On Mon, Jun 22, 2020 at 10:42:05AM +0200, Ahmad Fatoum wrote:
> The reset controller status register contains information about the last
> reset's cause. Tell barebox about it.
>
> Signed-off-by: Ahmad Fatoum <[email protected]>
> ---
> arch/arm/mach-at91/at91sam9_rst.c | 30 ++++++++++++++++++++++++++++++
> 1 file changed, 30 insertions(+)
Applied, thanks
Sascha
>
> diff --git a/arch/arm/mach-at91/at91sam9_rst.c
> b/arch/arm/mach-at91/at91sam9_rst.c
> index 8f03576e698f..a61a26936f5a 100644
> --- a/arch/arm/mach-at91/at91sam9_rst.c
> +++ b/arch/arm/mach-at91/at91sam9_rst.c
> @@ -7,14 +7,42 @@
> #include <init.h>
> #include <io.h>
> #include <restart.h>
> +#include <linux/bitfield.h>
> #include <linux/clk.h>
> #include <mach/at91_rstc.h>
> +#include <reset_source.h>
>
> struct at91sam9x_rst {
> struct restart_handler restart;
> void __iomem *base;
> };
>
> +static int reasons[] = {
> + RESET_POR, /* GENERAL Both VDDCORE and VDDBU rising */
> + RESET_WKE, /* WAKEUP VDDCORE rising */
> + RESET_WDG, /* WATCHDOG Watchdog fault occurred */
> + RESET_RST, /* SOFTWARE Reset required by the software */
> + RESET_EXT, /* USER NRST pin detected low */
> +};
> +
> +static void at91sam9x_set_reset_reason(struct device_d *dev,
> + void __iomem *base)
> +{
> + enum reset_src_type type = RESET_UKWN;
> + u32 sr, rsttyp;
> +
> + sr = readl(base + AT91_RSTC_SR);
> + rsttyp = FIELD_GET(AT91_RSTC_RSTTYP, sr);
> +
> + if (rsttyp < ARRAY_SIZE(reasons))
> + type = reasons[rsttyp];
> +
> + dev_info(dev, "reset reason %s (RSTC_SR: 0x%05x)\n",
> + reset_source_to_string(type), sr);
> +
> + reset_source_set(type);
> +}
> +
> static void __noreturn at91sam9x_restart_soc(struct restart_handler *rst)
> {
> struct at91sam9x_rst *priv = container_of(rst, struct at91sam9x_rst,
> restart);
> @@ -52,6 +80,8 @@ static int at91sam9x_rst_probe(struct device_d *dev)
>
> clk_enable(clk);
>
> + at91sam9x_set_reset_reason(dev, priv->base);
> +
> priv->restart.name = "at91sam9x-rst";
> priv->restart.restart = at91sam9x_restart_soc;
>
> --
> 2.27.0
>
>
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>
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