On Sun, 2019-02-03 at 00:02 +0100, Lukasz Majewski wrote:
> Provide function to enable I2C clocks for vf610 - in the generic
> code.
> This function overrides the default weak function implementation
> (which
> only returns 1).
>
> Signed-off-by: Lukasz Majewski <lu...@denx.de>
Tested-by: Marcel Ziswiler <marcel.ziswi...@toradex.com>
> ---
>
> Changes in v3:
> - Add code to enable I2C0 code as suggested by Stefan (so the code
> can be
> reused by other boards without regressions)
> - Exclude the pcm052.c related code to a separate patch
>
> Changes in v2: None
>
> arch/arm/cpu/armv7/vf610/generic.c | 22 ++++++++++++++++++++++
> arch/arm/include/asm/arch-vf610/clock.h | 3 +++
> 2 files changed, 25 insertions(+)
>
> diff --git a/arch/arm/cpu/armv7/vf610/generic.c
> b/arch/arm/cpu/armv7/vf610/generic.c
> index cbd3391918..e0c0b1bcb0 100644
> --- a/arch/arm/cpu/armv7/vf610/generic.c
> +++ b/arch/arm/cpu/armv7/vf610/generic.c
> @@ -375,3 +375,25 @@ void enable_caches(void)
> mmu_set_region_dcache_behaviour(IRAM_BASE_ADDR, IRAM_SIZE,
> option);
> }
> #endif
> +
> +#ifdef CONFIG_SYS_I2C_MXC
> +/* i2c_num can be from 0 - 3 */
> +int enable_i2c_clk(unsigned char enable, unsigned int i2c_num)
> +{
> + struct ccm_reg *ccm = (struct ccm_reg *)CCM_BASE_ADDR;
> +
> + switch (i2c_num) {
> + case 0:
> + clrsetbits_le32(&ccm->ccgr4, CCM_CCGR4_I2C0_CTRL_MASK,
> + CCM_CCGR4_I2C0_CTRL_MASK);
> + case 2:
> + clrsetbits_le32(&ccm->ccgr10,
> CCM_CCGR10_I2C2_CTRL_MASK,
> + CCM_CCGR10_I2C2_CTRL_MASK);
> + break;
> + default:
> + return -EINVAL;
> + }
> +
> + return 0;
> +}
> +#endif
> diff --git a/arch/arm/include/asm/arch-vf610/clock.h
> b/arch/arm/include/asm/arch-vf610/clock.h
> index 3bd73a01f3..72184fd608 100644
> --- a/arch/arm/include/asm/arch-vf610/clock.h
> +++ b/arch/arm/include/asm/arch-vf610/clock.h
> @@ -22,6 +22,9 @@ enum mxc_clock {
> void enable_ocotp_clk(unsigned char enable);
> unsigned int mxc_get_clock(enum mxc_clock clk);
> u32 get_lpuart_clk(void);
> +#ifdef CONFIG_SYS_I2C_MXC
> +int enable_i2c_clk(unsigned char enable, unsigned int i2c_num);
> +#endif
>
> #define imx_get_fecclk() mxc_get_clock(MXC_FEC_CLK)
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