* [PATCH V12 2/2] gpio: max77620: add gpio driver for MAX77620/MAX20024
2016-05-13 5:19 [PATCH V12 1/2] gpio: add DT binding doc for gpio of PMIC max77620/max20024 Laxman Dewangan
2016-05-13 5:19 ` [PATCH V12 1/2] pinctrl: add DT binding doc for pincontrol " Laxman Dewangan
@ 2016-05-13 5:19 ` Laxman Dewangan
2016-05-24 11:09 ` Linus Walleij
[not found] ` <1463116755-30469-3-git-send-email-ldewangan-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2016-05-13 5:19 ` [PATCH V12 2/2] pinctrl: max77620: add pincontrol " Laxman Dewangan
2016-05-24 11:07 ` [PATCH V12 1/2] gpio: add DT binding doc for gpio of PMIC max77620/max20024 Linus Walleij
3 siblings, 2 replies; 12+ messages in thread
From: Laxman Dewangan @ 2016-05-13 5:19 UTC (permalink / raw)
To: linus.walleij, robh+dt
Cc: devicetree, linux-kernel, linux-gpio, Laxman Dewangan
MAXIM Semiconductor's PMIC, MAX77620/MAX20024 has 8 GPIO
pins. It also supports interrupts from these pins.
Add GPIO driver for these pins to control via GPIO APIs.
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
---
This as part of the max77620 series and mfd patch are already applied.
This can go in subsystem branch.
Changes from V1:
- Use the gpiochip_add_data and get the chip data from core APIs.
- Cleanups based on comment received on mfd/rtc.
- Avoid duplication on error message.
Changes form V2:
- Run coccicheck and checkpatch in strict mode for the alignment.
- update based on api changes from core.
Changes from V3:
- Change all sys initcall to module driver.
- change the max77620_read argument to unisgned int from u8.
Changes from V4:
- Added DT binding document as devicetree/bindings/gpio/gpio-max77620.txt
Changes from V5:
- Separate out DT binding doc for gpio.
- Added reviewed by for Linus W
Changes from V6/V7:
- None
Changes from V8:
- Run checkpatch --strict and fix error. Mostly to use unsigned int instead
of unsigned.
- Use linux/gpio/driver.h
Changes from V9:
- Use devm_regmap_add_irq_chip() and devm_gpiochip_add_data()
Changes from V10:
None
Changes from V11:
- Change bool to tristate in CONFIG
---
drivers/gpio/Kconfig | 9 ++
drivers/gpio/Makefile | 1 +
drivers/gpio/gpio-max77620.c | 238 +++++++++++++++++++++++++++++++++++++++++++
3 files changed, 248 insertions(+)
create mode 100644 drivers/gpio/gpio-max77620.c
diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index 48da857..9244381 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -870,6 +870,15 @@ config GPIO_LP3943
LP3943 can be used as a GPIO expander which provides up to 16 GPIOs.
Open drain outputs are required for this usage.
+config GPIO_MAX77620
+ tristate "GPIO support for PMIC MAX77620 and MAX20024"
+ depends on MFD_MAX77620
+ help
+ GPIO driver for MAX77620 and MAX20024 PMIC from Maxim Semiconductor.
+ MAX77620 PMIC has 8 pins that can be configured as GPIOs. The
+ driver also provides interrupt support for each of the gpios.
+ Say yes here to enable the max77620 to be used as gpio controller.
+
config GPIO_MSIC
bool "Intel MSIC mixed signal gpio support"
depends on MFD_INTEL_MSIC
diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile
index 991598e..6e111fc 100644
--- a/drivers/gpio/Makefile
+++ b/drivers/gpio/Makefile
@@ -61,6 +61,7 @@ obj-$(CONFIG_GPIO_MAX730X) += gpio-max730x.o
obj-$(CONFIG_GPIO_MAX7300) += gpio-max7300.o
obj-$(CONFIG_GPIO_MAX7301) += gpio-max7301.o
obj-$(CONFIG_GPIO_MAX732X) += gpio-max732x.o
+obj-$(CONFIG_GPIO_MAX77620) += gpio-max77620.o
obj-$(CONFIG_GPIO_MB86S7X) += gpio-mb86s7x.o
obj-$(CONFIG_GPIO_MENZ127) += gpio-menz127.o
obj-$(CONFIG_GPIO_MC33880) += gpio-mc33880.o
diff --git a/drivers/gpio/gpio-max77620.c b/drivers/gpio/gpio-max77620.c
new file mode 100644
index 0000000..d927562
--- /dev/null
+++ b/drivers/gpio/gpio-max77620.c
@@ -0,0 +1,238 @@
+/*
+ * MAXIM MAX77620 GPIO driver
+ *
+ * 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.
+ */
+
+#include <linux/gpio/driver.h>
+#include <linux/interrupt.h>
+#include <linux/mfd/max77620.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+
+#define GPIO_REG_ADDR(offset) (MAX77620_REG_GPIO0 + offset)
+
+struct max77620_gpio {
+ struct gpio_chip gpio_chip;
+ struct regmap *rmap;
+ struct device *dev;
+ int gpio_irq;
+ int irq_base;
+ int gpio_base;
+};
+
+static const struct regmap_irq max77620_gpio_irqs[] = {
+ REGMAP_IRQ_REG(0, 0, MAX77620_IRQ_LVL2_GPIO_EDGE0),
+ REGMAP_IRQ_REG(1, 0, MAX77620_IRQ_LVL2_GPIO_EDGE1),
+ REGMAP_IRQ_REG(2, 0, MAX77620_IRQ_LVL2_GPIO_EDGE2),
+ REGMAP_IRQ_REG(3, 0, MAX77620_IRQ_LVL2_GPIO_EDGE3),
+ REGMAP_IRQ_REG(4, 0, MAX77620_IRQ_LVL2_GPIO_EDGE4),
+ REGMAP_IRQ_REG(5, 0, MAX77620_IRQ_LVL2_GPIO_EDGE5),
+ REGMAP_IRQ_REG(6, 0, MAX77620_IRQ_LVL2_GPIO_EDGE6),
+ REGMAP_IRQ_REG(7, 0, MAX77620_IRQ_LVL2_GPIO_EDGE7),
+};
+
+static struct regmap_irq_chip max77620_gpio_irq_chip = {
+ .name = "max77620-gpio",
+ .irqs = max77620_gpio_irqs,
+ .num_irqs = ARRAY_SIZE(max77620_gpio_irqs),
+ .num_regs = 1,
+ .irq_reg_stride = 1,
+ .status_base = MAX77620_REG_IRQ_LVL2_GPIO,
+};
+
+static int max77620_gpio_dir_input(struct gpio_chip *gc, unsigned int offset)
+{
+ struct max77620_gpio *mgpio = gpiochip_get_data(gc);
+ int ret;
+
+ ret = regmap_update_bits(mgpio->rmap, GPIO_REG_ADDR(offset),
+ MAX77620_CNFG_GPIO_DIR_MASK,
+ MAX77620_CNFG_GPIO_DIR_INPUT);
+ if (ret < 0)
+ dev_err(mgpio->dev, "CNFG_GPIOx dir update failed: %d\n", ret);
+
+ return ret;
+}
+
+static int max77620_gpio_get(struct gpio_chip *gc, unsigned int offset)
+{
+ struct max77620_gpio *mgpio = gpiochip_get_data(gc);
+ unsigned int val;
+ int ret;
+
+ ret = regmap_read(mgpio->rmap, GPIO_REG_ADDR(offset), &val);
+ if (ret < 0) {
+ dev_err(mgpio->dev, "CNFG_GPIOx read failed: %d\n", ret);
+ return ret;
+ }
+
+ return !!(val & MAX77620_CNFG_GPIO_INPUT_VAL_MASK);
+}
+
+static int max77620_gpio_dir_output(struct gpio_chip *gc, unsigned int offset,
+ int value)
+{
+ struct max77620_gpio *mgpio = gpiochip_get_data(gc);
+ u8 val;
+ int ret;
+
+ val = (value) ? MAX77620_CNFG_GPIO_OUTPUT_VAL_HIGH :
+ MAX77620_CNFG_GPIO_OUTPUT_VAL_LOW;
+
+ ret = regmap_update_bits(mgpio->rmap, GPIO_REG_ADDR(offset),
+ MAX77620_CNFG_GPIO_OUTPUT_VAL_MASK, val);
+ if (ret < 0) {
+ dev_err(mgpio->dev, "CNFG_GPIOx val update failed: %d\n", ret);
+ return ret;
+ }
+
+ ret = regmap_update_bits(mgpio->rmap, GPIO_REG_ADDR(offset),
+ MAX77620_CNFG_GPIO_DIR_MASK,
+ MAX77620_CNFG_GPIO_DIR_OUTPUT);
+ if (ret < 0)
+ dev_err(mgpio->dev, "CNFG_GPIOx dir update failed: %d\n", ret);
+
+ return ret;
+}
+
+static int max77620_gpio_set_debounce(struct gpio_chip *gc,
+ unsigned int offset,
+ unsigned int debounce)
+{
+ struct max77620_gpio *mgpio = gpiochip_get_data(gc);
+ u8 val;
+ int ret;
+
+ switch (debounce) {
+ case 0:
+ val = MAX77620_CNFG_GPIO_DBNC_None;
+ break;
+ case 1 ... 8:
+ val = MAX77620_CNFG_GPIO_DBNC_8ms;
+ break;
+ case 9 ... 16:
+ val = MAX77620_CNFG_GPIO_DBNC_16ms;
+ break;
+ case 17 ... 32:
+ val = MAX77620_CNFG_GPIO_DBNC_32ms;
+ break;
+ default:
+ dev_err(mgpio->dev, "Illegal value %u\n", debounce);
+ return -EINVAL;
+ }
+
+ ret = regmap_update_bits(mgpio->rmap, GPIO_REG_ADDR(offset),
+ MAX77620_CNFG_GPIO_DBNC_MASK, val);
+ if (ret < 0)
+ dev_err(mgpio->dev, "CNFG_GPIOx_DBNC update failed: %d\n", ret);
+
+ return ret;
+}
+
+static void max77620_gpio_set(struct gpio_chip *gc, unsigned int offset,
+ int value)
+{
+ struct max77620_gpio *mgpio = gpiochip_get_data(gc);
+ u8 val;
+ int ret;
+
+ val = (value) ? MAX77620_CNFG_GPIO_OUTPUT_VAL_HIGH :
+ MAX77620_CNFG_GPIO_OUTPUT_VAL_LOW;
+
+ ret = regmap_update_bits(mgpio->rmap, GPIO_REG_ADDR(offset),
+ MAX77620_CNFG_GPIO_OUTPUT_VAL_MASK, val);
+ if (ret < 0)
+ dev_err(mgpio->dev, "CNFG_GPIO_OUT update failed: %d\n", ret);
+}
+
+static int max77620_gpio_to_irq(struct gpio_chip *gc, unsigned int offset)
+{
+ struct max77620_gpio *mgpio = gpiochip_get_data(gc);
+ struct max77620_chip *chip = dev_get_drvdata(mgpio->dev->parent);
+
+ return regmap_irq_get_virq(chip->gpio_irq_data, offset);
+}
+
+static int max77620_gpio_probe(struct platform_device *pdev)
+{
+ struct max77620_chip *chip = dev_get_drvdata(pdev->dev.parent);
+ struct max77620_gpio *mgpio;
+ int gpio_irq;
+ int ret;
+
+ gpio_irq = platform_get_irq(pdev, 0);
+ if (gpio_irq <= 0) {
+ dev_err(&pdev->dev, "GPIO irq not available %d\n", gpio_irq);
+ return -ENODEV;
+ }
+
+ mgpio = devm_kzalloc(&pdev->dev, sizeof(*mgpio), GFP_KERNEL);
+ if (!mgpio)
+ return -ENOMEM;
+
+ mgpio->rmap = chip->rmap;
+ mgpio->dev = &pdev->dev;
+ mgpio->gpio_irq = gpio_irq;
+
+ mgpio->gpio_chip.label = pdev->name;
+ mgpio->gpio_chip.parent = &pdev->dev;
+ mgpio->gpio_chip.direction_input = max77620_gpio_dir_input;
+ mgpio->gpio_chip.get = max77620_gpio_get;
+ mgpio->gpio_chip.direction_output = max77620_gpio_dir_output;
+ mgpio->gpio_chip.set_debounce = max77620_gpio_set_debounce;
+ mgpio->gpio_chip.set = max77620_gpio_set;
+ mgpio->gpio_chip.to_irq = max77620_gpio_to_irq;
+ mgpio->gpio_chip.ngpio = MAX77620_GPIO_NR;
+ mgpio->gpio_chip.can_sleep = 1;
+ mgpio->gpio_chip.base = -1;
+ mgpio->irq_base = -1;
+#ifdef CONFIG_OF_GPIO
+ mgpio->gpio_chip.of_node = pdev->dev.parent->of_node;
+#endif
+
+ platform_set_drvdata(pdev, mgpio);
+
+ ret = devm_gpiochip_add_data(&pdev->dev, &mgpio->gpio_chip, mgpio);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "gpio_init: Failed to add max77620_gpio\n");
+ return ret;
+ }
+
+ mgpio->gpio_base = mgpio->gpio_chip.base;
+ ret = devm_regmap_add_irq_chip(&pdev->dev, chip->rmap, mgpio->gpio_irq,
+ IRQF_ONESHOT, mgpio->irq_base,
+ &max77620_gpio_irq_chip,
+ &chip->gpio_irq_data);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "Failed to add gpio irq_chip %d\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static const struct platform_device_id max77620_gpio_devtype[] = {
+ { .name = "max77620-gpio", },
+ {},
+};
+MODULE_DEVICE_TABLE(platform, max77620_gpio_devtype);
+
+static struct platform_driver max77620_gpio_driver = {
+ .driver.name = "max77620-gpio",
+ .probe = max77620_gpio_probe,
+ .id_table = max77620_gpio_devtype,
+};
+
+module_platform_driver(max77620_gpio_driver);
+
+MODULE_DESCRIPTION("GPIO interface for MAX77620 and MAX20024 PMIC");
+MODULE_AUTHOR("Laxman Dewangan <ldewangan@nvidia.com>");
+MODULE_AUTHOR("Chaitanya Bandi <bandik@nvidia.com>");
+MODULE_ALIAS("platform:max77620-gpio");
+MODULE_LICENSE("GPL v2");
--
2.1.4
^ permalink raw reply related [flat|nested] 12+ messages in thread* [PATCH V12 2/2] pinctrl: max77620: add pincontrol driver for MAX77620/MAX20024
2016-05-13 5:19 [PATCH V12 1/2] gpio: add DT binding doc for gpio of PMIC max77620/max20024 Laxman Dewangan
2016-05-13 5:19 ` [PATCH V12 1/2] pinctrl: add DT binding doc for pincontrol " Laxman Dewangan
2016-05-13 5:19 ` [PATCH V12 2/2] gpio: max77620: add gpio driver for MAX77620/MAX20024 Laxman Dewangan
@ 2016-05-13 5:19 ` Laxman Dewangan
2016-05-24 11:21 ` Linus Walleij
2016-05-24 11:07 ` [PATCH V12 1/2] gpio: add DT binding doc for gpio of PMIC max77620/max20024 Linus Walleij
3 siblings, 1 reply; 12+ messages in thread
From: Laxman Dewangan @ 2016-05-13 5:19 UTC (permalink / raw)
To: linus.walleij, robh+dt
Cc: devicetree, linux-kernel, linux-gpio, Laxman Dewangan
MAXIM Semiconductor's PMIC, MAX77620/MAX20024 has 8 GPIO pins
which also act as the special function in alternate mode. Also
there is configuration like push-pull, open drain, FPS timing
etc for these pins.
Add pin control driver to configure these parameters through
pin control APIs.
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
---
This was part of the max77620 series and mfd is merged. So it
can go in subsystem wise.
Changes from V1:
- Cleanup code based on comment received on mfd/rtc.
- Avoid duplication on error message.
Changes form V2:
- Run coccicheck and checkpatch in strict mode for the alignment.
- update based on api changes from core.
Changes from V3:
- Change all sys initcall to module driver.
- change the max77620_read argument to unisgned int from u8.
Changes from V4:
- Added DT binding document as devicetree/bindings/pinctrl/pinctrl-max77620.txt
- Detail out properties as per review comment.
Changes from V5:
- Separate out DT binding doc for pincontrol.
- Added reviewed by for Linus W
Changes from V6:
- Use regmap APIs direct instead of max77620 abstraction APIs.
Changes from V7:
- None
Changes from V8:
- Run checkpatch --strict on final patch and fixes issue and changed
unsigned to unsigned int.
Changes from V9:
None
Changes from V10:
Use new APIs for the dt_free_map.
Changes from V11:
- Change bool to tristate for the CONFIG.
- Use devm_pinctrl_tegister and get rid of remove callback.
---
drivers/pinctrl/Kconfig | 10 +
drivers/pinctrl/Makefile | 1 +
drivers/pinctrl/pinctrl-max77620.c | 678 +++++++++++++++++++++++++++++++++++++
3 files changed, 689 insertions(+)
create mode 100644 drivers/pinctrl/pinctrl-max77620.c
diff --git a/drivers/pinctrl/Kconfig b/drivers/pinctrl/Kconfig
index fb8200b..612547c 100644
--- a/drivers/pinctrl/Kconfig
+++ b/drivers/pinctrl/Kconfig
@@ -196,6 +196,16 @@ config PINCTRL_COH901
COH 901 335 and COH 901 571/3. They contain 3, 5 or 7
ports of 8 GPIO pins each.
+config PINCTRL_MAX77620
+ tristate "MAX77620/MAX20024 Pincontrol support"
+ depends on MFD_MAX77620
+ select GENERIC_PINCONF
+ help
+ Say Yes here to enable Pin control support for Maxim PMIC MAX77620.
+ This PMIC has 8 GPIO pins that work as GPIO as well as special
+ function in alternate mode. This driver also configure push-pull,
+ open drain, FPS slots etc.
+
config PINCTRL_PALMAS
bool "Pinctrl driver for the PALMAS Series MFD devices"
depends on OF && MFD_PALMAS
diff --git a/drivers/pinctrl/Makefile b/drivers/pinctrl/Makefile
index e4bc115..d6f349c 100644
--- a/drivers/pinctrl/Makefile
+++ b/drivers/pinctrl/Makefile
@@ -17,6 +17,7 @@ obj-$(CONFIG_PINCTRL_AMD) += pinctrl-amd.o
obj-$(CONFIG_PINCTRL_DIGICOLOR) += pinctrl-digicolor.o
obj-$(CONFIG_PINCTRL_FALCON) += pinctrl-falcon.o
obj-$(CONFIG_PINCTRL_MESON) += meson/
+obj-$(CONFIG_PINCTRL_MAX77620) += pinctrl-max77620.o
obj-$(CONFIG_PINCTRL_PALMAS) += pinctrl-palmas.o
obj-$(CONFIG_PINCTRL_PIC32) += pinctrl-pic32.o
obj-$(CONFIG_PINCTRL_PISTACHIO) += pinctrl-pistachio.o
diff --git a/drivers/pinctrl/pinctrl-max77620.c b/drivers/pinctrl/pinctrl-max77620.c
new file mode 100644
index 0000000..19005a0
--- /dev/null
+++ b/drivers/pinctrl/pinctrl-max77620.c
@@ -0,0 +1,678 @@
+/*
+ * MAX77620 pin control driver.
+ *
+ * Copyright (c) 2016, NVIDIA CORPORATION. All rights reserved.
+ *
+ * Author:
+ * Chaitanya Bandi <bandik@nvidia.com>
+ * Laxman Dewangan <ldewangan@nvidia.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.
+ */
+
+#include <linux/mfd/max77620.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/pinctrl/pinctrl.h>
+#include <linux/pinctrl/pinconf-generic.h>
+#include <linux/pinctrl/pinconf.h>
+#include <linux/pinctrl/pinmux.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+
+#include "core.h"
+#include "pinconf.h"
+#include "pinctrl-utils.h"
+
+#define MAX77620_PIN_NUM 8
+
+enum max77620_pin_ppdrv {
+ MAX77620_PIN_UNCONFIG_DRV,
+ MAX77620_PIN_OD_DRV,
+ MAX77620_PIN_PP_DRV,
+};
+
+enum max77620_pinconf_param {
+ MAX77620_ACTIVE_FPS_SOURCE = PIN_CONFIG_END + 1,
+ MAX77620_ACTIVE_FPS_POWER_ON_SLOTS,
+ MAX77620_ACTIVE_FPS_POWER_DOWN_SLOTS,
+ MAX77620_SUSPEND_FPS_SOURCE,
+ MAX77620_SUSPEND_FPS_POWER_ON_SLOTS,
+ MAX77620_SUSPEND_FPS_POWER_DOWN_SLOTS,
+};
+
+struct max77620_pin_function {
+ const char *name;
+ const char * const *groups;
+ unsigned int ngroups;
+ int mux_option;
+};
+
+struct max77620_cfg_param {
+ const char *property;
+ enum max77620_pinconf_param param;
+};
+
+static const struct pinconf_generic_params max77620_cfg_params[] = {
+ {
+ .property = "maxim,active-fps-source",
+ .param = MAX77620_ACTIVE_FPS_SOURCE,
+ }, {
+ .property = "maxim,active-fps-power-up-slot",
+ .param = MAX77620_ACTIVE_FPS_POWER_ON_SLOTS,
+ }, {
+ .property = "maxim,active-fps-power-down-slot",
+ .param = MAX77620_ACTIVE_FPS_POWER_DOWN_SLOTS,
+ }, {
+ .property = "maxim,suspend-fps-source",
+ .param = MAX77620_SUSPEND_FPS_SOURCE,
+ }, {
+ .property = "maxim,suspend-fps-power-up-slot",
+ .param = MAX77620_SUSPEND_FPS_POWER_ON_SLOTS,
+ }, {
+ .property = "maxim,suspend-fps-power-down-slot",
+ .param = MAX77620_SUSPEND_FPS_POWER_DOWN_SLOTS,
+ },
+};
+
+enum max77620_alternate_pinmux_option {
+ MAX77620_PINMUX_GPIO = 0,
+ MAX77620_PINMUX_LOW_POWER_MODE_CONTROL_IN = 1,
+ MAX77620_PINMUX_FLEXIBLE_POWER_SEQUENCER_OUT = 2,
+ MAX77620_PINMUX_32K_OUT1 = 3,
+ MAX77620_PINMUX_SD0_DYNAMIC_VOLTAGE_SCALING_IN = 4,
+ MAX77620_PINMUX_SD1_DYNAMIC_VOLTAGE_SCALING_IN = 5,
+ MAX77620_PINMUX_REFERENCE_OUT = 6,
+};
+
+struct max77620_pingroup {
+ const char *name;
+ const unsigned int pins[1];
+ unsigned int npins;
+ enum max77620_alternate_pinmux_option alt_option;
+};
+
+struct max77620_pin_info {
+ enum max77620_pin_ppdrv drv_type;
+ int pull_config;
+};
+
+struct max77620_fps_config {
+ int active_fps_src;
+ int active_power_up_slots;
+ int active_power_down_slots;
+ int suspend_fps_src;
+ int suspend_power_up_slots;
+ int suspend_power_down_slots;
+};
+
+struct max77620_pctrl_info {
+ struct device *dev;
+ struct pinctrl_dev *pctl;
+ struct regmap *rmap;
+ int pins_current_opt[MAX77620_GPIO_NR];
+ const struct max77620_pin_function *functions;
+ unsigned int num_functions;
+ const struct max77620_pingroup *pin_groups;
+ int num_pin_groups;
+ const struct pinctrl_pin_desc *pins;
+ unsigned int num_pins;
+ struct max77620_pin_info pin_info[MAX77620_PIN_NUM];
+ struct max77620_fps_config fps_config[MAX77620_PIN_NUM];
+};
+
+static const struct pinctrl_pin_desc max77620_pins_desc[] = {
+ PINCTRL_PIN(MAX77620_GPIO0, "gpio0"),
+ PINCTRL_PIN(MAX77620_GPIO1, "gpio1"),
+ PINCTRL_PIN(MAX77620_GPIO2, "gpio2"),
+ PINCTRL_PIN(MAX77620_GPIO3, "gpio3"),
+ PINCTRL_PIN(MAX77620_GPIO4, "gpio4"),
+ PINCTRL_PIN(MAX77620_GPIO5, "gpio5"),
+ PINCTRL_PIN(MAX77620_GPIO6, "gpio6"),
+ PINCTRL_PIN(MAX77620_GPIO7, "gpio7"),
+};
+
+static const char * const gpio_groups[] = {
+ "gpio0",
+ "gpio1",
+ "gpio2",
+ "gpio3",
+ "gpio4",
+ "gpio5",
+ "gpio6",
+ "gpio7",
+};
+
+#define FUNCTION_GROUP(fname, mux) \
+ { \
+ .name = fname, \
+ .groups = gpio_groups, \
+ .ngroups = ARRAY_SIZE(gpio_groups), \
+ .mux_option = MAX77620_PINMUX_##mux, \
+ }
+
+static const struct max77620_pin_function max77620_pin_function[] = {
+ FUNCTION_GROUP("gpio", GPIO),
+ FUNCTION_GROUP("lpm-control-in", LOW_POWER_MODE_CONTROL_IN),
+ FUNCTION_GROUP("fps-out", FLEXIBLE_POWER_SEQUENCER_OUT),
+ FUNCTION_GROUP("32k-out1", 32K_OUT1),
+ FUNCTION_GROUP("sd0-dvs-in", SD0_DYNAMIC_VOLTAGE_SCALING_IN),
+ FUNCTION_GROUP("sd1-dvs-in", SD1_DYNAMIC_VOLTAGE_SCALING_IN),
+ FUNCTION_GROUP("reference-out", REFERENCE_OUT),
+};
+
+#define MAX77620_PINGROUP(pg_name, pin_id, option) \
+ { \
+ .name = #pg_name, \
+ .pins = {MAX77620_##pin_id}, \
+ .npins = 1, \
+ .alt_option = MAX77620_PINMUX_##option, \
+ }
+
+static const struct max77620_pingroup max77620_pingroups[] = {
+ MAX77620_PINGROUP(gpio0, GPIO0, LOW_POWER_MODE_CONTROL_IN),
+ MAX77620_PINGROUP(gpio1, GPIO1, FLEXIBLE_POWER_SEQUENCER_OUT),
+ MAX77620_PINGROUP(gpio2, GPIO2, FLEXIBLE_POWER_SEQUENCER_OUT),
+ MAX77620_PINGROUP(gpio3, GPIO3, FLEXIBLE_POWER_SEQUENCER_OUT),
+ MAX77620_PINGROUP(gpio4, GPIO4, 32K_OUT1),
+ MAX77620_PINGROUP(gpio5, GPIO5, SD0_DYNAMIC_VOLTAGE_SCALING_IN),
+ MAX77620_PINGROUP(gpio6, GPIO6, SD1_DYNAMIC_VOLTAGE_SCALING_IN),
+ MAX77620_PINGROUP(gpio7, GPIO7, REFERENCE_OUT),
+};
+
+static int max77620_pinctrl_get_groups_count(struct pinctrl_dev *pctldev)
+{
+ struct max77620_pctrl_info *mpci = pinctrl_dev_get_drvdata(pctldev);
+
+ return mpci->num_pin_groups;
+}
+
+static const char *max77620_pinctrl_get_group_name(
+ struct pinctrl_dev *pctldev, unsigned int group)
+{
+ struct max77620_pctrl_info *mpci = pinctrl_dev_get_drvdata(pctldev);
+
+ return mpci->pin_groups[group].name;
+}
+
+static int max77620_pinctrl_get_group_pins(
+ struct pinctrl_dev *pctldev, unsigned int group,
+ const unsigned int **pins, unsigned int *num_pins)
+{
+ struct max77620_pctrl_info *mpci = pinctrl_dev_get_drvdata(pctldev);
+
+ *pins = mpci->pin_groups[group].pins;
+ *num_pins = mpci->pin_groups[group].npins;
+
+ return 0;
+}
+
+static const struct pinctrl_ops max77620_pinctrl_ops = {
+ .get_groups_count = max77620_pinctrl_get_groups_count,
+ .get_group_name = max77620_pinctrl_get_group_name,
+ .get_group_pins = max77620_pinctrl_get_group_pins,
+ .dt_node_to_map = pinconf_generic_dt_node_to_map_pin,
+ .dt_free_map = pinctrl_utils_free_map,
+};
+
+static int max77620_pinctrl_get_funcs_count(struct pinctrl_dev *pctldev)
+{
+ struct max77620_pctrl_info *mpci = pinctrl_dev_get_drvdata(pctldev);
+
+ return mpci->num_functions;
+}
+
+static const char *max77620_pinctrl_get_func_name(struct pinctrl_dev *pctldev,
+ unsigned int function)
+{
+ struct max77620_pctrl_info *mpci = pinctrl_dev_get_drvdata(pctldev);
+
+ return mpci->functions[function].name;
+}
+
+static int max77620_pinctrl_get_func_groups(struct pinctrl_dev *pctldev,
+ unsigned int function,
+ const char * const **groups,
+ unsigned int * const num_groups)
+{
+ struct max77620_pctrl_info *mpci = pinctrl_dev_get_drvdata(pctldev);
+
+ *groups = mpci->functions[function].groups;
+ *num_groups = mpci->functions[function].ngroups;
+
+ return 0;
+}
+
+static int max77620_pinctrl_enable(struct pinctrl_dev *pctldev,
+ unsigned int function, unsigned int group)
+{
+ struct max77620_pctrl_info *mpci = pinctrl_dev_get_drvdata(pctldev);
+ u8 val;
+ int ret;
+
+ if (function == MAX77620_PINMUX_GPIO) {
+ val = 0;
+ } else if (function == mpci->pin_groups[group].alt_option) {
+ val = 1 << group;
+ } else {
+ dev_err(mpci->dev, "GPIO %u doesn't have function %u\n",
+ group, function);
+ return -EINVAL;
+ }
+ ret = regmap_update_bits(mpci->rmap, MAX77620_REG_AME_GPIO,
+ BIT(group), val);
+ if (ret < 0)
+ dev_err(mpci->dev, "REG AME GPIO update failed: %d\n", ret);
+
+ return ret;
+}
+
+static const struct pinmux_ops max77620_pinmux_ops = {
+ .get_functions_count = max77620_pinctrl_get_funcs_count,
+ .get_function_name = max77620_pinctrl_get_func_name,
+ .get_function_groups = max77620_pinctrl_get_func_groups,
+ .set_mux = max77620_pinctrl_enable,
+};
+
+static int max77620_pinconf_get(struct pinctrl_dev *pctldev,
+ unsigned int pin, unsigned long *config)
+{
+ struct max77620_pctrl_info *mpci = pinctrl_dev_get_drvdata(pctldev);
+ struct device *dev = mpci->dev;
+ enum pin_config_param param = pinconf_to_config_param(*config);
+ unsigned int val;
+ int arg = 0;
+ int ret;
+
+ switch (param) {
+ case PIN_CONFIG_DRIVE_OPEN_DRAIN:
+ if (mpci->pin_info[pin].drv_type == MAX77620_PIN_OD_DRV)
+ arg = 1;
+ break;
+
+ case PIN_CONFIG_DRIVE_PUSH_PULL:
+ if (mpci->pin_info[pin].drv_type == MAX77620_PIN_PP_DRV)
+ arg = 1;
+ break;
+
+ case PIN_CONFIG_BIAS_PULL_UP:
+ ret = regmap_read(mpci->rmap, MAX77620_REG_PUE_GPIO, &val);
+ if (ret < 0) {
+ dev_err(dev, "Reg PUE_GPIO read failed: %d\n", ret);
+ return ret;
+ }
+ if (val & BIT(pin))
+ arg = 1;
+ break;
+
+ case PIN_CONFIG_BIAS_PULL_DOWN:
+ ret = regmap_read(mpci->rmap, MAX77620_REG_PDE_GPIO, &val);
+ if (ret < 0) {
+ dev_err(dev, "Reg PDE_GPIO read failed: %d\n", ret);
+ return ret;
+ }
+ if (val & BIT(pin))
+ arg = 1;
+ break;
+
+ default:
+ dev_err(dev, "Properties not supported\n");
+ return -ENOTSUPP;
+ }
+
+ *config = pinconf_to_config_packed(param, (u16)arg);
+
+ return 0;
+}
+
+static int max77620_get_default_fps(struct max77620_pctrl_info *mpci,
+ int addr, int *fps)
+{
+ unsigned int val;
+ int ret;
+
+ ret = regmap_read(mpci->rmap, addr, &val);
+ if (ret < 0) {
+ dev_err(mpci->dev, "Reg PUE_GPIO read failed: %d\n", ret);
+ return ret;
+ }
+ *fps = (val & MAX77620_FPS_SRC_MASK) >> MAX77620_FPS_SRC_SHIFT;
+
+ return 0;
+}
+
+static int max77620_set_fps_param(struct max77620_pctrl_info *mpci,
+ int pin, int param)
+{
+ struct max77620_fps_config *fps_config = &mpci->fps_config[pin];
+ int addr, ret;
+ int param_val;
+ int mask, shift;
+
+ if ((pin < MAX77620_GPIO1) || (pin > MAX77620_GPIO3))
+ return 0;
+
+ addr = MAX77620_REG_FPS_GPIO1 + pin - 1;
+ switch (param) {
+ case MAX77620_ACTIVE_FPS_SOURCE:
+ case MAX77620_SUSPEND_FPS_SOURCE:
+ mask = MAX77620_FPS_SRC_MASK;
+ shift = MAX77620_FPS_SRC_SHIFT;
+ param_val = fps_config->active_fps_src;
+ if (param == MAX77620_SUSPEND_FPS_SOURCE)
+ param_val = fps_config->suspend_fps_src;
+ break;
+
+ case MAX77620_ACTIVE_FPS_POWER_ON_SLOTS:
+ case MAX77620_SUSPEND_FPS_POWER_ON_SLOTS:
+ mask = MAX77620_FPS_PU_PERIOD_MASK;
+ shift = MAX77620_FPS_PU_PERIOD_SHIFT;
+ param_val = fps_config->active_power_up_slots;
+ if (param == MAX77620_SUSPEND_FPS_POWER_ON_SLOTS)
+ param_val = fps_config->suspend_power_up_slots;
+ break;
+
+ case MAX77620_ACTIVE_FPS_POWER_DOWN_SLOTS:
+ case MAX77620_SUSPEND_FPS_POWER_DOWN_SLOTS:
+ mask = MAX77620_FPS_PD_PERIOD_MASK;
+ shift = MAX77620_FPS_PD_PERIOD_SHIFT;
+ param_val = fps_config->active_power_down_slots;
+ if (param == MAX77620_SUSPEND_FPS_POWER_DOWN_SLOTS)
+ param_val = fps_config->suspend_power_down_slots;
+ break;
+
+ default:
+ dev_err(mpci->dev, "Invalid parameter %d for pin %d\n",
+ param, pin);
+ return -EINVAL;
+ }
+
+ if (param_val < 0)
+ return 0;
+
+ ret = regmap_update_bits(mpci->rmap, addr, mask, param_val << shift);
+ if (ret < 0)
+ dev_err(mpci->dev, "Reg 0x%02x update failed %d\n", addr, ret);
+
+ return ret;
+}
+
+static int max77620_pinconf_set(struct pinctrl_dev *pctldev,
+ unsigned int pin, unsigned long *configs,
+ unsigned int num_configs)
+{
+ struct max77620_pctrl_info *mpci = pinctrl_dev_get_drvdata(pctldev);
+ struct device *dev = mpci->dev;
+ struct max77620_fps_config *fps_config;
+ int param;
+ u16 param_val;
+ unsigned int val;
+ unsigned int pu_val;
+ unsigned int pd_val;
+ int addr, ret;
+ int i;
+
+ for (i = 0; i < num_configs; i++) {
+ param = pinconf_to_config_param(configs[i]);
+ param_val = pinconf_to_config_argument(configs[i]);
+
+ switch (param) {
+ case PIN_CONFIG_DRIVE_OPEN_DRAIN:
+ val = param_val ? 0 : 1;
+ ret = regmap_update_bits(mpci->rmap,
+ MAX77620_REG_GPIO0 + pin,
+ MAX77620_CNFG_GPIO_DRV_MASK,
+ val);
+ if (ret < 0) {
+ dev_err(dev, "Reg 0x%02x update failed %d\n",
+ MAX77620_REG_GPIO0 + pin, ret);
+ return ret;
+ }
+ mpci->pin_info[pin].drv_type = val ?
+ MAX77620_PIN_PP_DRV : MAX77620_PIN_OD_DRV;
+ break;
+
+ case PIN_CONFIG_DRIVE_PUSH_PULL:
+ val = param_val ? 1 : 0;
+ ret = regmap_update_bits(mpci->rmap,
+ MAX77620_REG_GPIO0 + pin,
+ MAX77620_CNFG_GPIO_DRV_MASK,
+ val);
+ if (ret < 0) {
+ dev_err(dev, "Reg 0x%02x update failed %d\n",
+ MAX77620_REG_GPIO0 + pin, ret);
+ return ret;
+ }
+ mpci->pin_info[pin].drv_type = val ?
+ MAX77620_PIN_PP_DRV : MAX77620_PIN_OD_DRV;
+ break;
+
+ case MAX77620_ACTIVE_FPS_SOURCE:
+ case MAX77620_ACTIVE_FPS_POWER_ON_SLOTS:
+ case MAX77620_ACTIVE_FPS_POWER_DOWN_SLOTS:
+ if ((pin < MAX77620_GPIO1) || (pin > MAX77620_GPIO3))
+ return -EINVAL;
+
+ fps_config = &mpci->fps_config[pin];
+
+ if ((param == MAX77620_ACTIVE_FPS_SOURCE) &&
+ (param_val == MAX77620_FPS_SRC_DEF)) {
+ addr = MAX77620_REG_FPS_GPIO1 + pin - 1;
+ ret = max77620_get_default_fps(
+ mpci, addr,
+ &fps_config->active_fps_src);
+ if (ret < 0)
+ return ret;
+ break;
+ }
+
+ if (param == MAX77620_ACTIVE_FPS_SOURCE)
+ fps_config->active_fps_src = param_val;
+ else if (param == MAX77620_ACTIVE_FPS_POWER_ON_SLOTS)
+ fps_config->active_power_up_slots = param_val;
+ else
+ fps_config->active_power_down_slots = param_val;
+
+ ret = max77620_set_fps_param(mpci, pin, param);
+ if (ret < 0)
+ return ret;
+ break;
+
+ case MAX77620_SUSPEND_FPS_SOURCE:
+ case MAX77620_SUSPEND_FPS_POWER_ON_SLOTS:
+ case MAX77620_SUSPEND_FPS_POWER_DOWN_SLOTS:
+ if ((pin < MAX77620_GPIO1) || (pin > MAX77620_GPIO3))
+ return -EINVAL;
+
+ fps_config = &mpci->fps_config[pin];
+
+ if ((param == MAX77620_SUSPEND_FPS_SOURCE) &&
+ (param_val == MAX77620_FPS_SRC_DEF)) {
+ addr = MAX77620_REG_FPS_GPIO1 + pin - 1;
+ ret = max77620_get_default_fps(
+ mpci, addr,
+ &fps_config->suspend_fps_src);
+ if (ret < 0)
+ return ret;
+ break;
+ }
+
+ if (param == MAX77620_SUSPEND_FPS_SOURCE)
+ fps_config->suspend_fps_src = param_val;
+ else if (param == MAX77620_SUSPEND_FPS_POWER_ON_SLOTS)
+ fps_config->suspend_power_up_slots = param_val;
+ else
+ fps_config->suspend_power_down_slots =
+ param_val;
+ break;
+
+ case PIN_CONFIG_BIAS_PULL_UP:
+ case PIN_CONFIG_BIAS_PULL_DOWN:
+ pu_val = (param == PIN_CONFIG_BIAS_PULL_UP) ?
+ BIT(pin) : 0;
+ pd_val = (param == PIN_CONFIG_BIAS_PULL_DOWN) ?
+ BIT(pin) : 0;
+
+ ret = regmap_update_bits(mpci->rmap,
+ MAX77620_REG_PUE_GPIO,
+ BIT(pin), pu_val);
+ if (ret < 0) {
+ dev_err(dev, "PUE_GPIO update failed: %d\n",
+ ret);
+ return ret;
+ }
+
+ ret = regmap_update_bits(mpci->rmap,
+ MAX77620_REG_PDE_GPIO,
+ BIT(pin), pd_val);
+ if (ret < 0) {
+ dev_err(dev, "PDE_GPIO update failed: %d\n",
+ ret);
+ return ret;
+ }
+ break;
+
+ default:
+ dev_err(dev, "Properties not supported\n");
+ return -ENOTSUPP;
+ }
+ }
+
+ return 0;
+}
+
+static const struct pinconf_ops max77620_pinconf_ops = {
+ .pin_config_get = max77620_pinconf_get,
+ .pin_config_set = max77620_pinconf_set,
+};
+
+static struct pinctrl_desc max77620_pinctrl_desc = {
+ .pctlops = &max77620_pinctrl_ops,
+ .pmxops = &max77620_pinmux_ops,
+ .confops = &max77620_pinconf_ops,
+};
+
+static int max77620_pinctrl_probe(struct platform_device *pdev)
+{
+ struct max77620_chip *max77620 = dev_get_drvdata(pdev->dev.parent);
+ struct max77620_pctrl_info *mpci;
+ int i;
+
+ mpci = devm_kzalloc(&pdev->dev, sizeof(*mpci), GFP_KERNEL);
+ if (!mpci)
+ return -ENOMEM;
+
+ mpci->dev = &pdev->dev;
+ mpci->dev->of_node = pdev->dev.parent->of_node;
+ mpci->rmap = max77620->rmap;
+
+ mpci->pins = max77620_pins_desc;
+ mpci->num_pins = ARRAY_SIZE(max77620_pins_desc);
+ mpci->functions = max77620_pin_function;
+ mpci->num_functions = ARRAY_SIZE(max77620_pin_function);
+ mpci->pin_groups = max77620_pingroups;
+ mpci->num_pin_groups = ARRAY_SIZE(max77620_pingroups);
+ platform_set_drvdata(pdev, mpci);
+
+ max77620_pinctrl_desc.name = dev_name(&pdev->dev);
+ max77620_pinctrl_desc.pins = max77620_pins_desc;
+ max77620_pinctrl_desc.npins = ARRAY_SIZE(max77620_pins_desc);
+ max77620_pinctrl_desc.num_custom_params =
+ ARRAY_SIZE(max77620_cfg_params);
+ max77620_pinctrl_desc.custom_params = max77620_cfg_params;
+
+ for (i = 0; i < MAX77620_PIN_NUM; ++i) {
+ mpci->fps_config[i].active_fps_src = -1;
+ mpci->fps_config[i].active_power_up_slots = -1;
+ mpci->fps_config[i].active_power_down_slots = -1;
+ mpci->fps_config[i].suspend_fps_src = -1;
+ mpci->fps_config[i].suspend_power_up_slots = -1;
+ mpci->fps_config[i].suspend_power_down_slots = -1;
+ }
+
+ mpci->pctl = devm_pinctrl_register(&pdev->dev, &max77620_pinctrl_desc,
+ mpci);
+ if (IS_ERR(mpci->pctl)) {
+ dev_err(&pdev->dev, "Couldn't register pinctrl driver\n");
+ return PTR_ERR(mpci->pctl);
+ }
+
+ return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int max77620_suspend_fps_param[] = {
+ MAX77620_SUSPEND_FPS_SOURCE,
+ MAX77620_SUSPEND_FPS_POWER_ON_SLOTS,
+ MAX77620_SUSPEND_FPS_POWER_DOWN_SLOTS,
+};
+
+static int max77620_active_fps_param[] = {
+ MAX77620_ACTIVE_FPS_SOURCE,
+ MAX77620_ACTIVE_FPS_POWER_ON_SLOTS,
+ MAX77620_ACTIVE_FPS_POWER_DOWN_SLOTS,
+};
+
+static int max77620_pinctrl_suspend(struct device *dev)
+{
+ struct max77620_pctrl_info *mpci = dev_get_drvdata(dev);
+ int pin, p;
+
+ for (pin = 0; pin < MAX77620_PIN_NUM; ++pin) {
+ if ((pin < MAX77620_GPIO1) || (pin > MAX77620_GPIO3))
+ continue;
+ for (p = 0; p < 3; ++p)
+ max77620_set_fps_param(
+ mpci, pin, max77620_suspend_fps_param[p]);
+ }
+
+ return 0;
+};
+
+static int max77620_pinctrl_resume(struct device *dev)
+{
+ struct max77620_pctrl_info *mpci = dev_get_drvdata(dev);
+ int pin, p;
+
+ for (pin = 0; pin < MAX77620_PIN_NUM; ++pin) {
+ if ((pin < MAX77620_GPIO1) || (pin > MAX77620_GPIO3))
+ continue;
+ for (p = 0; p < 3; ++p)
+ max77620_set_fps_param(
+ mpci, pin, max77620_active_fps_param[p]);
+ }
+
+ return 0;
+}
+#endif
+
+static const struct dev_pm_ops max77620_pinctrl_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(
+ max77620_pinctrl_suspend, max77620_pinctrl_resume)
+};
+
+static const struct platform_device_id max77620_pinctrl_devtype[] = {
+ { .name = "max77620-pinctrl", },
+ { .name = "max20024-pinctrl", },
+ {},
+};
+MODULE_DEVICE_TABLE(platform, max77620_pinctrl_devtype);
+
+static struct platform_driver max77620_pinctrl_driver = {
+ .driver = {
+ .name = "max77620-pinctrl",
+ .pm = &max77620_pinctrl_pm_ops,
+ },
+ .probe = max77620_pinctrl_probe,
+ .id_table = max77620_pinctrl_devtype,
+};
+
+module_platform_driver(max77620_pinctrl_driver);
+
+MODULE_DESCRIPTION("MAX77620/MAX20024 pin control driver");
+MODULE_AUTHOR("Chaitanya Bandi<bandik@nvidia.com>");
+MODULE_AUTHOR("Laxman Dewangan<ldewangan@nvidia.com>");
+MODULE_ALIAS("platform:max77620-pinctrl");
+MODULE_LICENSE("GPL v2");
--
2.1.4
^ permalink raw reply related [flat|nested] 12+ messages in thread