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authorAhmad Fatoum <a.fatoum@pengutronix.de>2019-09-26 11:35:24 +0200
committerSascha Hauer <s.hauer@pengutronix.de>2019-10-14 15:26:19 +0200
commit621032149f2b668b4303a907f931af80c644ffd2 (patch)
tree49a15bd3eb2f3699701212d4d5cb776d8bed2eff /arch/arm/mach-at91
parentea13321caf5597b7f07352ddba88c86999530de8 (diff)
downloadbarebox-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/arm/mach-at91')
-rw-r--r--arch/arm/mach-at91/include/mach/gpio.h39
-rw-r--r--arch/arm/mach-at91/include/mach/iomux.h9
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
*/