From 4670df831cb479ba57dd0fa0b8a9eb88cc7129be Mon Sep 17 00:00:00 2001 From: Ben Gardner Date: Tue, 4 Dec 2007 23:45:24 -0800 Subject: gpio_cs5535: disable AUX on output The AMD CS5535/CS5536 GPIO has two alternate output modes: AUX-1 and AUX-2. When either AUX is enabled, the cs5535_gpio driver cannot control the output. Some BIOS code for the Geode processor enables AUX-1 for GPIO-1, which configures it as the PC BEEP output. This patch will disable AUX-1 and AUX-2 when the user enables output. Signed-of-by: Ben Gardner Cc: Richard Knutsson Cc: David Brownell Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/char/cs5535_gpio.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/char/cs5535_gpio.c b/drivers/char/cs5535_gpio.c index fe6d2407bae..c2d23cae951 100644 --- a/drivers/char/cs5535_gpio.c +++ b/drivers/char/cs5535_gpio.c @@ -104,6 +104,11 @@ static ssize_t cs5535_gpio_write(struct file *file, const char __user *data, for (j = 0; j < ARRAY_SIZE(rm); j++) { if (c == rm[j].on) { outl(m1, base + rm[j].wr_offset); + /* If enabling output, turn off AUX 1 and AUX 2 */ + if (c == 'O') { + outl(m0, base + 0x10); + outl(m0, base + 0x14); + } break; } else if (c == rm[j].off) { outl(m0, base + rm[j].wr_offset); -- cgit v1.2.2