102 lines
2.4 KiB
Diff
102 lines
2.4 KiB
Diff
--- a/arch/mips/bcm47xx/setup.c
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+++ b/arch/mips/bcm47xx/setup.c
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@@ -36,6 +36,7 @@
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#include <linux/ssb/ssb.h>
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#include <linux/ssb/ssb_embedded.h>
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#include <linux/bcma/bcma_soc.h>
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+#include <linux/gpio_wdt.h>
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#include <asm/bootinfo.h>
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#include <asm/prom.h>
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#include <asm/reboot.h>
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@@ -266,6 +267,33 @@ static struct fixed_phy_status bcm47xx_f
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.duplex = DUPLEX_FULL,
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};
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+static struct gpio_wdt_platform_data gpio_wdt_data;
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+
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+static struct platform_device gpio_wdt_device = {
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+ .name = "gpio-wdt",
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+ .id = 0,
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+ .dev = {
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+ .platform_data = &gpio_wdt_data,
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+ },
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+};
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+
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+static int __init bcm47xx_register_gpio_watchdog(void)
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+{
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+ enum bcm47xx_board board = bcm47xx_board_get();
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+
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+ switch (board) {
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+ case BCM47XX_BOARD_HUAWEI_E970:
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+ pr_info("bcm47xx: detected Huawei E970 or similar, starting early gpio_wdt timer\n");
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+ gpio_wdt_data.gpio = 7;
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+ gpio_wdt_data.interval = HZ;
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+ gpio_wdt_data.first_interval = HZ / 5;
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+ return platform_device_register(&gpio_wdt_device);
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+ default:
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+ /* Nothing to do */
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+ return 0;
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+ }
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+}
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+
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static int __init bcm47xx_register_bus_complete(void)
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{
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switch (bcm47xx_bus_type) {
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@@ -284,6 +312,7 @@ static int __init bcm47xx_register_bus_c
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bcm47xx_buttons_register();
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bcm47xx_leds_register();
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fixed_phy_add(PHY_POLL, 0, &bcm47xx_fixed_phy_status);
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+ bcm47xx_register_gpio_watchdog();
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return 0;
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}
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--- a/arch/mips/configs/bcm47xx_defconfig
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+++ b/arch/mips/configs/bcm47xx_defconfig
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@@ -379,6 +379,7 @@ CONFIG_THERMAL=y
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CONFIG_WATCHDOG=y
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CONFIG_WATCHDOG_NOWAYOUT=y
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CONFIG_BCM47XX_WDT=y
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+CONFIG_GPIO_WDT=y
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CONFIG_SSB_DRIVER_GIGE=y
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CONFIG_DISPLAY_SUPPORT=m
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CONFIG_SOUND=m
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--- a/drivers/ssb/embedded.c
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+++ b/drivers/ssb/embedded.c
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@@ -34,11 +34,36 @@ int ssb_watchdog_timer_set(struct ssb_bu
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}
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EXPORT_SYMBOL(ssb_watchdog_timer_set);
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+#ifdef CONFIG_BCM47XX
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+#include <bcm47xx_board.h>
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+
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+static bool ssb_watchdog_supported(void)
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+{
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+ enum bcm47xx_board board = bcm47xx_board_get();
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+
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+ /* The Huawei E970 has a hardware watchdog using a GPIO */
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+ switch (board) {
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+ case BCM47XX_BOARD_HUAWEI_E970:
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+ return false;
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+ default:
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+ return true;
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+ }
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+}
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+#else
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+static bool ssb_watchdog_supported(void)
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+{
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+ return true;
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+}
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+#endif
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+
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int ssb_watchdog_register(struct ssb_bus *bus)
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{
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struct bcm47xx_wdt wdt = {};
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struct platform_device *pdev;
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+ if (!ssb_watchdog_supported())
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+ return 0;
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+
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if (ssb_chipco_available(&bus->chipco)) {
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wdt.driver_data = &bus->chipco;
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wdt.timer_set = ssb_chipco_watchdog_timer_set_wdt;
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