b9762bebc6
Most users of get/set array functions iterate consecutive bits of data, usually a single integer, while processing array of results obtained from, or building an array of values to be passed to those functions. Save time wasted on those iterations by changing the functions' API to accept bitmaps. All current users are updated as well. More benefits from the change are expected as soon as planned support for accepting/passing those bitmaps directly from/to respective GPIO chip callbacks if applicable is implemented. Cc: Jonathan Corbet <corbet@lwn.net> Cc: Miguel Ojeda Sandonis <miguel.ojeda.sandonis@gmail.com> 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> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Tested-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
107 lines
2.3 KiB
C
107 lines
2.3 KiB
C
/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 2011, 2012 Cavium, Inc.
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*/
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#include <linux/platform_device.h>
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#include <linux/device.h>
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#include <linux/of_mdio.h>
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#include <linux/module.h>
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#include <linux/phy.h>
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#include <linux/mdio-mux.h>
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#include <linux/gpio/consumer.h>
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#define DRV_VERSION "1.1"
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#define DRV_DESCRIPTION "GPIO controlled MDIO bus multiplexer driver"
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struct mdio_mux_gpio_state {
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struct gpio_descs *gpios;
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void *mux_handle;
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};
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static int mdio_mux_gpio_switch_fn(int current_child, int desired_child,
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void *data)
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{
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struct mdio_mux_gpio_state *s = data;
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DECLARE_BITMAP(values, BITS_PER_TYPE(desired_child));
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if (current_child == desired_child)
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return 0;
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values[0] = desired_child;
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gpiod_set_array_value_cansleep(s->gpios->ndescs, s->gpios->desc,
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values);
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return 0;
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}
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static int mdio_mux_gpio_probe(struct platform_device *pdev)
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{
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struct mdio_mux_gpio_state *s;
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struct gpio_descs *gpios;
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int r;
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gpios = gpiod_get_array(&pdev->dev, NULL, GPIOD_OUT_LOW);
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if (IS_ERR(gpios))
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return PTR_ERR(gpios);
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s = devm_kzalloc(&pdev->dev, sizeof(*s), GFP_KERNEL);
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if (!s) {
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gpiod_put_array(gpios);
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return -ENOMEM;
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}
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s->gpios = gpios;
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r = mdio_mux_init(&pdev->dev, pdev->dev.of_node,
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mdio_mux_gpio_switch_fn, &s->mux_handle, s, NULL);
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if (r != 0) {
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gpiod_put_array(s->gpios);
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return r;
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}
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pdev->dev.platform_data = s;
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return 0;
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}
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static int mdio_mux_gpio_remove(struct platform_device *pdev)
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{
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struct mdio_mux_gpio_state *s = dev_get_platdata(&pdev->dev);
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mdio_mux_uninit(s->mux_handle);
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gpiod_put_array(s->gpios);
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return 0;
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}
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static const struct of_device_id mdio_mux_gpio_match[] = {
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{
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.compatible = "mdio-mux-gpio",
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},
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{
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/* Legacy compatible property. */
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.compatible = "cavium,mdio-mux-sn74cbtlv3253",
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},
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{},
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};
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MODULE_DEVICE_TABLE(of, mdio_mux_gpio_match);
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static struct platform_driver mdio_mux_gpio_driver = {
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.driver = {
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.name = "mdio-mux-gpio",
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.of_match_table = mdio_mux_gpio_match,
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},
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.probe = mdio_mux_gpio_probe,
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.remove = mdio_mux_gpio_remove,
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};
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module_platform_driver(mdio_mux_gpio_driver);
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MODULE_DESCRIPTION(DRV_DESCRIPTION);
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MODULE_VERSION(DRV_VERSION);
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MODULE_AUTHOR("David Daney");
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MODULE_LICENSE("GPL");
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