[PATCH v5 02/11] pinctrl: Ingenic: Add support for read the pin configuration of X1830.

From: 周琰杰 (Zhou Yanjie)
Date: Fri Apr 16 2021 - 12:14:31 EST


Add X1830 support in "ingenic_pinconf_get()", so that it can read the
configuration of X1830 SoC correctly.

Fixes: d7da2a1e4e08 ("pinctrl: Ingenic: Add pinctrl driver for X1830.")
Cc: <stable@xxxxxxxxxxxxxxx>
Signed-off-by: 周琰杰 (Zhou Yanjie) <zhouyanjie@xxxxxxxxxxxxxx>
Reviewed-by: Andy Shevchenko <andy.shevchenko@xxxxxxxxx>
Reviewed-by: Paul Cercueil <paul@xxxxxxxxxxxxxxx>
---

Notes:
v2:
New patch.

v2->v3:
1.Add fixes tag.
2.Adjust the code, simplify the ingenic_pinconf_get() function.

v3->v4:
1.Add parentheses around the '%' to make it more obvious.
2.Add Cc: <stable@xxxxxxxxxxxxxxx>.
3.Add Andy Shevchenko's Reviewed-by.
4.Add Paul Cercueil's Reviewed-by.

v4->v5:
No change.

drivers/pinctrl/pinctrl-ingenic.c | 40 ++++++++++++++++++++++++++++++---------
1 file changed, 31 insertions(+), 9 deletions(-)

diff --git a/drivers/pinctrl/pinctrl-ingenic.c b/drivers/pinctrl/pinctrl-ingenic.c
index 05dfa0a..3de0f76 100644
--- a/drivers/pinctrl/pinctrl-ingenic.c
+++ b/drivers/pinctrl/pinctrl-ingenic.c
@@ -2109,26 +2109,48 @@ static int ingenic_pinconf_get(struct pinctrl_dev *pctldev,
enum pin_config_param param = pinconf_to_config_param(*config);
unsigned int idx = pin % PINS_PER_GPIO_CHIP;
unsigned int offt = pin / PINS_PER_GPIO_CHIP;
- bool pull;
+ unsigned int bias;
+ bool pull, pullup, pulldown;

- if (jzpc->info->version >= ID_JZ4770)
- pull = !ingenic_get_pin_config(jzpc, pin, JZ4770_GPIO_PEN);
- else
- pull = !ingenic_get_pin_config(jzpc, pin, JZ4740_GPIO_PULL_DIS);
+ if (jzpc->info->version >= ID_X1830) {
+ unsigned int half = PINS_PER_GPIO_CHIP / 2;
+ unsigned int idxh = (pin % half) * 2;
+
+ if (idx < half)
+ regmap_read(jzpc->map, offt * jzpc->info->reg_offset +
+ X1830_GPIO_PEL, &bias);
+ else
+ regmap_read(jzpc->map, offt * jzpc->info->reg_offset +
+ X1830_GPIO_PEH, &bias);
+
+ bias = (bias >> idxh) & (GPIO_PULL_UP | GPIO_PULL_DOWN);
+
+ pullup = (bias == GPIO_PULL_UP) && (jzpc->info->pull_ups[offt] & BIT(idx));
+ pulldown = (bias == GPIO_PULL_DOWN) && (jzpc->info->pull_downs[offt] & BIT(idx));
+
+ } else {
+ if (jzpc->info->version >= ID_JZ4770)
+ pull = !ingenic_get_pin_config(jzpc, pin, JZ4770_GPIO_PEN);
+ else
+ pull = !ingenic_get_pin_config(jzpc, pin, JZ4740_GPIO_PULL_DIS);
+
+ pullup = pull && (jzpc->info->pull_ups[offt] & BIT(idx));
+ pulldown = pull && (jzpc->info->pull_downs[offt] & BIT(idx));
+ }

switch (param) {
case PIN_CONFIG_BIAS_DISABLE:
- if (pull)
+ if (pullup || pulldown)
return -EINVAL;
break;

case PIN_CONFIG_BIAS_PULL_UP:
- if (!pull || !(jzpc->info->pull_ups[offt] & BIT(idx)))
+ if (!pullup)
return -EINVAL;
break;

case PIN_CONFIG_BIAS_PULL_DOWN:
- if (!pull || !(jzpc->info->pull_downs[offt] & BIT(idx)))
+ if (!pulldown)
return -EINVAL;
break;

@@ -2146,7 +2168,7 @@ static void ingenic_set_bias(struct ingenic_pinctrl *jzpc,
if (jzpc->info->version >= ID_X1830) {
unsigned int idx = pin % PINS_PER_GPIO_CHIP;
unsigned int half = PINS_PER_GPIO_CHIP / 2;
- unsigned int idxh = pin % half * 2;
+ unsigned int idxh = (pin % half) * 2;
unsigned int offt = pin / PINS_PER_GPIO_CHIP;

if (idx < half) {
--
2.7.4