mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-15 08:14:15 +08:00
21ff89b91b
The maple tree register cache is based on a much more modern data structure than the rbtree cache and makes optimisation choices which are probably more appropriate for modern systems than those made by the rbtree cache. Signed-off-by: Bo Liu <liubo03@inspur.com> Link: https://lore.kernel.org/r/20240206071314.8721-13-liubo03@inspur.com Signed-off-by: Lee Jones <lee@kernel.org>
125 lines
3.4 KiB
C
125 lines
3.4 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* Rockchip RK806 Core (SPI) driver
|
|
*
|
|
* Copyright (c) 2021 Rockchip Electronics Co., Ltd.
|
|
* Copyright (c) 2023 Collabora Ltd.
|
|
*
|
|
* Author: Xu Shengfei <xsf@rock-chips.com>
|
|
* Author: Sebastian Reichel <sebastian.reichel@collabora.com>
|
|
*/
|
|
|
|
#include <linux/interrupt.h>
|
|
#include <linux/mfd/core.h>
|
|
#include <linux/mfd/rk808.h>
|
|
#include <linux/module.h>
|
|
#include <linux/regmap.h>
|
|
#include <linux/spi/spi.h>
|
|
|
|
#define RK806_ADDR_SIZE 2
|
|
#define RK806_CMD_WITH_SIZE(CMD, VALUE_BYTES) \
|
|
(RK806_CMD_##CMD | RK806_CMD_CRC_DIS | (VALUE_BYTES - 1))
|
|
|
|
static const struct regmap_range rk806_volatile_ranges[] = {
|
|
regmap_reg_range(RK806_POWER_EN0, RK806_POWER_EN5),
|
|
regmap_reg_range(RK806_DVS_START_CTRL, RK806_INT_MSK1),
|
|
};
|
|
|
|
static const struct regmap_access_table rk806_volatile_table = {
|
|
.yes_ranges = rk806_volatile_ranges,
|
|
.n_yes_ranges = ARRAY_SIZE(rk806_volatile_ranges),
|
|
};
|
|
|
|
static const struct regmap_config rk806_regmap_config_spi = {
|
|
.reg_bits = 16,
|
|
.val_bits = 8,
|
|
.max_register = RK806_BUCK_RSERVE_REG5,
|
|
.cache_type = REGCACHE_MAPLE,
|
|
.volatile_table = &rk806_volatile_table,
|
|
};
|
|
|
|
static int rk806_spi_bus_write(void *context, const void *vdata, size_t count)
|
|
{
|
|
struct device *dev = context;
|
|
struct spi_device *spi = to_spi_device(dev);
|
|
struct spi_transfer xfer[2] = { 0 };
|
|
/* data and thus count includes the register address */
|
|
size_t val_size = count - RK806_ADDR_SIZE;
|
|
char cmd;
|
|
|
|
if (val_size < 1 || val_size > (RK806_CMD_LEN_MSK + 1))
|
|
return -EINVAL;
|
|
|
|
cmd = RK806_CMD_WITH_SIZE(WRITE, val_size);
|
|
|
|
xfer[0].tx_buf = &cmd;
|
|
xfer[0].len = sizeof(cmd);
|
|
xfer[1].tx_buf = vdata;
|
|
xfer[1].len = count;
|
|
|
|
return spi_sync_transfer(spi, xfer, ARRAY_SIZE(xfer));
|
|
}
|
|
|
|
static int rk806_spi_bus_read(void *context, const void *vreg, size_t reg_size,
|
|
void *val, size_t val_size)
|
|
{
|
|
struct device *dev = context;
|
|
struct spi_device *spi = to_spi_device(dev);
|
|
char txbuf[3] = { 0 };
|
|
|
|
if (reg_size != RK806_ADDR_SIZE ||
|
|
val_size < 1 || val_size > (RK806_CMD_LEN_MSK + 1))
|
|
return -EINVAL;
|
|
|
|
/* TX buffer contains command byte followed by two address bytes */
|
|
txbuf[0] = RK806_CMD_WITH_SIZE(READ, val_size);
|
|
memcpy(txbuf+1, vreg, reg_size);
|
|
|
|
return spi_write_then_read(spi, txbuf, sizeof(txbuf), val, val_size);
|
|
}
|
|
|
|
static const struct regmap_bus rk806_regmap_bus_spi = {
|
|
.write = rk806_spi_bus_write,
|
|
.read = rk806_spi_bus_read,
|
|
.reg_format_endian_default = REGMAP_ENDIAN_LITTLE,
|
|
};
|
|
|
|
static int rk8xx_spi_probe(struct spi_device *spi)
|
|
{
|
|
struct regmap *regmap;
|
|
|
|
regmap = devm_regmap_init(&spi->dev, &rk806_regmap_bus_spi,
|
|
&spi->dev, &rk806_regmap_config_spi);
|
|
if (IS_ERR(regmap))
|
|
return dev_err_probe(&spi->dev, PTR_ERR(regmap),
|
|
"Failed to init regmap\n");
|
|
|
|
return rk8xx_probe(&spi->dev, RK806_ID, spi->irq, regmap);
|
|
}
|
|
|
|
static const struct of_device_id rk8xx_spi_of_match[] = {
|
|
{ .compatible = "rockchip,rk806", },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(of, rk8xx_spi_of_match);
|
|
|
|
static const struct spi_device_id rk8xx_spi_id_table[] = {
|
|
{ "rk806", 0 },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(spi, rk8xx_spi_id_table);
|
|
|
|
static struct spi_driver rk8xx_spi_driver = {
|
|
.driver = {
|
|
.name = "rk8xx-spi",
|
|
.of_match_table = rk8xx_spi_of_match,
|
|
},
|
|
.probe = rk8xx_spi_probe,
|
|
.id_table = rk8xx_spi_id_table,
|
|
};
|
|
module_spi_driver(rk8xx_spi_driver);
|
|
|
|
MODULE_AUTHOR("Xu Shengfei <xsf@rock-chips.com>");
|
|
MODULE_DESCRIPTION("RK8xx SPI PMIC driver");
|
|
MODULE_LICENSE("GPL");
|