From 69e0d1b8db8f8cc319f966ec3eb2fffce28c4f28 Mon Sep 17 00:00:00 2001 From: Fabrizio Castro Date: Tue, 13 Feb 2018 13:02:44 +0000 Subject: [PATCH] soc: renesas: rcar-rst: Enable watchdog as reset trigger for Gen2 This patch allows for platform specific quirks as some of the SoC need further customization for the watchdog to work properly, like for R-Car Gen2 and for RZ/G. Signed-off-by: Fabrizio Castro Signed-off-by: Ramesh Shanmugasundaram Signed-off-by: Simon Horman --- drivers/soc/renesas/rcar-rst.c | 37 ++++++++++++++++++++++++++++++------- 1 file changed, 30 insertions(+), 7 deletions(-) diff --git a/drivers/soc/renesas/rcar-rst.c b/drivers/soc/renesas/rcar-rst.c index e2340eb..3413666 100644 --- a/drivers/soc/renesas/rcar-rst.c +++ b/drivers/soc/renesas/rcar-rst.c @@ -13,8 +13,18 @@ #include #include +#define WDTRSTCR_RESET 0xA55A0002 +#define WDTRSTCR 0x0054 + +static int rcar_rst_enable_wdt_reset(void __iomem *base) +{ + iowrite32(WDTRSTCR_RESET, base + WDTRSTCR); + return 0; +} + struct rst_config { - unsigned int modemr; /* Mode Monitoring Register Offset */ + unsigned int modemr; /* Mode Monitoring Register Offset */ + int (*configure)(void *base); /* Platform specific configuration */ }; static const struct rst_config rcar_rst_gen1 __initconst = { @@ -23,6 +33,11 @@ static const struct rst_config rcar_rst_gen1 __initconst = { static const struct rst_config rcar_rst_gen2 __initconst = { .modemr = 0x60, + .configure = rcar_rst_enable_wdt_reset, +}; + +static const struct rst_config rcar_rst_gen3 __initconst = { + .modemr = 0x60, }; static const struct of_device_id rcar_rst_matches[] __initconst = { @@ -38,12 +53,12 @@ static const struct of_device_id rcar_rst_matches[] __initconst = { { .compatible = "renesas,r8a7792-rst", .data = &rcar_rst_gen2 }, { .compatible = "renesas,r8a7793-rst", .data = &rcar_rst_gen2 }, { .compatible = "renesas,r8a7794-rst", .data = &rcar_rst_gen2 }, - /* R-Car Gen3 is handled like R-Car Gen2 */ - { .compatible = "renesas,r8a7795-rst", .data = &rcar_rst_gen2 }, - { .compatible = "renesas,r8a7796-rst", .data = &rcar_rst_gen2 }, - { .compatible = "renesas,r8a77970-rst", .data = &rcar_rst_gen2 }, - { .compatible = "renesas,r8a77980-rst", .data = &rcar_rst_gen2 }, - { .compatible = "renesas,r8a77995-rst", .data = &rcar_rst_gen2 }, + /* R-Car Gen3 */ + { .compatible = "renesas,r8a7795-rst", .data = &rcar_rst_gen3 }, + { .compatible = "renesas,r8a7796-rst", .data = &rcar_rst_gen3 }, + { .compatible = "renesas,r8a77970-rst", .data = &rcar_rst_gen3 }, + { .compatible = "renesas,r8a77980-rst", .data = &rcar_rst_gen3 }, + { .compatible = "renesas,r8a77995-rst", .data = &rcar_rst_gen3 }, { /* sentinel */ } }; @@ -72,6 +87,14 @@ static int __init rcar_rst_init(void) rcar_rst_base = base; cfg = match->data; saved_mode = ioread32(base + cfg->modemr); + if (cfg->configure) { + error = cfg->configure(base); + if (error) { + pr_warn("%pOF: Cannot run SoC specific configuration\n", + np); + goto out_put; + } + } pr_debug("%pOF: MODE = 0x%08x\n", np, saved_mode); -- 2.7.4