shinys000114/linux
1
0
Fork 0
mirror of https://github.com/hardkernel/linux.git synced 2026-06-10 12:57:06 +09:00
Code Issues Packages Projects Releases Wiki Activity

rk2928: i2c: add check_idle && Not select i2c3 if hdmi is enable

Browse Source
This commit is contained in:
kfx
2012-08-23 11:20:04 +08:00
parent ed5c6f426a
commit 7462246e4e
2 changed files with 109 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

112
arch/arm/mach-rk2928/devices.c
View File

@@ -282,7 +282,33 @@ static struct platform_device device_lcdc = {
#ifdef CONFIG_I2C0_RK30
static int i2c0_check_idle(void)
{
return I2C_IDLE;
int sda_level, scl_level;
rk30_mux_api_set(GPIO0A0_I2C0_SCL_NAME, GPIO0A_GPIO0A0);
rk30_mux_api_set(GPIO0A1_I2C0_SDA_NAME, GPIO0A_GPIO0A1);
gpio_request(RK2928_PIN0_PA0, "i2c.0");
gpio_request(RK2928_PIN0_PA1, "i2c.0");
gpio_direction_input(RK2928_PIN0_PA0);
gpio_direction_input(RK2928_PIN0_PA1);
scl_level = gpio_get_value(RK2928_PIN0_PA0);
sda_level = gpio_get_value(RK2928_PIN0_PA1);
gpio_free(RK2928_PIN0_PA0);
gpio_free(RK2928_PIN0_PA1);
rk30_mux_api_set(GPIO0A0_I2C0_SCL_NAME, GPIO0A_I2C0_SCL);
rk30_mux_api_set(GPIO0A1_I2C0_SDA_NAME, GPIO0A_I2C0_SDA);
if(sda_level == 1 && scl_level == 1)
return I2C_IDLE;
else if(sda_level == 0 && scl_level == 1)
return I2C_SDA_LOW;
else if(sda_level == 1 && scl_level == 0)
return I2C_SCL_LOW;
else
return BOTH_LOW;
}
static struct rk30_i2c_platform_data default_i2c0_data = {
@@ -319,7 +345,33 @@ static struct platform_device device_i2c0 = {
#ifdef CONFIG_I2C1_RK30
static int i2c1_check_idle(void)
{
return I2C_IDLE;
int sda_level, scl_level;
rk30_mux_api_set(GPIO0A2_I2C1_SCL_NAME, GPIO0A_GPIO0A2);
rk30_mux_api_set(GPIO0A3_I2C1_SDA_NAME, GPIO0A_GPIO0A3);
gpio_request(RK2928_PIN0_PA2, "i2c.1");
gpio_request(RK2928_PIN0_PA3, "i2c.1");
gpio_direction_input(RK2928_PIN0_PA2);
gpio_direction_input(RK2928_PIN0_PA3);
scl_level = gpio_get_value(RK2928_PIN0_PA2);
sda_level = gpio_get_value(RK2928_PIN0_PA3);
gpio_free(RK2928_PIN0_PA2);
gpio_free(RK2928_PIN0_PA3);
rk30_mux_api_set(GPIO0A2_I2C1_SCL_NAME, GPIO0A_I2C1_SCL);
rk30_mux_api_set(GPIO0A3_I2C1_SDA_NAME, GPIO0A_I2C1_SDA);
if(sda_level == 1 && scl_level == 1)
return I2C_IDLE;
else if(sda_level == 0 && scl_level == 1)
return I2C_SDA_LOW;
else if(sda_level == 1 && scl_level == 0)
return I2C_SCL_LOW;
else
return BOTH_LOW;
}
static struct rk30_i2c_platform_data default_i2c1_data = {
@@ -356,7 +408,33 @@ static struct platform_device device_i2c1 = {
#ifdef CONFIG_I2C2_RK30
static int i2c2_check_idle(void)
{
return I2C_IDLE;
int sda_level, scl_level;
rk30_mux_api_set(GPIO2C4_LCDC0_D18_LCDC1_D18_I2C2_SDA_NAME, GPIO2C_GPIO2C4);
rk30_mux_api_set(GPIO2C5_LCDC0_D19_LCDC1_D19_I2C2_SCL_NAME, GPIO2C_GPIO2C5);
gpio_request(RK2928_PIN2_PC4, "i2c.2");
gpio_request(RK2928_PIN2_PC5, "i2c.2");
gpio_direction_input(RK2928_PIN2_PC4);
gpio_direction_input(RK2928_PIN2_PC5);
scl_level = gpio_get_value(RK2928_PIN2_PC4);
sda_level = gpio_get_value(RK2928_PIN2_PC5);
gpio_free(RK2928_PIN2_PC4);
gpio_free(RK2928_PIN2_PC5);
rk30_mux_api_set(GPIO2C4_LCDC0_D18_LCDC1_D18_I2C2_SDA_NAME, GPIO2C_I2C2_SDA);
rk30_mux_api_set(GPIO2C5_LCDC0_D19_LCDC1_D19_I2C2_SCL_NAME, GPIO2C_I2C2_SCL);
if(sda_level == 1 && scl_level == 1)
return I2C_IDLE;
else if(sda_level == 0 && scl_level == 1)
return I2C_SDA_LOW;
else if(sda_level == 1 && scl_level == 0)
return I2C_SCL_LOW;
else
return BOTH_LOW;
}
static struct rk30_i2c_platform_data default_i2c2_data = {
@@ -393,7 +471,33 @@ static struct platform_device device_i2c2 = {
#ifdef CONFIG_I2C3_RK30
static int i2c3_check_idle(void)
{
return I2C_IDLE;
int sda_level, scl_level;
rk30_mux_api_set(GPIO0A6_I2C3_SCL_HDMI_DDCSCL_NAME, GPIO0A_GPIO0A6);
rk30_mux_api_set(GPIO0A7_I2C3_SDA_HDMI_DDCSDA_NAME, GPIO0A_GPIO0A7);
gpio_request(RK2928_PIN0_PA6, "i2c.3");
gpio_request(RK2928_PIN0_PA7, "i2c.3");
gpio_direction_input(RK2928_PIN0_PA6);
gpio_direction_input(RK2928_PIN0_PA7);
scl_level = gpio_get_value(RK2928_PIN0_PA6);
sda_level = gpio_get_value(RK2928_PIN0_PA7);
gpio_free(RK2928_PIN0_PA6);
gpio_free(RK2928_PIN0_PA7);
rk30_mux_api_set(GPIO0A6_I2C3_SCL_HDMI_DDCSCL_NAME, GPIO0A_I2C3_SCL);
rk30_mux_api_set(GPIO0A7_I2C3_SDA_HDMI_DDCSDA_NAME, GPIO0A_I2C3_SDA);
if(sda_level == 1 && scl_level == 1)
return I2C_IDLE;
else if(sda_level == 0 && scl_level == 1)
return I2C_SDA_LOW;
else if(sda_level == 1 && scl_level == 0)
return I2C_SCL_LOW;
else
return BOTH_LOW;
}
static struct rk30_i2c_platform_data default_i2c3_data = {

1
drivers/i2c/busses/Kconfig
View File

@@ -893,6 +893,7 @@ if I2C_RK30
endif
config I2C3_RK30
bool "I2C3 Channel Support"
depends on !HDMI_RK2928
default y
help
This supports the use of the I2C3 channel on RK Soc.