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 <[email protected]> Signed-off-by: Ramesh Shanmugasundaram <[email protected]> --- drivers/soc/renesas/rcar-rst.c | 21 ++++++++++++++++++++- 1 file changed, 20 insertions(+), 1 deletion(-) diff --git a/drivers/soc/renesas/rcar-rst.c b/drivers/soc/renesas/rcar-rst.c index f7a0d54..5f52aea 100644 --- a/drivers/soc/renesas/rcar-rst.c +++ b/drivers/soc/renesas/rcar-rst.c @@ -13,8 +13,18 @@ #include <linux/of_address.h> #include <linux/soc/renesas/rcar-rst.h> +#define WDTRSTCR_RESET 0xA55A0002 +#define WDTRSTCR 0x0054 + +static int gen2_configuration(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 +33,7 @@ static const struct rst_config rcar_rst_gen1 __initconst = { static const struct rst_config rcar_rst_gen2 __initconst = { .modemr = 0x60, + .configure = gen2_configuration, }; static const struct rst_config rcar_rst_gen3 __initconst = { @@ -79,6 +90,14 @@ 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
