Implement drive strength support, by preserving the same bindings as in Linux.
Signed-off-by: Eugen Hristev eugen.hristev@microchip.com --- arch/arm/mach-at91/include/mach/atmel_pio4.h | 1 + drivers/pinctrl/pinctrl-at91-pio4.c | 8 ++++++++ include/dt-bindings/pinctrl/at91.h | 4 ++++ 3 files changed, 13 insertions(+)
diff --git a/arch/arm/mach-at91/include/mach/atmel_pio4.h b/arch/arm/mach-at91/include/mach/atmel_pio4.h index f348b05bc8..35ac7b2d40 100644 --- a/arch/arm/mach-at91/include/mach/atmel_pio4.h +++ b/arch/arm/mach-at91/include/mach/atmel_pio4.h @@ -52,6 +52,7 @@ struct atmel_pio4_port { #define ATMEL_PIO_DRVSTR_LO (1 << 16) #define ATMEL_PIO_DRVSTR_ME (2 << 16) #define ATMEL_PIO_DRVSTR_HI (3 << 16) +#define ATMEL_PIO_DRVSTR_OFFSET 16 #define ATMEL_PIO_CFGR_EVTSEL_MASK GENMASK(26, 24) #define ATMEL_PIO_CFGR_EVTSEL_FALLING (0 << 24) #define ATMEL_PIO_CFGR_EVTSEL_RISING (1 << 24) diff --git a/drivers/pinctrl/pinctrl-at91-pio4.c b/drivers/pinctrl/pinctrl-at91-pio4.c index 58f4d8cb39..350ea0a1f3 100644 --- a/drivers/pinctrl/pinctrl-at91-pio4.c +++ b/drivers/pinctrl/pinctrl-at91-pio4.c @@ -34,6 +34,7 @@ static const struct pinconf_param conf_params[] = { { "input-schmitt-disable", PIN_CONFIG_INPUT_SCHMITT_ENABLE, 0 }, { "input-schmitt-enable", PIN_CONFIG_INPUT_SCHMITT_ENABLE, 1 }, { "input-debounce", PIN_CONFIG_INPUT_DEBOUNCE, 0 }, + { "atmel,drive-strength", PIN_CONFIG_DRIVE_STRENGTH, 0 }, };
static u32 atmel_pinctrl_get_pinconf(struct udevice *config) @@ -41,6 +42,7 @@ static u32 atmel_pinctrl_get_pinconf(struct udevice *config) const struct pinconf_param *params; u32 param, arg, conf = 0; u32 i; + u32 val;
for (i = 0; i < ARRAY_SIZE(conf_params); i++) { params = &conf_params[i]; @@ -82,6 +84,12 @@ static u32 atmel_pinctrl_get_pinconf(struct udevice *config) conf |= ATMEL_PIO_IFSCEN_MASK; } break; + case PIN_CONFIG_DRIVE_STRENGTH: + dev_read_u32(config, params->property, &val); + conf &= (~ATMEL_PIO_DRVSTR_MASK); + conf |= (val << ATMEL_PIO_DRVSTR_OFFSET) + & ATMEL_PIO_DRVSTR_MASK; + break; default: printf("%s: Unsupported configuration parameter: %u\n", __func__, param); diff --git a/include/dt-bindings/pinctrl/at91.h b/include/dt-bindings/pinctrl/at91.h index 5afb1863c3..3831f91fb3 100644 --- a/include/dt-bindings/pinctrl/at91.h +++ b/include/dt-bindings/pinctrl/at91.h @@ -42,4 +42,8 @@ #define AT91_PERIPH_C 3 #define AT91_PERIPH_D 4
+#define ATMEL_PIO_DRVSTR_LO 1 +#define ATMEL_PIO_DRVSTR_ME 2 +#define ATMEL_PIO_DRVSTR_HI 3 + #endif /* __DT_BINDINGS_AT91_PINCTRL_H__ */