This patch adds a common platform driver to register ASV members for exynos SoCs. Signed-off-by: Yadwinder Singh Brar <yadi.brar@xxxxxxxxxxx> --- drivers/power/asv/Kconfig | 13 +++++++ drivers/power/asv/Makefile | 1 + drivers/power/asv/exynos-asv.c | 72 ++++++++++++++++++++++++++++++++++++++++ drivers/power/asv/exynos-asv.h | 21 +++++++++++ 4 files changed, 107 insertions(+), 0 deletions(-) create mode 100644 drivers/power/asv/exynos-asv.c create mode 100644 drivers/power/asv/exynos-asv.h diff --git a/drivers/power/asv/Kconfig b/drivers/power/asv/Kconfig index 7cd84bd..6104b09 100644 --- a/drivers/power/asv/Kconfig +++ b/drivers/power/asv/Kconfig @@ -9,3 +9,16 @@ menuconfig POWER_ASV manufacturing process. Say Y here to enable Adaptive Supply voltage support. + +if POWER_ASV + +config POWER_EXYNOS_ASV + bool "Adaptive Supply Voltage for Exynos" + help + Exynos supports ASV depending upon the ASV group fused on chip. + Users can request ASV specific to a frequency for a particular member + from corresponding DVFS driver. + + Say Y here to enable Exynos Adaptive Voltage Scaling. + +endif diff --git a/drivers/power/asv/Makefile b/drivers/power/asv/Makefile index 62921da..9a94868 100644 --- a/drivers/power/asv/Makefile +++ b/drivers/power/asv/Makefile @@ -1 +1,2 @@ obj-$(CONFIG_POWER_ASV) += asv.o +obj-$(CONFIG_POWER_EXYNOS_ASV) += exynos-asv.o diff --git a/drivers/power/asv/exynos-asv.c b/drivers/power/asv/exynos-asv.c new file mode 100644 index 0000000..d3f43a4 --- /dev/null +++ b/drivers/power/asv/exynos-asv.c @@ -0,0 +1,72 @@ +/* Common Exynos ASV(Adaptive Supply Voltage) driver + * + * Copyright (c) 2013 Samsung Electronics Co., Ltd. + * http://www.samsung.com/ + * + * 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/err.h> +#include <linux/io.h> +#include <linux/slab.h> +#include <linux/of_address.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/power/asv-driver.h> +#include "exynos-asv.h" + +static int exynos_asv_probe(struct platform_device *pdev) +{ + struct device_node *chip_id; + struct exynos_asv_common *exynos_asv_info; + void __iomem *base; + int ret = 0; + + exynos_asv_info = kzalloc(sizeof(struct exynos_asv_common), GFP_KERNEL); + if (!exynos_asv_info) + return -ENOMEM; + + chip_id = of_find_compatible_node(NULL, NULL, + "samsung,exynos4210-chipid"); + if (!chip_id) { + pr_err("%s: unable to find chipid\n", __func__); + ret = -ENODEV; + goto err_node; + } + + base = of_iomap(chip_id, 0); + if (!base) { + pr_err("%s: unable to map chip_id register\n", __func__); + ret = -ENOMEM; + goto err_map; + } + + exynos_asv_info->base = base; + + /* call SoC specific intialisation routine */ + + register_asv_member(exynos_asv_info->asv_list, exynos_asv_info->nr_mem); + + iounmap(base); +err_map: + of_node_put(chip_id); +err_node: + kfree(exynos_asv_info); + + return ret; +} + +static struct platform_driver exynos_asv_platdrv = { + .driver = { + .name = "exynos-asv", + .owner = THIS_MODULE, + }, + .probe = exynos_asv_probe, +}; +module_platform_driver(exynos_asv_platdrv); + +MODULE_AUTHOR("Yadwinder Singh Brar<yadi.brar@xxxxxxxxxxx>"); +MODULE_DESCRIPTION("Common Exynos ASV driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/power/asv/exynos-asv.h b/drivers/power/asv/exynos-asv.h new file mode 100644 index 0000000..89a1ae8 --- /dev/null +++ b/drivers/power/asv/exynos-asv.h @@ -0,0 +1,21 @@ +/* + * Exynos - Adaptive Supply Voltage Driver Header File + * + * copyright (c) 2013 samsung electronics co., ltd. + * http://www.samsung.com/ + * + * 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 __EXYNOS_ASV_D_H +#define __EXYNOS_ASV_D_H __FILE__ + +struct exynos_asv_common { + struct asv_info *asv_list; + unsigned int nr_mem; + void __iomem *base; +}; + +#endif /* __EXYNOS_ASV_D_H */ -- 1.7.0.4 -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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