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Date: Wed, 9 Mar 2016 18:16:59 -0800 From: Stefan Agner <stefan@...er.ch> To: shawnguo@...nel.org, mturquette@...libre.com, sboyd@...eaurora.org Cc: kernel@...gutronix.de, sergeimir@...raft.com, tglx@...utronix.de, jason@...edaemon.net, marc.zyngier@....com, robh+dt@...nel.org, pawel.moll@....com, mark.rutland@....com, ijc+devicetree@...lion.org.uk, galak@...eaurora.org, devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, linux-clk@...r.kernel.org, Stefan Agner <stefan@...er.ch> Subject: [PATCH 18/18] ARM: vf610: PM: enable SNVS access 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@...er.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
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