| /* |
| * Copyright (C) 2015 MediaTek 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. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| */ |
| |
| /****************************************************************************** |
| * pmic_wrapper.c - Linux pmic_wrapper Driver |
| * |
| * |
| * DESCRIPTION: |
| * This file provid the other drivers PMIC wrapper relative functions |
| * |
| ******************************************************************************/ |
| |
| #include <linux/kernel.h> |
| #include <linux/platform_device.h> |
| #include <linux/types.h> |
| #include <linux/device.h> |
| #include <linux/fs.h> |
| #include <linux/module.h> |
| /*#include <mach/mt_typedefs.h>*/ |
| #include <linux/timer.h> |
| //#include <mtk_pmic_wrap.h> |
| #include <linux/syscore_ops.h> |
| #include <linux/regmap.h> |
| #include <linux/soc/mediatek/pmic_wrap.h> |
| #include <linux/of_address.h> |
| #include <linux/of_fdt.h> |
| #include <linux/of.h> |
| #include <linux/of_irq.h> |
| #include <linux/of_address.h> |
| #include <linux/spinlock.h> |
| |
| static struct regmap *pmic_regmap; |
| static spinlock_t wrp_lock = __SPIN_LOCK_UNLOCKED(lock); |
| |
| s32 pwrap_read(u32 adr, u32 *rdata) |
| { |
| int ret = 0; |
| unsigned long flags = 0; |
| |
| if (pmic_regmap) { |
| spin_lock_irqsave(&wrp_lock, flags); |
| ret = regmap_read(pmic_regmap, adr, rdata); |
| spin_unlock_irqrestore(&wrp_lock, flags); |
| } else |
| pr_notice("%s %d rec.\n", __func__, __LINE__); |
| return ret; |
| } |
| EXPORT_SYMBOL(pwrap_read); |
| |
| s32 pwrap_write(u32 adr, u32 wdata) |
| { |
| int ret = 0; |
| unsigned long flags = 0; |
| |
| if (pmic_regmap) { |
| spin_lock_irqsave(&wrp_lock, flags); |
| ret = regmap_write(pmic_regmap, adr, wdata); |
| spin_unlock_irqrestore(&wrp_lock, flags); |
| } else |
| pr_notice("%s %d Error.\n", __func__, __LINE__); |
| return ret; |
| } |
| EXPORT_SYMBOL(pwrap_write); |
| |
| static int __init mt_pwrap_init(void) |
| { |
| struct device_node *node, *pwrap_node; |
| |
| pr_info("%s\n", __func__); |
| node = of_find_compatible_node(NULL, NULL, "mediatek,pwraph"); |
| pwrap_node = of_parse_phandle(node, "mediatek,pwrap-regmap", 0); |
| if (pwrap_node) { |
| pmic_regmap = pwrap_node_to_regmap(pwrap_node); |
| if (IS_ERR(pmic_regmap)) { |
| pr_notice("%s %d Error.\n", __func__, __LINE__); |
| return PTR_ERR(pmic_regmap); |
| } |
| } else { |
| pr_notice("%s %d Error.\n", __func__, __LINE__); |
| return -EINVAL; |
| } |
| return 0; |
| } |
| subsys_initcall(mt_pwrap_init); |
| |
| MODULE_AUTHOR("mediatek"); |
| MODULE_DESCRIPTION("pmic_wrapper Driver Revision"); |
| MODULE_LICENSE("GPL"); |