[PATCH 18/18] ARM: vf610: PM: enable SNVS access
From: stefan@agner.ch (Stefan Agner)
Date: 2016-03-10 02:18:12
Also in:
linux-clk, linux-devicetree, lkml
Subsystem:
arm port, arm/freescale vybrid arm architecture, the rest · Maintainers:
Russell King, Frank Li, Sascha Hauer, Linus Torvalds
Restore access to SNVS which seems to be done by the boot ROM on normal boot. This is required for RTC wakeup not ending up in a interrupt storm, since the SNVS RTC driver can not acknowledge the wakeup alarm without write access. Signed-off-by: Stefan Agner <stefan@agner.ch> --- arch/arm/mach-imx/suspend-vf610.S | 11 +++++++++++ 1 file changed, 11 insertions(+)
diff --git a/arch/arm/mach-imx/suspend-vf610.S b/arch/arm/mach-imx/suspend-vf610.S
index 09ad246..6df0622 100644
--- a/arch/arm/mach-imx/suspend-vf610.S
+++ b/arch/arm/mach-imx/suspend-vf610.S@@ -429,6 +429,17 @@ ddrmc_initializing: ldr r5, =0x0 str r5, [r11, #VF610_GPC_LPMR] + /* Enable SNVS */ + ldr r3, [r0, #PM_INFO_VF610_CCM_P_OFFSET] + ldr r4, [r3, #VF610_CCM_CCGR6] + orr r4, r4, #0x0000C000 + str r4, [r3, #VF610_CCM_CCGR6] + + /* Enable SNVS access (RTC) */ + ldr r11, =0x400a7000 + ldr r4, =0x80000100 + str r4, [r11, #0x4] + /* get physical resume address from pm_info. */ ldr lr, [r0, #PM_INFO_RESUME_ADDR_OFFSET]
--
2.7.2