linux-kernel - [PATCH v2] gpio: ich: add GPO

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <1371470629-6408-1-git-send-email-vdonnefort@gmail.com>
Date:	Mon, 17 Jun 2013 14:03:49 +0200
From:	Vincent Donnefort <vdonnefort@...il.com>
To:	Grant Likely <grant.likely@...retlab.ca>,
	Linus Walleij <linus.walleij@...aro.org>,
	Peter Tyser <ptyser@...-inc.com>
Cc:	linux-kernel@...r.kernel.org,
	Simon Guinot <simon.guinot@...uanux.org>,
	Vincent Donnefort <vdonnefort@...il.com>
Subject: [PATCH v2] gpio: ich: add GPO_BLINK support

This patch makes sure blink hardware is disabled for selected GPIO. Blink
hardware is controled by GPO_BLINK register and is available for GPIOs from 0
to 31.

Signed-off-by: Vincent Donnefort <vdonnefort@...il.com>
---
Changes for v2:
	- Rebased on for-next branch of linux-gpio git tree
	  git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio.git

 drivers/gpio/gpio-ich.c |    8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/gpio/gpio-ich.c b/drivers/gpio/gpio-ich.c
index e16d932..2729e3d 100644
--- a/drivers/gpio/gpio-ich.c
+++ b/drivers/gpio/gpio-ich.c
@@ -41,12 +41,14 @@ enum GPIO_REG {
 	GPIO_USE_SEL = 0,
 	GPIO_IO_SEL,
 	GPIO_LVL,
+	GPO_BLINK
 };
 
-static const u8 ichx_regs[3][3] = {
+static const u8 ichx_regs[4][3] = {
 	{0x00, 0x30, 0x40},	/* USE_SEL[1-3] offsets */
 	{0x04, 0x34, 0x44},	/* IO_SEL[1-3] offsets */
 	{0x0c, 0x38, 0x48},	/* LVL[1-3] offsets */
+	{0x18, 0x18, 0x18},	/* BLINK offset */
 };
 
 static const u8 ichx_reglen[3] = {
@@ -148,6 +150,10 @@ static int ichx_gpio_direction_input(struct gpio_chip *gpio, unsigned nr)
 static int ichx_gpio_direction_output(struct gpio_chip *gpio, unsigned nr,
 					int val)
 {
+	/* Disable blink hardware which is available for GPIOs from 0 to 31. */
+	if (nr < 32)
+		ichx_write_bit(GPO_BLINK, nr, 0, 0);
+
 	/* Set GPIO output value. */
 	ichx_write_bit(GPIO_LVL, nr, val, 0);
 
-- 
1.7.9.5

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/