diff options
Diffstat (limited to 'target/linux/brcm63xx/patches-4.4/000-4.7-01-pinctrl-Add-devm_-apis-for-pinctrl_-register-unregis.patch')
| -rw-r--r-- | target/linux/brcm63xx/patches-4.4/000-4.7-01-pinctrl-Add-devm_-apis-for-pinctrl_-register-unregis.patch | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/target/linux/brcm63xx/patches-4.4/000-4.7-01-pinctrl-Add-devm_-apis-for-pinctrl_-register-unregis.patch b/target/linux/brcm63xx/patches-4.4/000-4.7-01-pinctrl-Add-devm_-apis-for-pinctrl_-register-unregis.patch new file mode 100644 index 0000000..205b6d7 --- /dev/null +++ b/target/linux/brcm63xx/patches-4.4/000-4.7-01-pinctrl-Add-devm_-apis-for-pinctrl_-register-unregis.patch @@ -0,0 +1,108 @@ +From 80e0f8d94d3090f0f7bf3faf3e6180e920ee0d22 Mon Sep 17 00:00:00 2001 +From: Laxman Dewangan <ldewangan@nvidia.com> +Date: Wed, 24 Feb 2016 14:12:59 +0530 +Subject: [PATCH] pinctrl: Add devm_ apis for pinctrl_{register, unregister} + +Add device managed APIs devm_pinctrl_register() and +devm_pinctrl_unregister() for the APIs pinctrl_register() +and pinctrl_unregister(). + +This helps in reducing code in error path and sometimes +removal of .remove callback for driver unbind. + +Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> +Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de> +Acked-by: Bjorn Andersson <bjorn.andersson@linaro.org> +Signed-off-by: Linus Walleij <linus.walleij@linaro.org> +--- + drivers/pinctrl/core.c | 63 +++++++++++++++++++++++++++++++++++++++++ + include/linux/pinctrl/pinctrl.h | 6 ++++ + 2 files changed, 69 insertions(+) + +--- a/drivers/pinctrl/core.c ++++ b/drivers/pinctrl/core.c +@@ -1861,6 +1861,69 @@ void pinctrl_unregister(struct pinctrl_d + } + EXPORT_SYMBOL_GPL(pinctrl_unregister); + ++static void devm_pinctrl_dev_release(struct device *dev, void *res) ++{ ++ struct pinctrl_dev *pctldev = *(struct pinctrl_dev **)res; ++ ++ pinctrl_unregister(pctldev); ++} ++ ++static int devm_pinctrl_dev_match(struct device *dev, void *res, void *data) ++{ ++ struct pctldev **r = res; ++ ++ if (WARN_ON(!r || !*r)) ++ return 0; ++ ++ return *r == data; ++} ++ ++/** ++ * devm_pinctrl_register() - Resource managed version of pinctrl_register(). ++ * @dev: parent device for this pin controller ++ * @pctldesc: descriptor for this pin controller ++ * @driver_data: private pin controller data for this pin controller ++ * ++ * Returns an error pointer if pincontrol register failed. Otherwise ++ * it returns valid pinctrl handle. ++ * ++ * The pinctrl device will be automatically released when the device is unbound. ++ */ ++struct pinctrl_dev *devm_pinctrl_register(struct device *dev, ++ struct pinctrl_desc *pctldesc, ++ void *driver_data) ++{ ++ struct pinctrl_dev **ptr, *pctldev; ++ ++ ptr = devres_alloc(devm_pinctrl_dev_release, sizeof(*ptr), GFP_KERNEL); ++ if (!ptr) ++ return ERR_PTR(-ENOMEM); ++ ++ pctldev = pinctrl_register(pctldesc, dev, driver_data); ++ if (IS_ERR(pctldev)) { ++ devres_free(ptr); ++ return pctldev; ++ } ++ ++ *ptr = pctldev; ++ devres_add(dev, ptr); ++ ++ return pctldev; ++} ++EXPORT_SYMBOL_GPL(devm_pinctrl_register); ++ ++/** ++ * devm_pinctrl_unregister() - Resource managed version of pinctrl_unregister(). ++ * @dev: device for which which resource was allocated ++ * @pctldev: the pinctrl device to unregister. ++ */ ++void devm_pinctrl_unregister(struct device *dev, struct pinctrl_dev *pctldev) ++{ ++ WARN_ON(devres_release(dev, devm_pinctrl_dev_release, ++ devm_pinctrl_dev_match, pctldev)); ++} ++EXPORT_SYMBOL_GPL(devm_pinctrl_unregister); ++ + static int __init pinctrl_init(void) + { + pr_info("initialized pinctrl subsystem\n"); +--- a/include/linux/pinctrl/pinctrl.h ++++ b/include/linux/pinctrl/pinctrl.h +@@ -144,6 +144,12 @@ struct pinctrl_desc { + extern struct pinctrl_dev *pinctrl_register(struct pinctrl_desc *pctldesc, + struct device *dev, void *driver_data); + extern void pinctrl_unregister(struct pinctrl_dev *pctldev); ++extern struct pinctrl_dev *devm_pinctrl_register(struct device *dev, ++ struct pinctrl_desc *pctldesc, ++ void *driver_data); ++extern void devm_pinctrl_unregister(struct device *dev, ++ struct pinctrl_dev *pctldev); ++ + extern bool pin_is_valid(struct pinctrl_dev *pctldev, int pin); + extern void pinctrl_add_gpio_range(struct pinctrl_dev *pctldev, + struct pinctrl_gpio_range *range); |