From: Russell King - ARM Linux <linux@arm.linux.org.uk>
To: linux-arm-kernel@lists.infradead.org,
linux-samsung-soc@vger.kernel.org, linux-omap@vger.kernel.org
Subject: [PATCH 22/25] ARM: pm: omap34xx: remove misleading comment and use of r9
Date: Thu, 23 Jun 2011 20:16:28 +0100 [thread overview]
Message-ID: <E1QZpO8-0005np-CU@rmk-PC.arm.linux.org.uk> (raw)
In-Reply-To: <20110623190900.GH9449@n2100.arm.linux.org.uk>
The code alludes to r9 being used to indicate what was lost over the
suspend/resume transition. However, although r9 is set, it is never
actually used.
Also, the comments before the code (which refer to the value of r9)
and the comments against the assignment of r9 contradict each other,
so just remove them to avoid confusion.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---
arch/arm/mach-omap2/sleep34xx.S | 9 ++-------
1 files changed, 2 insertions(+), 7 deletions(-)
diff --git a/arch/arm/mach-omap2/sleep34xx.S b/arch/arm/mach-omap2/sleep34xx.S
index 9551c7d..12e9da2 100644
--- a/arch/arm/mach-omap2/sleep34xx.S
+++ b/arch/arm/mach-omap2/sleep34xx.S
@@ -381,18 +381,13 @@ restore_3630:
restore:
/*
- * Check what was the reason for mpu reset and store the reason in r9:
- * 0 - No context lost
- * 1 - Only L1 and logic lost
- * 2 - Only L2 lost - In this case, we wont be here
- * 3 - Both L1 and L2 lost
+ * Read the pwstctrl register to check the reason for mpu reset.
+ * This tells us what was lost.
*/
ldr r1, pm_pwstctrl_mpu
ldr r2, [r1]
and r2, r2, #0x3
cmp r2, #0x0 @ Check if target power state was OFF or RET
- moveq r9, #0x3 @ MPU OFF => L1 and L2 lost
- movne r9, #0x1 @ Only L1 and L2 lost => avoid L2 invalidation
bne logic_l1_restore
ldr r0, l2dis_3630
--
1.7.4.4
next prev parent reply other threads:[~2011-06-23 19:16 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-06-23 19:09 [PATCH 00/25] Re-jig cpu_suspend for a saner calling convention Russell King - ARM Linux
2011-06-23 19:09 ` [PATCH 01/25] ARM: pm: ensure ARMv7 CPUs save and restore the TLS register Russell King - ARM Linux
2011-06-23 19:09 ` [PATCH 02/25] ARM: pm: arrange for cpu_proc_init() to be called on resume Russell King - ARM Linux
2011-06-23 19:10 ` [PATCH 03/25] ARM: pm: sa1100: no need to re-enable clock switching Russell King - ARM Linux
2011-06-23 19:10 ` [PATCH 04/25] ARM: pm: make MULTI_CPU and !MULTI_CPU resume paths the same Russell King - ARM Linux
2011-06-23 19:10 ` [PATCH 05/25] ARM: pm: move return address (for cpu_resume) to top of stack Russell King - ARM Linux
2011-06-23 19:11 ` [PATCH 06/25] ARM: pm: extract common code from MULTI_CPU/!MULTI_CPU paths Russell King - ARM Linux
2011-06-23 19:11 ` [PATCH 07/25] ARM: pm: preserve r4 - r11 across a suspend Russell King - ARM Linux
2011-06-23 19:11 ` [PATCH 08/25] ARM: pm: reallocate registers to avoid r2, r3 Russell King - ARM Linux
2011-06-23 19:12 ` [PATCH 09/25] ARM: pm: rejig suspend follow-on function calling convention Russell King - ARM Linux
2011-06-23 19:12 ` [PATCH 10/25] ARM: pm: move sa1100 to use proper suspend func arg0 Russell King - ARM Linux
2011-06-23 19:12 ` [PATCH 11/25] ARM: pm: convert cpu_suspend() to a normal function Russell King - ARM Linux
2011-06-23 19:13 ` [PATCH 12/25] ARM: pm: move cpu_init() call into core code Russell King - ARM Linux
2011-06-23 19:13 ` [PATCH 13/25] ARM: pm: sa1100: move cpu_suspend into C code Russell King - ARM Linux
2011-06-23 19:13 ` [PATCH 14/25] ARM: pm: plat-s3c24xx: cleanup s3c_cpu_save Russell King - ARM Linux
2011-06-24 6:48 ` Kukjin Kim
2011-06-23 19:14 ` [PATCH 15/25] ARM: pm: mach-s5pv210: " Russell King - ARM Linux
2011-06-23 19:14 ` [PATCH 16/25] ARM: pm: mach-exynos4: " Russell King - ARM Linux
2011-06-23 19:14 ` [PATCH 17/25] ARM: pm: mach-s3c64xx: " Russell King - ARM Linux
2011-06-23 19:15 ` [PATCH 18/25] ARM: pm: samsung: move cpu_suspend into C code Russell King - ARM Linux
2011-06-23 19:15 ` [PATCH 19/25] ARM: pm: samsung: no need to call flush_cache_all() Russell King - ARM Linux
2011-06-23 19:15 ` [PATCH 20/25] ARM: pm: pxa: move cpu_suspend into C code Russell King - ARM Linux
2011-06-23 19:16 ` [PATCH 21/25] ARM: pm: omap34xx: no need to save all registers in sleep34xx.S Russell King - ARM Linux
2011-06-23 19:16 ` Russell King - ARM Linux [this message]
2011-06-23 19:16 ` [PATCH 23/25] ARM: pm: omap34xx: convert to generic suspend/resume support Russell King - ARM Linux
2011-06-24 7:37 ` Jean Pihet
2011-06-24 7:42 ` Russell King - ARM Linux
2011-06-23 19:17 ` [PATCH 24/25] ARM: pm: hide 1st and 2nd arguments to cpu_suspend from platform code Russell King - ARM Linux
2011-06-23 21:27 ` Kevin Hilman
2011-06-23 19:17 ` [PATCH 25/25] ARM: pm: ensure our temporary page table entry is removed from the TLB Russell King - ARM Linux
2011-06-23 22:14 ` [PATCH 00/25] Re-jig cpu_suspend for a saner calling convention Kevin Hilman
2011-06-24 7:43 ` Jean Pihet
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