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linux-next/drivers/regulator/mc13783.c
Sascha Hauer 295c08bc69 regulator: Add Freescale MC13783 driver 
This driver provides basic support for the voltage regulators
integrated into the Freescale MC13783 PMIC. It is currently
only possible to enable/disable outputs, not to actually
set the voltage.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2009-09-17 09:47:19 +02:00

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/*
* Regulator Driver for Freescale MC13783 PMIC
*
* Copyright (C) 2008 Sascha Hauer, Pengutronix <s.hauer@pengutronix.de>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/mfd/mc13783-private.h>
#include <linux/regulator/machine.h>
#include <linux/regulator/driver.h>
#include <linux/platform_device.h>
#include <linux/mfd/mc13783.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/err.h>
struct mc13783_regulator {
struct regulator_desc desc;
int reg;
int enable_bit;
};
static struct regulator_ops mc13783_regulator_ops;
static struct mc13783_regulator mc13783_regulators[] = {
[MC13783_SW_SW3] = {
.desc = {
.name = "SW_SW3",
.ops = &mc13783_regulator_ops,
.type = REGULATOR_VOLTAGE,
.id = MC13783_SW_SW3,
.owner = THIS_MODULE,
},
.reg = MC13783_REG_SWITCHERS_5,
.enable_bit = MC13783_SWCTRL_SW3_EN,
},
[MC13783_SW_PLL] = {
.desc = {
.name = "SW_PLL",
.ops = &mc13783_regulator_ops,
.type = REGULATOR_VOLTAGE,
.id = MC13783_SW_PLL,
.owner = THIS_MODULE,
},
.reg = MC13783_REG_SWITCHERS_4,
.enable_bit = MC13783_SWCTRL_PLL_EN,
},
[MC13783_REGU_VAUDIO] = {
.desc = {
.name = "REGU_VAUDIO",
.ops = &mc13783_regulator_ops,
.type = REGULATOR_VOLTAGE,
.id = MC13783_REGU_VAUDIO,
.owner = THIS_MODULE,
},
.reg = MC13783_REG_REGULATOR_MODE_0,
.enable_bit = MC13783_REGCTRL_VAUDIO_EN,
},
[MC13783_REGU_VIOHI] = {
.desc = {
.name = "REGU_VIOHI",
.ops = &mc13783_regulator_ops,
.type = REGULATOR_VOLTAGE,
.id = MC13783_REGU_VIOHI,
.owner = THIS_MODULE,
},
.reg = MC13783_REG_REGULATOR_MODE_0,
.enable_bit = MC13783_REGCTRL_VIOHI_EN,
},
[MC13783_REGU_VIOLO] = {
.desc = {
.name = "REGU_VIOLO",
.ops = &mc13783_regulator_ops,
.type = REGULATOR_VOLTAGE,
.id = MC13783_REGU_VIOLO,
.owner = THIS_MODULE,
},
.reg = MC13783_REG_REGULATOR_MODE_0,
.enable_bit = MC13783_REGCTRL_VIOLO_EN,
},
[MC13783_REGU_VDIG] = {
.desc = {
.name = "REGU_VDIG",
.ops = &mc13783_regulator_ops,
.type = REGULATOR_VOLTAGE,
.id = MC13783_REGU_VDIG,
.owner = THIS_MODULE,
},
.reg = MC13783_REG_REGULATOR_MODE_0,
.enable_bit = MC13783_REGCTRL_VDIG_EN,
},
[MC13783_REGU_VGEN] = {
.desc = {
.name = "REGU_VGEN",
.ops = &mc13783_regulator_ops,
.type = REGULATOR_VOLTAGE,
.id = MC13783_REGU_VGEN,
.owner = THIS_MODULE,
},
.reg = MC13783_REG_REGULATOR_MODE_0,
.enable_bit = MC13783_REGCTRL_VGEN_EN,
},
[MC13783_REGU_VRFDIG] = {
.desc = {
.name = "REGU_VRFDIG",
.ops = &mc13783_regulator_ops,
.type = REGULATOR_VOLTAGE,
.id = MC13783_REGU_VRFDIG,
.owner = THIS_MODULE,
},
.reg = MC13783_REG_REGULATOR_MODE_0,
.enable_bit = MC13783_REGCTRL_VRFDIG_EN,
},
[MC13783_REGU_VRFREF] = {
.desc = {
.name = "REGU_VRFREF",
.ops = &mc13783_regulator_ops,
.type = REGULATOR_VOLTAGE,
.id = MC13783_REGU_VRFREF,
.owner = THIS_MODULE,
},
.reg = MC13783_REG_REGULATOR_MODE_0,
.enable_bit = MC13783_REGCTRL_VRFREF_EN,
},
[MC13783_REGU_VRFCP] = {
.desc = {
.name = "REGU_VRFCP",
.ops = &mc13783_regulator_ops,
.type = REGULATOR_VOLTAGE,
.id = MC13783_REGU_VRFCP,
.owner = THIS_MODULE,
},
.reg = MC13783_REG_REGULATOR_MODE_0,
.enable_bit = MC13783_REGCTRL_VRFCP_EN,
},
[MC13783_REGU_VSIM] = {
.desc = {
.name = "REGU_VSIM",
.ops = &mc13783_regulator_ops,
.type = REGULATOR_VOLTAGE,
.id = MC13783_REGU_VSIM,
.owner = THIS_MODULE,
},
.reg = MC13783_REG_REGULATOR_MODE_1,
.enable_bit = MC13783_REGCTRL_VSIM_EN,
},
[MC13783_REGU_VESIM] = {
.desc = {
.name = "REGU_VESIM",
.ops = &mc13783_regulator_ops,
.type = REGULATOR_VOLTAGE,
.id = MC13783_REGU_VESIM,
.owner = THIS_MODULE,
},
.reg = MC13783_REG_REGULATOR_MODE_1,
.enable_bit = MC13783_REGCTRL_VESIM_EN,
},
[MC13783_REGU_VCAM] = {
.desc = {
.name = "REGU_VCAM",
.ops = &mc13783_regulator_ops,
.type = REGULATOR_VOLTAGE,
.id = MC13783_REGU_VCAM,
.owner = THIS_MODULE,
},
.reg = MC13783_REG_REGULATOR_MODE_1,
.enable_bit = MC13783_REGCTRL_VCAM_EN,
},
[MC13783_REGU_VRFBG] = {
.desc = {
.name = "REGU_VRFBG",
.ops = &mc13783_regulator_ops,
.type = REGULATOR_VOLTAGE,
.id = MC13783_REGU_VRFBG,
.owner = THIS_MODULE,
},
.reg = MC13783_REG_REGULATOR_MODE_1,
.enable_bit = MC13783_REGCTRL_VRFBG_EN,
},
[MC13783_REGU_VVIB] = {
.desc = {
.name = "REGU_VVIB",
.ops = &mc13783_regulator_ops,
.type = REGULATOR_VOLTAGE,
.id = MC13783_REGU_VVIB,
.owner = THIS_MODULE,
},
.reg = MC13783_REG_REGULATOR_MODE_1,
.enable_bit = MC13783_REGCTRL_VVIB_EN,
},
[MC13783_REGU_VRF1] = {
.desc = {
.name = "REGU_VRF1",
.ops = &mc13783_regulator_ops,
.type = REGULATOR_VOLTAGE,
.id = MC13783_REGU_VRF1,
.owner = THIS_MODULE,
},
.reg = MC13783_REG_REGULATOR_MODE_1,
.enable_bit = MC13783_REGCTRL_VRF1_EN,
},
[MC13783_REGU_VRF2] = {
.desc = {
.name = "REGU_VRF2",
.ops = &mc13783_regulator_ops,
.type = REGULATOR_VOLTAGE,
.id = MC13783_REGU_VRF2,
.owner = THIS_MODULE,
},
.reg = MC13783_REG_REGULATOR_MODE_1,
.enable_bit = MC13783_REGCTRL_VRF2_EN,
},
[MC13783_REGU_VMMC1] = {
.desc = {
.name = "REGU_VMMC1",
.ops = &mc13783_regulator_ops,
.type = REGULATOR_VOLTAGE,
.id = MC13783_REGU_VMMC1,
.owner = THIS_MODULE,
},
.reg = MC13783_REG_REGULATOR_MODE_1,
.enable_bit = MC13783_REGCTRL_VMMC1_EN,
},
[MC13783_REGU_VMMC2] = {
.desc = {
.name = "REGU_VMMC2",
.ops = &mc13783_regulator_ops,
.type = REGULATOR_VOLTAGE,
.id = MC13783_REGU_VMMC2,
.owner = THIS_MODULE,
},
.reg = MC13783_REG_REGULATOR_MODE_1,
.enable_bit = MC13783_REGCTRL_VMMC2_EN,
},
[MC13783_REGU_GPO1] = {
.desc = {
.name = "REGU_GPO1",
.ops = &mc13783_regulator_ops,
.type = REGULATOR_VOLTAGE,
.id = MC13783_REGU_GPO1,
.owner = THIS_MODULE,
},
.reg = MC13783_REG_POWER_MISCELLANEOUS,
.enable_bit = MC13783_REGCTRL_GPO1_EN,
},
[MC13783_REGU_GPO2] = {
.desc = {
.name = "REGU_GPO2",
.ops = &mc13783_regulator_ops,
.type = REGULATOR_VOLTAGE,
.id = MC13783_REGU_GPO2,
.owner = THIS_MODULE,
},
.reg = MC13783_REG_POWER_MISCELLANEOUS,
.enable_bit = MC13783_REGCTRL_GPO2_EN,
},
[MC13783_REGU_GPO3] = {
.desc = {
.name = "REGU_GPO3",
.ops = &mc13783_regulator_ops,
.type = REGULATOR_VOLTAGE,
.id = MC13783_REGU_GPO3,
.owner = THIS_MODULE,
},
.reg = MC13783_REG_POWER_MISCELLANEOUS,
.enable_bit = MC13783_REGCTRL_GPO3_EN,
},
[MC13783_REGU_GPO4] = {
.desc = {
.name = "REGU_GPO4",
.ops = &mc13783_regulator_ops,
.type = REGULATOR_VOLTAGE,
.id = MC13783_REGU_GPO4,
.owner = THIS_MODULE,
},
.reg = MC13783_REG_POWER_MISCELLANEOUS,
.enable_bit = MC13783_REGCTRL_GPO4_EN,
},
};
struct mc13783_priv {
struct regulator_desc desc[ARRAY_SIZE(mc13783_regulators)];
struct mc13783 *mc13783;
struct regulator_dev *regulators[0];
};
static int mc13783_enable(struct regulator_dev *rdev)
{
struct mc13783_priv *priv = rdev_get_drvdata(rdev);
int id = rdev_get_id(rdev);
dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);
return mc13783_set_bits(priv->mc13783, mc13783_regulators[id].reg,
mc13783_regulators[id].enable_bit,
mc13783_regulators[id].enable_bit);
}
static int mc13783_disable(struct regulator_dev *rdev)
{
struct mc13783_priv *priv = rdev_get_drvdata(rdev);
int id = rdev_get_id(rdev);
dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);
return mc13783_set_bits(priv->mc13783, mc13783_regulators[id].reg,
mc13783_regulators[id].enable_bit, 0);
}
static int mc13783_is_enabled(struct regulator_dev *rdev)
{
struct mc13783_priv *priv = rdev_get_drvdata(rdev);
int ret, id = rdev_get_id(rdev);
unsigned int val;
ret = mc13783_reg_read(priv->mc13783, mc13783_regulators[id].reg, &val);
if (ret)
return ret;
return (val & mc13783_regulators[id].enable_bit) != 0;
}
static struct regulator_ops mc13783_regulator_ops = {
.enable = mc13783_enable,
.disable = mc13783_disable,
.is_enabled = mc13783_is_enabled,
};
static int __devinit mc13783_regulator_probe(struct platform_device *pdev)
{
struct mc13783_priv *priv;
struct mc13783 *mc13783 = dev_get_drvdata(pdev->dev.parent);
struct mc13783_regulator_init_data *init_data;
int i, ret;
dev_dbg(&pdev->dev, "mc13783_regulator_probe id %d\n", pdev->id);
priv = kzalloc(sizeof(*priv) + mc13783->num_regulators * sizeof(void *),
GFP_KERNEL);
if (!priv)
return -ENOMEM;
priv->mc13783 = mc13783;
for (i = 0; i < mc13783->num_regulators; i++) {
init_data = &mc13783->regulators[i];
priv->regulators[i] = regulator_register(
&mc13783_regulators[init_data->id].desc,
&pdev->dev, init_data->init_data, priv);
if (IS_ERR(priv->regulators[i])) {
dev_err(&pdev->dev, "failed to register regulator %s\n",
mc13783_regulators[i].desc.name);
ret = PTR_ERR(priv->regulators[i]);
goto err;
}
}
platform_set_drvdata(pdev, priv);
return 0;
err:
while (--i >= 0)
regulator_unregister(priv->regulators[i]);
kfree(priv);
return ret;
}
static int __devexit mc13783_regulator_remove(struct platform_device *pdev)
{
struct mc13783_priv *priv = platform_get_drvdata(pdev);
struct mc13783 *mc13783 = priv->mc13783;
int i;
for (i = 0; i < mc13783->num_regulators; i++)
regulator_unregister(priv->regulators[i]);
return 0;
}
static struct platform_driver mc13783_regulator_driver = {
.driver = {
.name = "mc13783-regulator",
.owner = THIS_MODULE,
},
.remove = __devexit_p(mc13783_regulator_remove),
};
static int __init mc13783_regulator_init(void)
{
return platform_driver_probe(&mc13783_regulator_driver,
mc13783_regulator_probe);
}
subsys_initcall(mc13783_regulator_init);
static void __exit mc13783_regulator_exit(void)
{
platform_driver_unregister(&mc13783_regulator_driver);
}
module_exit(mc13783_regulator_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de");
MODULE_DESCRIPTION("Regulator Driver for Freescale MC13783 PMIC");
MODULE_ALIAS("platform:mc13783-regulator");
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