[PATCH v7 12/16] watchdog: s3c2410_wdt: Add support for Google gs101 SoC
Guenter Roeck
linux at roeck-us.net
Tue Dec 12 13:18:59 PST 2023
On 12/11/23 08:23, Peter Griffin wrote:
> 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 at google.com>
> Reviewed-by: Sam Protsenko <semen.protsenko at linaro.org>
> Signed-off-by: Peter Griffin <peter.griffin at linaro.org>
Reviewed-by: Guenter Roeck <linux at roeck-us.net>
> ---
> 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..c3046610ab5d 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
> *
> @@ -270,7 +277,35 @@ 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 = "google,gs101-wdt",
> + .data = &drv_data_gs101_cl0 },
> { .compatible = "samsung,s3c2410-wdt",
> .data = &drv_data_s3c2410 },
> { .compatible = "samsung,s3c6410-wdt",
> @@ -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);
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