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authorThierry Reding <treding@nvidia.com>2015-12-30 19:13:29 +0300
committerThierry Reding <treding@nvidia.com>2016-06-10 17:10:42 +0300
commitf5353c60507cb96195cd56499ee5e56a92388645 (patch)
treeb66e6fedd8f9013764add34c37300864eb6f1353 /drivers/soc
parent1a695a905c18548062509178b98bc91e67510864 (diff)
downloadlinux-f5353c60507cb96195cd56499ee5e56a92388645.tar.xz
soc/tegra: pmc: Use register definitions instead of magic values
Use register definitions for the main SoC reset operation instead of hard-coding magic values. Note that the PMC_RST_STATUS register isn't actually accessed, but since it is mentioned in a comment the definitions are added for completeness. Acked-by: Jon Hunter <jonathanh@nvidia.com> Signed-off-by: Thierry Reding <treding@nvidia.com>
Diffstat (limited to 'drivers/soc')
-rw-r--r--drivers/soc/tegra/pmc.c16
1 files changed, 13 insertions, 3 deletions
diff --git a/drivers/soc/tegra/pmc.c b/drivers/soc/tegra/pmc.c
index bb173456bbff..d13516981629 100644
--- a/drivers/soc/tegra/pmc.c
+++ b/drivers/soc/tegra/pmc.c
@@ -51,6 +51,7 @@
#define PMC_CNTRL_CPU_PWRREQ_POLARITY (1 << 15) /* CPU pwr req polarity */
#define PMC_CNTRL_CPU_PWRREQ_OE (1 << 16) /* CPU pwr req enable */
#define PMC_CNTRL_INTR_POLARITY (1 << 17) /* inverts INTR polarity */
+#define PMC_CNTRL_MAIN_RST (1 << 4)
#define DPD_SAMPLE 0x020
#define DPD_SAMPLE_ENABLE (1 << 0)
@@ -80,6 +81,14 @@
#define PMC_SENSOR_CTRL_SCRATCH_WRITE (1 << 2)
#define PMC_SENSOR_CTRL_ENABLE_RST (1 << 1)
+#define PMC_RST_STATUS 0x1b4
+#define PMC_RST_STATUS_POR 0
+#define PMC_RST_STATUS_WATCHDOG 1
+#define PMC_RST_STATUS_SENSOR 2
+#define PMC_RST_STATUS_SW_MAIN 3
+#define PMC_RST_STATUS_LP0 4
+#define PMC_RST_STATUS_AOTAG 5
+
#define IO_DPD_REQ 0x1b8
#define IO_DPD_REQ_CODE_IDLE (0 << 30)
#define IO_DPD_REQ_CODE_OFF (1 << 30)
@@ -638,9 +647,10 @@ static int tegra_pmc_restart_notify(struct notifier_block *this,
tegra_pmc_writel(value, PMC_SCRATCH0);
- value = tegra_pmc_readl(0);
- value |= 0x10;
- tegra_pmc_writel(value, 0);
+ /* reset everything but PMC_SCRATCH0 and PMC_RST_STATUS */
+ value = tegra_pmc_readl(PMC_CNTRL);
+ value |= PMC_CNTRL_MAIN_RST;
+ tegra_pmc_writel(value, PMC_CNTRL);
return NOTIFY_DONE;
}