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drivers: dac: stm32: add support for pinmux

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Add support for DT based pinmux configurations.

Signed-off-by: Martin Jäger <martin@libre.solar>
This commit is contained in:
Martin Jäger 2020-10-08 08:37:53 +02:00 • committed by Maureen Helm
commit 1de10bdb9b
2 changed files with 28 additions and 1 deletions
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20
drivers/dac/dac_stm32.c
View file

@ -19,6 +19,7 @@
LOG_MODULE_REGISTER(dac_stm32); LOG_MODULE_REGISTER(dac_stm32);
#include <drivers/clock_control/stm32_clock_control.h> #include <drivers/clock_control/stm32_clock_control.h>
#include <pinmux/stm32/pinmux_stm32.h>
/* some low-end MCUs have DAC with only one channel */ /* some low-end MCUs have DAC with only one channel */
#ifdef LL_DAC_CHANNEL_2 #ifdef LL_DAC_CHANNEL_2
@ -40,8 +41,14 @@ static const uint32_t table_channels[] = {
/* Read-only driver configuration */ /* Read-only driver configuration */
struct dac_stm32_cfg { struct dac_stm32_cfg {
/* DAC instance. */
DAC_TypeDef *base; DAC_TypeDef *base;
/* Clock configuration. */
struct stm32_pclken pclken; struct stm32_pclken pclken;
/* pinctrl configurations. */
const struct soc_gpio_pinctrl *pinctrl;
/* Number of pinctrl configurations. */
size_t pinctrl_len;
}; };
/* Runtime driver data */ /* Runtime driver data */
@ -120,6 +127,11 @@ static int dac_stm32_init(const struct device *dev)
return -EIO; return -EIO;
} }
/* configure pinmux */
if (cfg->pinctrl_len != 0U) {
stm32_dt_pinctrl_configure(cfg->pinctrl, cfg->pinctrl_len);
}
return 0; return 0;
} }
@ -131,13 +143,19 @@ static const struct dac_driver_api api_stm32_driver_api = {
#define STM32_DAC_INIT(index) \ #define STM32_DAC_INIT(index) \
\ \
static const struct soc_gpio_pinctrl dac_pins_##index[] = \
ST_STM32_DT_INST_PINCTRL(index, 0); \
\
static const struct dac_stm32_cfg dac_stm32_cfg_##index = { \ static const struct dac_stm32_cfg dac_stm32_cfg_##index = { \
.base = (DAC_TypeDef *)DT_INST_REG_ADDR(index), \ .base = (DAC_TypeDef *)DT_INST_REG_ADDR(index), \
.pclken = { \ .pclken = { \
.enr = DT_INST_CLOCKS_CELL(index, bits), \ .enr = DT_INST_CLOCKS_CELL(index, bits), \
.bus = DT_INST_CLOCKS_CELL(index, bus), \ .bus = DT_INST_CLOCKS_CELL(index, bus), \
}, \ }, \
.pinctrl = dac_pins_##index, \
.pinctrl_len = ARRAY_SIZE(dac_pins_##index), \
}; \ }; \
\
static struct dac_stm32_data dac_stm32_data_##index = { \ static struct dac_stm32_data dac_stm32_data_##index = { \
.channel_count = STM32_CHANNEL_COUNT \ .channel_count = STM32_CHANNEL_COUNT \
}; \ }; \

9
dts/bindings/dac/st,stm32-dac.yaml
View file

@ -14,6 +14,15 @@ properties:
clocks: clocks:
required: true required: true
pinctrl-0:
type: phandles
required: false
description: |
GPIO pin configuration for DAC output. The phandles are
expected to reference pinctrl nodes, e.g.
pinctrl-0 = <&dac_out1_pa4 &dac_out2_pa5>;
"#io-channel-cells": "#io-channel-cells":
const: 1 const: 1