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[10/23] mfd/db8500-prcmu: reset code retrieval

Message ID 1313137733-30914-1-git-send-email-linus.walleij@stericsson.com
State Accepted
Commit 597045de35caaef68a11b6defbb618710e1a1e52
Headers show

Commit Message

Linus Walleij Aug. 12, 2011, 8:28 a.m. UTC 
From: Sebastian Rasmussen <sebastian.rasmussen@stericsson.com>

This implements the reset code retrieval function so we can
ipso facto get to know how the system was reset.

Signed-off-by: Sebastian Rasmussen <sebastian.rasmussen@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
 drivers/mfd/db8500-prcmu.c |   11 +++++++++++
 1 files changed, 11 insertions(+), 0 deletions(-)
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Patch

diff --git a/drivers/mfd/db8500-prcmu.c b/drivers/mfd/db8500-prcmu.c
index cb58e44..6fd4e29 100644
--- a/drivers/mfd/db8500-prcmu.c
+++ b/drivers/mfd/db8500-prcmu.c
@@ -1836,6 +1836,17 @@  void db8500_prcmu_system_reset(u16 reset_code)
 }
 
 /**
+ * db8500_prcmu_get_reset_code - Retrieve SW reset reason code
+ *
+ * Retrieves the reset reason code stored by prcmu_system_reset() before
+ * last restart.
+ */
+u16 db8500_prcmu_get_reset_code(void)
+{
+	return readw(tcdm_base + PRCM_SW_RST_REASON);
+}
+
+/**
  * prcmu_reset_modem - ask the PRCMU to reset modem
  */
 void prcmu_modem_reset(void)