[U-Boot] [PATCH 3/4] mx6: clock: Introduce disable_ipu_clock()

[Peng Fan]

> Subject: [PATCH 3/4] mx6: clock: Introduce disable_ipu_clock()
> 
> Introduce disable_ipu_clock(). This is done in preparation for configuring the
> NoC registers on i.MX6QP in SPL.
> 
> Afer the NoC registers are set the IPU clocks can be disabled.
> 
> Signed-off-by: Fabio Estevam <festevam at gmail.com>
> ---
>  arch/arm/include/asm/arch-mx6/clock.h |  1 +
>  arch/arm/mach-imx/mx6/clock.c         | 12 ++++++++++++
>  2 files changed, 13 insertions(+)
> 
> diff --git a/arch/arm/include/asm/arch-mx6/clock.h
> b/arch/arm/include/asm/arch-mx6/clock.h
> index a9481a5fea..f7760541a4 100644
> --- a/arch/arm/include/asm/arch-mx6/clock.h
> +++ b/arch/arm/include/asm/arch-mx6/clock.h
> @@ -71,6 +71,7 @@ int enable_pcie_clock(void);  int
> enable_i2c_clk(unsigned char enable, unsigned i2c_num);  int
> enable_spi_clk(unsigned char enable, unsigned spi_num);  void
> enable_ipu_clock(void);
> +void disable_ipu_clock(void);
>  int enable_fec_anatop_clock(int fec_id, enum enet_freq freq);  void
> enable_enet_clk(unsigned char enable);  int enable_lcdif_clock(u32
> base_addr, bool enable); diff --git a/arch/arm/mach-imx/mx6/clock.c
> b/arch/arm/mach-imx/mx6/clock.c index 9951f79106..e1e21e37a8 100644
> --- a/arch/arm/mach-imx/mx6/clock.c
> +++ b/arch/arm/mach-imx/mx6/clock.c
> @@ -1287,6 +1287,18 @@ void enable_ipu_clock(void)
>  		setbits_le32(&mxc_ccm->CCGR3,
> MXC_CCM_CCGR3_IPU2_IPU_MASK);
>  	}
>  }
> +
> +void disable_ipu_clock(void)
> +{
> +	struct mxc_ccm_reg *mxc_ccm = (struct mxc_ccm_reg
> *)CCM_BASE_ADDR;
> +
> +	clrbits_le32(&mxc_ccm->CCGR3, MXC_CCM_CCGR3_IPU1_IPU_MASK);
> +
> +	if (is_mx6dqp()) {
> +		clrbits_le32(&mxc_ccm->CCGR6,
> MXC_CCM_CCGR6_PRG_CLK0_MASK);
> +		clrbits_le32(&mxc_ccm->CCGR3,
> MXC_CCM_CCGR3_IPU2_IPU_MASK);
> +	}
> +}
>  #endif

Reviewed-by: Peng Fan <peng.fan at nxp.com>

> 
>  #ifndef CONFIG_SPL_BUILD
> --
> 2.17.1