leandrof/u-boot
1
0
Fork 1
Code Issues Pull Requests Packages Projects Releases Wiki Activity

arm, imx6, i2c: add I2C4 for MX6DL

Browse Source 
add I2C4 modul for MX6DL based boards.

Signed-off-by: Heiko Schocher <hs@denx.de>
This commit is contained in:
Heiko Schocher
2015-05-18 10:56:24 +02:00
committed by Stefano Babic
parent ab87fc6bbd
commit 21a26940f9
5 changed files with 32 additions and 12 deletions
Download Patch File Download Diff File Expand all files Collapse all files

33
arch/arm/cpu/armv7/mx6/clock.c
View File

@@ -140,23 +140,34 @@ int enable_usdhc_clk(unsigned char enable, unsigned bus_num)
#endif
#ifdef CONFIG_SYS_I2C_MXC
/* i2c_num can be from 0 - 2 */
/* i2c_num can be from 0 - 3 */
int enable_i2c_clk(unsigned char enable, unsigned i2c_num)
{
u32 reg;
u32 mask;
if (i2c_num > 2)
if (i2c_num > 3)
return -EINVAL;
mask = MXC_CCM_CCGR_CG_MASK
<< (MXC_CCM_CCGR2_I2C1_SERIAL_OFFSET + (i2c_num << 1));
reg = __raw_readl(&imx_ccm->CCGR2);
if (enable)
reg |= mask;
else
reg &= ~mask;
__raw_writel(reg, &imx_ccm->CCGR2);
if (i2c_num < 3) {
mask = MXC_CCM_CCGR_CG_MASK
<< (MXC_CCM_CCGR2_I2C1_SERIAL_OFFSET
+ (i2c_num << 1));
reg = __raw_readl(&imx_ccm->CCGR2);
if (enable)
reg |= mask;
else
reg &= ~mask;
__raw_writel(reg, &imx_ccm->CCGR2);
} else {
mask = MXC_CCM_CCGR_CG_MASK
<< (MXC_CCM_CCGR1_I2C4_SERIAL_OFFSET);
reg = __raw_readl(&imx_ccm->CCGR1);
if (enable)
reg |= mask;
else
reg &= ~mask;
__raw_writel(reg, &imx_ccm->CCGR1);
}
return 0;
}
#endif