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Driver: gpio: Add support of Open Drain GPIO for STM32 #13190

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Driver: gpio: Add support of Open Drain GPIO for STM32 #13190

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5 changes: 5 additions & 0 deletions drivers/gpio/gpio_stm32.c
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Original file line number Diff line number Diff line change
Expand Up @@ -50,6 +50,11 @@ const int gpio_stm32_flags_to_conf(int flags, int *pincfg)

if (direction == GPIO_DIR_OUT) {
*pincfg = STM32_PINCFG_MODE_OUTPUT;
if (pud == GPIO_OPEN_DRAIN) {
*pincfg |= STM32_PINCFG_OPEN_DRAIN;
} else {
*pincfg |= STM32_PINCFG_PUSH_PULL;
}
} else {
/* pull-{up,down} maybe? */
*pincfg = STM32_PINCFG_MODE_INPUT;
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7 changes: 5 additions & 2 deletions drivers/gpio/gpio_stm32.h
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Original file line number Diff line number Diff line change
Expand Up @@ -137,8 +137,9 @@

#ifdef CONFIG_SOC_SERIES_STM32F1X
#define STM32_PINCFG_MODE_OUTPUT (STM32_MODE_OUTPUT \
| STM32_CNF_GP_OUTPUT \
| STM32_CNF_PUSH_PULL)
| STM32_CNF_GP_OUTPUT)
#define STM32_PINCFG_PUSH_PULL STM32_CNF_PUSH_PULL
#define STM32_PINCFG_OPEN_DRAIN STM32_CNF_OPEN_DRAIN
#define STM32_PINCFG_MODE_INPUT STM32_MODE_INPUT
#define STM32_PINCFG_PULL_UP (STM32_CNF_IN_PUPD | STM32_PUPD_PULL_UP)
#define STM32_PINCFG_PULL_DOWN (STM32_CNF_IN_PUPD | \
Expand All @@ -147,6 +148,8 @@
STM32_PUPD_NO_PULL)
#else
#define STM32_PINCFG_MODE_OUTPUT STM32_MODER_OUTPUT_MODE
#define STM32_PINCFG_PUSH_PULL STM32_OTYPER_PUSH_PULL
#define STM32_PINCFG_OPEN_DRAIN STM32_OTYPER_OPEN_DRAIN
#define STM32_PINCFG_MODE_INPUT STM32_MODER_INPUT_MODE
#define STM32_PINCFG_PULL_UP STM32_PUPDR_PULL_UP
#define STM32_PINCFG_PULL_DOWN STM32_PUPDR_PULL_DOWN
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3 changes: 3 additions & 0 deletions include/dt-bindings/gpio/gpio.h
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Expand Up @@ -97,6 +97,9 @@
/** Enable GPIO pin pull-down. */
#define GPIO_PUD_PULL_DOWN (2 << GPIO_PUD_POS)

/** Enable GPIO pin open drain. */
#define GPIO_OPEN_DRAIN (3 << GPIO_PUD_POS)

/** @cond INTERNAL_HIDDEN */
#define GPIO_PUD_MASK (3 << GPIO_PUD_POS)
/** @endcond */
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