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authorSean Wang <sean.wang@mediatek.com>2018-09-08 14:07:25 +0300
committerLinus Walleij <linus.walleij@linaro.org>2018-09-19 00:52:57 +0300
commit0d7ca772148fe89149426bde59aaedcb3081d92d (patch)
treeb970b1b56dbf44da2bafa5a11becaaa1981d3173 /drivers/pinctrl
parent85430152ba468acbfc2d7bc81c57bb2f93a24641 (diff)
downloadlinux-0d7ca772148fe89149426bde59aaedcb3081d92d.tar.xz
pinctrl: mediatek: add advanced pull related support to pinctrl-mtk-common-v2.c
There are some specific pins (i.e. MMC/SD) need specific registers to turn on/off the 10K & 50k(75K) resistors when pull up/down. Therefore, this patch adds the custom prarmeters so that the user could control it through device tree. Signed-off-by: Ryder.Lee <ryder.lee@mediatek.com> Signed-off-by: Sean Wang <sean.wang@mediatek.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/pinctrl')
-rw-r--r--drivers/pinctrl/mediatek/pinctrl-moore.c33
-rw-r--r--drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c55
-rw-r--r--drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.h17
3 files changed, 105 insertions, 0 deletions
diff --git a/drivers/pinctrl/mediatek/pinctrl-moore.c b/drivers/pinctrl/mediatek/pinctrl-moore.c
index d69f024c416d..400932959727 100644
--- a/drivers/pinctrl/mediatek/pinctrl-moore.c
+++ b/drivers/pinctrl/mediatek/pinctrl-moore.c
@@ -15,16 +15,22 @@
/* Custom pinconf parameters */
#define MTK_PIN_CONFIG_TDSEL (PIN_CONFIG_END + 1)
#define MTK_PIN_CONFIG_RDSEL (PIN_CONFIG_END + 2)
+#define MTK_PIN_CONFIG_PU_ADV (PIN_CONFIG_END + 3)
+#define MTK_PIN_CONFIG_PD_ADV (PIN_CONFIG_END + 4)
static const struct pinconf_generic_params mtk_custom_bindings[] = {
{"mediatek,tdsel", MTK_PIN_CONFIG_TDSEL, 0},
{"mediatek,rdsel", MTK_PIN_CONFIG_RDSEL, 0},
+ {"mediatek,pull-up-adv", MTK_PIN_CONFIG_PU_ADV, 1},
+ {"mediatek,pull-down-adv", MTK_PIN_CONFIG_PD_ADV, 1},
};
#ifdef CONFIG_DEBUG_FS
static const struct pin_config_item mtk_conf_items[] = {
PCONFDUMP(MTK_PIN_CONFIG_TDSEL, "tdsel", NULL, true),
PCONFDUMP(MTK_PIN_CONFIG_RDSEL, "rdsel", NULL, true),
+ PCONFDUMP(MTK_PIN_CONFIG_PU_ADV, "pu-adv", NULL, true),
+ PCONFDUMP(MTK_PIN_CONFIG_PD_ADV, "pd-adv", NULL, true),
};
#endif
@@ -169,6 +175,19 @@ static int mtk_pinconf_get(struct pinctrl_dev *pctldev,
ret = val;
break;
+ case MTK_PIN_CONFIG_PU_ADV:
+ case MTK_PIN_CONFIG_PD_ADV:
+ if (hw->soc->adv_pull_get) {
+ bool pullup;
+
+ pullup = param == MTK_PIN_CONFIG_PU_ADV;
+ err = hw->soc->adv_pull_get(hw, desc, pullup, &ret);
+ if (err)
+ return err;
+ } else {
+ return -ENOTSUPP;
+ }
+ break;
default:
return -ENOTSUPP;
}
@@ -282,6 +301,20 @@ static int mtk_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin,
if (err)
goto err;
break;
+ case MTK_PIN_CONFIG_PU_ADV:
+ case MTK_PIN_CONFIG_PD_ADV:
+ if (hw->soc->adv_pull_set) {
+ bool pullup;
+
+ pullup = param == MTK_PIN_CONFIG_PU_ADV;
+ err = hw->soc->adv_pull_set(hw, desc, pullup,
+ arg);
+ if (err)
+ return err;
+ } else {
+ return -ENOTSUPP;
+ }
+ break;
default:
err = -ENOTSUPP;
}
diff --git a/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c b/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c
index 67c95ef85ba9..e66bf49a8c4c 100644
--- a/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c
+++ b/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c
@@ -358,3 +358,58 @@ int mtk_pinconf_drive_get_rev1(struct mtk_pinctrl *hw,
return 0;
}
+
+int mtk_pinconf_adv_pull_set(struct mtk_pinctrl *hw,
+ const struct mtk_pin_desc *desc, bool pullup,
+ u32 arg)
+{
+ int err;
+
+ /* 10K off & 50K (75K) off, when (R0, R1) = (0, 0);
+ * 10K off & 50K (75K) on, when (R0, R1) = (0, 1);
+ * 10K on & 50K (75K) off, when (R0, R1) = (1, 0);
+ * 10K on & 50K (75K) on, when (R0, R1) = (1, 1)
+ */
+ err = mtk_hw_set_value(hw, desc->number, PINCTRL_PIN_REG_R0, arg & 1);
+ if (err)
+ return 0;
+
+ err = mtk_hw_set_value(hw, desc->number, PINCTRL_PIN_REG_R1,
+ !!(arg & 2));
+ if (err)
+ return 0;
+
+ arg = pullup ? 0 : 1;
+
+ err = mtk_hw_set_value(hw, desc->number, PINCTRL_PIN_REG_PUPD, arg);
+
+ return err;
+}
+
+int mtk_pinconf_adv_pull_get(struct mtk_pinctrl *hw,
+ const struct mtk_pin_desc *desc, bool pullup,
+ u32 *val)
+{
+ u32 t, t2;
+ int err;
+
+ err = mtk_hw_get_value(hw, desc->number, PINCTRL_PIN_REG_PUPD, &t);
+ if (err)
+ return err;
+
+ /* t == 0 supposes PULLUP for the customized PULL setup */
+ if (pullup ^ !t)
+ return -EINVAL;
+
+ err = mtk_hw_get_value(hw, desc->number, PINCTRL_PIN_REG_R0, &t);
+ if (err)
+ return err;
+
+ err = mtk_hw_get_value(hw, desc->number, PINCTRL_PIN_REG_R1, &t2);
+ if (err)
+ return err;
+
+ *val = (t | t2 << 1) & 0x7;
+
+ return 0;
+}
diff --git a/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.h b/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.h
index 3a55ef70e01b..ce364a1a28a6 100644
--- a/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.h
+++ b/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.h
@@ -51,6 +51,9 @@ enum {
PINCTRL_PIN_REG_TDSEL,
PINCTRL_PIN_REG_RDSEL,
PINCTRL_PIN_REG_DRV,
+ PINCTRL_PIN_REG_PUPD,
+ PINCTRL_PIN_REG_R0,
+ PINCTRL_PIN_REG_R1,
PINCTRL_PIN_REG_MAX,
};
@@ -163,6 +166,13 @@ struct mtk_pin_soc {
const struct mtk_pin_desc *desc, u32 arg);
int (*drive_get)(struct mtk_pinctrl *hw,
const struct mtk_pin_desc *desc, int *val);
+
+ int (*adv_pull_set)(struct mtk_pinctrl *hw,
+ const struct mtk_pin_desc *desc, bool pullup,
+ u32 arg);
+ int (*adv_pull_get)(struct mtk_pinctrl *hw,
+ const struct mtk_pin_desc *desc, bool pullup,
+ u32 *val);
};
struct mtk_pinctrl {
@@ -199,4 +209,11 @@ int mtk_pinconf_drive_set_rev1(struct mtk_pinctrl *hw,
int mtk_pinconf_drive_get_rev1(struct mtk_pinctrl *hw,
const struct mtk_pin_desc *desc, int *val);
+int mtk_pinconf_adv_pull_set(struct mtk_pinctrl *hw,
+ const struct mtk_pin_desc *desc, bool pullup,
+ u32 arg);
+int mtk_pinconf_adv_pull_get(struct mtk_pinctrl *hw,
+ const struct mtk_pin_desc *desc, bool pullup,
+ u32 *val);
+
#endif /* __PINCTRL_MTK_COMMON_V2_H */