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sunxi: axp: Add driver-model support to the axp_gpio code

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Add driver-model support to the axp_gpio code, note that this needs a small
tweak to the driver-model version of sunxi_name_to_gpio to deal with the
vbus detect and enable pins which are not standard numbered gpios.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
This commit is contained in:
Hans de Goede 2015-04-22 11:31:22 +02:00
parent 2fcf033d36
commit f9b7a04bc8
3 changed files with 56 additions and 2 deletions
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6
arch/arm/include/asm/arch-sunxi/gpio.h
View File

@ -203,8 +203,10 @@ enum sunxi_gpio_number {
#define SUNXI_GPIO_PULL_DOWN 2
/* Virtual AXP0 GPIOs */
#define SUNXI_GPIO_AXP0_VBUS_DETECT 8
#define SUNXI_GPIO_AXP0_VBUS_ENABLE 9
#define SUNXI_GPIO_AXP0_PREFIX "AXP0-"
#define SUNXI_GPIO_AXP0_VBUS_DETECT 4
#define SUNXI_GPIO_AXP0_VBUS_ENABLE 5
#define SUNXI_GPIO_AXP0_GPIO_COUNT 6
void sunxi_gpio_set_cfgbank(struct sunxi_gpio *pio, int bank_offset, u32 val);
void sunxi_gpio_set_cfgpin(u32 pin, u32 val);

40
drivers/gpio/axp_gpio.c
View File

@ -9,6 +9,11 @@
#include <common.h>
#include <asm/arch/gpio.h>
#include <asm/arch/pmic_bus.h>
#include <asm/gpio.h>
#include <dm.h>
#include <dm/device-internal.h>
#include <dm/lists.h>
#include <dm/root.h>
#include <errno.h>
#ifdef CONFIG_AXP152_POWER
@ -135,13 +140,48 @@ int axp_gpio_set_value(struct udevice *dev, unsigned pin, int val)
}
}
#ifdef CONFIG_DM_GPIO
static const struct dm_gpio_ops gpio_axp_ops = {
.direction_input = axp_gpio_direction_input,
.direction_output = axp_gpio_direction_output,
.get_value = axp_gpio_get_value,
.set_value = axp_gpio_set_value,
};
static int gpio_axp_probe(struct udevice *dev)
{
struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
/* Tell the uclass how many GPIOs we have */
uc_priv->bank_name = strdup(SUNXI_GPIO_AXP0_PREFIX);
uc_priv->gpio_count = SUNXI_GPIO_AXP0_GPIO_COUNT;
return 0;
}
U_BOOT_DRIVER(gpio_axp) = {
.name = "gpio_axp",
.id = UCLASS_GPIO,
.ops = &gpio_axp_ops,
.probe = gpio_axp_probe,
};
#endif
int axp_gpio_init(void)
{
__maybe_unused struct udevice *dev;
int ret;
ret = pmic_bus_init();
if (ret)
return ret;
#ifdef CONFIG_DM_GPIO
/* There is no devicetree support for the axp yet, so bind directly */
ret = device_bind_driver(dm_root(), "gpio_axp", "AXP-gpio", &dev);
if (ret)
return ret;
#endif
return 0;
}

12
drivers/gpio/sunxi_gpio.c
View File

@ -172,7 +172,19 @@ int sunxi_name_to_gpio(const char *name)
{
unsigned int gpio;
int ret;
#if !defined CONFIG_SPL_BUILD && defined CONFIG_AXP_GPIO
char lookup[8];
if (strcasecmp(name, "AXP0-VBUS-DETECT") == 0) {
sprintf(lookup, SUNXI_GPIO_AXP0_PREFIX "%d",
SUNXI_GPIO_AXP0_VBUS_DETECT);
name = lookup;
} else if (strcasecmp(name, "AXP0-VBUS-ENABLE") == 0) {
sprintf(lookup, SUNXI_GPIO_AXP0_PREFIX "%d",
SUNXI_GPIO_AXP0_VBUS_ENABLE);
name = lookup;
}
#endif
ret = gpio_lookup_name(name, NULL, NULL, &gpio);
return ret ? ret : gpio;