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author | Ahmad Fatoum <a.fatoum@pengutronix.de> | 2019-09-26 11:35:24 +0200 |
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committer | Sascha Hauer <s.hauer@pengutronix.de> | 2019-10-14 15:26:19 +0200 |
commit | 621032149f2b668b4303a907f931af80c644ffd2 (patch) | |
tree | 49a15bd3eb2f3699701212d4d5cb776d8bed2eff /arch | |
parent | ea13321caf5597b7f07352ddba88c86999530de8 (diff) | |
download | barebox-621032149f2b668b4303a907f931af80c644ffd2.tar.gz barebox-621032149f2b668b4303a907f931af80c644ffd2.tar.xz |
ARM: at91: provide at91_mux_pio3_pin for use in first stage
Low level init code may wish the ability to configure pins, e.g. for low
level debug UART. The pinctrl-at91 driver already exports an
at91_mux_pio3_pin function, but that one is only usable after driver
probe. Instead, provide an at91_mux_pio3_pin function, which can be used
at all times.
Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'arch')
-rw-r--r-- | arch/arm/mach-at91/include/mach/gpio.h | 39 | ||||
-rw-r--r-- | arch/arm/mach-at91/include/mach/iomux.h | 9 |
2 files changed, 40 insertions, 8 deletions
diff --git a/arch/arm/mach-at91/include/mach/gpio.h b/arch/arm/mach-at91/include/mach/gpio.h index f5ab47c064..b893dc220c 100644 --- a/arch/arm/mach-at91/include/mach/gpio.h +++ b/arch/arm/mach-at91/include/mach/gpio.h @@ -7,8 +7,18 @@ #ifndef __AT91_GPIO_H__ #define __AT91_GPIO_H__ +#include <dt-bindings/gpio/gpio.h> + #define MAX_NB_GPIO_PER_BANK 32 +enum at91_mux { + AT91_MUX_GPIO = 0, + AT91_MUX_PERIPH_A = 1, + AT91_MUX_PERIPH_B = 2, + AT91_MUX_PERIPH_C = 3, + AT91_MUX_PERIPH_D = 4, +}; + static inline unsigned pin_to_bank(unsigned pin) { return pin / MAX_NB_GPIO_PER_BANK; @@ -136,4 +146,33 @@ static inline int at91_mux_gpio_get(void __iomem *pio, unsigned mask) return (pdsr & mask) != 0; } +static inline void at91_mux_pio3_pin(void __iomem *pio, unsigned mask, + enum at91_mux mux, int gpio_state) +{ + at91_mux_disable_interrupt(pio, mask); + + switch(mux) { + case AT91_MUX_GPIO: + at91_mux_gpio_enable(pio, mask); + break; + case AT91_MUX_PERIPH_A: + at91_mux_pio3_set_A_periph(pio, mask); + break; + case AT91_MUX_PERIPH_B: + at91_mux_pio3_set_B_periph(pio, mask); + break; + case AT91_MUX_PERIPH_C: + at91_mux_pio3_set_C_periph(pio, mask); + break; + case AT91_MUX_PERIPH_D: + at91_mux_pio3_set_D_periph(pio, mask); + break; + } + if (mux != AT91_MUX_GPIO) + at91_mux_gpio_disable(pio, mask); + + at91_mux_set_pullup(pio, mask, gpio_state & GPIO_PULL_UP); + at91_mux_pio3_set_pulldown(pio, mask, gpio_state & GPIO_PULL_DOWN); +} + #endif /* __AT91_GPIO_H__ */ diff --git a/arch/arm/mach-at91/include/mach/iomux.h b/arch/arm/mach-at91/include/mach/iomux.h index bac7ef65a2..0c91b22a8f 100644 --- a/arch/arm/mach-at91/include/mach/iomux.h +++ b/arch/arm/mach-at91/include/mach/iomux.h @@ -17,6 +17,7 @@ #include <asm-generic/errno.h> #include <mach/at91_pio.h> #include <mach/hardware.h> +#include <mach/gpio.h> #define AT91_PIN_PA0 (0x00 + 0) #define AT91_PIN_PA1 (0x00 + 1) @@ -183,14 +184,6 @@ #define AT91_PIN_PE30 (0x80 + 30) #define AT91_PIN_PE31 (0x80 + 31) -enum at91_mux { - AT91_MUX_GPIO = 0, - AT91_MUX_PERIPH_A = 1, - AT91_MUX_PERIPH_B = 2, - AT91_MUX_PERIPH_C = 3, - AT91_MUX_PERIPH_D = 4, -}; - /* * mux the pin */ |