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authorAllen Martin2012-11-01 13:41:16 +0000
committerTom Warren2012-11-19 08:15:41 -0700
commit1ed0b51b7d58bfcf1901005fb98591bbdb9e30e3 (patch)
tree817a7792434b5a59d772863cc55d4b5a5d750840
parent7155dc97f62a7bb3c64eee0a643c8e329abe9f3c (diff)
tegra: add CONSOLE_MUX support to tegra-kbc
Add support for CONSOLE_MUX to tegra-kbc driver. This requires adding a flag to struct keyb to know the driver has already been initialized so if we try to initialize it again we can just return success. Also call into iomux_doenv() from drv_keyboard_init to re-evaluate the stdin string. Signed-off-by: Allen Martin <amartin@nvidia.com> Signed-off-by: Tom Warren <twarren@nvidia.com>
-rw-r--r--drivers/input/tegra-kbc.c18
1 files changed, 17 insertions, 1 deletions
diff --git a/drivers/input/tegra-kbc.c b/drivers/input/tegra-kbc.c
index ab7a9e33ee0..88471d3edf2 100644
--- a/drivers/input/tegra-kbc.c
+++ b/drivers/input/tegra-kbc.c
@@ -63,6 +63,7 @@ static struct keyb {
struct kbc_tegra *kbc; /* tegra keyboard controller */
unsigned char inited; /* 1 if keyboard has been inited */
unsigned char first_scan; /* 1 if this is our first key scan */
+ unsigned char created; /* 1 if driver has been created */
/*
* After init we must wait a short time before polling the keyboard.
@@ -306,6 +307,10 @@ static void tegra_kbc_open(void)
*/
static int init_tegra_keyboard(void)
{
+ /* check if already created */
+ if (config.created)
+ return 0;
+
#ifdef CONFIG_OF_CONTROL
int node;
@@ -349,6 +354,7 @@ static int init_tegra_keyboard(void)
config_kbc_gpio(config.kbc);
tegra_kbc_open();
+ config.created = 1;
debug("%s: Tegra keyboard ready\n", __func__);
return 0;
@@ -357,6 +363,8 @@ static int init_tegra_keyboard(void)
int drv_keyboard_init(void)
{
struct stdio_dev dev;
+ char *stdinname = getenv("stdin");
+ int error;
if (input_init(&config.input, 0)) {
debug("%s: Cannot set up input\n", __func__);
@@ -372,5 +380,13 @@ int drv_keyboard_init(void)
dev.start = init_tegra_keyboard;
/* Register the device. init_tegra_keyboard() will be called soon */
- return input_stdio_register(&dev);
+ error = input_stdio_register(&dev);
+ if (error)
+ return error;
+#ifdef CONFIG_CONSOLE_MUX
+ error = iomux_doenv(stdin, stdinname);
+ if (error)
+ return error;
+#endif
+ return 0;
}