246 строки
7.2 KiB
C
246 строки
7.2 KiB
C
/*
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* Regulator Driver for Freescale MC13783 PMIC
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*
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* Copyright (C) 2008 Sascha Hauer, Pengutronix <s.hauer@pengutronix.de>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/mfd/mc13783.h>
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#include <linux/regulator/machine.h>
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#include <linux/regulator/driver.h>
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#include <linux/platform_device.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/err.h>
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#define MC13783_REG_SWITCHERS4 28
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#define MC13783_REG_SWITCHERS4_PLLEN (1 << 18)
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#define MC13783_REG_SWITCHERS5 29
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#define MC13783_REG_SWITCHERS5_SW3EN (1 << 20)
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#define MC13783_REG_REGULATORMODE0 32
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#define MC13783_REG_REGULATORMODE0_VAUDIOEN (1 << 0)
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#define MC13783_REG_REGULATORMODE0_VIOHIEN (1 << 3)
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#define MC13783_REG_REGULATORMODE0_VIOLOEN (1 << 6)
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#define MC13783_REG_REGULATORMODE0_VDIGEN (1 << 9)
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#define MC13783_REG_REGULATORMODE0_VGENEN (1 << 12)
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#define MC13783_REG_REGULATORMODE0_VRFDIGEN (1 << 15)
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#define MC13783_REG_REGULATORMODE0_VRFREFEN (1 << 18)
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#define MC13783_REG_REGULATORMODE0_VRFCPEN (1 << 21)
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#define MC13783_REG_REGULATORMODE1 33
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#define MC13783_REG_REGULATORMODE1_VSIMEN (1 << 0)
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#define MC13783_REG_REGULATORMODE1_VESIMEN (1 << 3)
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#define MC13783_REG_REGULATORMODE1_VCAMEN (1 << 6)
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#define MC13783_REG_REGULATORMODE1_VRFBGEN (1 << 9)
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#define MC13783_REG_REGULATORMODE1_VVIBEN (1 << 11)
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#define MC13783_REG_REGULATORMODE1_VRF1EN (1 << 12)
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#define MC13783_REG_REGULATORMODE1_VRF2EN (1 << 15)
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#define MC13783_REG_REGULATORMODE1_VMMC1EN (1 << 18)
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#define MC13783_REG_REGULATORMODE1_VMMC2EN (1 << 21)
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#define MC13783_REG_POWERMISC 34
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#define MC13783_REG_POWERMISC_GPO1EN (1 << 6)
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#define MC13783_REG_POWERMISC_GPO2EN (1 << 8)
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#define MC13783_REG_POWERMISC_GPO3EN (1 << 10)
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#define MC13783_REG_POWERMISC_GPO4EN (1 << 12)
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struct mc13783_regulator {
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struct regulator_desc desc;
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int reg;
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int enable_bit;
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};
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static struct regulator_ops mc13783_regulator_ops;
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#define MC13783_DEFINE(prefix, _name, _reg) \
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[MC13783_ ## prefix ## _ ## _name] = { \
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.desc = { \
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.name = #prefix "_" #_name, \
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.ops = &mc13783_regulator_ops, \
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.type = REGULATOR_VOLTAGE, \
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.id = MC13783_ ## prefix ## _ ## _name, \
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.owner = THIS_MODULE, \
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}, \
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.reg = MC13783_REG_ ## _reg, \
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.enable_bit = MC13783_REG_ ## _reg ## _ ## _name ## EN, \
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}
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#define MC13783_DEFINE_SW(_name, _reg) MC13783_DEFINE(SW, _name, _reg)
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#define MC13783_DEFINE_REGU(_name, _reg) MC13783_DEFINE(REGU, _name, _reg)
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static struct mc13783_regulator mc13783_regulators[] = {
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MC13783_DEFINE_SW(SW3, SWITCHERS5),
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MC13783_DEFINE_SW(PLL, SWITCHERS4),
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MC13783_DEFINE_REGU(VAUDIO, REGULATORMODE0),
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MC13783_DEFINE_REGU(VIOHI, REGULATORMODE0),
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MC13783_DEFINE_REGU(VIOLO, REGULATORMODE0),
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MC13783_DEFINE_REGU(VDIG, REGULATORMODE0),
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MC13783_DEFINE_REGU(VGEN, REGULATORMODE0),
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MC13783_DEFINE_REGU(VRFDIG, REGULATORMODE0),
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MC13783_DEFINE_REGU(VRFREF, REGULATORMODE0),
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MC13783_DEFINE_REGU(VRFCP, REGULATORMODE0),
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MC13783_DEFINE_REGU(VSIM, REGULATORMODE1),
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MC13783_DEFINE_REGU(VESIM, REGULATORMODE1),
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MC13783_DEFINE_REGU(VCAM, REGULATORMODE1),
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MC13783_DEFINE_REGU(VRFBG, REGULATORMODE1),
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MC13783_DEFINE_REGU(VVIB, REGULATORMODE1),
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MC13783_DEFINE_REGU(VRF1, REGULATORMODE1),
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MC13783_DEFINE_REGU(VRF2, REGULATORMODE1),
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MC13783_DEFINE_REGU(VMMC1, REGULATORMODE1),
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MC13783_DEFINE_REGU(VMMC2, REGULATORMODE1),
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MC13783_DEFINE_REGU(GPO1, POWERMISC),
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MC13783_DEFINE_REGU(GPO2, POWERMISC),
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MC13783_DEFINE_REGU(GPO3, POWERMISC),
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MC13783_DEFINE_REGU(GPO4, POWERMISC),
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};
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struct mc13783_regulator_priv {
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struct mc13783 *mc13783;
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struct regulator_dev *regulators[];
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};
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static int mc13783_regulator_enable(struct regulator_dev *rdev)
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{
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struct mc13783_regulator_priv *priv = rdev_get_drvdata(rdev);
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int id = rdev_get_id(rdev);
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int ret;
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dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);
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mc13783_lock(priv->mc13783);
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ret = mc13783_reg_rmw(priv->mc13783, mc13783_regulators[id].reg,
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mc13783_regulators[id].enable_bit,
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mc13783_regulators[id].enable_bit);
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mc13783_unlock(priv->mc13783);
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return ret;
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}
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static int mc13783_regulator_disable(struct regulator_dev *rdev)
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{
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struct mc13783_regulator_priv *priv = rdev_get_drvdata(rdev);
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int id = rdev_get_id(rdev);
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int ret;
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dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);
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mc13783_lock(priv->mc13783);
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ret = mc13783_reg_rmw(priv->mc13783, mc13783_regulators[id].reg,
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mc13783_regulators[id].enable_bit, 0);
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mc13783_unlock(priv->mc13783);
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return ret;
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}
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static int mc13783_regulator_is_enabled(struct regulator_dev *rdev)
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{
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struct mc13783_regulator_priv *priv = rdev_get_drvdata(rdev);
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int ret, id = rdev_get_id(rdev);
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unsigned int val;
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mc13783_lock(priv->mc13783);
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ret = mc13783_reg_read(priv->mc13783, mc13783_regulators[id].reg, &val);
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mc13783_unlock(priv->mc13783);
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if (ret)
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return ret;
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return (val & mc13783_regulators[id].enable_bit) != 0;
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}
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static struct regulator_ops mc13783_regulator_ops = {
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.enable = mc13783_regulator_enable,
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.disable = mc13783_regulator_disable,
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.is_enabled = mc13783_regulator_is_enabled,
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};
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static int __devinit mc13783_regulator_probe(struct platform_device *pdev)
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{
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struct mc13783_regulator_priv *priv;
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struct mc13783 *mc13783 = dev_get_drvdata(pdev->dev.parent);
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struct mc13783_regulator_platform_data *pdata =
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dev_get_platdata(&pdev->dev);
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struct mc13783_regulator_init_data *init_data;
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int i, ret;
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dev_dbg(&pdev->dev, "mc13783_regulator_probe id %d\n", pdev->id);
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priv = kzalloc(sizeof(*priv) +
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pdata->num_regulators * sizeof(priv->regulators[0]),
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GFP_KERNEL);
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if (!priv)
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return -ENOMEM;
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priv->mc13783 = mc13783;
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for (i = 0; i < pdata->num_regulators; i++) {
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init_data = &pdata->regulators[i];
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priv->regulators[i] = regulator_register(
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&mc13783_regulators[init_data->id].desc,
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&pdev->dev, init_data->init_data, priv);
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if (IS_ERR(priv->regulators[i])) {
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dev_err(&pdev->dev, "failed to register regulator %s\n",
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mc13783_regulators[i].desc.name);
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ret = PTR_ERR(priv->regulators[i]);
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goto err;
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}
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}
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platform_set_drvdata(pdev, priv);
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return 0;
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err:
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while (--i >= 0)
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regulator_unregister(priv->regulators[i]);
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kfree(priv);
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return ret;
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}
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static int __devexit mc13783_regulator_remove(struct platform_device *pdev)
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{
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struct mc13783_regulator_priv *priv = platform_get_drvdata(pdev);
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struct mc13783_regulator_platform_data *pdata =
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dev_get_platdata(&pdev->dev);
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int i;
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for (i = 0; i < pdata->num_regulators; i++)
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regulator_unregister(priv->regulators[i]);
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return 0;
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}
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static struct platform_driver mc13783_regulator_driver = {
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.driver = {
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.name = "mc13783-regulator",
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.owner = THIS_MODULE,
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},
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.remove = __devexit_p(mc13783_regulator_remove),
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.probe = mc13783_regulator_probe,
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};
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static int __init mc13783_regulator_init(void)
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{
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return platform_driver_register(&mc13783_regulator_driver);
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}
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subsys_initcall(mc13783_regulator_init);
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static void __exit mc13783_regulator_exit(void)
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{
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platform_driver_unregister(&mc13783_regulator_driver);
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}
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module_exit(mc13783_regulator_exit);
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MODULE_LICENSE("GPL v2");
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MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de");
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MODULE_DESCRIPTION("Regulator Driver for Freescale MC13783 PMIC");
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MODULE_ALIAS("platform:mc13783-regulator");
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