150 lines
3 KiB
C
150 lines
3 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2019 MediaTek Inc.
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*/
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#include <linux/regulator/consumer.h>
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#include <linux/string.h>
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#include <linux/kernel.h>
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#if defined(CONFIG_RT5081_PMU_DSV) || defined(CONFIG_MT6370_PMU_DSV)
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static struct regulator *disp_bias_pos;
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static struct regulator *disp_bias_neg;
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static int regulator_inited;
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int display_bias_regulator_init(void)
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{
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int ret = 0;
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if (regulator_inited)
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return ret;
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/* please only get regulator once in a driver */
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disp_bias_pos = regulator_get(NULL, "dsv_pos");
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if (IS_ERR(disp_bias_pos)) { /* handle return value */
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ret = PTR_ERR(disp_bias_pos);
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pr_info("get dsv_pos fail, error: %d\n", ret);
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return ret;
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}
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disp_bias_neg = regulator_get(NULL, "dsv_neg");
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if (IS_ERR(disp_bias_neg)) { /* handle return value */
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ret = PTR_ERR(disp_bias_neg);
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pr_info("get dsv_neg fail, error: %d\n", ret);
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return ret;
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}
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regulator_inited = 1;
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return ret; /* must be 0 */
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}
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EXPORT_SYMBOL(display_bias_regulator_init);
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int disp_late_bias_enable(void)
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{
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int ret = 0;
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int retval = 0;
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display_bias_regulator_init();
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ret = regulator_enable(disp_bias_pos);
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if (ret < 0)
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pr_info("enable regulator disp_bias_pos fail, ret = %d\n",
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ret);
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retval |= ret;
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ret = regulator_enable(disp_bias_neg);
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if (ret < 0)
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pr_info("enable regulator disp_bias_neg fail, ret = %d\n",
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ret);
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retval |= ret;
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return retval;
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}
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EXPORT_SYMBOL(disp_late_bias_enable);
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int display_bias_enable(void)
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{
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int ret = 0;
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int retval = 0;
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display_bias_regulator_init();
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/* set voltage with min & max*/
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ret = regulator_set_voltage(disp_bias_pos, 5400000, 5400000);
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if (ret < 0)
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pr_info("set voltage disp_bias_pos fail, ret = %d\n", ret);
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retval |= ret;
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ret = regulator_set_voltage(disp_bias_neg, 5400000, 5400000);
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if (ret < 0)
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pr_info("set voltage disp_bias_neg fail, ret = %d\n", ret);
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retval |= ret;
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/* enable regulator */
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ret = regulator_enable(disp_bias_pos);
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if (ret < 0)
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pr_info("enable regulator disp_bias_pos fail, ret = %d\n",
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ret);
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retval |= ret;
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ret = regulator_enable(disp_bias_neg);
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if (ret < 0)
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pr_info("enable regulator disp_bias_neg fail, ret = %d\n",
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ret);
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retval |= ret;
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return retval;
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}
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EXPORT_SYMBOL(display_bias_enable);
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int display_bias_disable(void)
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{
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int ret = 0;
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int retval = 0;
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display_bias_regulator_init();
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ret = regulator_disable(disp_bias_neg);
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if (ret < 0)
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pr_info("disable regulator disp_bias_neg fail, ret = %d\n",
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ret);
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retval |= ret;
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ret = regulator_disable(disp_bias_pos);
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if (ret < 0)
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pr_info("disable regulator disp_bias_pos fail, ret = %d\n",
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ret);
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retval |= ret;
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return retval;
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}
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EXPORT_SYMBOL(display_bias_disable);
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#else
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int display_bias_regulator_init(void)
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{
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return 0;
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}
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EXPORT_SYMBOL(display_bias_regulator_init);
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int display_bias_enable(void)
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{
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return 0;
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}
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EXPORT_SYMBOL(display_bias_enable);
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int disp_late_bias_enable(void)
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{
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return 0;
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}
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EXPORT_SYMBOL(disp_late_bias_enable);
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int display_bias_disable(void)
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{
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return 0;
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}
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EXPORT_SYMBOL(display_bias_disable);
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#endif
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