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https://github.com/edk2-porting/linux-next.git
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832f5dacfa
Currently CONFIG_ARCH_HAVE_CUSTOM_GPIO_H is defined for all MIPS machines, and each machine type provides its own gpio.h. However only a handful really implement the GPIO API, most just forward everythings to gpiolib. The Alchemy machine is notable as it provides a system to allow implementing the GPIO API at the board level. But it is not used by any board currently supported, so it can also be removed. For most machine types we can just remove the custom gpio.h, as well as the custom wrappers if some exists. Some of the code found in the wrappers must be moved to the respective GPIO driver. A few more fixes are need in some drivers as they rely on linux/gpio.h to provides some machine specific definitions, or used asm/gpio.h instead of linux/gpio.h for the gpio API. Signed-off-by: Alban Bedel <albeu@free.fr> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Cc: linux-mips@linux-mips.org Cc: Hauke Mehrtens <hauke@hauke-m.de> Cc: Rafał Miłecki <zajec5@gmail.com> Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Cc: Tejun Heo <tj@kernel.org> Cc: Alexandre Courbot <gnurou@gmail.com> Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com> Cc: Florian Fainelli <florian@openwrt.org> Cc: Manuel Lauss <manuel.lauss@gmail.com> Cc: Joe Perches <joe@perches.com> Cc: Daniel Walter <dwalter@google.com> Cc: Sergey Ryazanov <ryazanov.s.a@gmail.com> Cc: Huacai Chen <chenhc@lemote.com> Cc: James Hartley <james.hartley@imgtec.com> Cc: Andrew Bresticker <abrestic@chromium.org> Cc: Paul Burton <paul.burton@imgtec.com> Cc: Jiri Kosina <jkosina@suse.cz> Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: Wolfram Sang <wsa@the-dreams.de> Cc: Randy Dunlap <rdunlap@infradead.org> Cc: Varka Bhadram <varkabhadram@gmail.com> Cc: Masanari Iida <standby24x7@gmail.com> Cc: Tomi Valkeinen <tomi.valkeinen@ti.com> Cc: Michael Buesch <m@bues.ch> Cc: abdoulaye berthe <berthe.ab@gmail.com> Cc: linux-kernel@vger.kernel.org Cc: linux-ide@vger.kernel.org Cc: linux-gpio@vger.kernel.org Cc: linux-input@vger.kernel.org Cc: netdev@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/10828/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
108 lines
2.6 KiB
C
108 lines
2.6 KiB
C
/*
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* Support for the S1 button on Routerboard 532
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*
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* Copyright (C) 2009 Phil Sutter <n0-1@freewrt.org>
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*/
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#include <linux/input-polldev.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/gpio.h>
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#include <asm/mach-rc32434/gpio.h>
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#include <asm/mach-rc32434/rb.h>
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#define DRV_NAME "rb532-button"
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#define RB532_BTN_RATE 100 /* msec */
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#define RB532_BTN_KSYM BTN_0
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/* The S1 button state is provided by GPIO pin 1. But as this
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* pin is also used for uart input as alternate function, the
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* operational modes must be switched first:
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* 1) disable uart using set_latch_u5()
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* 2) turn off alternate function implicitly through
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* gpio_direction_input()
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* 3) read the GPIO's current value
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* 4) undo step 2 by enabling alternate function (in this
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* mode the GPIO direction is fixed, so no change needed)
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* 5) turn on uart again
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* The GPIO value occurs to be inverted, so pin high means
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* button is not pressed.
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*/
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static bool rb532_button_pressed(void)
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{
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int val;
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set_latch_u5(0, LO_FOFF);
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gpio_direction_input(GPIO_BTN_S1);
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val = gpio_get_value(GPIO_BTN_S1);
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rb532_gpio_set_func(GPIO_BTN_S1);
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set_latch_u5(LO_FOFF, 0);
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return !val;
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}
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static void rb532_button_poll(struct input_polled_dev *poll_dev)
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{
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input_report_key(poll_dev->input, RB532_BTN_KSYM,
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rb532_button_pressed());
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input_sync(poll_dev->input);
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}
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static int rb532_button_probe(struct platform_device *pdev)
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{
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struct input_polled_dev *poll_dev;
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int error;
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poll_dev = input_allocate_polled_device();
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if (!poll_dev)
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return -ENOMEM;
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poll_dev->poll = rb532_button_poll;
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poll_dev->poll_interval = RB532_BTN_RATE;
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poll_dev->input->name = "rb532 button";
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poll_dev->input->phys = "rb532/button0";
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poll_dev->input->id.bustype = BUS_HOST;
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poll_dev->input->dev.parent = &pdev->dev;
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dev_set_drvdata(&pdev->dev, poll_dev);
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input_set_capability(poll_dev->input, EV_KEY, RB532_BTN_KSYM);
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error = input_register_polled_device(poll_dev);
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if (error) {
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input_free_polled_device(poll_dev);
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return error;
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}
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return 0;
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}
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static int rb532_button_remove(struct platform_device *pdev)
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{
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struct input_polled_dev *poll_dev = dev_get_drvdata(&pdev->dev);
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input_unregister_polled_device(poll_dev);
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input_free_polled_device(poll_dev);
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return 0;
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}
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static struct platform_driver rb532_button_driver = {
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.probe = rb532_button_probe,
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.remove = rb532_button_remove,
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.driver = {
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.name = DRV_NAME,
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},
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};
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module_platform_driver(rb532_button_driver);
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MODULE_AUTHOR("Phil Sutter <n0-1@freewrt.org>");
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION("Support for S1 button on Routerboard 532");
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MODULE_ALIAS("platform:" DRV_NAME);
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