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rk3588s.dtsi
rk3588s.-pinctrl.dtsi该文件枚举了3588所有的iomux实例
查看引脚的复用情况
cat /sys/kernel/debug/pinctrl/pinctrl-rockchip-pinctrl/pinmux-pins
RK3588频脚计算方式与一般的计算方式没有区别：
GPIO pin脚计算公式：pin = bank * 32 + number
GPIO 小组编号计算公式：number = group * 8 + X
摘自官网：
下面演示GPIO1_D0 pin脚计算方法：
bank = 1; //GPIO1_D0 => 1, bank ∈ [0,4]
group = 3; //GPIO1_D0 => 3, group ∈ {(A=0), (B=1), (C=2), (D=3)}
X = 0; //GPIO1_D0 => 0, X ∈ [0,7]
number = group * 8 + X = 3 * 8 + 0 = 24
pin = bank*32 + number= 1 * 32 + 24 = 56;
GPIO1_D0 对应的设备树属性描述为:<&gpio1 24 GPIO_ACTIVE_HIGH>,由kernel-5.10/include/dt-bindings/pinctrl/rockchip.h的
的宏定义可知，也可以将GPIO1_D0描述为<&gpio1 RK_PD0 GPIO_ACTIVE_HIGH>。
rockchip_pinctrl_parse_dt
info->groups = devm_kcalloc(dev, info->ngroups, sizeof(*info->groups), GFP_KERNEL);
rockchip_pinctrl_parse_functions
rockchip_pinctrl_parse_groups
pinconf_generic_parse_dt_config
parse_dt_cfg
pinconf_to_config_packed
PIN_CONF_PACKED
#define PIN_CONF_PACKED(p, a) ((a << 8) | ((unsigned long) p & 0xffUL))
5,1
105
of_property_read_u32(np, par->property, &val);
of_property_read_u32_array(np, property, val, 1);
of_property_read_variable_u32_array(np, property, val, 1, 0);
of_find_property_value_of_size(np, property, 4, 0, &sz);
pinctrl_show
pinconf_show_setting
pinconf_show_config
setting->data.configs.configs
add_setting
pinconf_map_to_setting
setting->data.configs.configs = map->data.configs.configs;
rockchip_dt_node_to_map
pinctrl_name_to_group
rockchip_pin_group * grp = info->groups[i]
new_map[i].data.configs.configs = grp->data[i].configs;
rockchip_pmx_set
const struct rockchip_pin_config *data = info->groups[group].data;
rockchip_pin_group
uart1 {
/omit-if-no-ref/
uart1m1_xfer: uart1m1-xfer {
rockchip,pins =
/* uart1_rx_m1 */
<1 RK_PB7 10 &pcfg_pull_up>,
/* uart1_tx_m1 */
<1 RK_PB6 10 &pcfg_pull_up>;
};
pcfg_pull_up
bias-pull-up;
static const struct pinconf_generic_params dt_params[] = {
{ "bias-bus-hold", PIN_CONFIG_BIAS_BUS_HOLD, 0 },
{ "bias-disable", PIN_CONFIG_BIAS_DISABLE, 0 },
{ "bias-high-impedance", PIN_CONFIG_BIAS_HIGH_IMPEDANCE, 0 },
{ "bias-pull-up", PIN_CONFIG_BIAS_PULL_UP, 1 },
static const struct pin_config_item conf_items[] = {
PCONFDUMP(PIN_CONFIG_BIAS_PULL_UP, "input bias pull up", "ohms", true),
enum pin_config_param {
PIN_CONFIG_BIAS_BUS_HOLD,
PIN_CONFIG_BIAS_DISABLE,
PIN_CONFIG_BIAS_HIGH_IMPEDANCE,
PIN_CONFIG_BIAS_PULL_DOWN,
PIN_CONFIG_BIAS_PULL_PIN_DEFAULT,
PIN_CONFIG_BIAS_PULL_UP, //5
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