drivers: pinctrl: max32: fix correct configuring drive strength

This commit fixes configuring pin drive strength in pinctrl driver.
Previously, there was a mismatch while filling pincfg and checking
pincfg drive strength field. This fix simplifies the operation and
avoids gpio driver header dependency.

Signed-off-by: Mert Ekren <[email protected]>
Co-Authored-By: Sadik Ozer <[email protected]>

Author: 2 people

drivers/pinctrl/pinctrl_max32.c

@@ -5,7 +5,6 @@
  */
 
 #include <zephyr/dt-bindings/pinctrl/max32-pinctrl.h>
-#include <zephyr/dt-bindings/gpio/adi-max32-gpio.h>
 #include <zephyr/drivers/pinctrl.h>
 
 #include <gpio.h>
@@ -67,20 +66,7 @@ static int pinctrl_configure_pin(pinctrl_soc_pin_t soc_pin)
 		gpio_cfg.vssel = MXC_GPIO_VSSEL_VDDIO;
 	}
 
-	switch (pincfg & MAX32_GPIO_DRV_STRENGTH_MASK) {
-	case MAX32_GPIO_DRV_STRENGTH_1:
-		gpio_cfg.drvstr = MXC_GPIO_DRVSTR_1;
-		break;
-	case MAX32_GPIO_DRV_STRENGTH_2:
-		gpio_cfg.drvstr = MXC_GPIO_DRVSTR_2;
-		break;
-	case MAX32_GPIO_DRV_STRENGTH_3:
-		gpio_cfg.drvstr = MXC_GPIO_DRVSTR_3;
-		break;
-	default:
-		gpio_cfg.drvstr = MXC_GPIO_DRVSTR_0;
-		break;
-	}
+	gpio_cfg.drvstr = (pincfg >> MAX32_DRV_STRENGTH_SHIFT) & MAX32_DRV_STRENGTH_MASK;
 
 	if (MXC_GPIO_Config(&gpio_cfg) != 0) {
 		return -ENOTSUP;

include/zephyr/dt-bindings/pinctrl/max32-pinctrl.h

@@ -63,5 +63,6 @@
 #define MAX32_POWER_SOURCE_SHIFT   0x04
 #define MAX32_OUTPUT_HIGH_SHIFT    0x05
 #define MAX32_DRV_STRENGTH_SHIFT   0x06 /* 2 bits */
+#define MAX32_DRV_STRENGTH_MASK    0x03
 
 #endif /* ZEPHYR_INCLUDE_DT_BINDINGS_PINCTRL_MAX32_PINCTRL_H_ */