From: Wolfram Sang <wsa+renesas@xxxxxxxxxxxxxxxxxxxx>
Other Gen3 SoCs do this in the bootloader. Maybe R-Car V3U and S4-8 will
also later? For now, add it so we can properly reboot via remote.
Signed-off-by: Wolfram Sang <wsa+renesas@xxxxxxxxxxxxxxxxxxxx>
[geert: Generalize for R-Car Gen4]
Signed-off-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
---
Not intended for upstream merge.
v2:
- Generalize for R-Car Gen4
---
drivers/soc/renesas/rcar-rst.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/drivers/soc/renesas/rcar-rst.c b/drivers/soc/renesas/rcar-rst.c
index 4d293eb2d8f315d9..c9f2910361255fc5 100644
--- a/drivers/soc/renesas/rcar-rst.c
+++ b/drivers/soc/renesas/rcar-rst.c
@@ -12,6 +12,7 @@
#define WDTRSTCR_RESET 0xA55A0002
#define WDTRSTCR 0x0054
+#define GEN4_WDTRSTCR 0x0010
#define CR7BAR 0x0070
#define CR7BAREN BIT(4)
@@ -27,6 +28,12 @@ static int rcar_rst_enable_wdt_reset(void __iomem *base)
return 0;
}
+static int rcar_rst_gen4_enable_wdt_reset(void __iomem *base)
+{
+ iowrite32(WDTRSTCR_RESET, base + GEN4_WDTRSTCR);
+ return 0;
+}
+
/*
* Most of the R-Car Gen3 SoCs have an ARM Realtime Core.
* Firmware boot address has to be set in CR7BAR before
@@ -68,6 +75,7 @@ static const struct rst_config rcar_rst_gen3 __initconst = {
static const struct rst_config rcar_rst_gen4 __initconst = {
.modemr = 0x00, /* MODEMR0 and it has CPG related bits */
+ .configure = rcar_rst_gen4_enable_wdt_reset,
};
static const struct of_device_id rcar_rst_matches[] __initconst = {
--
2.25.1
