From: Kevin Hilman <khilman@ti.com>
To: linux-omap@vger.kernel.org,
Grant Likely <grant.likely@secretlab.ca>,
Linus Walleij <linus.walleij@stericsson.com>
Cc: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 01/14] GPIO: OMAP: _clear_gpio_irqbank: fix flushing of posted write
Date: Fri, 20 May 2011 17:14:44 +0200 [thread overview]
Message-ID: <1305904497-26013-2-git-send-email-khilman@ti.com> (raw)
In-Reply-To: <1305904497-26013-1-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>
---
drivers/gpio/gpio_omap.c | 3 +--
1 files changed, 1 insertions(+), 2 deletions(-)
diff --git a/drivers/gpio/gpio_omap.c b/drivers/gpio/gpio_omap.c
index 5d55886..b414644 100644
--- a/drivers/gpio/gpio_omap.c
+++ b/drivers/gpio/gpio_omap.c
@@ -708,12 +708,11 @@ 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)
--
1.7.3.4
next prev parent reply other threads:[~2011-05-20 15:15 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-05-20 15:14 [PATCH 00/14] GPIO: OMAP: first round of cleanup Kevin Hilman
2011-05-20 15:14 ` Kevin Hilman [this message]
2011-05-20 15:14 ` [PATCH 02/14] GPIO: OMAP: remove MPUIO handling from _clear_gpio_irqbank() Kevin Hilman
2011-05-20 15:14 ` [PATCH 03/14] GPIO: OMAP: move bank width into struct gpio_bank Kevin Hilman
2011-05-20 15:14 ` [PATCH 04/14] GPIO: OMAP: _get_gpio_irqbank_mask: replace hard-coded mask with bank->width Kevin Hilman
2011-05-20 15:14 ` [PATCH 05/14] GPIO: OMAP: replace get_gpio_index() by using bank width Kevin Hilman
2011-05-20 15:14 ` [PATCH 06/14] GPIO: OMAP: remove get_gpio_bank() Kevin Hilman
2011-05-20 15:14 ` [PATCH 07/14] GPIO: OMAP: consolidate direction, input, output, remove #ifdefs Kevin Hilman
2011-05-20 15:14 ` [PATCH 08/14] GPIO: OMAP: consolidate IRQ status handling, " Kevin Hilman
2011-05-20 15:14 ` [PATCH 09/14] GPIO: OMAP: conslidate enable/disable of GPIO IRQs, remove ifdefs Kevin Hilman
2011-05-20 15:14 ` [PATCH 10/14] GPIO: OMAP: convert MPUIO IRQ over to generic irq_chip Kevin Hilman
2011-05-20 15:14 ` [PATCH 11/14] GPIO: OMAP: remove useless gpio_valid() & check_gpio() checks Kevin Hilman
2011-05-20 15:14 ` [PATCH 12/14] GPIO: OMAP: cleanup _set_gpio_wakeup(), remove ifdefs Kevin Hilman
2011-05-20 15:14 ` [PATCH 13/14] GPIO: OMAP: debounce remove SoC specific registers, use pdata Kevin Hilman
2011-05-20 15:14 ` [PATCH 14/14] GPIO: OMAP: cleanup show revision, remove cpu_is checks, display only once Kevin Hilman
2011-05-22 6:28 ` [PATCH 00/14] GPIO: OMAP: first round of cleanup Jean-Christophe PLAGNIOL-VILLARD
2011-05-27 3:24 ` Grant Likely
2011-05-27 15:49 ` Kevin Hilman
2011-06-16 16:07 ` Kevin Hilman
2011-06-16 16:26 ` Grant Likely
2011-06-16 18:16 ` Kevin Hilman
2011-06-16 19:32 ` Grant Likely
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