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Commit 3615a34e authored by Linus Walleij's avatar Linus Walleij Committed by Mark Brown
Browse files

regulator: add STw481x VMMC driver 



The ST Microelectronics STw481x PMIC used for the Nomadik
has one single software-controlled regulator for VMMC.
This driver registers directly to the compatible string
as there is just one regulator.

Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: default avatarMark Brown <broonie@linaro.org>
parent 272b98c6

drivers/regulator/Kconfig

+8 −0
Original line number Original line Diff line number Diff line
@@ -429,6 +429,14 @@ config REGULATOR_TI_ABB 
	  on TI SoCs may be unstable without enabling this as it provides

	  on TI SoCs may be unstable without enabling this as it provides

	  device specific optimized bias to allow/optimize functionality.

	  device specific optimized bias to allow/optimize functionality.





config REGULATOR_STW481X_VMMC

	bool "ST Microelectronics STW481X VMMC regulator"

	depends on MFD_STW481X

	default y if MFD_STW481X

	help

	  This driver supports the internal VMMC regulator in the STw481x

	  PMIC chips.



config REGULATOR_TPS51632

config REGULATOR_TPS51632

	tristate "TI TPS51632 Power Regulator"

	tristate "TI TPS51632 Power Regulator"

	depends on I2C

	depends on I2C

drivers/regulator/Makefile

+1 −0
Original line number Original line Diff line number Diff line
@@ -56,6 +56,7 @@ obj-$(CONFIG_REGULATOR_PCF50633) += pcf50633-regulator.o 
obj-$(CONFIG_REGULATOR_RC5T583)  += rc5t583-regulator.o

obj-$(CONFIG_REGULATOR_RC5T583)  += rc5t583-regulator.o

obj-$(CONFIG_REGULATOR_S2MPS11) += s2mps11.o

obj-$(CONFIG_REGULATOR_S2MPS11) += s2mps11.o

obj-$(CONFIG_REGULATOR_S5M8767) += s5m8767.o

obj-$(CONFIG_REGULATOR_S5M8767) += s5m8767.o

obj-$(CONFIG_REGULATOR_STW481X_VMMC) += stw481x-vmmc.o

obj-$(CONFIG_REGULATOR_TI_ABB) += ti-abb-regulator.o

obj-$(CONFIG_REGULATOR_TI_ABB) += ti-abb-regulator.o

obj-$(CONFIG_REGULATOR_TPS6105X) += tps6105x-regulator.o

obj-$(CONFIG_REGULATOR_TPS6105X) += tps6105x-regulator.o

obj-$(CONFIG_REGULATOR_TPS62360) += tps62360-regulator.o

obj-$(CONFIG_REGULATOR_TPS62360) += tps62360-regulator.o

drivers/regulator/stw481x-vmmc.c

0 → 100644
+110 −0
Original line number Original line Diff line number Diff line 
/*

 * Regulator driver for STw4810/STw4811 VMMC regulator.

 *

 * Copyright (C) 2013 ST-Ericsson SA

 * Written on behalf of Linaro for ST-Ericsson

 *

 * Author: Linus Walleij <linus.walleij@linaro.org>

 *

 * License terms: GNU General Public License (GPL) version 2

 */



#include <linux/err.h>

#include <linux/init.h>

#include <linux/mfd/stw481x.h>

#include <linux/module.h>

#include <linux/platform_device.h>

#include <linux/regulator/driver.h>

#include <linux/regulator/of_regulator.h>



static const unsigned int stw481x_vmmc_voltages[] = {

	1800000,

	1800000,

	2850000,

	3000000,

	1850000,

	2600000,

	2700000,

	3300000,

};



static struct regulator_ops stw481x_vmmc_ops = {

	.list_voltage = regulator_list_voltage_table,

	.enable      = regulator_enable_regmap,

	.disable     = regulator_disable_regmap,

	.is_enabled  = regulator_is_enabled_regmap,

	.get_voltage_sel = regulator_get_voltage_sel_regmap,

	.set_voltage_sel = regulator_set_voltage_sel_regmap,

};



static struct regulator_desc vmmc_regulator = {

	.name = "VMMC",

	.id   = 0,

	.ops  = &stw481x_vmmc_ops,

	.type = REGULATOR_VOLTAGE,

	.owner = THIS_MODULE,

	.n_voltages = ARRAY_SIZE(stw481x_vmmc_voltages),

	.volt_table = stw481x_vmmc_voltages,

	.enable_time = 200, /* FIXME: look this up */

	.enable_reg = STW_CONF1,

	.enable_mask = STW_CONF1_PDN_VMMC,

	.vsel_reg = STW_CONF1,

	.vsel_mask = STW_CONF1_VMMC_MASK,

};



static int stw481x_vmmc_regulator_probe(struct platform_device *pdev)

{

	struct stw481x *stw481x = dev_get_platdata(&pdev->dev);

	struct regulator_config config = { };

	int ret;



	/* First disable the external VMMC if it's active */

	ret = regmap_update_bits(stw481x->map, STW_CONF2,

				 STW_CONF2_VMMC_EXT, 0);

	if (ret) {

		dev_err(&pdev->dev, "could not disable external VMMC\n");

		return ret;

	}



	/* Register VMMC regulator */

	config.dev = &pdev->dev;

	config.driver_data = stw481x;

	config.regmap = stw481x->map;

	config.of_node = pdev->dev.of_node;

	config.init_data = of_get_regulator_init_data(&pdev->dev,

						      pdev->dev.of_node);



	stw481x->vmmc_regulator = regulator_register(&vmmc_regulator, &config);

	if (IS_ERR(stw481x->vmmc_regulator)) {

		dev_err(&pdev->dev,

			"error initializing STw481x VMMC regulator\n");

		return PTR_ERR(stw481x->vmmc_regulator);

	}



	dev_info(&pdev->dev, "initialized STw481x VMMC regulator\n");

	return 0;

}



static int stw481x_vmmc_regulator_remove(struct platform_device *pdev)

{

	struct stw481x *stw481x = dev_get_platdata(&pdev->dev);



	regulator_unregister(stw481x->vmmc_regulator);

	return 0;

}



static const struct of_device_id stw481x_vmmc_match[] = {

	{ .compatible = "st,stw481x-vmmc", },

	{},

};



static struct platform_driver stw481x_vmmc_regulator_driver = {

	.driver = {

		.name  = "stw481x-vmmc-regulator",

		.owner = THIS_MODULE,

	},

	.probe = stw481x_vmmc_regulator_probe,

	.remove = stw481x_vmmc_regulator_remove,

};



module_platform_driver(stw481x_vmmc_regulator_driver);