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Koen Kooi
46 lines
1.8 KiB
Diff
46 lines
1.8 KiB
Diff
From f54325009439b13e234374856057227edc00373c Mon Sep 17 00:00:00 2001
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From: Santosh Shilimkar <santosh.shilimkar@ti.com>
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Date: Sat, 9 Jul 2011 20:42:59 -0600
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Subject: [PATCH 065/149] OMAP4: clock data: Keep GPMC clocks always enabled and hardware managed
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On OMAP4, CPU accesses on unmapped addresses are redirected to GPMC by
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L3 interconnect. Because of CPU speculative nature, such accesses are
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possible which can lead to indirect access to GPMC and if it's clock is
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not running, it can result in hang/abort on the platform.
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Above makes access to GPMC unpredictable during the execution, so it's
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module mode needs to be kept under hardware control instead of software
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control.
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Since the auto gating is supported for GPMC, there isn't any power impact
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because of this change.
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The issue was un-covered with security middleware running along with HLOS.
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In this case GPMC had a valid MMU descriptor on secure side where as HLOS
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didn't map the GMPC because it isn't being used.
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Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
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[b-cousson@ti.com: Update subject and fix typos in the changelog]
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Signed-off-by: Benoit Cousson <b-cousson@ti.com>
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Cc: Kevin Hilman <khilman@ti.com>
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Cc: Rajendra Nayak <rnayak@ti.com>
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Signed-off-by: Paul Walmsley <paul@pwsan.com>
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---
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arch/arm/mach-omap2/clock44xx_data.c | 1 +
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1 files changed, 1 insertions(+), 0 deletions(-)
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diff --git a/arch/arm/mach-omap2/clock44xx_data.c b/arch/arm/mach-omap2/clock44xx_data.c
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index 7a0b112..2578820 100644
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--- a/arch/arm/mach-omap2/clock44xx_data.c
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+++ b/arch/arm/mach-omap2/clock44xx_data.c
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@@ -1605,6 +1605,7 @@ static struct clk gpmc_ick = {
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.ops = &clkops_omap2_dflt,
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.enable_reg = OMAP4430_CM_L3_2_GPMC_CLKCTRL,
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.enable_bit = OMAP4430_MODULEMODE_HWCTRL,
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+ .flags = ENABLE_ON_INIT,
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.clkdm_name = "l3_2_clkdm",
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.parent = &l3_div_ck,
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.recalc = &followparent_recalc,
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--
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1.7.2.5
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