linux-kernel - Re: [PATCH v2 1/2] clk: imx: imx6ul: Move csi

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Date:   Tue, 28 Sep 2021 12:11:34 +0300
From:   Abel Vesa <abel.vesa@....com>
To:     Stefan Riedmueller <s.riedmueller@...tec.de>
Cc:     Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        NXP Linux Team <linux-imx@....com>,
        linux-clk@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/2] clk: imx: imx6ul: Move csi_sel mux to correct
 base register

On 21-09-27 09:28:56, Stefan Riedmueller wrote:
> The csi_sel mux register is located in the CCM register base and not the
> CCM_ANALOG register base. So move it to the correct position in code.
> 
> Otherwise changing the parent of the csi clock can lead to a complete
> system failure due to the CCM_ANALOG_PLL_SYS_TOG register being falsely
> modified.
> 
> Also remove the SET_RATE_PARENT flag since one possible supply for the
> csi_sel mux is the system PLL which we don't want to modify.
> 
> Signed-off-by: Stefan Riedmueller <s.riedmueller@...tec.de>

Applied both. Thanks.

> ---
> No changes in v2.
> ---
>  drivers/clk/imx/clk-imx6ul.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/clk/imx/clk-imx6ul.c b/drivers/clk/imx/clk-imx6ul.c
> index 5dbb6a937732..206e4c43f68f 100644
> --- a/drivers/clk/imx/clk-imx6ul.c
> +++ b/drivers/clk/imx/clk-imx6ul.c
> @@ -161,7 +161,6 @@ static void __init imx6ul_clocks_init(struct device_node *ccm_node)
>  	hws[IMX6UL_PLL5_BYPASS] = imx_clk_hw_mux_flags("pll5_bypass", base + 0xa0, 16, 1, pll5_bypass_sels, ARRAY_SIZE(pll5_bypass_sels), CLK_SET_RATE_PARENT);
>  	hws[IMX6UL_PLL6_BYPASS] = imx_clk_hw_mux_flags("pll6_bypass", base + 0xe0, 16, 1, pll6_bypass_sels, ARRAY_SIZE(pll6_bypass_sels), CLK_SET_RATE_PARENT);
>  	hws[IMX6UL_PLL7_BYPASS] = imx_clk_hw_mux_flags("pll7_bypass", base + 0x20, 16, 1, pll7_bypass_sels, ARRAY_SIZE(pll7_bypass_sels), CLK_SET_RATE_PARENT);
> -	hws[IMX6UL_CLK_CSI_SEL] = imx_clk_hw_mux_flags("csi_sel", base + 0x3c, 9, 2, csi_sels, ARRAY_SIZE(csi_sels), CLK_SET_RATE_PARENT);
>  
>  	/* Do not bypass PLLs initially */
>  	clk_set_parent(hws[IMX6UL_PLL1_BYPASS]->clk, hws[IMX6UL_CLK_PLL1]->clk);
> @@ -270,6 +269,7 @@ static void __init imx6ul_clocks_init(struct device_node *ccm_node)
>  	hws[IMX6UL_CLK_ECSPI_SEL]	  = imx_clk_hw_mux("ecspi_sel",	base + 0x38, 18, 1, ecspi_sels, ARRAY_SIZE(ecspi_sels));
>  	hws[IMX6UL_CLK_LCDIF_PRE_SEL]	  = imx_clk_hw_mux_flags("lcdif_pre_sel", base + 0x38, 15, 3, lcdif_pre_sels, ARRAY_SIZE(lcdif_pre_sels), CLK_SET_RATE_PARENT);
>  	hws[IMX6UL_CLK_LCDIF_SEL]	  = imx_clk_hw_mux("lcdif_sel",	base + 0x38, 9, 3, lcdif_sels, ARRAY_SIZE(lcdif_sels));
> +	hws[IMX6UL_CLK_CSI_SEL]		  = imx_clk_hw_mux("csi_sel", base + 0x3c, 9, 2, csi_sels, ARRAY_SIZE(csi_sels));
>  
>  	hws[IMX6UL_CLK_LDB_DI0_DIV_SEL]  = imx_clk_hw_mux("ldb_di0", base + 0x20, 10, 1, ldb_di0_div_sels, ARRAY_SIZE(ldb_di0_div_sels));
>  	hws[IMX6UL_CLK_LDB_DI1_DIV_SEL]  = imx_clk_hw_mux("ldb_di1", base + 0x20, 11, 1, ldb_di1_div_sels, ARRAY_SIZE(ldb_di1_div_sels));
> -- 
> 2.25.1
>