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introduce and use sunxi_gpio_setup_dt_pins()

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This commit is contained in:
Andre Przywara
2017-02-12 14:53:16 +00:00
committed by Icenowy Zheng
parent 320b9df023
commit 2f25199bf0
2 changed files with 63 additions and 0 deletions
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arch/arm/include/asm/arch-sunxi/gpio.h
+2
View File
@@ -243,5 +243,7 @@ static inline int axp_gpio_init(void) { return 0; }
#endif
int sunxi_gpio_parse_pin_name(const char *pin_name);
int sunxi_gpio_setup_dt_pins(const void * volatile fdt_blob, int node,
const char * mux_name, int mux_sel);
#endif /* _SUNXI_GPIO_H */
arch/arm/mach-sunxi/pinmux.c
+61
View File
@@ -9,6 +9,9 @@
#include <common.h>
#include <asm/io.h>
#include <asm/arch/gpio.h>
#include <fdtdec.h>
#include <fdt_support.h>
#include <dt-bindings/pinctrl/sun4i-a10.h>
void sunxi_gpio_set_cfgbank(struct sunxi_gpio *pio, int bank_offset, u32 val)
{
@@ -85,3 +88,61 @@ int sunxi_gpio_parse_pin_name(const char *pin_name)
return pin;
}
int sunxi_gpio_setup_dt_pins(const void * volatile fdt_blob, int node,
const char * mux_name, int mux_sel)
{
int drive, pull, pin, i;
const char *pin_name;
int offset;
offset = fdtdec_lookup_phandle(fdt_blob, node, "pinctrl-0");
if (offset < 0)
return offset;
drive = fdt_getprop_u32_default_node(fdt_blob, offset, 0,
"drive-strength", 0);
if (drive) {
if (drive <= 10)
drive = SUN4I_PINCTRL_10_MA;
else if (drive <= 20)
drive = SUN4I_PINCTRL_20_MA;
else if (drive <= 30)
drive = SUN4I_PINCTRL_30_MA;
else
drive = SUN4I_PINCTRL_40_MA;
} else {
drive = fdt_getprop_u32_default_node(fdt_blob, offset, 0,
"allwinner,drive", 4);
}
if (fdt_get_property(fdt_blob, offset, "bias-pull-up", NULL))
pull = SUN4I_PINCTRL_PULL_UP;
else if (fdt_get_property(fdt_blob, offset, "bias-disable", NULL))
pull = SUN4I_PINCTRL_NO_PULL;
else if (fdt_get_property(fdt_blob, offset, "bias-pull-down", NULL))
pull = SUN4I_PINCTRL_PULL_DOWN;
else
pull = fdt_getprop_u32_default_node(fdt_blob, offset, 0,
"allwinner,pull", 0);
for (i = 0; ; i++) {
pin_name = fdt_stringlist_get(fdt_blob, offset,
"allwinner,pins", i, NULL);
if (!pin_name) {
pin_name = fdt_stringlist_get(fdt_blob, offset,
"pins", i, NULL);
if (!pin_name)
break;
}
pin = sunxi_gpio_parse_pin_name(pin_name);
if (pin < 0)
continue;
sunxi_gpio_set_cfgpin(pin, mux_sel);
sunxi_gpio_set_drv(pin, drive);
sunxi_gpio_set_pull(pin, pull);
}
return i;
}