rjw | 1f88458 | 2022-01-06 17:20:42 +0800 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (C) 2015 MediaTek Inc. |
| 3 | * |
| 4 | * This program is free software: you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU General Public License version 2 as |
| 6 | * published by the Free Software Foundation. |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, |
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 11 | * GNU General Public License for more details. |
| 12 | */ |
| 13 | |
| 14 | /****************************************************************************** |
| 15 | * pmic_wrapper.c - Linux pmic_wrapper Driver |
| 16 | * |
| 17 | * |
| 18 | * DESCRIPTION: |
| 19 | * This file provid the other drivers PMIC wrapper relative functions |
| 20 | * |
| 21 | ******************************************************************************/ |
| 22 | |
| 23 | #include <linux/kernel.h> |
| 24 | #include <linux/platform_device.h> |
| 25 | #include <linux/types.h> |
| 26 | #include <linux/device.h> |
| 27 | #include <linux/fs.h> |
| 28 | #include <linux/module.h> |
| 29 | /*#include <mach/mt_typedefs.h>*/ |
| 30 | #include <linux/timer.h> |
| 31 | //#include <mtk_pmic_wrap.h> |
| 32 | #include <linux/syscore_ops.h> |
| 33 | #include <linux/regmap.h> |
| 34 | #include <linux/soc/mediatek/pmic_wrap.h> |
| 35 | #include <linux/of_address.h> |
| 36 | #include <linux/of_fdt.h> |
| 37 | #include <linux/of.h> |
| 38 | #include <linux/of_irq.h> |
| 39 | #include <linux/of_address.h> |
| 40 | #include <linux/spinlock.h> |
| 41 | |
| 42 | static struct regmap *pmic_regmap; |
| 43 | static spinlock_t wrp_lock = __SPIN_LOCK_UNLOCKED(lock); |
| 44 | |
| 45 | s32 pwrap_read(u32 adr, u32 *rdata) |
| 46 | { |
| 47 | int ret = 0; |
| 48 | unsigned long flags = 0; |
| 49 | |
| 50 | if (pmic_regmap) { |
| 51 | spin_lock_irqsave(&wrp_lock, flags); |
| 52 | ret = regmap_read(pmic_regmap, adr, rdata); |
| 53 | spin_unlock_irqrestore(&wrp_lock, flags); |
| 54 | } else |
| 55 | pr_notice("%s %d rec.\n", __func__, __LINE__); |
| 56 | return ret; |
| 57 | } |
| 58 | EXPORT_SYMBOL(pwrap_read); |
| 59 | |
| 60 | s32 pwrap_write(u32 adr, u32 wdata) |
| 61 | { |
| 62 | int ret = 0; |
| 63 | unsigned long flags = 0; |
| 64 | |
| 65 | if (pmic_regmap) { |
| 66 | spin_lock_irqsave(&wrp_lock, flags); |
| 67 | ret = regmap_write(pmic_regmap, adr, wdata); |
| 68 | spin_unlock_irqrestore(&wrp_lock, flags); |
| 69 | } else |
| 70 | pr_notice("%s %d Error.\n", __func__, __LINE__); |
| 71 | return ret; |
| 72 | } |
| 73 | EXPORT_SYMBOL(pwrap_write); |
| 74 | |
| 75 | static int __init mt_pwrap_init(void) |
| 76 | { |
| 77 | struct device_node *node, *pwrap_node; |
| 78 | |
| 79 | pr_info("%s\n", __func__); |
| 80 | node = of_find_compatible_node(NULL, NULL, "mediatek,pwraph"); |
| 81 | pwrap_node = of_parse_phandle(node, "mediatek,pwrap-regmap", 0); |
| 82 | if (pwrap_node) { |
| 83 | pmic_regmap = pwrap_node_to_regmap(pwrap_node); |
| 84 | if (IS_ERR(pmic_regmap)) { |
| 85 | pr_notice("%s %d Error.\n", __func__, __LINE__); |
| 86 | return PTR_ERR(pmic_regmap); |
| 87 | } |
| 88 | } else { |
| 89 | pr_notice("%s %d Error.\n", __func__, __LINE__); |
| 90 | return -EINVAL; |
| 91 | } |
| 92 | return 0; |
| 93 | } |
| 94 | subsys_initcall(mt_pwrap_init); |
| 95 | |
| 96 | MODULE_AUTHOR("mediatek"); |
| 97 | MODULE_DESCRIPTION("pmic_wrapper Driver Revision"); |
| 98 | MODULE_LICENSE("GPL"); |