diff mbox

[3.16.y-ckt,stable] Patch "ARM: imx6sx: Set PLL2 as parent of QSPI clocks" has been added to staging queue

Message ID 1422282715-7624-1-git-send-email-luis.henriques@canonical.com
State New
Headers show

Commit Message

Luis Henriques Jan. 26, 2015, 2:31 p.m. UTC
This is a note to let you know that I have just added a patch titled

    ARM: imx6sx: Set PLL2 as parent of QSPI clocks

to the linux-3.16.y-queue branch of the 3.16.y-ckt extended stable tree 
which can be found at:

 http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.16.y-queue

This patch is scheduled to be released in version 3.16.7-ckt5.

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.16.y-ckt tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Luis

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From adbc784cb150ec8c33b3bd84d16d24231a70b84e Mon Sep 17 00:00:00 2001
From: Fabio Estevam <fabio.estevam@freescale.com>
Date: Tue, 16 Dec 2014 17:30:28 -0200
Subject: ARM: imx6sx: Set PLL2 as parent of QSPI clocks

commit 7c168ed898931f6c3314d696e63cf993378ca192 upstream.

The default qspi2_clk_sel field of register CCM_CS2CDR contains '110' which is
marked as 'reserved', so we can't rely on the default value.

Provide a proper parent for QSPI clocks to avoid a kernel oops:

[    1.037920] Division by zero in kernel.
[    1.041807] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.18.0-rc7-next-20141204-00002-g5aa23e1 #2143
[    1.050967] Hardware name: Freescale i.MX6 SoloX (Device Tree)
[    1.056853] Backtrace:
[    1.059360] [<80011ea0>] (dump_backtrace) from [<8001203c>] (show_stack+0x18/0x1c)
[    1.066982]  r6:00000000 r5:00000000 r4:00000000 r3:00000000
[    1.072754] [<80012024>] (show_stack) from [<806b7100>] (dump_stack+0x88/0xa4)
[    1.080038] [<806b7078>] (dump_stack) from [<80011d20>] (__div0+0x18/0x20)
[    1.086958]  r5:be018500 r4:be017c00
[    1.090600] [<80011d08>] (__div0) from [<802aa418>] (Ldiv0+0x8/0x10)
[    1.097012] [<80504fbc>] (clk_divider_set_rate) from [<80503ddc>] (clk_change_rate+0x14c/0x17c)
[    1.105759]  r7:00000000 r6:00000000 r5:be018500 r4:00000000
[    1.111516] [<80503c90>] (clk_change_rate) from [<80503ea0>] (clk_set_rate+0x94/0x98)
[    1.119391]  r8:be7e0368 r7:00000000 r6:be11a000 r5:be018500 r4:00000000 r3:00000000
[    1.127290] [<80503e0c>] (clk_set_rate) from [<80410558>] (fsl_qspi_probe+0x23c/0x75c)
[    1.135260]  r5:be11a010 r4:be350010
[    1.138900] [<8041031c>] (fsl_qspi_probe) from [<80385a18>] (platform_drv_probe+0x50/0xac)

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 arch/arm/mach-imx/clk-imx6sx.c | 3 +++
 1 file changed, 3 insertions(+)

--
2.1.4
diff mbox

Patch

diff --git a/arch/arm/mach-imx/clk-imx6sx.c b/arch/arm/mach-imx/clk-imx6sx.c
index 72f8902235d1..ac8ea72f28ab 100644
--- a/arch/arm/mach-imx/clk-imx6sx.c
+++ b/arch/arm/mach-imx/clk-imx6sx.c
@@ -515,6 +515,9 @@  static void __init imx6sx_clocks_init(struct device_node *ccm_node)
 	clk_set_parent(clks[IMX6SX_CLK_GPU_CORE_SEL], clks[IMX6SX_CLK_PLL3_PFD0]);
 	clk_set_parent(clks[IMX6SX_CLK_GPU_AXI_SEL], clks[IMX6SX_CLK_PLL3_PFD0]);

+	clk_set_parent(clks[IMX6SX_CLK_QSPI1_SEL], clks[IMX6SX_CLK_PLL2_BUS]);
+	clk_set_parent(clks[IMX6SX_CLK_QSPI2_SEL], clks[IMX6SX_CLK_PLL2_BUS]);
+
 	/* Set initial power mode */
 	imx6q_set_lpm(WAIT_CLOCKED);