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drivers: pinctrl_emsdp: add dummy mux for unmuxed peripheral

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ARC EMSDP board has some peripherals are internal connected,
such as DW spi1 and DFSS i2c0. They are unmuxed and have fix
connection to spi-flash or sensor. For these peripheral, add
dummy mux type to avoid pinctrl ENOENT error.

Signed-off-by: Siyuan Cheng <siyuanc@synopsys.com>
This commit is contained in:
Siyuan Cheng 2023-06-05 14:44:57 +08:00 • committed by Anas Nashif
commit 1a6b6e7b84
4 changed files with 13 additions and 0 deletions
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5
boards/arc/emsdp/emsdp-pinctrl.dtsi
View file

@ -130,4 +130,9 @@
arduino_CFG6_i2c: arduino_CFG6_i2c {
pinmux = <ARDUINO_PIN_AD5 ARDUINO_I2C>;
};
/* INNER_CONNECT, DUMMY MUX */
unmuxed_pin: unmuxed_pin {
pinmux = <INNER_CONNECT NOT_PINMUX>;
};
};

2
boards/arc/emsdp/emsdp.dts
View file

@ -49,6 +49,8 @@
spi@f1000000 {
interrupts = <84 1>;
pinctrl-0 = <&unmuxed_pin>;
pinctrl-names = "default";
};
spi@80010000 {

4
drivers/pinctrl/pinctrl_emsdp.c
View file

@ -103,6 +103,10 @@ static int pinctrl_emsdp_set(uint32_t pin, uint32_t type)
const uint32_t mux_regs = (EMSDP_CREG_BASE + EMSDP_CREG_PMOD_MUX_OFFSET);
uint32_t reg;
if (pin == INNER_CONNECT) {
return 0;
}
if (pin <= PMOD_C) {
reg = sys_read32(mux_regs + PMOD_MUX_CTRL);
} else {

2
include/zephyr/dt-bindings/pinctrl/emsdp-pinctrl.h
View file

@ -37,6 +37,7 @@
#define ARDUINO_PIN_AD3 20
#define ARDUINO_PIN_AD4 21
#define ARDUINO_PIN_AD5 22
#define INNER_CONNECT 23
#define PMOD_GPIO 0
#define PMOD_UARTA 1
@ -52,6 +53,7 @@
#define ARDUINO_I2C 11
#define ARDUINO_PWM 12
#define ARDUINO_ADC 13
#define NOT_PINMUX 14
#endif /* ZEPHYR_INCLUDE_DT_BINDINGS_PINCTRL_EMSDP_PINCTRL_H_ */