/* * 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.h> #include <linux/regulator/machine.h> #include <linux/regulator/driver.h> #include <linux/platform_device.h> #include <linux/kernel.h> #include <linux/init.h> #include <linux/err.h> #define MC13783_REG_SWITCHERS4 28 #define MC13783_REG_SWITCHERS4_PLLEN (1 << 18) #define MC13783_REG_SWITCHERS5 29 #define MC13783_REG_SWITCHERS5_SW3EN (1 << 20) #define MC13783_REG_REGULATORMODE0 32 #define MC13783_REG_REGULATORMODE0_VAUDIOEN (1 << 0) #define MC13783_REG_REGULATORMODE0_VIOHIEN (1 << 3) #define MC13783_REG_REGULATORMODE0_VIOLOEN (1 << 6) #define MC13783_REG_REGULATORMODE0_VDIGEN (1 << 9) #define MC13783_REG_REGULATORMODE0_VGENEN (1 << 12) #define MC13783_REG_REGULATORMODE0_VRFDIGEN (1 << 15) #define MC13783_REG_REGULATORMODE0_VRFREFEN (1 << 18) #define MC13783_REG_REGULATORMODE0_VRFCPEN (1 << 21) #define MC13783_REG_REGULATORMODE1 33 #define MC13783_REG_REGULATORMODE1_VSIMEN (1 << 0) #define MC13783_REG_REGULATORMODE1_VESIMEN (1 << 3) #define MC13783_REG_REGULATORMODE1_VCAMEN (1 << 6) #define MC13783_REG_REGULATORMODE1_VRFBGEN (1 << 9) #define MC13783_REG_REGULATORMODE1_VVIBEN (1 << 11) #define MC13783_REG_REGULATORMODE1_VRF1EN (1 << 12) #define MC13783_REG_REGULATORMODE1_VRF2EN (1 << 15) #define MC13783_REG_REGULATORMODE1_VMMC1EN (1 << 18) #define MC13783_REG_REGULATORMODE1_VMMC2EN (1 << 21) #define MC13783_REG_POWERMISC 34 #define MC13783_REG_POWERMISC_GPO1EN (1 << 6) #define MC13783_REG_POWERMISC_GPO2EN (1 << 8) #define MC13783_REG_POWERMISC_GPO3EN (1 << 10) #define MC13783_REG_POWERMISC_GPO4EN (1 << 12) struct mc13783_regulator { struct regulator_desc desc; int reg; int enable_bit; }; static struct regulator_ops mc13783_regulator_ops; #define MC13783_DEFINE(prefix, _name, _reg) \ [MC13783_ ## prefix ## _ ## _name] = { \ .desc = { \ .name = #prefix "_" #_name, \ .ops = &mc13783_regulator_ops, \ .type = REGULATOR_VOLTAGE, \ .id = MC13783_ ## prefix ## _ ## _name, \ .owner = THIS_MODULE, \ }, \ .reg = MC13783_REG_ ## _reg, \ .enable_bit = MC13783_REG_ ## _reg ## _ ## _name ## EN, \ } #define MC13783_DEFINE_SW(_name, _reg) MC13783_DEFINE(SW, _name, _reg) #define MC13783_DEFINE_REGU(_name, _reg) MC13783_DEFINE(REGU, _name, _reg) static struct mc13783_regulator mc13783_regulators[] = { MC13783_DEFINE_SW(SW3, SWITCHERS5), MC13783_DEFINE_SW(PLL, SWITCHERS4), MC13783_DEFINE_REGU(VAUDIO, REGULATORMODE0), MC13783_DEFINE_REGU(VIOHI, REGULATORMODE0), MC13783_DEFINE_REGU(VIOLO, REGULATORMODE0), MC13783_DEFINE_REGU(VDIG, REGULATORMODE0), MC13783_DEFINE_REGU(VGEN, REGULATORMODE0), MC13783_DEFINE_REGU(VRFDIG, REGULATORMODE0), MC13783_DEFINE_REGU(VRFREF, REGULATORMODE0), MC13783_DEFINE_REGU(VRFCP, REGULATORMODE0), MC13783_DEFINE_REGU(VSIM, REGULATORMODE1), MC13783_DEFINE_REGU(VESIM, REGULATORMODE1), MC13783_DEFINE_REGU(VCAM, REGULATORMODE1), MC13783_DEFINE_REGU(VRFBG, REGULATORMODE1), MC13783_DEFINE_REGU(VVIB, REGULATORMODE1), MC13783_DEFINE_REGU(VRF1, REGULATORMODE1), MC13783_DEFINE_REGU(VRF2, REGULATORMODE1), MC13783_DEFINE_REGU(VMMC1, REGULATORMODE1), MC13783_DEFINE_REGU(VMMC2, REGULATORMODE1), MC13783_DEFINE_REGU(GPO1, POWERMISC), MC13783_DEFINE_REGU(GPO2, POWERMISC), MC13783_DEFINE_REGU(GPO3, POWERMISC), MC13783_DEFINE_REGU(GPO4, POWERMISC), }; struct mc13783_regulator_priv { struct mc13783 *mc13783; struct regulator_dev *regulators[]; }; static int mc13783_regulator_enable(struct regulator_dev *rdev) { struct mc13783_regulator_priv *priv = rdev_get_drvdata(rdev); int id = rdev_get_id(rdev); int ret; dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id); mc13783_lock(priv->mc13783); ret = mc13783_reg_rmw(priv->mc13783, mc13783_regulators[id].reg, mc13783_regulators[id].enable_bit, mc13783_regulators[id].enable_bit); mc13783_unlock(priv->mc13783); return ret; } static int mc13783_regulator_disable(struct regulator_dev *rdev) { struct mc13783_regulator_priv *priv = rdev_get_drvdata(rdev); int id = rdev_get_id(rdev); int ret; dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id); mc13783_lock(priv->mc13783); ret = mc13783_reg_rmw(priv->mc13783, mc13783_regulators[id].reg, mc13783_regulators[id].enable_bit, 0); mc13783_unlock(priv->mc13783); return ret; } static int mc13783_regulator_is_enabled(struct regulator_dev *rdev) { struct mc13783_regulator_priv *priv = rdev_get_drvdata(rdev); int ret, id = rdev_get_id(rdev); unsigned int val; mc13783_lock(priv->mc13783); ret = mc13783_reg_read(priv->mc13783, mc13783_regulators[id].reg, &val); mc13783_unlock(priv->mc13783); if (ret) return ret; return (val & mc13783_regulators[id].enable_bit) != 0; } static struct regulator_ops mc13783_regulator_ops = { .enable = mc13783_regulator_enable, .disable = mc13783_regulator_disable, .is_enabled = mc13783_regulator_is_enabled, }; static int __devinit mc13783_regulator_probe(struct platform_device *pdev) { struct mc13783_regulator_priv *priv; struct mc13783 *mc13783 = dev_get_drvdata(pdev->dev.parent); struct mc13783_regulator_platform_data *pdata = dev_get_platdata(&pdev->dev); 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) + pdata->num_regulators * sizeof(priv->regulators[0]), GFP_KERNEL); if (!priv) return -ENOMEM; priv->mc13783 = mc13783; for (i = 0; i < pdata->num_regulators; i++) { init_data = &pdata->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_regulator_priv *priv = platform_get_drvdata(pdev); struct mc13783_regulator_platform_data *pdata = dev_get_platdata(&pdev->dev); int i; for (i = 0; i < pdata->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), .probe = mc13783_regulator_probe, }; static int __init mc13783_regulator_init(void) { return platform_driver_register(&mc13783_regulator_driver); } 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 v2"); MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de"); MODULE_DESCRIPTION("Regulator Driver for Freescale MC13783 PMIC"); MODULE_ALIAS("platform:mc13783-regulator");