pinctrl: mediatek: add support for different types of IO pins
There are many pins in an SoC, and register usage may vary by pins.
This patch introduces a concept of "io type" and "io type group"
to mediatek pinctrl drivers. This can provide different pinconf
handlers implementation (eg: "bias-pull-up/down", "driving" and
"input-enable") for IO pins that belong to different types.
diff --git a/drivers/pinctrl/mediatek/pinctrl-mtk-common.h b/drivers/pinctrl/mediatek/pinctrl-mtk-common.h
index 91a8c05..0d9596f 100644
--- a/drivers/pinctrl/mediatek/pinctrl-mtk-common.h
+++ b/drivers/pinctrl/mediatek/pinctrl-mtk-common.h
@@ -12,10 +12,15 @@
#define MAX_BASE_CALC 10
#define MTK_RANGE(_a) { .range = (_a), .nranges = ARRAY_SIZE(_a), }
-#define MTK_PIN(_number, _name, _drv_n) { \
+
+#define MTK_PIN(_number, _name, _drv_n) \
+ MTK_TYPED_PIN(_number, _name, _drv_n, IO_TYPE_DEFAULT)
+
+#define MTK_TYPED_PIN(_number, _name, _drv_n, _io_n) { \
.number = _number, \
.name = _name, \
.drv_n = _drv_n, \
+ .io_n = _io_n, \
}
#define PINCTRL_PIN_GROUP(name, id) \
@@ -75,6 +80,18 @@
DRV_GRP4,
};
+/* Group the pins by the io type */
+enum {
+ IO_TYPE_DEFAULT,
+ IO_TYPE_GRP0,
+ IO_TYPE_GRP1,
+ IO_TYPE_GRP2,
+ IO_TYPE_GRP3,
+ IO_TYPE_GRP4,
+ IO_TYPE_GRP5,
+ IO_TYPE_GRP6,
+};
+
/**
* struct mtk_pin_field - the structure that holds the information of the field
* used to describe the attribute for the pin
@@ -139,11 +156,13 @@
* @number: unique pin number from the global pin number space
* @name: name for this pin
* @drv_n: the index with the driving group
+ * @io_n: the index with the io type
*/
struct mtk_pin_desc {
unsigned int number;
const char *name;
u8 drv_n;
+ u8 io_n;
};
/**
@@ -172,6 +191,21 @@
int num_group_names;
};
+/**
+ * struct mtk_io_type_desc - io class descriptor for specific pins
+ * @name: name of the io class
+ */
+struct mtk_io_type_desc {
+ const char *name;
+#if CONFIG_IS_ENABLED(PINCONF)
+ /* Specific pinconfig operations */
+ int (*bias_set)(struct udevice *dev, u32 pin, bool disable,
+ bool pullup, u32 val);
+ int (*drive_set)(struct udevice *dev, u32 pin, u32 arg);
+ int (*input_enable)(struct udevice *dev, u32 pin, u32 arg);
+#endif
+};
+
/* struct mtk_pin_soc - the structure that holds SoC-specific data */
struct mtk_pinctrl_soc {
const char *name;
@@ -182,6 +216,8 @@
int ngrps;
const struct mtk_function_desc *funcs;
int nfuncs;
+ const struct mtk_io_type_desc *io_type;
+ u8 ntype;
int gpio_mode;
const char * const *base_names;
unsigned int nbase_names;