386 lines
9.9 KiB
C
Executable file
386 lines
9.9 KiB
C
Executable file
/*
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* s2mps26.c - mfd core driver for the s2mps26
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*
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* Copyright (C) 2021 Samsung Electronics
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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 as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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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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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/i2c.h>
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#include <linux/irq.h>
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#include <linux/interrupt.h>
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#include <linux/mutex.h>
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#include <linux/mfd/core.h>
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#include <linux/mfd/samsung/s2mps26.h>
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#include <linux/mfd/samsung/s2mps26-regulator.h>
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#include <linux/regulator/machine.h>
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#include <linux/rtc.h>
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#if IS_ENABLED(CONFIG_EXYNOS_ACPM)
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#include <soc/samsung/acpm_mfd.h>
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#define SUB_CHANNEL 1
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#endif
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#if IS_ENABLED(CONFIG_OF)
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#include <linux/of_device.h>
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#include <linux/of_gpio.h>
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#endif /* CONFIG_OF */
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#define I2C_ADDR_VGPIO 0x00
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#define I2C_ADDR_COM 0x03
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#define I2C_ADDR_PMIC1 0x05
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#define I2C_ADDR_PMIC2 0x06
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#define I2C_ADDR_CLOSE1 0x0E
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#define I2C_ADDR_CLOSE2 0x0F
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#define I2C_ADDR_ADC 0x0A
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#define I2C_ADDR_GPIO 0x0B
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#define I2C_ADDR_TEMP 0x0C
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#if IS_ENABLED(CONFIG_EXYNOS_ACPM)
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static struct device_node *acpm_mfd_node;
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#endif
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static struct mfd_cell s2mps26_devs[] = {
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{ .name = "s2mps26-regulator", },
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{ .name = "s2mps26-gpio", },
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};
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int s2mps26_read_reg(struct i2c_client *i2c, uint8_t reg, uint8_t *dest)
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{
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#if IS_ENABLED(CONFIG_EXYNOS_ACPM)
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struct s2mps26_dev *s2mps26 = i2c_get_clientdata(i2c);
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int ret;
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mutex_lock(&s2mps26->i2c_lock);
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ret = exynos_acpm_read_reg(acpm_mfd_node, SUB_CHANNEL, i2c->addr, reg, dest);
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mutex_unlock(&s2mps26->i2c_lock);
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if (ret) {
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pr_err("[%s] acpm ipc fail!\n", __func__);
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return ret;
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}
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#endif
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return 0;
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}
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EXPORT_SYMBOL_GPL(s2mps26_read_reg);
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int s2mps26_bulk_read(struct i2c_client *i2c, uint8_t reg, int count, uint8_t *buf)
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{
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#if IS_ENABLED(CONFIG_EXYNOS_ACPM)
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struct s2mps26_dev *s2mps26 = i2c_get_clientdata(i2c);
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int ret;
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mutex_lock(&s2mps26->i2c_lock);
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ret = exynos_acpm_bulk_read(acpm_mfd_node, SUB_CHANNEL, i2c->addr, reg, count, buf);
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mutex_unlock(&s2mps26->i2c_lock);
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if (ret) {
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pr_err("[%s] acpm ipc fail!\n", __func__);
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return ret;
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}
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#endif
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return 0;
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}
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EXPORT_SYMBOL_GPL(s2mps26_bulk_read);
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int s2mps26_write_reg(struct i2c_client *i2c, uint8_t reg, uint8_t value)
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{
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int ret = 0;
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#if IS_ENABLED(CONFIG_EXYNOS_ACPM)
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struct s2mps26_dev *s2mps26 = i2c_get_clientdata(i2c);
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mutex_lock(&s2mps26->i2c_lock);
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ret = exynos_acpm_write_reg(acpm_mfd_node, SUB_CHANNEL, i2c->addr, reg, value);
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mutex_unlock(&s2mps26->i2c_lock);
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if (ret) {
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pr_err("[%s] acpm ipc fail!\n", __func__);
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return ret;
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}
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#endif
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return ret;
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}
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EXPORT_SYMBOL_GPL(s2mps26_write_reg);
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int s2mps26_bulk_write(struct i2c_client *i2c, uint8_t reg, int count, uint8_t *buf)
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{
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int ret = 0;
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#if IS_ENABLED(CONFIG_EXYNOS_ACPM)
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struct s2mps26_dev *s2mps26 = i2c_get_clientdata(i2c);
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mutex_lock(&s2mps26->i2c_lock);
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ret = exynos_acpm_bulk_write(acpm_mfd_node, SUB_CHANNEL, i2c->addr, reg, count, buf);
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mutex_unlock(&s2mps26->i2c_lock);
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if (ret) {
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pr_err("[%s] acpm ipc fail!\n", __func__);
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return ret;
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}
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#endif
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return ret;
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}
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EXPORT_SYMBOL_GPL(s2mps26_bulk_write);
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int s2mps26_update_reg(struct i2c_client *i2c, uint8_t reg, uint8_t val, uint8_t mask)
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{
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int ret = 0;
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#if IS_ENABLED(CONFIG_EXYNOS_ACPM)
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struct s2mps26_dev *s2mps26 = i2c_get_clientdata(i2c);
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mutex_lock(&s2mps26->i2c_lock);
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ret = exynos_acpm_update_reg(acpm_mfd_node, SUB_CHANNEL, i2c->addr, reg, val, mask);
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mutex_unlock(&s2mps26->i2c_lock);
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if (ret) {
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pr_err("[%s] acpm ipc fail!\n", __func__);
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return ret;
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}
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#endif
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return ret;
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}
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EXPORT_SYMBOL_GPL(s2mps26_update_reg);
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#if IS_ENABLED(CONFIG_OF)
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static int of_s2mps26_dt(struct device *dev,
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struct s2mps26_platform_data *pdata,
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struct s2mps26_dev *s2mps26)
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{
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struct device_node *np = dev->of_node;
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int strlen;
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const char *status;
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if (!np)
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return -EINVAL;
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#if IS_ENABLED(CONFIG_EXYNOS_ACPM)
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acpm_mfd_node = np;
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#endif
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status = of_get_property(np, "s2mps26,wakeup", &strlen);
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if (status == NULL)
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return -EINVAL;
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if (strlen > 0) {
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if (!strcmp(status, "enabled") || !strcmp(status, "okay"))
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pdata->wakeup = true;
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else
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pdata->wakeup = false;
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}
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return 0;
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}
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#else
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static int of_s2mps26_dt(struct device *dev,
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struct s2mps26_platform_data *pdata)
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{
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return 0;
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}
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#endif /* CONFIG_OF */
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static int s2mps26_i2c_probe(struct i2c_client *i2c, const struct i2c_device_id *dev_id)
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{
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struct s2mps26_dev *s2mps26;
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struct s2mps26_platform_data *pdata = i2c->dev.platform_data;
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uint8_t reg_data;
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int ret = 0;
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pr_info("[PMIC] %s: start\n", __func__);
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s2mps26 = devm_kzalloc(&i2c->dev, sizeof(struct s2mps26_dev), GFP_KERNEL);
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if (!s2mps26)
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return -ENOMEM;
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if (i2c->dev.of_node) {
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pdata = devm_kzalloc(&i2c->dev,
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sizeof(struct s2mps26_platform_data),
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GFP_KERNEL);
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if (!pdata)
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return -ENOMEM;
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ret = of_s2mps26_dt(&i2c->dev, pdata, s2mps26);
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if (ret < 0) {
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dev_err(&i2c->dev, "Failed to get device of_node\n");
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goto err;
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}
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i2c->dev.platform_data = pdata;
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} else
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pdata = i2c->dev.platform_data;
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s2mps26->dev = &i2c->dev;
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i2c->addr = I2C_ADDR_COM; /* forced COMMON address */
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s2mps26->i2c = i2c;
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s2mps26->device_type = S2MPS26X;
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if (pdata) {
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s2mps26->pdata = pdata;
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s2mps26->wakeup = pdata->wakeup;
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} else {
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ret = -EINVAL;
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goto err;
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}
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mutex_init(&s2mps26->i2c_lock);
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i2c_set_clientdata(i2c, s2mps26);
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ret = s2mps26_read_reg(i2c, S2MPS26_REG_CHIP_ID, ®_data);
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if (ret < 0) {
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dev_err(s2mps26->dev,
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"device not found on this channel (this is not an error)\n");
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ret = -ENODEV;
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goto err_w_lock;
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} else
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s2mps26->pmic_rev = reg_data; /* print rev */
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s2mps26->vgpio = devm_i2c_new_dummy_device(s2mps26->dev, i2c->adapter, I2C_ADDR_TEMP);
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s2mps26->vgpio->addr = I2C_ADDR_VGPIO;
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s2mps26->pmic1 = devm_i2c_new_dummy_device(s2mps26->dev, i2c->adapter, I2C_ADDR_PMIC1);
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s2mps26->pmic2 = devm_i2c_new_dummy_device(s2mps26->dev, i2c->adapter, I2C_ADDR_PMIC2);
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s2mps26->close1 = devm_i2c_new_dummy_device(s2mps26->dev, i2c->adapter, I2C_ADDR_CLOSE1);
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s2mps26->close2 = devm_i2c_new_dummy_device(s2mps26->dev, i2c->adapter, I2C_ADDR_CLOSE2);
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s2mps26->adc_i2c = devm_i2c_new_dummy_device(s2mps26->dev, i2c->adapter, I2C_ADDR_ADC);
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s2mps26->gpio = devm_i2c_new_dummy_device(s2mps26->dev, i2c->adapter, I2C_ADDR_GPIO);
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i2c_set_clientdata(s2mps26->vgpio, s2mps26);
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i2c_set_clientdata(s2mps26->pmic1, s2mps26);
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i2c_set_clientdata(s2mps26->pmic2, s2mps26);
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i2c_set_clientdata(s2mps26->close1, s2mps26);
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i2c_set_clientdata(s2mps26->close2, s2mps26);
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i2c_set_clientdata(s2mps26->adc_i2c, s2mps26);
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i2c_set_clientdata(s2mps26->gpio, s2mps26);
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pr_info("%s: device found: rev.0x%02hhx\n", __func__, s2mps26->pmic_rev);
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/* init slave PMIC notifier */
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ret = s2mps26_notifier_init(s2mps26);
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if (ret < 0)
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pr_err("%s: s2mps26_notifier_init fail\n", __func__);
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ret = devm_mfd_add_devices(s2mps26->dev, -1, s2mps26_devs,
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ARRAY_SIZE(s2mps26_devs), NULL, 0, NULL);
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if (ret < 0)
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goto err_w_lock;
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ret = device_init_wakeup(s2mps26->dev, pdata->wakeup);
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if (ret < 0) {
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pr_err("%s: device_init_wakeup fail(%d)\n", __func__, ret);
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goto err_w_lock;
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}
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pr_info("[PMIC] %s: end\n", __func__);
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return ret;
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err_w_lock:
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mutex_destroy(&s2mps26->i2c_lock);
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err:
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return ret;
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}
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static int s2mps26_i2c_remove(struct i2c_client *i2c)
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{
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struct s2mps26_dev *s2mps26 = i2c_get_clientdata(i2c);
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if(s2mps26->pdata->wakeup)
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device_init_wakeup(s2mps26->dev, false);
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s2mps26_notifier_deinit(s2mps26);
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mutex_destroy(&s2mps26->i2c_lock);
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return 0;
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}
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static const struct i2c_device_id s2mps26_i2c_id[] = {
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{ MFD_DEV_NAME, TYPE_S2MPS26 },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, s2mps26_i2c_id);
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#if IS_ENABLED(CONFIG_OF)
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static struct of_device_id s2mps26_i2c_dt_ids[] = {
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{ .compatible = "samsung,s2mps26mfd" },
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{ },
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};
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#endif /* CONFIG_OF */
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#if IS_ENABLED(CONFIG_PM)
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static int s2mps26_suspend(struct device *dev)
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{
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struct i2c_client *i2c = to_i2c_client(dev);
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struct s2mps26_dev *s2mps26 = i2c_get_clientdata(i2c);
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dev->power.must_resume = true;
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if (device_may_wakeup(dev))
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enable_irq_wake(s2mps26->irq);
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disable_irq(s2mps26->irq);
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return 0;
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}
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static int s2mps26_resume(struct device *dev)
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{
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struct i2c_client *i2c = to_i2c_client(dev);
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struct s2mps26_dev *s2mps26 = i2c_get_clientdata(i2c);
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#if !IS_ENABLED(CONFIG_SAMSUNG_PRODUCT_SHIP)
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pr_info("%s: %s\n", MFD_DEV_NAME, __func__);
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#endif /* CONFIG_SAMSUNG_PRODUCT_SHIP */
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if (device_may_wakeup(dev))
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disable_irq_wake(s2mps26->irq);
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enable_irq(s2mps26->irq);
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return 0;
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}
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#else
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#define s2mps26_suspend NULL
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#define s2mps26_resume NULL
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#endif /* CONFIG_PM */
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static const struct dev_pm_ops s2mps26_pm = {
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.suspend_late = s2mps26_suspend,
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.resume_early = s2mps26_resume,
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};
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static struct i2c_driver s2mps26_i2c_driver = {
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.driver = {
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.name = MFD_DEV_NAME,
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.owner = THIS_MODULE,
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#if IS_ENABLED(CONFIG_PM)
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.pm = &s2mps26_pm,
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#endif /* CONFIG_PM */
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#if IS_ENABLED(CONFIG_OF)
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.of_match_table = s2mps26_i2c_dt_ids,
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#endif /* CONFIG_OF */
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.suppress_bind_attrs = true,
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},
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.probe = s2mps26_i2c_probe,
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.remove = s2mps26_i2c_remove,
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.id_table = s2mps26_i2c_id,
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};
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static int __init s2mps26_i2c_init(void)
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{
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pr_info("[PMIC] %s: %s\n", MFD_DEV_NAME, __func__);
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return i2c_add_driver(&s2mps26_i2c_driver);
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}
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/* init early so consumer devices can complete system boot */
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subsys_initcall(s2mps26_i2c_init);
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static void __exit s2mps26_i2c_exit(void)
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{
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i2c_del_driver(&s2mps26_i2c_driver);
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}
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module_exit(s2mps26_i2c_exit);
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MODULE_DESCRIPTION("s2mps26 multi-function core driver");
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MODULE_AUTHOR("Samsung Electronics");
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MODULE_LICENSE("GPL");
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