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authorLight Hsieh <light.hsieh@mediatek.com>2020-01-22 09:53:13 +0300
committerLinus Walleij <linus.walleij@linaro.org>2020-02-14 13:36:49 +0300
commitcafe19db7751269bf6b4dd2148cbfa9fbe91d651 (patch)
tree9b632cd255dbec00c613ae21877c420d1791af7c /drivers/pinctrl/mediatek
parent1bea6afbc84206cd939ae227cf81d6c824af6fd7 (diff)
downloadlinux-cafe19db7751269bf6b4dd2148cbfa9fbe91d651.tar.xz
pinctrl: mediatek: Backward compatible to previous Mediatek's bias-pull usage
Refine mtk_pinconf_set()/mtk_pinconf_get() for backward compatibility to previous MediaTek's bias-pull usage. In PINCTRL_MTK that use pinctrl-mtk-common.c, bias-pull setting for pins with 2 pull resistors can be specified as value for bias-pull-up and bias-pull-down. For example: bias-pull-up = <MTK_PUPD_SET_R1R0_00>; bias-pull-up = <MTK_PUPD_SET_R1R0_01>; bias-pull-up = <MTK_PUPD_SET_R1R0_10>; bias-pull-up = <MTK_PUPD_SET_R1R0_11>; bias-pull-down = <MTK_PUPD_SET_R1R0_00>; bias-pull-down = <MTK_PUPD_SET_R1R0_01>; bias-pull-down = <MTK_PUPD_SET_R1R0_10>; bias-pull-down = <MTK_PUPD_SET_R1R0_11>; On the other hand, PINCTRL_MTK_PARIS use customized properties "mediatek,pull-up-adv" and "mediatek,pull-down-adv" to specify bias-pull setting for pins with 2 pull resistors. This introduce in-compatibility in device tree and increase porting effort to MediaTek's customer that had already used PINCTRL_MTK version. Besides, if customers are not aware of this change and still write devicetree for PINCTRL_MTK version, they may encounter runtime failure with pinctrl and spent time to debug. This patch adds backward compatible to previous MediaTek's bias-pull usage so that Mediatek's customer need not use a new devicetree property name. The rationale is that: changing driver implementation had better leave interface unchanged. Signed-off-by: Light Hsieh <light.hsieh@mediatek.com> Link: https://lore.kernel.org/r/1579675994-7001-5-git-send-email-light.hsieh@mediatek.com Acked-by: Sean Wang <sean.wang@kernel.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/pinctrl/mediatek')
-rw-r--r--drivers/pinctrl/mediatek/pinctrl-mt6765.c6
-rw-r--r--drivers/pinctrl/mediatek/pinctrl-mt8183.c6
-rw-r--r--drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c221
-rw-r--r--drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.h11
-rw-r--r--drivers/pinctrl/mediatek/pinctrl-paris.c49
5 files changed, 265 insertions, 28 deletions
diff --git a/drivers/pinctrl/mediatek/pinctrl-mt6765.c b/drivers/pinctrl/mediatek/pinctrl-mt6765.c
index 7fae397fe27c..905dae8c3fd8 100644
--- a/drivers/pinctrl/mediatek/pinctrl-mt6765.c
+++ b/drivers/pinctrl/mediatek/pinctrl-mt6765.c
@@ -1072,10 +1072,8 @@ static const struct mtk_pin_soc mt6765_data = {
.gpio_m = 0,
.base_names = mt6765_pinctrl_register_base_names,
.nbase_names = ARRAY_SIZE(mt6765_pinctrl_register_base_names),
- .bias_disable_set = mtk_pinconf_bias_disable_set,
- .bias_disable_get = mtk_pinconf_bias_disable_get,
- .bias_set = mtk_pinconf_bias_set,
- .bias_get = mtk_pinconf_bias_get,
+ .bias_set_combo = mtk_pinconf_bias_set_combo,
+ .bias_get_combo = mtk_pinconf_bias_get_combo,
.drive_set = mtk_pinconf_drive_set_raw,
.drive_get = mtk_pinconf_drive_get_raw,
.adv_pull_get = mtk_pinconf_adv_pull_get,
diff --git a/drivers/pinctrl/mediatek/pinctrl-mt8183.c b/drivers/pinctrl/mediatek/pinctrl-mt8183.c
index 4eca81864a96..60318339b618 100644
--- a/drivers/pinctrl/mediatek/pinctrl-mt8183.c
+++ b/drivers/pinctrl/mediatek/pinctrl-mt8183.c
@@ -556,10 +556,8 @@ static const struct mtk_pin_soc mt8183_data = {
.gpio_m = 0,
.base_names = mt8183_pinctrl_register_base_names,
.nbase_names = ARRAY_SIZE(mt8183_pinctrl_register_base_names),
- .bias_disable_set = mtk_pinconf_bias_disable_set_rev1,
- .bias_disable_get = mtk_pinconf_bias_disable_get_rev1,
- .bias_set = mtk_pinconf_bias_set_rev1,
- .bias_get = mtk_pinconf_bias_get_rev1,
+ .bias_set_combo = mtk_pinconf_bias_set_combo,
+ .bias_get_combo = mtk_pinconf_bias_get_combo,
.drive_set = mtk_pinconf_drive_set_rev1,
.drive_get = mtk_pinconf_drive_get_rev1,
.adv_pull_get = mtk_pinconf_adv_pull_get,
diff --git a/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c b/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c
index 2247eae8eaf0..1da942548ff4 100644
--- a/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c
+++ b/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c
@@ -6,6 +6,7 @@
*
*/
+#include <dt-bindings/pinctrl/mt65xx.h>
#include <linux/device.h>
#include <linux/err.h>
#include <linux/gpio/driver.h>
@@ -517,6 +518,226 @@ int mtk_pinconf_bias_get_rev1(struct mtk_pinctrl *hw,
return 0;
}
+/* Combo for the following pull register type:
+ * 1. PU + PD
+ * 2. PULLSEL + PULLEN
+ * 3. PUPD + R0 + R1
+ */
+static int mtk_pinconf_bias_set_pu_pd(struct mtk_pinctrl *hw,
+ const struct mtk_pin_desc *desc,
+ u32 pullup, u32 arg)
+{
+ int err, pu, pd;
+
+ if (arg == MTK_DISABLE) {
+ pu = 0;
+ pd = 0;
+ } else if ((arg == MTK_ENABLE) && pullup) {
+ pu = 1;
+ pd = 0;
+ } else if ((arg == MTK_ENABLE) && !pullup) {
+ pu = 0;
+ pd = 1;
+ } else {
+ err = -EINVAL;
+ goto out;
+ }
+
+ err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_PU, pu);
+ if (err)
+ goto out;
+
+ err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_PD, pd);
+
+out:
+ return err;
+}
+
+static int mtk_pinconf_bias_set_pullsel_pullen(struct mtk_pinctrl *hw,
+ const struct mtk_pin_desc *desc,
+ u32 pullup, u32 arg)
+{
+ int err, enable;
+
+ if (arg == MTK_DISABLE)
+ enable = 0;
+ else if (arg == MTK_ENABLE)
+ enable = 1;
+ else {
+ err = -EINVAL;
+ goto out;
+ }
+
+ err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_PULLEN, enable);
+ if (err)
+ goto out;
+
+ err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_PULLSEL, pullup);
+
+out:
+ return err;
+}
+
+static int mtk_pinconf_bias_set_pupd_r1_r0(struct mtk_pinctrl *hw,
+ const struct mtk_pin_desc *desc,
+ u32 pullup, u32 arg)
+{
+ int err, r0, r1;
+
+ if ((arg == MTK_DISABLE) || (arg == MTK_PUPD_SET_R1R0_00)) {
+ pullup = 0;
+ r0 = 0;
+ r1 = 0;
+ } else if (arg == MTK_PUPD_SET_R1R0_01) {
+ r0 = 1;
+ r1 = 0;
+ } else if (arg == MTK_PUPD_SET_R1R0_10) {
+ r0 = 0;
+ r1 = 1;
+ } else if (arg == MTK_PUPD_SET_R1R0_11) {
+ r0 = 1;
+ r1 = 1;
+ } else {
+ err = -EINVAL;
+ goto out;
+ }
+
+ /* MTK HW PUPD bit: 1 for pull-down, 0 for pull-up */
+ err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_PUPD, !pullup);
+ if (err)
+ goto out;
+
+ err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_R0, r0);
+ if (err)
+ goto out;
+
+ err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_R1, r1);
+
+out:
+ return err;
+}
+
+static int mtk_pinconf_bias_get_pu_pd(struct mtk_pinctrl *hw,
+ const struct mtk_pin_desc *desc,
+ u32 *pullup, u32 *enable)
+{
+ int err, pu, pd;
+
+ err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_PU, &pu);
+ if (err)
+ goto out;
+
+ err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_PD, &pd);
+ if (err)
+ goto out;
+
+ if (pu == 0 && pd == 0) {
+ *pullup = 0;
+ *enable = MTK_DISABLE;
+ } else if (pu == 1 && pd == 0) {
+ *pullup = 1;
+ *enable = MTK_ENABLE;
+ } else if (pu == 0 && pd == 1) {
+ *pullup = 0;
+ *enable = MTK_ENABLE;
+ } else
+ err = -EINVAL;
+
+out:
+ return err;
+}
+
+static int mtk_pinconf_bias_get_pullsel_pullen(struct mtk_pinctrl *hw,
+ const struct mtk_pin_desc *desc,
+ u32 *pullup, u32 *enable)
+{
+ int err;
+
+ err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_PULLSEL, pullup);
+ if (err)
+ goto out;
+
+ err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_PULLEN, enable);
+
+out:
+ return err;
+}
+
+static int mtk_pinconf_bias_get_pupd_r1_r0(struct mtk_pinctrl *hw,
+ const struct mtk_pin_desc *desc,
+ u32 *pullup, u32 *enable)
+{
+ int err, r0, r1;
+
+ err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_PUPD, pullup);
+ if (err)
+ goto out;
+ /* MTK HW PUPD bit: 1 for pull-down, 0 for pull-up */
+ *pullup = !(*pullup);
+
+ err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_R0, &r0);
+ if (err)
+ goto out;
+
+ err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_R1, &r1);
+ if (err)
+ goto out;
+
+ if ((r1 == 0) && (r0 == 0))
+ *enable = MTK_PUPD_SET_R1R0_00;
+ else if ((r1 == 0) && (r0 == 1))
+ *enable = MTK_PUPD_SET_R1R0_01;
+ else if ((r1 == 1) && (r0 == 0))
+ *enable = MTK_PUPD_SET_R1R0_10;
+ else if ((r1 == 1) && (r0 == 1))
+ *enable = MTK_PUPD_SET_R1R0_11;
+ else
+ err = -EINVAL;
+
+out:
+ return err;
+}
+
+int mtk_pinconf_bias_set_combo(struct mtk_pinctrl *hw,
+ const struct mtk_pin_desc *desc,
+ u32 pullup, u32 arg)
+{
+ int err;
+
+ err = mtk_pinconf_bias_set_pu_pd(hw, desc, pullup, arg);
+ if (!err)
+ goto out;
+
+ err = mtk_pinconf_bias_set_pullsel_pullen(hw, desc, pullup, arg);
+ if (!err)
+ goto out;
+
+ err = mtk_pinconf_bias_set_pupd_r1_r0(hw, desc, pullup, arg);
+
+out:
+ return err;
+}
+
+int mtk_pinconf_bias_get_combo(struct mtk_pinctrl *hw,
+ const struct mtk_pin_desc *desc,
+ u32 *pullup, u32 *enable)
+{
+ int err;
+
+ err = mtk_pinconf_bias_get_pu_pd(hw, desc, pullup, enable);
+ if (!err)
+ goto out;
+
+ err = mtk_pinconf_bias_get_pullsel_pullen(hw, desc, pullup, enable);
+ if (!err)
+ goto out;
+
+ err = mtk_pinconf_bias_get_pupd_r1_r0(hw, desc, pullup, enable);
+
+out:
+ return err;
+}
+
/* Revision 0 */
int mtk_pinconf_drive_set(struct mtk_pinctrl *hw,
const struct mtk_pin_desc *desc, u32 arg)
diff --git a/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.h b/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.h
index 75d0e0712c03..27df08736396 100644
--- a/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.h
+++ b/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.h
@@ -216,6 +216,11 @@ struct mtk_pin_soc {
int (*bias_get)(struct mtk_pinctrl *hw,
const struct mtk_pin_desc *desc, bool pullup, int *res);
+ int (*bias_set_combo)(struct mtk_pinctrl *hw,
+ const struct mtk_pin_desc *desc, u32 pullup, u32 arg);
+ int (*bias_get_combo)(struct mtk_pinctrl *hw,
+ const struct mtk_pin_desc *desc, u32 *pullup, u32 *arg);
+
int (*drive_set)(struct mtk_pinctrl *hw,
const struct mtk_pin_desc *desc, u32 arg);
int (*drive_get)(struct mtk_pinctrl *hw,
@@ -277,6 +282,12 @@ int mtk_pinconf_bias_set_rev1(struct mtk_pinctrl *hw,
int mtk_pinconf_bias_get_rev1(struct mtk_pinctrl *hw,
const struct mtk_pin_desc *desc, bool pullup,
int *res);
+int mtk_pinconf_bias_set_combo(struct mtk_pinctrl *hw,
+ const struct mtk_pin_desc *desc,
+ u32 pullup, u32 enable);
+int mtk_pinconf_bias_get_combo(struct mtk_pinctrl *hw,
+ const struct mtk_pin_desc *desc,
+ u32 *pullup, u32 *enable);
int mtk_pinconf_drive_set(struct mtk_pinctrl *hw,
const struct mtk_pin_desc *desc, u32 arg);
diff --git a/drivers/pinctrl/mediatek/pinctrl-paris.c b/drivers/pinctrl/mediatek/pinctrl-paris.c
index d09a726beece..115ebc19fc44 100644
--- a/drivers/pinctrl/mediatek/pinctrl-paris.c
+++ b/drivers/pinctrl/mediatek/pinctrl-paris.c
@@ -78,7 +78,7 @@ 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 err, reg, ret = 1;
+ int pullup, err, reg, ret = 1;
const struct mtk_pin_desc *desc;
if (pin >= hw->soc->npins) {
@@ -89,22 +89,31 @@ static int mtk_pinconf_get(struct pinctrl_dev *pctldev,
switch (param) {
case PIN_CONFIG_BIAS_DISABLE:
- if (hw->soc->bias_disable_get)
- err = hw->soc->bias_disable_get(hw, desc, &ret);
- else
- err = -ENOTSUPP;
- break;
case PIN_CONFIG_BIAS_PULL_UP:
- if (hw->soc->bias_get)
- err = hw->soc->bias_get(hw, desc, 1, &ret);
- else
- err = -ENOTSUPP;
- break;
case PIN_CONFIG_BIAS_PULL_DOWN:
- if (hw->soc->bias_get)
- err = hw->soc->bias_get(hw, desc, 0, &ret);
- else
+ if (hw->soc->bias_get_combo) {
+ err = hw->soc->bias_get_combo(hw, desc, &pullup, &ret);
+ if (err)
+ goto out;
+ if (param == PIN_CONFIG_BIAS_DISABLE) {
+ if (ret == MTK_PUPD_SET_R1R0_00)
+ ret = MTK_DISABLE;
+ } else if (param == PIN_CONFIG_BIAS_PULL_UP) {
+ /* When desire to get pull-up value, return
+ * error if current setting is pull-down
+ */
+ if (!pullup)
+ err = -EINVAL;
+ } else if (param == PIN_CONFIG_BIAS_PULL_DOWN) {
+ /* When desire to get pull-down value, return
+ * error if current setting is pull-up
+ */
+ if (pullup)
+ err = -EINVAL;
+ }
+ } else {
err = -ENOTSUPP;
+ }
break;
case PIN_CONFIG_SLEW_RATE:
err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_SR, &ret);
@@ -196,20 +205,20 @@ static int mtk_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin,
switch ((u32)param) {
case PIN_CONFIG_BIAS_DISABLE:
- if (hw->soc->bias_disable_set)
- err = hw->soc->bias_disable_set(hw, desc);
+ if (hw->soc->bias_set_combo)
+ err = hw->soc->bias_set_combo(hw, desc, 0, MTK_DISABLE);
else
err = -ENOTSUPP;
break;
case PIN_CONFIG_BIAS_PULL_UP:
- if (hw->soc->bias_set)
- err = hw->soc->bias_set(hw, desc, 1);
+ if (hw->soc->bias_set_combo)
+ err = hw->soc->bias_set_combo(hw, desc, 1, arg);
else
err = -ENOTSUPP;
break;
case PIN_CONFIG_BIAS_PULL_DOWN:
- if (hw->soc->bias_set)
- err = hw->soc->bias_set(hw, desc, 0);
+ if (hw->soc->bias_set_combo)
+ err = hw->soc->bias_set_combo(hw, desc, 0, arg);
else
err = -ENOTSUPP;
break;