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// SPDX-License-Identifier: GPL-2.0-only
/*
* Rockchip RK808/RK818 Core (I2C) driver
*
* Copyright (c) 2014, Fuzhou Rockchip Electronics Co., Ltd
* Copyright (C) 2016 PHYTEC Messtechnik GmbH
*
* Author: Chris Zhong <zyw@rock-chips.com>
* Author: Zhang Qing <zhangqing@rock-chips.com>
* Author: Wadim Egorov <w.egorov@phytec.de>
*/
#include <linux/i2c.h>
#include <linux/mfd/rk808.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/regmap.h>
struct rk8xx_i2c_platform_data {
const struct regmap_config *regmap_cfg;
int variant;
};
static bool rk808_is_volatile_reg(struct device *dev, unsigned int reg)
{
/*
* Notes:
* - Technically the ROUND_30s bit makes RTC_CTRL_REG volatile, but
* we don't use that feature. It's better to cache.
* - It's unlikely we care that RK808_DEVCTRL_REG is volatile since
* bits are cleared in case when we shutoff anyway, but better safe.
*/
switch (reg) {
case RK808_SECONDS_REG ... RK808_WEEKS_REG:
case RK808_RTC_STATUS_REG:
case RK808_VB_MON_REG:
case RK808_THERMAL_REG:
case RK808_DCDC_UV_STS_REG:
case RK808_LDO_UV_STS_REG:
case RK808_DCDC_PG_REG:
case RK808_LDO_PG_REG:
case RK808_DEVCTRL_REG:
case RK808_INT_STS_REG1:
case RK808_INT_STS_REG2:
return true;
}
return false;
}
static bool rk817_is_volatile_reg(struct device *dev, unsigned int reg)
{
/*
* Notes:
* - Technically the ROUND_30s bit makes RTC_CTRL_REG volatile, but
* we don't use that feature. It's better to cache.
*/
switch (reg) {
case RK817_SECONDS_REG ... RK817_WEEKS_REG:
case RK817_RTC_STATUS_REG:
case RK817_CODEC_DTOP_LPT_SRST:
case RK817_GAS_GAUGE_ADC_CONFIG0 ... RK817_GAS_GAUGE_CUR_ADC_K0:
case RK817_PMIC_CHRG_STS:
case RK817_PMIC_CHRG_OUT:
case RK817_PMIC_CHRG_IN:
case RK817_INT_STS_REG0:
case RK817_INT_STS_REG1:
case RK817_INT_STS_REG2:
case RK817_SYS_STS:
return true;
}
return false;
}
static const struct regmap_config rk818_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = RK818_USB_CTRL_REG,
.cache_type = REGCACHE_MAPLE,
.volatile_reg = rk808_is_volatile_reg,
};
static const struct regmap_config rk805_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = RK805_OFF_SOURCE_REG,
.cache_type = REGCACHE_MAPLE,
.volatile_reg = rk808_is_volatile_reg,
};
static const struct regmap_config rk808_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = RK808_IO_POL_REG,
.cache_type = REGCACHE_MAPLE,
.volatile_reg = rk808_is_volatile_reg,
};
static const struct regmap_config rk817_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = RK817_GPIO_INT_CFG,
.cache_type = REGCACHE_NONE,
.volatile_reg = rk817_is_volatile_reg,
};
static const struct rk8xx_i2c_platform_data rk805_data = {
.regmap_cfg = &rk805_regmap_config,
.variant = RK805_ID,
};
static const struct rk8xx_i2c_platform_data rk808_data = {
.regmap_cfg = &rk808_regmap_config,
.variant = RK808_ID,
};
static const struct rk8xx_i2c_platform_data rk809_data = {
.regmap_cfg = &rk817_regmap_config,
.variant = RK809_ID,
};
static const struct rk8xx_i2c_platform_data rk817_data = {
.regmap_cfg = &rk817_regmap_config,
.variant = RK817_ID,
};
static const struct rk8xx_i2c_platform_data rk818_data = {
.regmap_cfg = &rk818_regmap_config,
.variant = RK818_ID,
};
static int rk8xx_i2c_probe(struct i2c_client *client)
{
const struct rk8xx_i2c_platform_data *data;
struct regmap *regmap;
data = device_get_match_data(&client->dev);
if (!data)
return -ENODEV;
regmap = devm_regmap_init_i2c(client, data->regmap_cfg);
if (IS_ERR(regmap))
return dev_err_probe(&client->dev, PTR_ERR(regmap),
"regmap initialization failed\n");
return rk8xx_probe(&client->dev, data->variant, client->irq, regmap);
}
static void rk8xx_i2c_shutdown(struct i2c_client *client)
{
rk8xx_shutdown(&client->dev);
}
static SIMPLE_DEV_PM_OPS(rk8xx_i2c_pm_ops, rk8xx_suspend, rk8xx_resume);
static const struct of_device_id rk8xx_i2c_of_match[] = {
{ .compatible = "rockchip,rk805", .data = &rk805_data },
{ .compatible = "rockchip,rk808", .data = &rk808_data },
{ .compatible = "rockchip,rk809", .data = &rk809_data },
{ .compatible = "rockchip,rk817", .data = &rk817_data },
{ .compatible = "rockchip,rk818", .data = &rk818_data },
{ },
};
MODULE_DEVICE_TABLE(of, rk8xx_i2c_of_match);
static struct i2c_driver rk8xx_i2c_driver = {
.driver = {
.name = "rk8xx-i2c",
.of_match_table = rk8xx_i2c_of_match,
.pm = &rk8xx_i2c_pm_ops,
},
.probe = rk8xx_i2c_probe,
.shutdown = rk8xx_i2c_shutdown,
};
module_i2c_driver(rk8xx_i2c_driver);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Chris Zhong <zyw@rock-chips.com>");
MODULE_AUTHOR("Zhang Qing <zhangqing@rock-chips.com>");
MODULE_AUTHOR("Wadim Egorov <w.egorov@phytec.de>");
MODULE_DESCRIPTION("RK8xx I2C PMIC driver");
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