diff options
| author | Alexandre Belloni <alexandre.belloni@bootlin.com> | 2018-11-09 22:57:00 +0300 |
|---|---|---|
| committer | Sebastian Reichel <sebastian.reichel@collabora.com> | 2018-12-06 00:40:25 +0300 |
| commit | 9afe62509b329dbd973b8fdcdf168ddc5b5098cb (patch) | |
| tree | 5f88667a6a74b54ad5b7162fc5fe9329b04208af /drivers/power/reset | |
| parent | 76ee875c2f48c57cbafa35d9c3b34e7202a45a83 (diff) | |
| download | linux-9afe62509b329dbd973b8fdcdf168ddc5b5098cb.tar.xz | |
power: reset: ocelot: switch the SI to boot mode
Switch the SI to boot mode so on a warm reboot, the SI is able to access
the flash.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Diffstat (limited to 'drivers/power/reset')
| -rw-r--r-- | drivers/power/reset/ocelot-reset.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/power/reset/ocelot-reset.c b/drivers/power/reset/ocelot-reset.c index 5a13a5cc8188..419952c61fd0 100644 --- a/drivers/power/reset/ocelot-reset.c +++ b/drivers/power/reset/ocelot-reset.c @@ -26,6 +26,13 @@ struct ocelot_reset_context { #define SOFT_CHIP_RST BIT(0) +#define ICPU_CFG_CPU_SYSTEM_CTRL_GENERAL_CTRL 0x24 +#define IF_SI_OWNER_MASK GENMASK(1, 0) +#define IF_SI_OWNER_SISL 0 +#define IF_SI_OWNER_SIBM 1 +#define IF_SI_OWNER_SIMC 2 +#define IF_SI_OWNER_OFFSET 4 + static int ocelot_restart_handle(struct notifier_block *this, unsigned long mode, void *cmd) { @@ -37,6 +44,11 @@ static int ocelot_restart_handle(struct notifier_block *this, regmap_update_bits(ctx->cpu_ctrl, ICPU_CFG_CPU_SYSTEM_CTRL_RESET, CORE_RST_PROTECT, 0); + /* Make the SI back to boot mode */ + regmap_update_bits(ctx->cpu_ctrl, ICPU_CFG_CPU_SYSTEM_CTRL_GENERAL_CTRL, + IF_SI_OWNER_MASK << IF_SI_OWNER_OFFSET, + IF_SI_OWNER_SIBM << IF_SI_OWNER_OFFSET); + writel(SOFT_CHIP_RST, ctx->base); pr_emerg("Unable to restart system\n"); |