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SubjectRe: [PATCH 05/23] gpiolib: unexport devprop_gpiochip_set_names()
On Fri, Sep 04, 2020 at 05:45:29PM +0200, Bartosz Golaszewski wrote:
> From: Bartosz Golaszewski <bgolaszewski@baylibre.com>
>
> Now that devprop_gpiochip_set_names() is only used in a single place
> inside drivers/gpio/gpiolib.c, there's no need anymore for it to be
> exported or to even live in its own source file. Pull this function into
> the core source file for gpiolib.

I have mixed feelings about this. We may simply unexport and attach object file
to gpiolib.o. Would it be expected to see more functions in this file in the
future?

> Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
> ---
> drivers/gpio/Makefile | 1 -
> drivers/gpio/gpiolib-devprop.c | 64 ----------------------------------
> drivers/gpio/gpiolib.c | 48 +++++++++++++++++++++++++
> include/linux/gpio/driver.h | 2 --
> 4 files changed, 48 insertions(+), 67 deletions(-)
> delete mode 100644 drivers/gpio/gpiolib-devprop.c
>
> diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile
> index 4f9abff4f2dc..639275eb4e4d 100644
> --- a/drivers/gpio/Makefile
> +++ b/drivers/gpio/Makefile
> @@ -6,7 +6,6 @@ ccflags-$(CONFIG_DEBUG_GPIO) += -DDEBUG
> obj-$(CONFIG_GPIOLIB) += gpiolib.o
> obj-$(CONFIG_GPIOLIB) += gpiolib-devres.o
> obj-$(CONFIG_GPIOLIB) += gpiolib-legacy.o
> -obj-$(CONFIG_GPIOLIB) += gpiolib-devprop.o
> obj-$(CONFIG_GPIOLIB) += gpiolib-cdev.o
> obj-$(CONFIG_OF_GPIO) += gpiolib-of.o
> obj-$(CONFIG_GPIO_SYSFS) += gpiolib-sysfs.o
> diff --git a/drivers/gpio/gpiolib-devprop.c b/drivers/gpio/gpiolib-devprop.c
> deleted file mode 100644
> index a28659b4f9c9..000000000000
> --- a/drivers/gpio/gpiolib-devprop.c
> +++ /dev/null
> @@ -1,64 +0,0 @@
> -// SPDX-License-Identifier: GPL-2.0
> -/*
> - * Device property helpers for GPIO chips.
> - *
> - * Copyright (C) 2016, Intel Corporation
> - * Author: Mika Westerberg <mika.westerberg@linux.intel.com>
> - */
> -
> -#include <linux/property.h>
> -#include <linux/slab.h>
> -#include <linux/gpio/consumer.h>
> -#include <linux/gpio/driver.h>
> -#include <linux/export.h>
> -
> -#include "gpiolib.h"
> -
> -/**
> - * devprop_gpiochip_set_names - Set GPIO line names using device properties
> - * @chip: GPIO chip whose lines should be named, if possible
> - *
> - * Looks for device property "gpio-line-names" and if it exists assigns
> - * GPIO line names for the chip. The memory allocated for the assigned
> - * names belong to the underlying software node and should not be released
> - * by the caller.
> - */
> -int devprop_gpiochip_set_names(struct gpio_chip *chip)
> -{
> - struct gpio_device *gdev = chip->gpiodev;
> - struct device *dev = chip->parent;
> - const char **names;
> - int ret, i;
> - int count;
> -
> - count = device_property_read_string_array(dev, "gpio-line-names",
> - NULL, 0);
> - if (count < 0)
> - return 0;
> -
> - if (count > gdev->ngpio) {
> - dev_warn(&gdev->dev, "gpio-line-names is length %d but should be at most length %d",
> - count, gdev->ngpio);
> - count = gdev->ngpio;
> - }
> -
> - names = kcalloc(count, sizeof(*names), GFP_KERNEL);
> - if (!names)
> - return -ENOMEM;
> -
> - ret = device_property_read_string_array(dev, "gpio-line-names",
> - names, count);
> - if (ret < 0) {
> - dev_warn(&gdev->dev, "failed to read GPIO line names\n");
> - kfree(names);
> - return ret;
> - }
> -
> - for (i = 0; i < count; i++)
> - gdev->descs[i].name = names[i];
> -
> - kfree(names);
> -
> - return 0;
> -}
> -EXPORT_SYMBOL_GPL(devprop_gpiochip_set_names);
> diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
> index 0d390f0ec32c..15c99cf560ee 100644
> --- a/drivers/gpio/gpiolib.c
> +++ b/drivers/gpio/gpiolib.c
> @@ -358,6 +358,54 @@ static int gpiochip_set_desc_names(struct gpio_chip *gc)
> return 0;
> }
>
> +/*
> + * devprop_gpiochip_set_names - Set GPIO line names using device properties
> + * @chip: GPIO chip whose lines should be named, if possible
> + *
> + * Looks for device property "gpio-line-names" and if it exists assigns
> + * GPIO line names for the chip. The memory allocated for the assigned
> + * names belong to the underlying software node and should not be released
> + * by the caller.
> + */
> +static int devprop_gpiochip_set_names(struct gpio_chip *chip)
> +{
> + struct gpio_device *gdev = chip->gpiodev;
> + struct device *dev = chip->parent;
> + const char **names;
> + int ret, i;
> + int count;
> +
> + count = device_property_read_string_array(dev, "gpio-line-names",
> + NULL, 0);
> + if (count < 0)
> + return 0;
> +
> + if (count > gdev->ngpio) {
> + dev_warn(&gdev->dev, "gpio-line-names is length %d but should be at most length %d",
> + count, gdev->ngpio);
> + count = gdev->ngpio;
> + }
> +
> + names = kcalloc(count, sizeof(*names), GFP_KERNEL);
> + if (!names)
> + return -ENOMEM;
> +
> + ret = device_property_read_string_array(dev, "gpio-line-names",
> + names, count);
> + if (ret < 0) {
> + dev_warn(&gdev->dev, "failed to read GPIO line names\n");
> + kfree(names);
> + return ret;
> + }
> +
> + for (i = 0; i < count; i++)
> + gdev->descs[i].name = names[i];
> +
> + kfree(names);
> +
> + return 0;
> +}
> +
> static unsigned long *gpiochip_allocate_mask(struct gpio_chip *gc)
> {
> unsigned long *p;
> diff --git a/include/linux/gpio/driver.h b/include/linux/gpio/driver.h
> index 56485a040b82..4a7e295c3640 100644
> --- a/include/linux/gpio/driver.h
> +++ b/include/linux/gpio/driver.h
> @@ -756,8 +756,6 @@ struct gpio_desc *gpiochip_request_own_desc(struct gpio_chip *gc,
> enum gpiod_flags dflags);
> void gpiochip_free_own_desc(struct gpio_desc *desc);
>
> -int devprop_gpiochip_set_names(struct gpio_chip *gc);
> -
> #ifdef CONFIG_GPIOLIB
>
> /* lock/unlock as IRQ */
> --
> 2.26.1
>

--
With Best Regards,
Andy Shevchenko


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