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| author | Adrian Alonso <aalonso@freescale.com> | 2012-03-30 10:35:38 -0600 |
|---|---|---|
| committer | Adrian Alonso <aalonso@freescale.com> | 2012-04-05 10:11:06 -0500 |
| commit | e16c1bcc77ce5814c865bf1724713d735aac22ae (patch) | |
| tree | eacd9f7ac299354e7eb2c936e405131425b56b2c /board | |
| parent | 841ea64c9e35d41faee69b7bfd1b2fc3f3d23894 (diff) | |
| download | u-boot-imx-e16c1bcc77ce5814c865bf1724713d735aac22ae.zip u-boot-imx-e16c1bcc77ce5814c865bf1724713d735aac22ae.tar.gz u-boot-imx-e16c1bcc77ce5814c865bf1724713d735aac22ae.tar.bz2 | |
ENGR00176537 mx6qsabreauto: i2c3_sda route setting
* In RevB boards a steer logic circuit enables the
route path of I2C3_SDA signal and is controlled by
EIM_A24__GPIO_5_4 pad.
* Configure GPIO_5_4 as as output and enable steer logic
circuit.
Signed-off-by: Adrian Alonso <aalonso@freescale.com>
Diffstat (limited to 'board')
| -rw-r--r-- | board/freescale/mx6q_sabreauto/mx6q_sabreauto.c | 26 |
1 files changed, 24 insertions, 2 deletions
diff --git a/board/freescale/mx6q_sabreauto/mx6q_sabreauto.c b/board/freescale/mx6q_sabreauto/mx6q_sabreauto.c index 243fecb..ac8130e 100644 --- a/board/freescale/mx6q_sabreauto/mx6q_sabreauto.c +++ b/board/freescale/mx6q_sabreauto/mx6q_sabreauto.c @@ -332,16 +332,38 @@ static void setup_i2c(unsigned int module_base) if (mx6_board_is_reva()) /* GPIO_16 for I2C3_SDA */ mxc_iomux_v3_setup_pad(MX6Q_PAD_GPIO_16__I2C3_SDA); - else + else { mxc_iomux_v3_setup_pad(MX6Q_PAD_EIM_D18__I2C3_SDA); + /* EIM_A24__GPIO_5_4 steer logic enable */ + mxc_iomux_v3_setup_pad(MX6Q_PAD_EIM_A24__GPIO_5_4); + reg = readl(GPIO5_BASE_ADDR + GPIO_GDIR); + reg |= (1 << 4); + /* Set GPIO_5_4 as output */ + writel(reg, GPIO5_BASE_ADDR + GPIO_GDIR); + reg = readl(GPIO5_BASE_ADDR + GPIO_DR); + reg |= (1 << 4); + /* Enable I2C3 SDA route path */ + writel(reg, GPIO5_BASE_ADDR + GPIO_DR); + } #elif defined CONFIG_MX6DL /* GPIO_3 for I2C3_SCL */ mxc_iomux_v3_setup_pad(MX6DL_PAD_GPIO_3__I2C3_SCL); if (mx6_board_is_reva()) /* GPIO_16 for I2C3_SDA */ mxc_iomux_v3_setup_pad(MX6DL_PAD_GPIO_16__I2C3_SDA); - else + else { mxc_iomux_v3_setup_pad(MX6DL_PAD_EIM_D18__I2C3_SDA); + /* EIM_A24__GPIO_5_4 steer logic enable */ + mxc_iomux_v3_setup_pad(MX6DL_PAD_EIM_A24__GPIO_5_4); + reg = readl(GPIO5_BASE_ADDR + GPIO_GDIR); + reg |= (1 << 4); + /* Set GPIO_5_4 as output */ + writel(reg, GPIO5_BASE_ADDR + GPIO_GDIR); + reg = readl(GPIO5_BASE_ADDR + GPIO_DR); + reg |= (1 << 4); + /* Enable I2C3 SDA route path */ + writel(reg, GPIO5_BASE_ADDR + GPIO_DR); + } #endif /* Enable i2c clock */ reg = readl(CCM_BASE_ADDR + CLKCTL_CCGR2); |