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Unverified Commit 37fa23db authored by Mark Brown's avatar Mark Brown
Browse files

regulator: s2mps11: Fix boot on Odroid XU3 



The change to descriptors in 0369e02b "regulator: s2mps11: Pass
descriptor instead of GPIO number" has broken the boot on Odroid XU3
according to kernelci so let's revert that for now.  We get a NULL
pointer defererence in:

[    2.467929] [] (validate_desc) from [] (gpiod_set_value_cansleep+0x14/0x30)
[    2.476591] [] (gpiod_set_value_cansleep) from [] (_regulator_do_enable+0x2f8/0x370)
[    2.486032] [] (_regulator_do_enable) from [] (regulator_register+0xc54/0x1280)
[    2.495045] [] (regulator_register) from [] (devm_regulator_register+0x40/0x7c)
[    2.504057] [] (devm_regulator_register) from [] (s2mps11_pmic_probe+0x1c0/0x444)
[    2.513243] [] (s2mps11_pmic_probe) from [] (platform_drv_probe+0x6c/0xa4)

Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent f50e5dda

drivers/regulator/s2mps11.c

+23 −23
Original line number Diff line number Diff line
@@ -18,7 +18,7 @@ 


#include <linux/bug.h>

#include <linux/err.h>

#include <linux/gpio/consumer.h>

#include <linux/gpio.h>

#include <linux/slab.h>

#include <linux/module.h>

#include <linux/of.h>
@@ -27,6 +27,7 @@ 
#include <linux/regulator/driver.h>

#include <linux/regulator/machine.h>

#include <linux/regulator/of_regulator.h>

#include <linux/of_gpio.h>

#include <linux/mfd/samsung/core.h>

#include <linux/mfd/samsung/s2mps11.h>

#include <linux/mfd/samsung/s2mps13.h>
@@ -56,7 +57,7 @@ struct s2mps11_info { 
	 * Array (size: number of regulators) with GPIO-s for external

	 * sleep control.

	 */

	struct gpio_desc **ext_control_gpiod;

	int *ext_control_gpio;

};



static int get_ramp_delay(int ramp_delay)
@@ -523,7 +524,7 @@ static int s2mps14_regulator_enable(struct regulator_dev *rdev) 
	case S2MPS14X:

		if (test_bit(rdev_get_id(rdev), s2mps11->suspend_state))

			val = S2MPS14_ENABLE_SUSPEND;

		else if (s2mps11->ext_control_gpiod[rdev_get_id(rdev)])

		else if (gpio_is_valid(s2mps11->ext_control_gpio[rdev_get_id(rdev)]))

			val = S2MPS14_ENABLE_EXT_CONTROL;

		else

			val = rdev->desc->enable_mask;
@@ -817,7 +818,7 @@ static int s2mps14_pmic_enable_ext_control(struct s2mps11_info *s2mps11, 
static void s2mps14_pmic_dt_parse_ext_control_gpio(struct platform_device *pdev,

		struct of_regulator_match *rdata, struct s2mps11_info *s2mps11)

{

	struct gpio_desc **gpio = s2mps11->ext_control_gpiod;

	int *gpio = s2mps11->ext_control_gpio;

	unsigned int i;

	unsigned int valid_regulators[3] = { S2MPS14_LDO10, S2MPS14_LDO11,

		S2MPS14_LDO12 };
@@ -828,20 +829,11 @@ static void s2mps14_pmic_dt_parse_ext_control_gpio(struct platform_device *pdev, 
		if (!rdata[reg].init_data || !rdata[reg].of_node)

			continue;



		gpio[reg] = devm_gpiod_get_from_of_node(&pdev->dev,

							rdata[reg].of_node,

							"samsung,ext-control-gpios",

							0,

							GPIOD_OUT_HIGH,

							"s2mps11-LDO");

		if (IS_ERR(gpio[reg])) {

			dev_err(&pdev->dev, "Failed to get control GPIO for %d/%s\n",

				reg, rdata[reg].name);

			continue;

		}

		if (gpio[reg])

			dev_dbg(&pdev->dev, "Using GPIO for ext-control over %d/%s\n",

				reg, rdata[reg].name);

		gpio[reg] = of_get_named_gpio(rdata[reg].of_node,

				"samsung,ext-control-gpios", 0);

		if (gpio_is_valid(gpio[reg]))

			dev_dbg(&pdev->dev, "Using GPIO %d for ext-control over %d/%s\n",

					gpio[reg], reg, rdata[reg].name);

	}

}
@@ -1147,11 +1139,17 @@ static int s2mps11_pmic_probe(struct platform_device *pdev) 
		return -EINVAL;

	}



	s2mps11->ext_control_gpiod = devm_kmalloc(&pdev->dev,

			sizeof(*s2mps11->ext_control_gpiod) * rdev_num,

	s2mps11->ext_control_gpio = devm_kmalloc(&pdev->dev,

			sizeof(*s2mps11->ext_control_gpio) * rdev_num,

			GFP_KERNEL);

	if (!s2mps11->ext_control_gpiod)

	if (!s2mps11->ext_control_gpio)

		return -ENOMEM;

	/*

	 * 0 is a valid GPIO so initialize all GPIO-s to negative value

	 * to indicate that external control won't be used for this regulator.

	 */

	for (i = 0; i < rdev_num; i++)

		s2mps11->ext_control_gpio[i] = -EINVAL;



	if (!iodev->dev->of_node) {

		if (iodev->pdata) {
@@ -1181,6 +1179,8 @@ static int s2mps11_pmic_probe(struct platform_device *pdev) 
	config.dev = &pdev->dev;

	config.regmap = iodev->regmap_pmic;

	config.driver_data = s2mps11;

	config.ena_gpio_flags = GPIOF_OUT_INIT_HIGH;

	config.ena_gpio_initialized = true;

	for (i = 0; i < rdev_num; i++) {

		struct regulator_dev *regulator;
@@ -1191,7 +1191,7 @@ static int s2mps11_pmic_probe(struct platform_device *pdev) 
			config.init_data = rdata[i].init_data;

			config.of_node = rdata[i].of_node;

		}

		config.ena_gpiod = s2mps11->ext_control_gpiod[i];

		config.ena_gpio = s2mps11->ext_control_gpio[i];



		regulator = devm_regulator_register(&pdev->dev,

						&regulators[i], &config);
@@ -1202,7 +1202,7 @@ static int s2mps11_pmic_probe(struct platform_device *pdev) 
			goto out;

		}



		if (s2mps11->ext_control_gpiod[i]) {

		if (gpio_is_valid(s2mps11->ext_control_gpio[i])) {

			ret = s2mps14_pmic_enable_ext_control(s2mps11,

					regulator);

			if (ret < 0) {