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author | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2022-10-29 21:40:46 -0700 |
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committer | Bartosz Golaszewski <bartosz.golaszewski@linaro.org> | 2022-11-04 16:14:58 +0100 |
commit | 34cb9352b62366038fd2d5b9d9f393f35d0be1e0 (patch) | |
tree | f78c8ea09e6bba62b53d134a17349c5c998bf2fd /drivers/gpio/gpiolib-of.c | |
parent | d59fdbc7164a6b2a0ed45c13387deac8efeed5a2 (diff) | |
download | linux-34cb9352b62366038fd2d5b9d9f393f35d0be1e0.tar.bz2 |
gpiolib: of: factor out quirk setting polarity via separate property
Several legacy bindings use a separate property to specify polarity of
GPIOs instead of specifying it directly in the GPIO property. Factor
out this code to make it easier to add more such cases.
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Diffstat (limited to 'drivers/gpio/gpiolib-of.c')
-rw-r--r-- | drivers/gpio/gpiolib-of.c | 98 |
1 files changed, 53 insertions, 45 deletions
diff --git a/drivers/gpio/gpiolib-of.c b/drivers/gpio/gpiolib-of.c index 4b91e19366a8..e72b56a87b86 100644 --- a/drivers/gpio/gpiolib-of.c +++ b/drivers/gpio/gpiolib-of.c @@ -186,33 +186,68 @@ static void of_gpio_try_fixup_polarity(const struct device_node *np, } } -static void of_gpio_flags_quirks(const struct device_node *np, - const char *propname, - enum of_gpio_flags *flags, - int index) +static void of_gpio_set_polarity_by_property(const struct device_node *np, + const char *propname, + enum of_gpio_flags *flags) { - of_gpio_try_fixup_polarity(np, propname, flags); + static const struct { + const char *compatible; + const char *gpio_propname; + const char *polarity_propname; + } gpios[] = { +#if IS_ENABLED(CONFIG_FEC) + /* Freescale Fast Ethernet Controller */ + { "fsl,imx25-fec", "phy-reset-gpios", "phy-reset-active-high" }, + { "fsl,imx27-fec", "phy-reset-gpios", "phy-reset-active-high" }, + { "fsl,imx28-fec", "phy-reset-gpios", "phy-reset-active-high" }, + { "fsl,imx6q-fec", "phy-reset-gpios", "phy-reset-active-high" }, + { "fsl,mvf600-fec", "phy-reset-gpios", "phy-reset-active-high" }, + { "fsl,imx6sx-fec", "phy-reset-gpios", "phy-reset-active-high" }, + { "fsl,imx6ul-fec", "phy-reset-gpios", "phy-reset-active-high" }, + { "fsl,imx8mq-fec", "phy-reset-gpios", "phy-reset-active-high" }, + { "fsl,imx8qm-fec", "phy-reset-gpios", "phy-reset-active-high" }, + { "fsl,s32v234-fec", "phy-reset-gpios", "phy-reset-active-high" }, +#endif - /* - * Some GPIO fixed regulator quirks. - * Note that active low is the default. - */ - if (IS_ENABLED(CONFIG_REGULATOR) && - (of_device_is_compatible(np, "regulator-fixed") || - of_device_is_compatible(np, "reg-fixed-voltage") || - (!(strcmp(propname, "enable-gpio") && - strcmp(propname, "enable-gpios")) && - of_device_is_compatible(np, "regulator-gpio")))) { - bool active_high = of_property_read_bool(np, - "enable-active-high"); /* * The regulator GPIO handles are specified such that the * presence or absence of "enable-active-high" solely controls * the polarity of the GPIO line. Any phandle flags must * be actively ignored. */ - of_gpio_quirk_polarity(np, active_high, flags); +#if IS_ENABLED(CONFIG_REGULATOR_FIXED_VOLTAGE) + { "regulator-fixed", "gpios", "enable-active-high" }, + { "regulator-fixed", "gpio", "enable-active-high" }, + { "reg-fixed-voltage", "gpios", "enable-active-high" }, + { "reg-fixed-voltage", "gpio", "enable-active-high" }, +#endif +#if IS_ENABLED(CONFIG_REGULATOR_GPIO) + { "regulator-gpio", "enable-gpio", "enable-active-high" }, + { "regulator-gpio", "enable-gpios", "enable-active-high" }, +#endif + }; + unsigned int i; + bool active_high; + + for (i = 0; i < ARRAY_SIZE(gpios); i++) { + if (of_device_is_compatible(np, gpios[i].compatible) && + !strcmp(propname, gpios[i].gpio_propname)) { + active_high = of_property_read_bool(np, + gpios[i].polarity_propname); + of_gpio_quirk_polarity(np, active_high, flags); + break; + } } +} + +static void of_gpio_flags_quirks(const struct device_node *np, + const char *propname, + enum of_gpio_flags *flags, + int index) +{ + of_gpio_try_fixup_polarity(np, propname, flags); + of_gpio_set_polarity_by_property(np, propname, flags); + /* * Legacy open drain handling for fixed voltage regulators. */ @@ -267,33 +302,6 @@ static void of_gpio_flags_quirks(const struct device_node *np, !strcmp(propname, "snps,reset-gpio") && of_property_read_bool(np, "snps,reset-active-low")) *flags |= OF_GPIO_ACTIVE_LOW; - - /* - * Freescale Fast Ethernet Controller uses a separate property to - * describe polarity of the phy reset line. - */ - if (IS_ENABLED(CONFIG_FEC)) { - static const char * const fec_devices[] = { - "fsl,imx25-fec", - "fsl,imx27-fec", - "fsl,imx28-fec", - "fsl,imx6q-fec", - "fsl,mvf600-fec", - "fsl,imx6sx-fec", - "fsl,imx6ul-fec", - "fsl,imx8mq-fec", - "fsl,imx8qm-fec", - "fsl,s32v234-fec", - NULL - }; - - if (!strcmp(propname, "phy-reset-gpios") && - of_device_compatible_match(np, fec_devices)) { - bool active_high = of_property_read_bool(np, - "phy-reset-active-high"); - of_gpio_quirk_polarity(np, active_high, flags); - } - } } /** |