On 12/05/2013 08:36 AM, Andy Shevchenko wrote:
> To support some (legacy) firmwares and platforms let's make life easier for
> their customers.
>
> This patch provides a function which converts sfi_gpio_table_entry to
> gpio_desc. The use of it is integrated into GPIO library to enable generic
> access to the SFI GPIO resources.
>
> Signed-off-by: Andy Shevchenko <andriy.shevche...@linux.intel.com>
> ---
> drivers/gpio/Kconfig | 4 ++++
> drivers/gpio/Makefile | 1 +
> drivers/gpio/gpiolib-sfi.c | 28 ++++++++++++++++++++++++++++
> drivers/gpio/gpiolib.c | 3 +++
> drivers/gpio/gpiolib.h | 13 +++++++++++++
> 5 files changed, 49 insertions(+)
> create mode 100644 drivers/gpio/gpiolib-sfi.c
>
> diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
> index ae3682d..a12752a 100644
> --- a/drivers/gpio/Kconfig
> +++ b/drivers/gpio/Kconfig
> @@ -51,6 +51,10 @@ config OF_GPIO
> def_bool y
> depends on OF
>
> +config GPIO_SFI
> + def_bool y
> + depends on SFI
> +
> config GPIO_ACPI
> def_bool y
> depends on ACPI
> diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile
> index ee95154..5373e3a 100644
> --- a/drivers/gpio/Makefile
> +++ b/drivers/gpio/Makefile
> @@ -5,6 +5,7 @@ ccflags-$(CONFIG_DEBUG_GPIO) += -DDEBUG
> obj-$(CONFIG_GPIO_DEVRES) += devres.o
> obj-$(CONFIG_GPIOLIB) += gpiolib.o
> obj-$(CONFIG_OF_GPIO) += gpiolib-of.o
> +obj-$(CONFIG_GPIO_SFI) += gpiolib-sfi.o
> obj-$(CONFIG_GPIO_ACPI) += gpiolib-acpi.o
>
> # Device drivers. Generally keep list sorted alphabetically
> diff --git a/drivers/gpio/gpiolib-sfi.c b/drivers/gpio/gpiolib-sfi.c
> new file mode 100644
> index 0000000..c804314
> --- /dev/null
> +++ b/drivers/gpio/gpiolib-sfi.c
> @@ -0,0 +1,28 @@
> +/*
> + * Simple Firmware Interface (SFI) helpers for GPIO API
> + *
> + * Copyright (C) 2013, Intel Corporation
> + * Author: Andy Shevchenko <andriy.shevche...@linux.intel.com>
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 as
> + * published by the Free Software Foundation.
> + */
> +
> +#include <linux/gpio/consumer.h>
> +#include <linux/sfi.h>
> +#include <linux/errno.h>
> +#include <linux/err.h>
> +
> +#include "gpiolib.h"
> +
> +struct gpio_desc *sfi_get_gpiod_by_name(const char *name)
> +{
> + struct sfi_gpio_table_entry *pentry;
> +
> + pentry = sfi_gpio_get_entry_by_name(name);
> + if (!pentry)
> + return ERR_PTR(-ENODEV);
With my comments on patch 2/3, I'd suggest here:
if (!pentry)
return ERR_PTR(-EINVAL);
if (IS_ERR(pentry))
return pentry;
!pentry == could not find
IS_ERR(pentry) == something else went wrong
Br, David
> +
> + return gpio_to_desc(pentry->pin_no);
> +}
>
--
To unsubscribe from this list: send the line "unsubscribe linux-gpio" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
