threeeye
bc1d038eac
Squashed backup commit (no shallow-clone history issues) of xiaomi-mt6833-dev/kernel_xiaomi_mt6833 (lineage-23.2 branch, upstream commit 9eece662e) plus all fixes applied to get everpal_defconfig building clean against a modern (GCC 15.2.0) toolchain -- see the previous commit message on the lineage-23.2 branch (also in this repo history is not available here since this is a squashed snapshot; full incremental history lives in the local DL380 checkout and the upstream GitHub remote). Upstream: https://github.com/xiaomi-mt6833-dev/kernel_xiaomi_mt6833 (lineage-23.2)
142 lines
3.0 KiB
C
142 lines
3.0 KiB
C
/*
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* Copyright (C) 2015 MediaTek Inc.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/types.h>
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#include <linux/mutex.h>
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#include <linux/seq_file.h>
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#include <linux/proc_fs.h>
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#include <linux/uaccess.h>
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#include <mt-plat/mtk_otp.h>
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#include "otp_pmic_config.h"
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static DEFINE_MUTEX(g_is_otp_blowing);
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/**************************************************************************
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*EXTERN FUNCTION
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**************************************************************************/
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static u32 otp_blow_start(void)
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{
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u32 ret_err = 0;
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u32 ret_vcorefs = 0;
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if (!mutex_trylock(&g_is_otp_blowing))
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return ERR_MUTEX_LOCKED_NEED_RETRY;
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/* Set High-VCORE */
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ret_vcorefs = otp_pmic_high_vcore_set();
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if (ret_vcorefs) {
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ret_err = ret_vcorefs;
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goto _fail;
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}
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/* Enable VEFUSE(fsource) */
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if (otp_pmic_fsource_set()) {
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ret_err = ERR_PMIC_CONFIG_FSOURCE;
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goto _fail;
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}
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return STATUS_DONE;
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_fail:
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if (otp_pmic_is_fsource_enabled())
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otp_pmic_fsource_release();
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/* Only release the High-VCORE DVFS without
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* even setting will not cause side-effect
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*/
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otp_pmic_high_vcore_release();
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/* Do not lock the mutex if any error */
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mutex_unlock(&g_is_otp_blowing);
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pr_notice("[OTP] blow start failed : %d\n", ret_err);
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return ret_err;
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}
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static u32 otp_is_blow_locked(void)
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{
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u32 is_locked = 0;
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is_locked = mutex_is_locked(&g_is_otp_blowing);
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if (is_locked)
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return ERR_MUTEX_LOCKED_NEED_RETRY;
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return STATUS_DONE;
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}
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static u32 otp_blow_end(void)
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{
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if (!otp_is_blow_locked())
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return ERR_SHOULD_CALL_BLOW_START_FIRST;
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/* Close VEFUSE(fsource) */
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if (otp_pmic_fsource_release()) {
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pr_notice("[OTP] release fsource error\n");
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return ERR_PMIC_CONFIG_FSOURCE;
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}
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/* Release High-VCORE */
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if (otp_pmic_high_vcore_release()) {
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pr_notice("[OTP] release VCORE error\n");
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return ERR_PMIC_RELEASE_VCORE_DVFS_HPM;
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}
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mutex_unlock(&g_is_otp_blowing);
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return STATUS_DONE;
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}
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u32 otp_ccci_handler(u32 ccci_cmd)
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{
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u32 ret = 0;
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switch (ccci_cmd) {
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case CCCI_CMD_EFUSE_BLOW_START:
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ret = otp_blow_start();
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break;
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case CCCI_CMD_EFUSE_BLOW_END:
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ret = otp_blow_end();
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break;
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case CCCI_CMD_EFUSE_IS_BLOW_LOCKED:
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ret = otp_is_blow_locked();
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break;
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default:
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ret = ERR_UNSUPPORTED_CCCI_CMD;
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break;
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}
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return ret;
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}
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EXPORT_SYMBOL(otp_ccci_handler);
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/**************************************************************************
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*STATIC FUNCTION : module init
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**************************************************************************/
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static int __init otp_init(void)
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{
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otp_pmic_high_vcore_init();
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pr_info("[OTP] init done\n");
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return 0;
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}
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module_init(otp_init);
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MODULE_LICENSE("GPL");
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