watchdog: s3c2410_wdt: Add support for Watchdog device on Exynos7

Exynos7 SoC has a Watchdog for Atlas (A57) cores
This patch adds support for the Atlas watchdog.

Signed-off-by: Naveen Krishna Chatradhi <ch.naveen@samsung.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>

diff --git a/Documentation/devicetree/bindings/watchdog/samsung-wdt.txt b/Documentation/devicetree/bindings/watchdog/samsung-wdt.txt
index cfff375..8f3d96a 100644 (file)
--- a/Documentation/devicetree/bindings/watchdog/samsung-wdt.txt
+++ b/Documentation/devicetree/bindings/watchdog/samsung-wdt.txt
@@ -9,6 +9,7 @@ Required properties:
        (a) "samsung,s3c2410-wdt" for Exynos4 and previous SoCs
        (b) "samsung,exynos5250-wdt" for Exynos5250
        (c) "samsung,exynos5420-wdt" for Exynos5420
+       (c) "samsung,exynos7-wdt" for Exynos7
 
 - reg : base physical address of the controller and length of memory mapped
        region.

diff --git a/drivers/watchdog/s3c2410_wdt.c b/drivers/watchdog/s3c2410_wdt.c
index 7c6ccd0..015256e 100644 (file)
--- a/drivers/watchdog/s3c2410_wdt.c
+++ b/drivers/watchdog/s3c2410_wdt.c
@@ -155,6 +155,15 @@ static const struct s3c2410_wdt_variant drv_data_exynos5420 = {
        .quirks = QUIRK_HAS_PMU_CONFIG | QUIRK_HAS_RST_STAT,
 };
 
+static const struct s3c2410_wdt_variant drv_data_exynos7 = {
+       .disable_reg = EXYNOS5_WDT_DISABLE_REG_OFFSET,
+       .mask_reset_reg = EXYNOS5_WDT_MASK_RESET_REG_OFFSET,
+       .mask_bit = 0,
+       .rst_stat_reg = EXYNOS5_RST_STAT_REG_OFFSET,
+       .rst_stat_bit = 23,     /* A57 WDTRESET */
+       .quirks = QUIRK_HAS_PMU_CONFIG | QUIRK_HAS_RST_STAT,
+};
+
 static const struct of_device_id s3c2410_wdt_match[] = {
        { .compatible = "samsung,s3c2410-wdt",
          .data = &drv_data_s3c2410 },
@@ -162,6 +171,8 @@ static const struct of_device_id s3c2410_wdt_match[] = {
          .data = &drv_data_exynos5250 },
        { .compatible = "samsung,exynos5420-wdt",
          .data = &drv_data_exynos5420 },
+       { .compatible = "samsung,exynos7-wdt",
+         .data = &drv_data_exynos7 },
        {},
 };
 MODULE_DEVICE_TABLE(of, s3c2410_wdt_match);