[PATCHv4,2/4] regulator: omap smps regulator driver

Message ID	1311853739-18984-3-git-send-email-t-kristo@ti.com (mailing list archive)
State	New, archived
Headers	show Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter2.kernel.org (8.14.4/8.14.4) with ESMTP id p6SBnNhx029118 for <patchwork-omap@patchwork.kernel.org>; Thu, 28 Jul 2011 11:49:23 GMT thread-index: AcxNHF9aPrmg7ghLTaSEzoL4X6p+Hg== Content-Transfer-Encoding: 8BIT Content-Class: urn:content-classes:message Importance: normal From: Tero Kristo <t-kristo@ti.com> To: <linux-omap@vger.kernel.org> CC: Kevin Hilman <khilman@ti.com>, Tony Lindgren <tony@atomide.com>, Todd Poynor <toddpoynor@google.com>, Mark Brown <broonie@opensource.wolfsonmicro.com>, Liam Girdwood <lrg@ti.com>, Graeme Gregory <gg@slimlogic.co.uk> Subject: [PATCHv4 2/4] regulator: omap smps regulator driver Date: Thu, 28 Jul 2011 14:48:57 +0300 Message-ID: <1311853739-18984-3-git-send-email-t-kristo@ti.com> In-Reply-To: <1311853739-18984-1-git-send-email-t-kristo@ti.com> References: <1311853739-18984-1-git-send-email-t-kristo@ti.com> MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Sender: linux-omap-owner@vger.kernel.org Precedence: bulk

diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig index d7ed20f..2ba8ed2 100644 --- a/drivers/regulator/Kconfig +++ b/drivers/regulator/Kconfig @@ -303,5 +303,13 @@ config REGULATOR_TPS65910 help This driver supports TPS65910 voltage regulator chips. +config REGULATOR_OMAP_SMPS + tristate "TI OMAP SMPS Power Regulators" + depends on (ARCH_OMAP3 || ARCH_OMAP4) && PM + help + This driver supports the OMAP3 / OMAP4 SMPS regulators for VDD1, + VDD2 and VDD3. These regulators are accessed using the voltage + processor interface of OMAP. + endif diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile index 3932d2e..191e3d5 100644 --- a/drivers/regulator/Makefile +++ b/drivers/regulator/Makefile @@ -43,5 +43,6 @@ obj-$(CONFIG_REGULATOR_ISL6271A) += isl6271a-regulator.o obj-$(CONFIG_REGULATOR_AB8500) += ab8500.o obj-$(CONFIG_REGULATOR_DB8500_PRCMU) += db8500-prcmu.o obj-$(CONFIG_REGULATOR_TPS65910) += tps65910-regulator.o +obj-$(CONFIG_REGULATOR_OMAP_SMPS) += omap-smps-regulator.o ccflags-$(CONFIG_REGULATOR_DEBUG) += -DDEBUG diff --git a/drivers/regulator/omap-smps-regulator.c b/drivers/regulator/omap-smps-regulator.c new file mode 100644 index 0000000..e4a0262 --- /dev/null +++ b/drivers/regulator/omap-smps-regulator.c @@ -0,0 +1,181 @@ +/* + * OMAP SMPS regulator driver + * + * Copyright (C) 2011 Texas Instruments, Inc. + * + * Author: Tero Kristo <t-kristo@ti.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + */ + +#include <linux/kernel.h> +#include <linux/ctype.h> +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/init.h> +#include <linux/err.h> +#include <linux/delay.h> +#include <linux/platform_device.h> +#include <linux/regulator/driver.h> +#include <linux/regulator/machine.h> +#include <linux/regulator/omap-smps.h> +#include <plat/voltage.h> + +#define DRIVER_NAME "omap-smps" + +struct omap_smps_reg_info { + const char *vdd_name; + struct regulator_dev *rdev; + struct voltagedomain *voltdm; + struct regulator_desc desc; +}; + +static int omap_smps_set_voltage(struct regulator_dev *rdev, int min_uV, + int max_uV, unsigned *selector) +{ + struct omap_smps_reg_info *info = rdev_get_drvdata(rdev); + return voltdm_scale(info->voltdm, min_uV); +} + +static int omap_smps_get_voltage(struct regulator_dev *rdev) +{ + struct omap_smps_reg_info *info = rdev_get_drvdata(rdev); + return voltdm_get_voltage(info->voltdm); +} + +static struct regulator_ops omap_smps_ops = { + .set_voltage = omap_smps_set_voltage, + .get_voltage = omap_smps_get_voltage, +}; + +#define SMPS_REG(name) { \ + .vdd_name = #name, \ + .desc = { \ + .ops = &omap_smps_ops, \ + .type = REGULATOR_VOLTAGE, \ + .owner = THIS_MODULE, \ + }, \ + } + +static struct omap_smps_reg_info omap_smps_regs[] = { + SMPS_REG(mpu), + SMPS_REG(mpu_iva), + SMPS_REG(iva), + SMPS_REG(core), +}; + +static void omap_smps_reg_cleanup(void) +{ + int i; + struct omap_smps_reg_info *info; + + for (i = 0; i < ARRAY_SIZE(omap_smps_regs); i++) { + info = &omap_smps_regs[i]; + if (info->rdev) { + regulator_unregister(info->rdev); + info->rdev = NULL; + } + + kfree(info->desc.name); + info->desc.name = NULL; + } +} + +static struct regulator_init_data dummy_initdata __initdata; + +static int __devinit omap_smps_reg_probe(struct platform_device *pdev) +{ + int i, j, ret; + struct omap_smps_reg_info *info; + struct omap_smps_platform_data *pdata; + struct regulator_dev *rdev; + struct regulator_init_data *initdata; + struct voltagedomain *voltdm; + char *name; + + pdata = pdev->dev.platform_data; + + for (i = 0; i < ARRAY_SIZE(omap_smps_regs); i++) { + initdata = &dummy_initdata; + info = &omap_smps_regs[i]; + + for (j = 0; j < pdata->num_regulators; j++) + if (!strcmp(info->vdd_name, + pdata->regulators[j]->consumer_supplies[0]. + dev_name)) { + initdata = pdata->regulators[j]; + break; + } + + voltdm = voltdm_lookup(info->vdd_name); + + if (!voltdm) + continue; + + info->voltdm = voltdm; + + name = kmalloc(strlen(info->vdd_name) + 5, GFP_KERNEL); + + if (!name) { + ret = -ENOMEM; + goto err; + } + + sprintf(name, "VDD_%s", info->vdd_name); + + for (j = 0; j < strlen(name); j++) + name[j] = toupper(name[j]); + + info->desc.name = name; + + rdev = regulator_register(&info->desc, &pdev->dev, initdata, + info); + + if (IS_ERR(rdev)) { + dev_err(&pdev->dev, "can't register %s, %ld\n", + info->desc.name, PTR_ERR(rdev)); + ret = PTR_ERR(rdev); + goto err; + } + + info->rdev = rdev; + } + + return 0; +err: + omap_smps_reg_cleanup(); + return ret; +} + +static int omap_smps_reg_remove(struct platform_device *pdev) +{ + omap_smps_reg_cleanup(); + return 0; +} + +static struct platform_driver omap_smps_reg_driver = { + .probe = omap_smps_reg_probe, + .remove = __devexit_p(omap_smps_reg_remove), + .driver.name = DRIVER_NAME, + .driver.owner = THIS_MODULE, +}; + +static int __init omap_smps_reg_init(void) +{ + return platform_driver_register(&omap_smps_reg_driver); +} +subsys_initcall(omap_smps_reg_init); + +static void __exit omap_smps_reg_exit(void) +{ + platform_driver_unregister(&omap_smps_reg_driver); +} +module_exit(omap_smps_reg_exit); + +MODULE_ALIAS("platform:"DRIVER_NAME); +MODULE_AUTHOR("Tero Kristo <t-kristo@ti.com>"); +MODULE_DESCRIPTION("OMAP SMPS regulator driver"); +MODULE_LICENSE("GPL"); diff --git a/include/linux/regulator/omap-smps.h b/include/linux/regulator/omap-smps.h new file mode 100644 index 0000000..1d5f940 --- /dev/null +++ b/include/linux/regulator/omap-smps.h @@ -0,0 +1,20 @@ +/* + * omap-smps.h - header for OMAP SMPS regulator support + * + * Copyright (C) 2011 Texas Instruments, Inc. + * + * + * 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. + */ + +#ifndef __OMAP_SMPS_H__ +#define __OMAP_SMPS_H__ + +struct omap_smps_platform_data { + struct regulator_init_data **regulators; + int num_regulators; +}; + +#endif /* End of __OMAP_SMPS_H__ */

[PATCHv4,2/4] regulator: omap smps regulator driver

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