@@ -82,6 +82,9 @@ static int mtk_pinconf_get(struct pinctrl_dev *pctldev,
struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev);
u32 param = pinconf_to_config_param(*config);
int val, val2, err, reg, ret = 1;
+ const struct mtk_pin_desc *desc;
+
+ desc = (const struct mtk_pin_desc *)&hw->soc->pins[pin];
switch (param) {
case PIN_CONFIG_BIAS_DISABLE:
@@ -139,19 +142,13 @@ static int mtk_pinconf_get(struct pinctrl_dev *pctldev,
break;
case PIN_CONFIG_DRIVE_STRENGTH:
- err = mtk_hw_get_value(hw, pin, PINCTRL_PIN_REG_E4, &val);
- if (err)
- return err;
-
- err = mtk_hw_get_value(hw, pin, PINCTRL_PIN_REG_E8, &val2);
- if (err)
- return err;
-
- /* 4mA when (e8, e4) = (0, 0); 8mA when (e8, e4) = (0, 1)
- * 12mA when (e8, e4) = (1, 0); 16mA when (e8, e4) = (1, 1)
- */
- ret = ((val2 << 1) + val + 1) * 4;
-
+ if (hw->soc->drive_get) {
+ err = hw->soc->drive_get(hw, desc, &ret);
+ if (err)
+ return err;
+ } else {
+ err = -ENOTSUPP;
+ }
break;
case MTK_PIN_CONFIG_TDSEL:
case MTK_PIN_CONFIG_RDSEL:
@@ -178,9 +175,12 @@ static int mtk_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin,
unsigned long *configs, unsigned int num_configs)
{
struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev);
+ const struct mtk_pin_desc *desc;
u32 reg, param, arg;
int cfg, err = 0;
+ desc = (const struct mtk_pin_desc *)&hw->soc->pins[pin];
+
for (cfg = 0; cfg < num_configs; cfg++) {
param = pinconf_to_config_param(configs[cfg]);
arg = pinconf_to_config_argument(configs[cfg]);
@@ -247,24 +247,10 @@ static int mtk_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin,
goto err;
break;
case PIN_CONFIG_DRIVE_STRENGTH:
- /* 4mA when (e8, e4) = (0, 0);
- * 8mA when (e8, e4) = (0, 1);
- * 12mA when (e8, e4) = (1, 0);
- * 16mA when (e8, e4) = (1, 1)
- */
- if (!(arg % 4) && (arg >= 4 && arg <= 16)) {
- arg = arg / 4 - 1;
- err = mtk_hw_set_value(hw, pin,
- PINCTRL_PIN_REG_E4,
- arg & 0x1);
- if (err)
- goto err;
-
- err = mtk_hw_set_value(hw, pin,
- PINCTRL_PIN_REG_E8,
- (arg & 0x2) >> 1);
- if (err)
- goto err;
+ if (hw->soc->drive_set) {
+ err = hw->soc->drive_set(hw, desc, arg);
+ if (err)
+ return err;
} else {
err = -ENOTSUPP;
}
@@ -767,6 +767,8 @@ static const struct mtk_pin_soc mt7622_data = {
.eint_hw = &mt7622_eint_hw,
.gpio_m = 1,
.eint_m = 1,
+ .drive_set = mtk_pinconf_drive_set,
+ .drive_get = mtk_pinconf_drive_get,
};
static const struct of_device_id mt7622_pinctrl_of_match[] = {
@@ -13,6 +13,32 @@
#include "pinctrl-mtk-common-v2.h"
+/**
+ * struct mtk_drive_desc - the structure that holds the information
+ * of the driving current
+ * @min: the minimum current of this group
+ * @max: the maximum current of this group
+ * @step: the step current of this group
+ * @scal: the weight factor
+ *
+ * formula: output = ((input) / step - 1) * scal
+ */
+struct mtk_drive_desc {
+ u8 min;
+ u8 max;
+ u8 step;
+ u8 scal;
+};
+
+/* The groups of drive strength */
+const struct mtk_drive_desc mtk_drive[] = {
+ [DRV_GRP0] = { 4, 16, 4, 1 },
+ [DRV_GRP1] = { 4, 16, 4, 2 },
+ [DRV_GRP2] = { 2, 8, 2, 1 },
+ [DRV_GRP3] = { 2, 8, 2, 2 },
+ [DRV_GRP4] = { 2, 16, 2, 1 },
+};
+
static void mtk_w32(struct mtk_pinctrl *pctl, u32 reg, u32 val)
{
writel_relaxed(val, pctl->base + reg);
@@ -163,3 +189,56 @@ int mtk_hw_get_value(struct mtk_pinctrl *hw, int pin, int field, int *value)
return 0;
}
+
+/* Revision 0 */
+int mtk_pinconf_drive_set(struct mtk_pinctrl *hw,
+ const struct mtk_pin_desc *desc, u32 arg)
+{
+ const struct mtk_drive_desc *tb;
+ int err = -ENOTSUPP;
+
+ tb = &mtk_drive[desc->drv_n];
+ /* 4mA when (e8, e4) = (0, 0)
+ * 8mA when (e8, e4) = (0, 1)
+ * 12mA when (e8, e4) = (1, 0)
+ * 16mA when (e8, e4) = (1, 1)
+ */
+ if ((arg >= tb->min && arg <= tb->max) && !(arg % tb->step)) {
+ arg = (arg / tb->step - 1) * tb->scal;
+ err = mtk_hw_set_value(hw, desc->number, PINCTRL_PIN_REG_E4,
+ arg & 0x1);
+ if (err)
+ return err;
+
+ err = mtk_hw_set_value(hw, desc->number, PINCTRL_PIN_REG_E8,
+ (arg & 0x2) >> 1);
+ if (err)
+ return err;
+ }
+
+ return err;
+}
+
+int mtk_pinconf_drive_get(struct mtk_pinctrl *hw,
+ const struct mtk_pin_desc *desc, int *val)
+{
+ const struct mtk_drive_desc *tb;
+ int err, val1, val2;
+
+ tb = &mtk_drive[desc->drv_n];
+
+ err = mtk_hw_get_value(hw, desc->number, PINCTRL_PIN_REG_E4, &val1);
+ if (err)
+ return err;
+
+ err = mtk_hw_get_value(hw, desc->number, PINCTRL_PIN_REG_E8, &val2);
+ if (err)
+ return err;
+
+ /* 4mA when (e8, e4) = (0, 0); 8mA when (e8, e4) = (0, 1)
+ * 12mA when (e8, e4) = (1, 0); 16mA when (e8, e4) = (1, 1)
+ */
+ *val = (((val2 << 1) + val1) / tb->scal + 1) * tb->step;
+
+ return 0;
+}
@@ -50,6 +50,7 @@ enum {
PINCTRL_PIN_REG_E8,
PINCTRL_PIN_REG_TDSEL,
PINCTRL_PIN_REG_RDSEL,
+ PINCTRL_PIN_REG_DRV,
PINCTRL_PIN_REG_MAX,
};
@@ -130,6 +131,8 @@ struct mtk_pin_desc {
u8 drv_n;
};
+struct mtk_pinctrl;
+
/* struct mtk_pin_soc - the structure that holds SoC-specific data */
struct mtk_pin_soc {
const struct mtk_pin_reg_calc *reg_cal;
@@ -145,6 +148,12 @@ struct mtk_pin_soc {
/* Specific parameters per SoC */
u8 gpio_m;
u8 eint_m;
+
+ /* Specific pinconfig operations */
+ int (*drive_set)(struct mtk_pinctrl *hw,
+ const struct mtk_pin_desc *desc, u32 arg);
+ int (*drive_get)(struct mtk_pinctrl *hw,
+ const struct mtk_pin_desc *desc, int *val);
};
struct mtk_pinctrl {
@@ -161,4 +170,9 @@ void mtk_rmw(struct mtk_pinctrl *pctl, u32 reg, u32 mask, u32 set);
int mtk_hw_set_value(struct mtk_pinctrl *hw, int pin, int field, int value);
int mtk_hw_get_value(struct mtk_pinctrl *hw, int pin, int field, int *value);
+int mtk_pinconf_drive_set(struct mtk_pinctrl *hw,
+ const struct mtk_pin_desc *desc, u32 arg);
+int mtk_pinconf_drive_get(struct mtk_pinctrl *hw,
+ const struct mtk_pin_desc *desc, int *val);
+
#endif /* __PINCTRL_MTK_COMMON_V2_H */