mirror of
https://github.com/torvalds/linux.git
synced 2024-11-18 01:51:53 +00:00
77588c14ac
In order to make use of array info obtained from gpiod_get_array() and speed up processing of arrays matching single GPIO chip layout, that information must be passed to get/set array functions. Extend the functions' API with that additional parameter and update all users. Pass NULL if a user builds an array itself from single GPIOs. Cc: Jonathan Corbet <corbet@lwn.net> Cc: Miguel Ojeda Sandonis <miguel.ojeda.sandonis@gmail.com> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Sebastien Bourdelin <sebastien.bourdelin@savoirfairelinux.com> Cc: Lukas Wunner <lukas@wunner.de> Cc: Peter Korsgaard <peter.korsgaard@barco.com> Cc: Peter Rosin <peda@axentia.se> Cc: Andrew Lunn <andrew@lunn.ch> Cc: Florian Fainelli <f.fainelli@gmail.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Rojhalat Ibrahim <imr@rtschenk.de> Cc: Dominik Brodowski <linux@dominikbrodowski.net> Cc: Russell King <rmk+kernel@armlinux.org.uk> Cc: Kishon Vijay Abraham I <kishon@ti.com> Cc: Tony Lindgren <tony@atomide.com> Cc: Lars-Peter Clausen <lars@metafoo.de> Cc: Michael Hennerich <Michael.Hennerich@analog.com> Cc: Jonathan Cameron <jic23@kernel.org> Cc: Hartmut Knaack <knaack.h@gmx.de> Cc: Peter Meerwald-Stadler <pmeerw@pmeerw.net> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Jiri Slaby <jslaby@suse.com> Cc: Yegor Yefremov <yegorslists@googlemail.com> Cc: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Janusz Krzysztofik <jmkrzyszt@gmail.com> Acked-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
107 lines
2.3 KiB
C
107 lines
2.3 KiB
C
/*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file "COPYING" in the main directory of this archive
|
|
* for more details.
|
|
*
|
|
* Copyright (C) 2011, 2012 Cavium, Inc.
|
|
*/
|
|
|
|
#include <linux/platform_device.h>
|
|
#include <linux/device.h>
|
|
#include <linux/of_mdio.h>
|
|
#include <linux/module.h>
|
|
#include <linux/phy.h>
|
|
#include <linux/mdio-mux.h>
|
|
#include <linux/gpio/consumer.h>
|
|
|
|
#define DRV_VERSION "1.1"
|
|
#define DRV_DESCRIPTION "GPIO controlled MDIO bus multiplexer driver"
|
|
|
|
struct mdio_mux_gpio_state {
|
|
struct gpio_descs *gpios;
|
|
void *mux_handle;
|
|
};
|
|
|
|
static int mdio_mux_gpio_switch_fn(int current_child, int desired_child,
|
|
void *data)
|
|
{
|
|
struct mdio_mux_gpio_state *s = data;
|
|
DECLARE_BITMAP(values, BITS_PER_TYPE(desired_child));
|
|
|
|
if (current_child == desired_child)
|
|
return 0;
|
|
|
|
values[0] = desired_child;
|
|
|
|
gpiod_set_array_value_cansleep(s->gpios->ndescs, s->gpios->desc,
|
|
s->gpios->info, values);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mdio_mux_gpio_probe(struct platform_device *pdev)
|
|
{
|
|
struct mdio_mux_gpio_state *s;
|
|
struct gpio_descs *gpios;
|
|
int r;
|
|
|
|
gpios = gpiod_get_array(&pdev->dev, NULL, GPIOD_OUT_LOW);
|
|
if (IS_ERR(gpios))
|
|
return PTR_ERR(gpios);
|
|
|
|
s = devm_kzalloc(&pdev->dev, sizeof(*s), GFP_KERNEL);
|
|
if (!s) {
|
|
gpiod_put_array(gpios);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
s->gpios = gpios;
|
|
|
|
r = mdio_mux_init(&pdev->dev, pdev->dev.of_node,
|
|
mdio_mux_gpio_switch_fn, &s->mux_handle, s, NULL);
|
|
|
|
if (r != 0) {
|
|
gpiod_put_array(s->gpios);
|
|
return r;
|
|
}
|
|
|
|
pdev->dev.platform_data = s;
|
|
return 0;
|
|
}
|
|
|
|
static int mdio_mux_gpio_remove(struct platform_device *pdev)
|
|
{
|
|
struct mdio_mux_gpio_state *s = dev_get_platdata(&pdev->dev);
|
|
mdio_mux_uninit(s->mux_handle);
|
|
gpiod_put_array(s->gpios);
|
|
return 0;
|
|
}
|
|
|
|
static const struct of_device_id mdio_mux_gpio_match[] = {
|
|
{
|
|
.compatible = "mdio-mux-gpio",
|
|
},
|
|
{
|
|
/* Legacy compatible property. */
|
|
.compatible = "cavium,mdio-mux-sn74cbtlv3253",
|
|
},
|
|
{},
|
|
};
|
|
MODULE_DEVICE_TABLE(of, mdio_mux_gpio_match);
|
|
|
|
static struct platform_driver mdio_mux_gpio_driver = {
|
|
.driver = {
|
|
.name = "mdio-mux-gpio",
|
|
.of_match_table = mdio_mux_gpio_match,
|
|
},
|
|
.probe = mdio_mux_gpio_probe,
|
|
.remove = mdio_mux_gpio_remove,
|
|
};
|
|
|
|
module_platform_driver(mdio_mux_gpio_driver);
|
|
|
|
MODULE_DESCRIPTION(DRV_DESCRIPTION);
|
|
MODULE_VERSION(DRV_VERSION);
|
|
MODULE_AUTHOR("David Daney");
|
|
MODULE_LICENSE("GPL");
|