From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stefan Agner Subject: [PATCH 18/18] ARM: vf610: PM: enable SNVS access Date: Wed, 9 Mar 2016 18:16:59 -0800 Message-ID: <1457576219-7971-19-git-send-email-stefan@agner.ch> References: <1457576219-7971-1-git-send-email-stefan@agner.ch> Return-path: In-Reply-To: <1457576219-7971-1-git-send-email-stefan@agner.ch> Sender: linux-kernel-owner@vger.kernel.org To: shawnguo@kernel.org, mturquette@baylibre.com, sboyd@codeaurora.org Cc: kernel@pengutronix.de, sergeimir@emcraft.com, tglx@linutronix.de, jason@lakedaemon.net, marc.zyngier@arm.com, robh+dt@kernel.org, pawel.moll@arm.com, mark.rutland@arm.com, ijc+devicetree@hellion.org.uk, galak@codeaurora.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-clk@vger.kernel.org, Stefan Agner List-Id: devicetree@vger.kernel.org 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 --- 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