620_REG_SD0 0x16
> +#define MAX77620_REG_SD1 0x17
> +#define MAX77620_REG_SD2 0x18
> +#define MAX77620_REG_SD3 0x19
> +#define MAX77620_REG_SD4 0x1A
> +#define MAX77620_REG_DVSSD0 0x1B
> +#define MAX77620_REG_DVSSD1 0x1C
> +#define MAX77620_REG_SD0_CFG 0x1D
> +#define MAX77620_REG_SD1_CFG 0x1E
> +#define MAX77620_REG_SD2_CFG 0x1F
> +#define MAX77620_REG_SD3_CFG 0x20
> +#define MAX77620_REG_SD4_CFG 0x21
> +#define MAX77620_REG_SD_CFG2 0x22
> +#define MAX77620_REG_LDO0_CFG 0x23
> +#define MAX77620_REG_LDO0_CFG2 0x24
> +#define MAX77620_REG_LDO1_CFG 0x25
> +#define MAX77620_REG_LDO1_CFG2 0x26
> +#define MAX77620_REG_LDO2_CFG 0x27
> +#define MAX77620_REG_LDO2_CFG2 0x28
> +#define MAX77620_REG_LDO3_CFG 0x29
> +#define MAX77620_REG_LDO3_CFG2 0x2A
> +#define MAX77620_REG_LDO4_CFG 0x2B
> +#define MAX77620_REG_LDO4_CFG2 0x2C
> +#define MAX77620_REG_LDO5_CFG 0x2D
> +#define MAX77620_REG_LDO5_CFG2 0x2E
> +#define MAX77620_REG_LDO6_CFG 0x2F
> +#define MAX77620_REG_LDO6_CFG2 0x30
> +#define MAX77620_REG_LDO7_CFG 0x31
> +#define MAX77620_REG_LDO7_CFG2 0x32
> +#define MAX77620_REG_LDO8_CFG 0x33
> +#define MAX77620_REG_LDO8_CFG2 0x34
> +#define MAX77620_REG_LDO_CFG3 0x35
> +
> +#define MAX77620_LDO_SLEW_RATE_MASK 0x1
> +
> +/* LDO Configuration 3 */
> +#define MAX77620_TRACK4_MASK BIT(5)
> +#define MAX77620_TRACK4_SHIFT 5
> +
> +/* Voltage */
> +#define MAX77620_SDX_VOLT_MASK 0xFF
> +#define MAX77620_SD0_VOLT_MASK 0x3F
> +#define MAX77620_SD1_VOLT_MASK 0x7F
> +#define MAX77620_LDO_VOLT_MASK 0x3F
> +
> +#define MAX77620_REG_GPIO0 0x36
> +#define MAX77620_REG_GPIO1 0x37
> +#define MAX77620_REG_GPIO2 0x38
> +#define MAX77620_REG_GPIO3 0x39
> +#define MAX77620_REG_GPIO4 0x3A
> +#define MAX77620_REG_GPIO5 0x3B
> +#define MAX77620_REG_GPIO6 0x3C
> +#define MAX77620_REG_GPIO7 0x3D
> +#define MAX77620_REG_PUE_GPIO 0x3E
> +#define MAX77620_REG_PDE_GPIO 0x3F
> +#define MAX77620_REG_AME_GPIO 0x40
> +#define MAX77620_REG_ONOFFCNFG1 0x41
> +#define MAX77620_REG_ONOFFCNFG2 0x42
> +
> +/* FPS Registers */
> +#define MAX77620_REG_FPS_CFG0 0x43
> +#define MAX77620_REG_FPS_CFG1 0x44
> +#define MAX77620_REG_FPS_CFG2 0x45
> +#define MAX77620_REG_FPS_LDO0 0x46
> +#define MAX77620_REG_FPS_LDO1 0x47
> +#define MAX77620_REG_FPS_LDO2 0x48
> +#define MAX77620_REG_FPS_LDO3 0x49
> +#define MAX77620_REG_FPS_LDO4 0x4A
> +#define MAX77620_REG_FPS_LDO5 0x4B
> +#define MAX77620_REG_FPS_LDO6 0x4C
> +#define MAX77620_REG_FPS_LDO7 0x4D
> +#define MAX77620_REG_FPS_LDO8 0x4E
> +#define MAX77620_REG_FPS_SD0 0x4F
> +#define MAX77620_REG_FPS_SD1 0x50
> +#define MAX77620_REG_FPS_SD2 0x51
> +#define MAX77620_REG_FPS_SD3 0x52
> +#define MAX77620_REG_FPS_SD4 0x53
> +#define MAX77620_REG_FPS_NONE 0
> +
> +#define MAX77620_FPS_SRC_MASK 0xC0
> +#define MAX77620_FPS_SRC_SHIFT 6
> +#define MAX77620_FPS_PU_PERIOD_MASK 0x38
> +#define MAX77620_FPS_PU_PERIOD_SHIFT 3
> +#define MAX77620_FPS_PD_PERIOD_MASK 0x07
> +#define MAX77620_FPS_PD_PERIOD_SHIFT 0
> +#define MAX77620_FPS_TIME_PERIOD_MASK 0x38
> +#define MAX77620_FPS_TIME_PERIOD_SHIFT 3
> +#define MAX77620_FPS_EN_SRC_MASK 0x06
> +#define MAX77620_FPS_EN_SRC_SHIFT 1
> +#define MAX77620_FPS_ENFPS_SW_MASK 0x01
> +#define MAX77620_FPS_ENFPS_SW 0x01
> +
> +#define MAX77620_REG_FPS_GPIO1 0x54
> +#define MAX77620_REG_FPS_GPIO2 0x55
> +#define MAX77620_REG_FPS_GPIO3 0x56
> +#define MAX77620_REG_FPS_RSO 0x57
> +#define MAX77620_REG_CID0 0x58
> +#define MAX77620_REG_CID1 0x59
> +#define MAX77620_REG_CID2 0x5A
> +#define MAX77620_REG_CID3 0x5B
> +#define MAX77620_REG_CID4 0x5C
> +#define MAX77620_REG_CID5 0x5D
> +
> +#define MAX77620_REG_DVSSD4 0x5E
> +#define MAX20024_REG_MAX_ADD 0x70
> +
> +#define MAX77620_CID_DIDM_MASK 0xF0
> +#define MAX77620_CID_DIDM_SHIFT 4
> +
> +/* CNCG2SD */
> +#define MAX77620_SD_CNF2_ROVS_EN_SD1 BIT(1)
> +#define MAX77620_SD_CNF2_ROVS_EN_SD0 BIT(2)
> +
> +/* Device Identification Metal */
> +#define MAX77620_CID5_DIDM(n) (((n) >> 4) & 0xF)
> +/* Device Indentification OTP */
> +#define MAX77620_CID5_DIDO(n) ((n) & 0xF)
> +
> +/* SD CNFG1 */
> +#define MAX77620_SD_SR_MASK 0xC0
> +#define MAX77620_SD_SR_SHIFT 6
> +#define MAX77620_SD_POWER_MODE_MASK 0x30
> +#define MAX77620_SD_POWER_MODE_SHIFT 4
> +#define MAX77620_SD_CFG1_ADE_MASK BIT(3)
> +#define MAX77620_SD_CFG1_ADE_DISABLE 0
> +#define MAX77620_SD_CFG1_ADE_ENABLE BIT(3)
> +#define MAX77620_SD_FPWM_MASK 0x04
> +#define MAX77620_SD_FPWM_SHIFT 2
> +#define MAX77620_SD_FSRADE_MASK 0x01
> +#define MAX77620_SD_FSRADE_SHIFT 0
> +#define MAX77620_SD_CFG1_FPWM_SD_MASK BIT(2)
> +#define MAX77620_SD_CFG1_FPWM_SD_SKIP 0
> +#define MAX77620_SD_CFG1_FPWM_SD_FPWM BIT(2)
> +#define MAX77620_SD_CFG1_FSRADE_SD_MASK BIT(0)
> +#define MAX77620_SD_CFG1_FSRADE_SD_DISABLE 0
> +#define MAX77620_SD_CFG1_FSRADE_SD_ENABLE BIT(0)
> +
> +/* LDO_CNFG2 */
> +#define MAX77620_LDO_POWER_MODE_MASK 0xC0
> +#define MAX77620_LDO_POWER_MODE_SHIFT 6
> +#define MAX77620_LDO_CFG2_ADE_MASK BIT(1)
> +#define MAX77620_LDO_CFG2_ADE_DISABLE 0
> +#define MAX77620_LDO_CFG2_ADE_ENABLE BIT(1)
> +#define MAX77620_LDO_CFG2_SS_MASK BIT(0)
> +#define MAX77620_LDO_CFG2_SS_FAST BIT(0)
> +#define MAX77620_LDO_CFG2_SS_SLOW 0
> +
> +#define MAX77620_IRQ_TOP_GLBL_MASK BIT(7)
> +#define MAX77620_IRQ_TOP_SD_MASK BIT(6)
> +#define MAX77620_IRQ_TOP_LDO_MASK BIT(5)
> +#define MAX77620_IRQ_TOP_GPIO_MASK BIT(4)
> +#define MAX77620_IRQ_TOP_RTC_MASK BIT(3)
> +#define MAX77620_IRQ_TOP_32K_MASK BIT(2)
> +#define MAX77620_IRQ_TOP_ONOFF_MASK BIT(1)
> +
> +#define MAX77620_IRQ_LBM_MASK BIT(3)
> +#define MAX77620_IRQ_TJALRM1_MASK BIT(2)
> +#define MAX77620_IRQ_TJALRM2_MASK BIT(1)
> +
> +#define MAX77620_PWR_I2C_ADDR 0x3c
> +#define MAX77620_RTC_I2C_ADDR 0x68
> +
> +#define MAX77620_CNFG_GPIO_DRV_MASK BIT(0)
> +#define MAX77620_CNFG_GPIO_DRV_PUSHPULL BIT(0)
> +#define MAX77620_CNFG_GPIO_DRV_OPENDRAIN 0
> +#define MAX77620_CNFG_GPIO_DIR_MASK BIT(1)
> +#define MAX77620_CNFG_GPIO_DIR_INPUT BIT(1)
> +#define MAX77620_CNFG_GPIO_DIR_OUTPUT 0
> +#define MAX77620_CNFG_GPIO_INPUT_VAL_MASK BIT(2)
> +#define MAX77620_CNFG_GPIO_OUTPUT_VAL_MASK BIT(3)
> +#define MAX77620_CNFG_GPIO_OUTPUT_VAL_HIGH BIT(3)
> +#define MAX77620_CNFG_GPIO_OUTPUT_VAL_LOW 0
> +#define MAX77620_CNFG_GPIO_INT_MASK (0x3 << 4)
> +#define MAX77620_CNFG_GPIO_INT_FALLING BIT(4)
> +#define MAX77620_CNFG_GPIO_INT_RISING BIT(5)
> +#define MAX77620_CNFG_GPIO_DBNC_MASK (0x3 << 6)
> +#define MAX77620_CNFG_GPIO_DBNC_None (0x0 << 6)
> +#define MAX77620_CNFG_GPIO_DBNC_8ms (0x1 << 6)
> +#define MAX77620_CNFG_GPIO_DBNC_16ms (0x2 << 6)
> +#define MAX77620_CNFG_GPIO_DBNC_32ms (0x3 << 6)
> +
> +#define MAX77620_IRQ_LVL2_GPIO_EDGE0 BIT(0)
> +#define MAX77620_IRQ_LVL2_GPIO_EDGE1 BIT(1)
> +#define MAX77620_IRQ_LVL2_GPIO_EDGE2 BIT(2)
> +#define MAX77620_IRQ_LVL2_GPIO_EDGE3 BIT(3)
> +#define MAX77620_IRQ_LVL2_GPIO_EDGE4 BIT(4)
> +#define MAX77620_IRQ_LVL2_GPIO_EDGE5 BIT(5)
> +#define MAX77620_IRQ_LVL2_GPIO_EDGE6 BIT(6)
> +#define MAX77620_IRQ_LVL2_GPIO_EDGE7 BIT(7)
> +
> +#define MAX77620_CNFG1_32K_OUT0_EN BIT(2)
> +
> +#define MAX77620_ONOFFCNFG1_SFT_RST BIT(7)
> +#define MAX77620_ONOFFCNFG1_MRT_MASK 0x38
> +#define MAX77620_ONOFFCNFG1_MRT_SHIFT 0x3
> +#define MAX77620_ONOFFCNFG1_SLPEN BIT(2)
> +#define MAX77620_ONOFFCNFG1_PWR_OFF BIT(1)
> +#define MAX20024_ONOFFCNFG1_CLRSE 0x18
> +
> +#define MAX77620_ONOFFCNFG2_SFT_RST_WK BIT(7)
> +#define MAX77620_ONOFFCNFG2_WD_RST_WK BIT(6)
> +#define MAX77620_ONOFFCNFG2_SLP_LPM_MSK BIT(5)
> +#define MAX77620_ONOFFCNFG2_WK_ALARM1 BIT(2)
> +#define MAX77620_ONOFFCNFG2_WK_EN0 BIT(0)
> +
> +#define MAX77620_GLBLM_MASK BIT(0)
> +
> +#define MAX77620_WDTC_MASK 0x3
> +#define MAX77620_WDTOFFC BIT(4)
> +#define MAX77620_WDTSLPC BIT(3)
> +#define MAX77620_WDTEN BIT(2)
> +
> +#define MAX77620_TWD_MASK 0x3
> +#define MAX77620_TWD_2s 0x0
> +#define MAX77620_TWD_16s 0x1
> +#define MAX77620_TWD_64s 0x2
> +#define MAX77620_TWD_128s 0x3
> +
> +#define MAX77620_CNFGGLBL1_LBDAC_EN BIT(7)
> +#define MAX77620_CNFGGLBL1_MPPLD BIT(6)
> +#define MAX77620_CNFGGLBL1_LBHYST (BIT(5) | BIT(4))
> +#define MAX77620_CNFGGLBL1_LBDAC 0x0E
> +#define MAX77620_CNFGGLBL1_LBRSTEN BIT(0)
> +
> +/* CNFG BBC registers */
> +#define MAX77620_CNFGBBC_ENABLE BIT(0)
> +#define MAX77620_CNFGBBC_CURRENT_MASK 0x06
> +#define MAX77620_CNFGBBC_CURRENT_SHIFT 1
> +#define MAX77620_CNFGBBC_VOLTAGE_MASK 0x18
> +#define MAX77620_CNFGBBC_VOLTAGE_SHIFT 3
> +#define MAX77620_CNFGBBC_LOW_CURRENT_DISABLE BIT(5)
> +#define MAX77620_CNFGBBC_RESISTOR_MASK 0xC0
> +#define MAX77620_CNFGBBC_RESISTOR_SHIFT 6
> +
> +#define MAX77620_FPS_COUNT 3
> +
> +/* I2c Slave Id */
> +enum {
> + MAX77620_PWR_SLAVE,
> + MAX77620_RTC_SLAVE,
> + MAX77620_NUM_SLAVES,
> +};
> +
> +/* GPIOs */
> +enum {
> + MAX77620_GPIO0,
> + MAX77620_GPIO1,
> + MAX77620_GPIO2,
> + MAX77620_GPIO3,
> + MAX77620_GPIO4,
> + MAX77620_GPIO5,
> + MAX77620_GPIO6,
> + MAX77620_GPIO7,
> +
> + MAX77620_GPIO_NR,
> +};
> +
> +/* Interrupts */
> +enum {
> + MAX77620_IRQ_TOP_GLBL, /* Low-Battery */
> + MAX77620_IRQ_TOP_SD, /* SD power fail */
> + MAX77620_IRQ_TOP_LDO, /* LDO power fail */
> + MAX77620_IRQ_TOP_GPIO, /* TOP GPIO internal int to MAX77620 */
> + MAX77620_IRQ_TOP_RTC, /* RTC */
> + MAX77620_IRQ_TOP_32K, /* 32kHz oscillator */
> + MAX77620_IRQ_TOP_ONOFF, /* ON/OFF oscillator */
> +
> + MAX77620_IRQ_LBT_MBATLOW, /* Thermal alarm status, > 120C */
> + MAX77620_IRQ_LBT_TJALRM1, /* Thermal alarm status, > 120C */
> + MAX77620_IRQ_LBT_TJALRM2, /* Thermal alarm status, > 140C */
> +
> + MAX77620_IRQ_GPIO0, /* GPIO0 edge detection */
> + MAX77620_IRQ_GPIO1, /* GPIO1 edge detection */
> + MAX77620_IRQ_GPIO2, /* GPIO2 edge detection */
> + MAX77620_IRQ_GPIO3, /* GPIO3 edge detection */
> + MAX77620_IRQ_GPIO4, /* GPIO4 edge detection */
> + MAX77620_IRQ_GPIO5, /* GPIO5 edge detection */
> + MAX77620_IRQ_GPIO6, /* GPIO6 edge detection */
> + MAX77620_IRQ_GPIO7, /* GPIO7 edge detection */
> +
> + MAX77620_IRQ_ONOFF_MRWRN, /* Hard power off warnning */
> + MAX77620_IRQ_ONOFF_EN0_1SEC, /* EN0 active for 1s */
> + MAX77620_IRQ_ONOFF_EN0_F, /* EN0 falling */
> + MAX77620_IRQ_ONOFF_EN0_R, /* EN0 rising */
> + MAX77620_IRQ_ONOFF_LID_F, /* LID falling */
> + MAX77620_IRQ_ONOFF_LID_R, /* LID rising */
> + MAX77620_IRQ_ONOFF_ACOK_F, /* ACOK falling */
> + MAX77620_IRQ_ONOFF_ACOK_R, /* ACOK rising */
> +
> + MAX77620_IRQ_NVER, /* Non-Volatile Event Recorder */
> + MAX77620_IRQ_NR,
> +};
> +
> +enum max77620_regulators {
> + MAX77620_REGULATOR_ID_SD0,
> + MAX77620_REGULATOR_ID_SD1,
> + MAX77620_REGULATOR_ID_SD2,
> + MAX77620_REGULATOR_ID_SD3,
> + MAX77620_REGULATOR_ID_SD4,
> + MAX77620_REGULATOR_ID_LDO0,
> + MAX77620_REGULATOR_ID_LDO1,
> + MAX77620_REGULATOR_ID_LDO2,
> + MAX77620_REGULATOR_ID_LDO3,
> + MAX77620_REGULATOR_ID_LDO4,
> + MAX77620_REGULATOR_ID_LDO5,
> + MAX77620_REGULATOR_ID_LDO6,
> + MAX77620_REGULATOR_ID_LDO7,
> + MAX77620_REGULATOR_ID_LDO8,
> + MAX77620_NUM_REGS,
> +};
> +
> +/* FPS Source */
> +enum max77620_regulator_fps_src {
> + FPS_SRC_0,
> + FPS_SRC_1,
> + FPS_SRC_2,
> + FPS_SRC_NONE,
> + FPS_SRC_DEF,
> +};
> +
> +/* Regulator types */
> +enum max77620_regulator_type {
> + MAX77620_REGULATOR_TYPE_SD,
> + MAX77620_REGULATOR_TYPE_LDO_N,
> + MAX77620_REGULATOR_TYPE_LDO_P,
> +};
> +
> +enum max77620_chip_id {
> + MAX77620,
> + MAX20024,
> +};
> +
> +struct max77620_chip {
> + struct device *dev;
> +
> + struct i2c_client *base_client;
> + struct regmap *rmap;
> +
> + int chip_irq;
> + int irq_base;
> +
> + struct mutex mutex_config;
> + bool sleep_enable;
> + bool enable_global_lpm;
> + int shutdown_fps_period[MAX77620_FPS_COUNT];
> + int suspend_fps_period[MAX77620_FPS_COUNT];
> +
> + struct regmap_irq_chip_data *top_irq_data;
> + struct regmap_irq_chip_data *gpio_irq_data;
> +
> + /* chip id */
> + u32 id;
> +};
> +
> +extern int max77620_irq_get_virq(struct device *dev, int irq);
> +extern int max77620_reg_write(struct device *dev, unsigned int reg,
> + unsigned int val);
> +extern int max77620_reg_read(struct device *dev, unsigned int reg,
> + unsigned int *val);
> +extern int max77620_reg_update(struct device *dev, unsigned int reg,
> + unsigned int mask, unsigned int val);
> +#endif /* _LINUX_MFD_MAX77620_H_ */
--
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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