diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.4/0429-fix-auto-sense-in-lirc_rpi-driver.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.4/0429-fix-auto-sense-in-lirc_rpi-driver.patch | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.4/0429-fix-auto-sense-in-lirc_rpi-driver.patch b/target/linux/brcm2708/patches-4.4/0429-fix-auto-sense-in-lirc_rpi-driver.patch new file mode 100644 index 0000000000..4857620a09 --- /dev/null +++ b/target/linux/brcm2708/patches-4.4/0429-fix-auto-sense-in-lirc_rpi-driver.patch @@ -0,0 +1,45 @@ +From 7e5bbf1a74ec6bbaa25fe6cadf715946e3e4d692 Mon Sep 17 00:00:00 2001 +From: Ingo Kresse <ingo.kresse@gmail.com> +Date: Fri, 29 Jul 2016 22:50:21 +0000 +Subject: [PATCH] fix auto-sense in lirc_rpi driver + +On a Raspberry Pi 2, the lirc_rpi driver might receive spurious +interrupts and change it's low-active / high-active setting. +When this happens, the IR remote control stops working. + +This patch disables this auto-detection if the 'sense' parameter +was set in the device tree, making the driver robust to such +spurious interrupts. +--- + drivers/staging/media/lirc/lirc_rpi.c | 6 +++++- + 1 file changed, 5 insertions(+), 1 deletion(-) + +--- a/drivers/staging/media/lirc/lirc_rpi.c ++++ b/drivers/staging/media/lirc/lirc_rpi.c +@@ -79,6 +79,7 @@ static bool invert = 0; + + struct gpio_chip *gpiochip; + static int irq_num; ++static int auto_sense = 1; + + /* forward declarations */ + static long send_pulse(unsigned long length); +@@ -279,7 +280,9 @@ static irqreturn_t irq_handler(int i, vo + * detecting pulse while this + * MUST be a space! + */ +- sense = sense ? 0 : 1; ++ if (auto_sense) { ++ sense = sense ? 0 : 1; ++ } + } + } else { + data = (int) (deltv*1000000 + +@@ -417,6 +420,7 @@ static int init_port(void) + printk(KERN_INFO LIRC_DRIVER_NAME + ": manually using active %s receiver on GPIO pin %d\n", + sense ? "low" : "high", gpio_in_pin); ++ auto_sense = 0; + } + + return 0; |