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From: Kevin Hilman <khilman@ti.com>
To: linux-omap@vger.kernel.org, linux-arm-kernel@lists.infradead.org
Cc: charu@ti.com
Subject: [PATCH 01/15] OMAP: GPIO: _clear_gpio_irqbank: fix flushing of posted write
Date: Fri, 22 Apr 2011 16:01:53 -0700	[thread overview]
Message-ID: <1303513327-14532-2-git-send-email-khilman@ti.com> (raw)
In-Reply-To: <1303513327-14532-1-git-send-email-khilman@ti.com>

In commit 78a1a6d3411de1a8b0dc1cb92754b5f12f251912 (ARM: OMAP4: Update
the GPIO support) braces were mistakenly added to included the
register read-back inside the cpu_is_* checking.

Remove the braces, ensuring that a register read-back is done, even
when the IRQSTATUS2 register is not written.

Note that the register read-back might be IRQSTATUS1 or IRQSTATUS2
depending on the CPU, but a read-back of any register in that region
will cause a flush of the posted writes.

Signed-off-by: Kevin Hilman <khilman@ti.com>
---
 arch/arm/plat-omap/gpio.c |    3 +--
 1 files changed, 1 insertions(+), 2 deletions(-)

diff --git a/arch/arm/plat-omap/gpio.c b/arch/arm/plat-omap/gpio.c
index d2adcdd..fe6971a 100644
--- a/arch/arm/plat-omap/gpio.c
+++ b/arch/arm/plat-omap/gpio.c
@@ -813,12 +813,11 @@ static void _clear_gpio_irqbank(struct gpio_bank *bank, int gpio_mask)
 	else if (cpu_is_omap44xx())
 		reg = bank->base + OMAP4_GPIO_IRQSTATUS1;
 
-	if (cpu_is_omap24xx() || cpu_is_omap34xx() || cpu_is_omap44xx()) {
+	if (cpu_is_omap24xx() || cpu_is_omap34xx() || cpu_is_omap44xx())
 		__raw_writel(gpio_mask, reg);
 
 	/* Flush posted write for the irq status to avoid spurious interrupts */
 	__raw_readl(reg);
-	}
 }
 
 static inline void _clear_gpio_irqstatus(struct gpio_bank *bank, int gpio)
-- 
1.7.4


  reply	other threads:[~2011-04-22 23:00 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-04-22 23:01 [PATCH 00/15] OMAP: GPIO: clean up: pass register offsets via pdata Kevin Hilman
2011-04-22 23:01 ` Kevin Hilman [this message]
2011-04-22 23:01 ` [PATCH 02/15] OMAP: GPIO: remove MPUIO handling from _clear_gpio_irqbank() Kevin Hilman
2011-04-25 13:48   ` Varadarajan, Charulatha
2011-05-03 16:27     ` Kevin Hilman
2011-04-22 23:01 ` [PATCH 03/15] OMAP: GPIO: move bank width into struct gpio_bank Kevin Hilman
2011-04-22 23:01 ` [PATCH 04/15] OMAP: GPIO: _get_gpio_irqbank_mask: replace hard-coded mask with bank->width Kevin Hilman
2011-04-22 23:01 ` [PATCH 05/15] OMAP: GPIO: replace get_gpio_index() by using bank width Kevin Hilman
2011-04-22 23:01 ` [PATCH 06/15] OMAP: GPIO: remove get_gpio_bank() Kevin Hilman
2011-04-22 23:01 ` [PATCH 07/15] OMAP: GPIO: move register offset defines into gpio.h Kevin Hilman
2011-04-22 23:02 ` [PATCH 08/15] OMAP: GPIO: consolidate direction, input, output, remove #ifdefs Kevin Hilman
2011-04-22 23:02 ` [PATCH 09/15] OMAP: GPIO: consolidate IRQ status handling, " Kevin Hilman
2011-04-26 12:43   ` Varadarajan, Charulatha
2011-04-22 23:02 ` [PATCH 10/15] OMAP: GPIO: conslidate enable/disable of GPIO IRQs, remove ifdefs Kevin Hilman
2011-04-26 12:33   ` Varadarajan, Charulatha
2011-04-22 23:02 ` [PATCH 11/15] OMAP: GPIO: convert MPUIO IRQ over to generic irq_chip Kevin Hilman
2011-04-26 12:02   ` Varadarajan, Charulatha
2011-04-22 23:02 ` [PATCH 12/15] OMAP: GPIO: remove useless gpio_valid() & check_gpio() checks Kevin Hilman
2011-04-22 23:02 ` [PATCH 13/15] OMAP: GPIO: cleanup _set_gpio_wakeup(), remove ifdefs Kevin Hilman
2011-04-26 14:44   ` Varadarajan, Charulatha
2011-05-03 16:35     ` Kevin Hilman
2011-04-22 23:02 ` [PATCH 14/15] OMAP: GPIO: debounce remove SoC specific registers, use pdata Kevin Hilman
2011-04-22 23:02 ` [PATCH 15/15] OMAP: GPIO: cleanup show revision, remove cpu_is checks, display only once Kevin Hilman
2011-04-26 11:48   ` Varadarajan, Charulatha
2011-05-03 16:38     ` Kevin Hilman
2011-05-03 23:59       ` Kevin Hilman

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