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153 lines
3.9 KiB
Diff
153 lines
3.9 KiB
Diff
From e352ec3c581df40f159771b30c262c2bc7fb802e Mon Sep 17 00:00:00 2001
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From: Rafa? Mi?ecki <zajec5@gmail.com>
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Date: Thu, 2 Jan 2014 13:31:32 +0100
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Subject: [PATCH 030/110] MIPS: BCM47XX: Prepare support for GPIO buttons
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So far this adds support for one Netgear model only, but it's designed
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and ready to add many more device. We could hopefully import database
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from OpenWrt.
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Support for SSB is currently disabled, because SSB doesn't implement IRQ
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domain yet.
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Signed-off-by: Rafa? Mi?ecki <zajec5@gmail.com>
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Acked-by: Hauke Mehrtens <hauke@hauke-m.de>
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Acked-by: John Crispin <blogic@openwrt.org>
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Patchwork: http://patchwork.linux-mips.org/patch/6300/
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---
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arch/mips/bcm47xx/Makefile | 2 +-
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arch/mips/bcm47xx/bcm47xx_private.h | 3 ++
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arch/mips/bcm47xx/buttons.c | 95 +++++++++++++++++++++++++++++++++++
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arch/mips/bcm47xx/setup.c | 1 +
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4 files changed, 100 insertions(+), 1 deletion(-)
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create mode 100644 arch/mips/bcm47xx/buttons.c
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--- a/arch/mips/bcm47xx/Makefile
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+++ b/arch/mips/bcm47xx/Makefile
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@@ -4,5 +4,5 @@
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#
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obj-y += irq.o nvram.o prom.o serial.o setup.o time.o sprom.o
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-obj-y += board.o leds.o
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+obj-y += board.o buttons.o leds.o
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obj-$(CONFIG_BCM47XX_SSB) += wgt634u.o
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--- a/arch/mips/bcm47xx/bcm47xx_private.h
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+++ b/arch/mips/bcm47xx/bcm47xx_private.h
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@@ -3,6 +3,9 @@
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#include <linux/kernel.h>
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+/* buttons.c */
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+int __init bcm47xx_buttons_register(void);
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+
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/* leds.c */
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void __init bcm47xx_leds_register(void);
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--- /dev/null
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+++ b/arch/mips/bcm47xx/buttons.c
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@@ -0,0 +1,95 @@
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+#include "bcm47xx_private.h"
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+
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+#include <linux/input.h>
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+#include <linux/gpio_keys.h>
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+#include <linux/interrupt.h>
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+#include <linux/ssb/ssb_embedded.h>
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+#include <bcm47xx_board.h>
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+#include <bcm47xx.h>
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+
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+/**************************************************
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+ * Database
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+ **************************************************/
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+
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+static const struct gpio_keys_button
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+bcm47xx_buttons_netgear_wndr4500_v1[] __initconst = {
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+ {
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+ .code = KEY_WPS_BUTTON,
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+ .gpio = 4,
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+ .active_low = 1,
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+ },
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+ {
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+ .code = KEY_RFKILL,
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+ .gpio = 5,
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+ .active_low = 1,
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+ },
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+ {
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+ .code = KEY_RESTART,
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+ .gpio = 6,
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+ .active_low = 1,
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+ },
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+};
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+
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+/**************************************************
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+ * Init
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+ **************************************************/
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+
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+static struct gpio_keys_platform_data bcm47xx_button_pdata;
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+
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+static struct platform_device bcm47xx_buttons_gpio_keys = {
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+ .name = "gpio-keys",
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+ .dev = {
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+ .platform_data = &bcm47xx_button_pdata,
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+ }
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+};
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+
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+/* Copy data from __initconst */
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+static int __init bcm47xx_buttons_copy(const struct gpio_keys_button *buttons,
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+ size_t nbuttons)
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+{
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+ size_t size = nbuttons * sizeof(*buttons);
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+
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+ bcm47xx_button_pdata.buttons = kmalloc(size, GFP_KERNEL);
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+ if (!bcm47xx_button_pdata.buttons)
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+ return -ENOMEM;
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+ memcpy(bcm47xx_button_pdata.buttons, buttons, size);
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+ bcm47xx_button_pdata.nbuttons = nbuttons;
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+
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+ return 0;
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+}
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+
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+#define bcm47xx_copy_bdata(dev_buttons) \
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+ bcm47xx_buttons_copy(dev_buttons, ARRAY_SIZE(dev_buttons));
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+
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+int __init bcm47xx_buttons_register(void)
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+{
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+ enum bcm47xx_board board = bcm47xx_board_get();
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+ int err;
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+
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+#ifdef CONFIG_BCM47XX_SSB
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+ if (bcm47xx_bus_type == BCM47XX_BUS_TYPE_SSB) {
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+ pr_debug("Buttons on SSB are not supported yet.\n");
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+ return -ENOTSUPP;
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+ }
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+#endif
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+
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+ switch (board) {
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+ case BCM47XX_BOARD_NETGEAR_WNDR4500V1:
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+ err = bcm47xx_copy_bdata(bcm47xx_buttons_netgear_wndr4500_v1);
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+ break;
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+ default:
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+ pr_debug("No buttons configuration found for this device\n");
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+ return -ENOTSUPP;
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+ }
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+
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+ if (err)
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+ return -ENOMEM;
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+
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+ err = platform_device_register(&bcm47xx_buttons_gpio_keys);
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+ if (err) {
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+ pr_err("Failed to register platform device: %d\n", err);
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+ return err;
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+ }
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+
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+ return 0;
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+}
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--- a/arch/mips/bcm47xx/setup.c
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+++ b/arch/mips/bcm47xx/setup.c
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@@ -246,6 +246,7 @@ static int __init bcm47xx_register_bus_c
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#endif
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}
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+ bcm47xx_buttons_register();
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bcm47xx_leds_register();
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return 0;
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