lkml.org 
[lkml]   [2018]   [Nov]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH] power: reset: ocelot: switch the SI to boot mode
Date
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>
---
drivers/power/reset/ocelot-reset.c | 12 ++++++++++++
1 file changed, 12 insertions(+)

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");
--
2.19.1
\
 
 \ /
  Last update: 2018-11-09 20:58    [W:0.026 / U:2.564 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site