On 01/07/2015 11:01, Peng Fan wrote:
> Add I2C4 clock support for i.MX6SX. Since we use runtime check,
> but not macro, we need to remove `#ifdef ..` in crm_regs.h, or
> gcc will fail to compile the code succesfully.
> 
> Making the macros only for i.MX6SX open to other i.MX6x maybe not
> a good choice, but we have runtime check.
> 
> Signed-off-by: Peng Fan <peng....@freescale.com>
> ---
> 
> Changes v2:
>  correct spelling error in commit log.
> 
>  arch/arm/cpu/armv7/mx6/clock.c           | 14 ++++++++++----
>  arch/arm/include/asm/arch-mx6/crm_regs.h |  5 ++---
>  2 files changed, 12 insertions(+), 7 deletions(-)
> 
> diff --git a/arch/arm/cpu/armv7/mx6/clock.c b/arch/arm/cpu/armv7/mx6/clock.c
> index 7bd78d7..3e94472 100644
> --- a/arch/arm/cpu/armv7/mx6/clock.c
> +++ b/arch/arm/cpu/armv7/mx6/clock.c
> @@ -126,6 +126,7 @@ int enable_i2c_clk(unsigned char enable, unsigned i2c_num)
>  {
>       u32 reg;
>       u32 mask;
> +     u32 *addr;
>  
>       if (i2c_num > 3)
>               return -EINVAL;
> @@ -140,14 +141,19 @@ int enable_i2c_clk(unsigned char enable, unsigned 
> i2c_num)
>                       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 (is_cpu_type(MXC_CPU_MX6SX)) {
> +                     mask = MXC_CCM_CCGR6_I2C4_MASK;
> +                     addr = &imx_ccm->CCGR6;
> +             } else {
> +                     mask = MXC_CCM_CCGR1_I2C4_SERIAL_MASK;
> +                     addr = &imx_ccm->CCGR1;
> +             }
> +             reg = __raw_readl(addr);
>               if (enable)
>                       reg |= mask;
>               else
>                       reg &= ~mask;
> -             __raw_writel(reg, &imx_ccm->CCGR1);
> +             __raw_writel(reg, addr);
>       }
>       return 0;
>  }
> diff --git a/arch/arm/include/asm/arch-mx6/crm_regs.h 
> b/arch/arm/include/asm/arch-mx6/crm_regs.h
> index 5bbf6e0..7d9fe73 100644
> --- a/arch/arm/include/asm/arch-mx6/crm_regs.h
> +++ b/arch/arm/include/asm/arch-mx6/crm_regs.h
> @@ -742,7 +742,7 @@ struct mxc_ccm_reg {
>  #define MXC_CCM_CCGR6_USDHC4_MASK            (3 << 
> MXC_CCM_CCGR6_USDHC4_OFFSET)
>  #define MXC_CCM_CCGR6_EMI_SLOW_OFFSET                10
>  #define MXC_CCM_CCGR6_EMI_SLOW_MASK          (3 << 
> MXC_CCM_CCGR6_EMI_SLOW_OFFSET)
> -#ifdef CONFIG_MX6SX
> +/* The following *CCGR6* exist only i.MX6SX */
>  #define MXC_CCM_CCGR6_PWM8_OFFSET            16
>  #define MXC_CCM_CCGR6_PWM8_MASK                      (3 << 
> MXC_CCM_CCGR6_PWM8_OFFSET)
>  #define MXC_CCM_CCGR6_VADC_OFFSET            20
> @@ -757,10 +757,9 @@ struct mxc_ccm_reg {
>  #define MXC_CCM_CCGR6_PWM6_MASK                      (3 << 
> MXC_CCM_CCGR6_PWM6_OFFSET)
>  #define MXC_CCM_CCGR6_PWM7_OFFSET            30
>  #define MXC_CCM_CCGR6_PWM7_MASK                      (3 << 
> MXC_CCM_CCGR6_PWM7_OFFSET)
> -#else
> +/* The two does not exist on i.MX6SX */
>  #define MXC_CCM_CCGR6_VDOAXICLK_OFFSET               12
>  #define MXC_CCM_CCGR6_VDOAXICLK_MASK         (3 << 
> MXC_CCM_CCGR6_VDOAXICLK_OFFSET)
> -#endif
>  
>  #define BM_ANADIG_PLL_SYS_LOCK 0x80000000
>  #define BP_ANADIG_PLL_SYS_RSVD0      20
> 

Applied to u-boot-imx, thanks !

Best regards,
Stefano Babic
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