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Commit 9afe6250 authored by Alexandre Belloni's avatar Alexandre Belloni Committed by Sebastian Reichel
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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: default avatarAlexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: default avatarSebastian Reichel <sebastian.reichel@collabora.com>
parent 76ee875c

drivers/power/reset/ocelot-reset.c

+12 −0
Original line number Diff line number Diff line
@@ -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");