5.15-stable review patch. If anyone has any objections, please let me know.
------------------
From: Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx>
[ Upstream commit e3186e36925fc18384492491ebcf3da749780a30 ]
There are several instances where we use a separate property to
override polarity specified in gpio property. Factor it out into
a separate function.
Reviewed-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@xxxxxxxxxx>
Stable-dep-of: f8d76c2c313c ("gpiolib: of: add polarity quirk for TSC2005")
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/gpio/gpiolib-of.c | 48 +++++++++++++++++++++++----------------
1 file changed, 28 insertions(+), 20 deletions(-)
diff --git a/drivers/gpio/gpiolib-of.c b/drivers/gpio/gpiolib-of.c
index 7a96eb626a08b..e9da0d5017c02 100644
--- a/drivers/gpio/gpiolib-of.c
+++ b/drivers/gpio/gpiolib-of.c
@@ -130,6 +130,28 @@ bool of_gpio_need_valid_mask(const struct gpio_chip *gc)
return false;
}
+/*
+ * Overrides stated polarity of a gpio line and warns when there is a
+ * discrepancy.
+ */
+static void of_gpio_quirk_polarity(const struct device_node *np,
+ bool active_high,
+ enum of_gpio_flags *flags)
+{
+ if (active_high) {
+ if (*flags & OF_GPIO_ACTIVE_LOW) {
+ pr_warn("%s GPIO handle specifies active low - ignored\n",
+ of_node_full_name(np));
+ *flags &= ~OF_GPIO_ACTIVE_LOW;
+ }
+ } else {
+ if (!(*flags & OF_GPIO_ACTIVE_LOW))
+ pr_info("%s enforce active low on GPIO handle\n",
+ of_node_full_name(np));
+ *flags |= OF_GPIO_ACTIVE_LOW;
+ }
+}
+
static void of_gpio_flags_quirks(const struct device_node *np,
const char *propname,
enum of_gpio_flags *flags,
@@ -145,7 +167,7 @@ static void of_gpio_flags_quirks(const struct device_node *np,
(!(strcmp(propname, "enable-gpio") &&
strcmp(propname, "enable-gpios")) &&
of_device_is_compatible(np, "regulator-gpio")))) {
- bool active_low = !of_property_read_bool(np,
+ bool active_high = of_property_read_bool(np,
"enable-active-high");
/*
* The regulator GPIO handles are specified such that the
@@ -153,13 +175,7 @@ static void of_gpio_flags_quirks(const struct device_node *np,
* the polarity of the GPIO line. Any phandle flags must
* be actively ignored.
*/
- if ((*flags & OF_GPIO_ACTIVE_LOW) && !active_low) {
- pr_warn("%s GPIO handle specifies active low - ignored\n",
- of_node_full_name(np));
- *flags &= ~OF_GPIO_ACTIVE_LOW;
- }
- if (active_low)
- *flags |= OF_GPIO_ACTIVE_LOW;
+ of_gpio_quirk_polarity(np, active_high, flags);
}
/*
* Legacy open drain handling for fixed voltage regulators.
@@ -200,18 +216,10 @@ static void of_gpio_flags_quirks(const struct device_node *np,
* conflict and the "spi-cs-high" flag will
* take precedence.
*/
- if (of_property_read_bool(child, "spi-cs-high")) {
- if (*flags & OF_GPIO_ACTIVE_LOW) {
- pr_warn("%s GPIO handle specifies active low - ignored\n",
- of_node_full_name(child));
- *flags &= ~OF_GPIO_ACTIVE_LOW;
- }
- } else {
- if (!(*flags & OF_GPIO_ACTIVE_LOW))
- pr_info("%s enforce active low on chipselect handle\n",
- of_node_full_name(child));
- *flags |= OF_GPIO_ACTIVE_LOW;
- }
+ bool active_high = of_property_read_bool(child,
+ "spi-cs-high");
+ of_gpio_quirk_polarity(child, active_high,
+ flags);
of_node_put(child);
break;
}
--
2.43.0
