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path: root/drivers/gpio/omap_gpio.c
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Diffstat (limited to 'drivers/gpio/omap_gpio.c')
-rw-r--r--drivers/gpio/omap_gpio.c107
1 files changed, 59 insertions, 48 deletions
diff --git a/drivers/gpio/omap_gpio.c b/drivers/gpio/omap_gpio.c
index 0a1e124..cd960dc 100644
--- a/drivers/gpio/omap_gpio.c
+++ b/drivers/gpio/omap_gpio.c
@@ -20,9 +20,13 @@
*/
#include <common.h>
#include <dm.h>
+#include <fdtdec.h>
#include <asm/gpio.h>
#include <asm/io.h>
#include <asm/errno.h>
+#include <malloc.h>
+
+DECLARE_GLOBAL_DATA_PTR;
#define OMAP_GPIO_DIR_OUT 0
#define OMAP_GPIO_DIR_IN 1
@@ -34,7 +38,6 @@
struct gpio_bank {
/* TODO(sjg@chromium.org): Can we use a struct here? */
void *base; /* address of registers in physical memory */
- enum gpio_method method;
};
#endif
@@ -55,13 +58,8 @@ static void _set_gpio_direction(const struct gpio_bank *bank, int gpio,
void *reg = bank->base;
u32 l;
- switch (bank->method) {
- case METHOD_GPIO_24XX:
- reg += OMAP_GPIO_OE;
- break;
- default:
- return;
- }
+ reg += OMAP_GPIO_OE;
+
l = __raw_readl(reg);
if (is_input)
l |= 1 << gpio;
@@ -79,13 +77,7 @@ static int _get_gpio_direction(const struct gpio_bank *bank, int gpio)
void *reg = bank->base;
u32 v;
- switch (bank->method) {
- case METHOD_GPIO_24XX:
- reg += OMAP_GPIO_OE;
- break;
- default:
- return -1;
- }
+ reg += OMAP_GPIO_OE;
v = __raw_readl(reg);
@@ -101,19 +93,12 @@ static void _set_gpio_dataout(const struct gpio_bank *bank, int gpio,
void *reg = bank->base;
u32 l = 0;
- switch (bank->method) {
- case METHOD_GPIO_24XX:
- if (enable)
- reg += OMAP_GPIO_SETDATAOUT;
- else
- reg += OMAP_GPIO_CLEARDATAOUT;
- l = 1 << gpio;
- break;
- default:
- printf("omap3-gpio unknown bank method %s %d\n",
- __FILE__, __LINE__);
- return;
- }
+ if (enable)
+ reg += OMAP_GPIO_SETDATAOUT;
+ else
+ reg += OMAP_GPIO_CLEARDATAOUT;
+
+ l = 1 << gpio;
__raw_writel(l, reg);
}
@@ -122,19 +107,13 @@ static int _get_gpio_value(const struct gpio_bank *bank, int gpio)
void *reg = bank->base;
int input;
- switch (bank->method) {
- case METHOD_GPIO_24XX:
- input = _get_gpio_direction(bank, gpio);
- switch (input) {
- case OMAP_GPIO_DIR_IN:
- reg += OMAP_GPIO_DATAIN;
- break;
- case OMAP_GPIO_DIR_OUT:
- reg += OMAP_GPIO_DATAOUT;
- break;
- default:
- return -1;
- }
+ input = _get_gpio_direction(bank, gpio);
+ switch (input) {
+ case OMAP_GPIO_DIR_IN:
+ reg += OMAP_GPIO_DATAIN;
+ break;
+ case OMAP_GPIO_DIR_OUT:
+ reg += OMAP_GPIO_DATAOUT;
break;
default:
return -1;
@@ -310,24 +289,56 @@ static int omap_gpio_probe(struct udevice *dev)
struct gpio_bank *bank = dev_get_priv(dev);
struct omap_gpio_platdata *plat = dev_get_platdata(dev);
struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
- char name[18], *str;
- sprintf(name, "GPIO%d_", plat->bank_index);
- str = strdup(name);
- if (!str)
- return -ENOMEM;
- uc_priv->bank_name = str;
+ uc_priv->bank_name = plat->port_name;
uc_priv->gpio_count = GPIO_PER_BANK;
bank->base = (void *)plat->base;
- bank->method = plat->method;
return 0;
}
+static int omap_gpio_bind(struct udevice *dev)
+{
+ struct omap_gpio_platdata *plat = dev->platdata;
+ fdt_addr_t base_addr;
+
+ if (plat)
+ return 0;
+
+ base_addr = dev_get_addr(dev);
+ if (base_addr == FDT_ADDR_T_NONE)
+ return -ENODEV;
+
+ /*
+ * TODO:
+ * When every board is converted to driver model and DT is
+ * supported, this can be done by auto-alloc feature, but
+ * not using calloc to alloc memory for platdata.
+ */
+ plat = calloc(1, sizeof(*plat));
+ if (!plat)
+ return -ENOMEM;
+
+ plat->base = base_addr;
+ plat->port_name = fdt_get_name(gd->fdt_blob, dev->of_offset, NULL);
+ dev->platdata = plat;
+
+ return 0;
+}
+
+static const struct udevice_id omap_gpio_ids[] = {
+ { .compatible = "ti,omap3-gpio" },
+ { .compatible = "ti,omap4-gpio" },
+ { .compatible = "ti,am4372-gpio" },
+ { }
+};
+
U_BOOT_DRIVER(gpio_omap) = {
.name = "gpio_omap",
.id = UCLASS_GPIO,
.ops = &gpio_omap_ops,
+ .of_match = omap_gpio_ids,
+ .bind = omap_gpio_bind,
.probe = omap_gpio_probe,
.priv_auto_alloc_size = sizeof(struct gpio_bank),
};