[PATCH v6 16/20] watchdog: s3c2410_wdt: Add support for Google gs101 SoC

Peter Griffin
2023-12-09T23:31:40Z

This patch adds the compatibles and drvdata for the Google
gs101 SoC found in Pixel 6, Pixel 6a & Pixel 6 pro phones.

Similar to Exynos850 it has two watchdog instances, one for
each cluster and has some control bits in PMU registers.

gs101 also has the dbgack_mask bit in wtcon register, so
we also enable QUIRK_HAS_DBGACK_BIT.

Tested-by: Will McVicker <willmcvicker@google.com>
Reviewed-by: Sam Protsenko <semen.protsenko@linaro.org>
Signed-off-by: Peter Griffin <peter.griffin@linaro.org>
---
drivers/watchdog/s3c2410_wdt.c | 49 ++++++++++++++++++++++++++++++----
1 file changed, 44 insertions(+), 5 deletions(-)

diff --git a/drivers/watchdog/s3c2410_wdt.c b/drivers/watchdog/s3c2410_wdt.c
index b7a03668f743..ae4457a39c77 100644
--- a/drivers/watchdog/s3c2410_wdt.c
+++ b/drivers/watchdog/s3c2410_wdt.c
@@ -69,6 +69,13 @@
#define EXYNOSAUTOV9_CLUSTER0_WDTRESET_BIT 25
#define EXYNOSAUTOV9_CLUSTER1_WDTRESET_BIT 24

+#define GS_CLUSTER0_NONCPU_OUT 0x1220
+#define GS_CLUSTER1_NONCPU_OUT 0x1420
+#define GS_CLUSTER0_NONCPU_INT_EN 0x1244
+#define GS_CLUSTER1_NONCPU_INT_EN 0x1444
+#define GS_CLUSTER2_NONCPU_INT_EN 0x1644
+#define GS_RST_STAT_REG_OFFSET 0x3B44
+
/**
* DOC: Quirk flags for different Samsung watchdog IP-cores
*
@@ -270,6 +277,32 @@ static const struct s3c2410_wdt_variant drv_data_exynosautov9_cl1 = {
QUIRK_HAS_PMU_RST_STAT | QUIRK_HAS_PMU_CNT_EN,
};

+static const struct s3c2410_wdt_variant drv_data_gs101_cl0 = {
+ .mask_reset_reg = GS_CLUSTER0_NONCPU_INT_EN,
+ .mask_bit = 2,
+ .mask_reset_inv = true,
+ .rst_stat_reg = GS_RST_STAT_REG_OFFSET,
+ .rst_stat_bit = 0,
+ .cnt_en_reg = GS_CLUSTER0_NONCPU_OUT,
+ .cnt_en_bit = 8,
+ .quirks = QUIRK_HAS_PMU_RST_STAT | QUIRK_HAS_PMU_MASK_RESET |
+ QUIRK_HAS_PMU_CNT_EN | QUIRK_HAS_WTCLRINT_REG |
+ QUIRK_HAS_DBGACK_BIT,
+};
+
+static const struct s3c2410_wdt_variant drv_data_gs101_cl1 = {
+ .mask_reset_reg = GS_CLUSTER1_NONCPU_INT_EN,
+ .mask_bit = 2,
+ .mask_reset_inv = true,
+ .rst_stat_reg = GS_RST_STAT_REG_OFFSET,
+ .rst_stat_bit = 1,
+ .cnt_en_reg = GS_CLUSTER1_NONCPU_OUT,
+ .cnt_en_bit = 7,
+ .quirks = QUIRK_HAS_PMU_RST_STAT | QUIRK_HAS_PMU_MASK_RESET |
+ QUIRK_HAS_PMU_CNT_EN | QUIRK_HAS_WTCLRINT_REG |
+ QUIRK_HAS_DBGACK_BIT,
+};
+
static const struct of_device_id s3c2410_wdt_match[] = {
{ .compatible = "samsung,s3c2410-wdt",
.data = &drv_data_s3c2410 },
@@ -285,6 +318,8 @@ static const struct of_device_id s3c2410_wdt_match[] = {
.data = &drv_data_exynos850_cl0 },
{ .compatible = "samsung,exynosautov9-wdt",
.data = &drv_data_exynosautov9_cl0 },
+ { .compatible = "google,gs101-wdt",
+ .data = &drv_data_gs101_cl0 },
{},
};
MODULE_DEVICE_TABLE(of, s3c2410_wdt_match);
@@ -605,9 +640,10 @@ s3c2410_get_wdt_drv_data(struct platform_device *pdev, struct s3c2410_wdt *wdt)
}

#ifdef CONFIG_OF
- /* Choose Exynos850/ExynosAutov9 driver data w.r.t. cluster index */
+ /* Choose Exynos9 SoC family driver data w.r.t. cluster index */
if (variant == &drv_data_exynos850_cl0 ||
- variant == &drv_data_exynosautov9_cl0) {
+ variant == &drv_data_exynosautov9_cl0 ||
+ variant == &drv_data_gs101_cl0) {
u32 index;
int err;

@@ -620,9 +656,12 @@ s3c2410_get_wdt_drv_data(struct platform_device *pdev, struct s3c2410_wdt *wdt)
case 0:
break;
case 1:
- variant = (variant == &drv_data_exynos850_cl0) ?
- &drv_data_exynos850_cl1 :
- &drv_data_exynosautov9_cl1;
+ if (variant == &drv_data_exynos850_cl0)
+ variant = &drv_data_exynos850_cl1;
+ else if (variant == &drv_data_exynosautov9_cl0)
+ variant = &drv_data_exynosautov9_cl1;
+ else if (variant == &drv_data_gs101_cl0)
+ variant = &drv_data_gs101_cl1;
break;
default:
return dev_err_probe(dev, -EINVAL, "wrong cluster index: %u\n", index);
--
2.43.0.472.g3155946c3a-goog