mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-14 15:54:15 +08:00
14100f8e58
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> Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org> Link: https://lore.kernel.org/r/20240206071314.8721-9-liubo03@inspur.com Signed-off-by: Lee Jones <lee@kernel.org>
144 lines
3.5 KiB
C
144 lines
3.5 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* Driver for Khadas System control Microcontroller
|
|
*
|
|
* Copyright (C) 2020 BayLibre SAS
|
|
*
|
|
* Author(s): Neil Armstrong <narmstrong@baylibre.com>
|
|
*/
|
|
#include <linux/bitfield.h>
|
|
#include <linux/i2c.h>
|
|
#include <linux/mfd/core.h>
|
|
#include <linux/mfd/khadas-mcu.h>
|
|
#include <linux/module.h>
|
|
#include <linux/regmap.h>
|
|
|
|
static bool khadas_mcu_reg_volatile(struct device *dev, unsigned int reg)
|
|
{
|
|
if (reg >= KHADAS_MCU_USER_DATA_0_REG &&
|
|
reg < KHADAS_MCU_PWR_OFF_CMD_REG)
|
|
return true;
|
|
|
|
switch (reg) {
|
|
case KHADAS_MCU_PWR_OFF_CMD_REG:
|
|
case KHADAS_MCU_PASSWD_START_REG:
|
|
case KHADAS_MCU_CHECK_VEN_PASSWD_REG:
|
|
case KHADAS_MCU_CHECK_USER_PASSWD_REG:
|
|
case KHADAS_MCU_WOL_INIT_START_REG:
|
|
case KHADAS_MCU_CMD_FAN_STATUS_CTRL_REG:
|
|
return true;
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
static bool khadas_mcu_reg_writeable(struct device *dev, unsigned int reg)
|
|
{
|
|
switch (reg) {
|
|
case KHADAS_MCU_PASSWD_VEN_0_REG:
|
|
case KHADAS_MCU_PASSWD_VEN_1_REG:
|
|
case KHADAS_MCU_PASSWD_VEN_2_REG:
|
|
case KHADAS_MCU_PASSWD_VEN_3_REG:
|
|
case KHADAS_MCU_PASSWD_VEN_4_REG:
|
|
case KHADAS_MCU_PASSWD_VEN_5_REG:
|
|
case KHADAS_MCU_MAC_0_REG:
|
|
case KHADAS_MCU_MAC_1_REG:
|
|
case KHADAS_MCU_MAC_2_REG:
|
|
case KHADAS_MCU_MAC_3_REG:
|
|
case KHADAS_MCU_MAC_4_REG:
|
|
case KHADAS_MCU_MAC_5_REG:
|
|
case KHADAS_MCU_USID_0_REG:
|
|
case KHADAS_MCU_USID_1_REG:
|
|
case KHADAS_MCU_USID_2_REG:
|
|
case KHADAS_MCU_USID_3_REG:
|
|
case KHADAS_MCU_USID_4_REG:
|
|
case KHADAS_MCU_USID_5_REG:
|
|
case KHADAS_MCU_VERSION_0_REG:
|
|
case KHADAS_MCU_VERSION_1_REG:
|
|
case KHADAS_MCU_DEVICE_NO_0_REG:
|
|
case KHADAS_MCU_DEVICE_NO_1_REG:
|
|
case KHADAS_MCU_FACTORY_TEST_REG:
|
|
case KHADAS_MCU_SHUTDOWN_NORMAL_STATUS_REG:
|
|
return false;
|
|
default:
|
|
return true;
|
|
}
|
|
}
|
|
|
|
static const struct regmap_config khadas_mcu_regmap_config = {
|
|
.reg_bits = 8,
|
|
.reg_stride = 1,
|
|
.val_bits = 8,
|
|
.max_register = KHADAS_MCU_CMD_FAN_STATUS_CTRL_REG,
|
|
.volatile_reg = khadas_mcu_reg_volatile,
|
|
.writeable_reg = khadas_mcu_reg_writeable,
|
|
.cache_type = REGCACHE_MAPLE,
|
|
};
|
|
|
|
static struct mfd_cell khadas_mcu_fan_cells[] = {
|
|
/* VIM1/2 Rev13+ and VIM3 only */
|
|
{ .name = "khadas-mcu-fan-ctrl", },
|
|
};
|
|
|
|
static struct mfd_cell khadas_mcu_cells[] = {
|
|
{ .name = "khadas-mcu-user-mem", },
|
|
};
|
|
|
|
static int khadas_mcu_probe(struct i2c_client *client)
|
|
{
|
|
struct device *dev = &client->dev;
|
|
struct khadas_mcu *ddata;
|
|
int ret;
|
|
|
|
ddata = devm_kzalloc(dev, sizeof(*ddata), GFP_KERNEL);
|
|
if (!ddata)
|
|
return -ENOMEM;
|
|
|
|
i2c_set_clientdata(client, ddata);
|
|
|
|
ddata->dev = dev;
|
|
|
|
ddata->regmap = devm_regmap_init_i2c(client, &khadas_mcu_regmap_config);
|
|
if (IS_ERR(ddata->regmap)) {
|
|
ret = PTR_ERR(ddata->regmap);
|
|
dev_err(dev, "Failed to allocate register map: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
ret = devm_mfd_add_devices(dev, PLATFORM_DEVID_NONE,
|
|
khadas_mcu_cells,
|
|
ARRAY_SIZE(khadas_mcu_cells),
|
|
NULL, 0, NULL);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (of_property_present(dev->of_node, "#cooling-cells"))
|
|
return devm_mfd_add_devices(dev, PLATFORM_DEVID_NONE,
|
|
khadas_mcu_fan_cells,
|
|
ARRAY_SIZE(khadas_mcu_fan_cells),
|
|
NULL, 0, NULL);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_OF
|
|
static const struct of_device_id khadas_mcu_of_match[] = {
|
|
{ .compatible = "khadas,mcu", },
|
|
{},
|
|
};
|
|
MODULE_DEVICE_TABLE(of, khadas_mcu_of_match);
|
|
#endif
|
|
|
|
static struct i2c_driver khadas_mcu_driver = {
|
|
.driver = {
|
|
.name = "khadas-mcu-core",
|
|
.of_match_table = of_match_ptr(khadas_mcu_of_match),
|
|
},
|
|
.probe = khadas_mcu_probe,
|
|
};
|
|
module_i2c_driver(khadas_mcu_driver);
|
|
|
|
MODULE_DESCRIPTION("Khadas MCU core driver");
|
|
MODULE_AUTHOR("Neil Armstrong <narmstrong@baylibre.com>");
|
|
MODULE_LICENSE("GPL v2");
|