linux-kernel - Re: [PATCH V2 8/8] clk: imx93: add SAI IPG clk

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Date:   Mon, 15 Aug 2022 12:12:33 +0300
From:   Abel Vesa <abel.vesa@...aro.org>
To:     "Peng Fan (OSS)" <peng.fan@....nxp.com>
Cc:     robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        shawnguo@...nel.org, s.hauer@...gutronix.de, abelvesa@...nel.org,
        mturquette@...libre.com, sboyd@...nel.org, kernel@...gutronix.de,
        festevam@...il.com, linux-imx@....com, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-clk@...r.kernel.org, Peng Fan <peng.fan@....com>
Subject: Re: [PATCH V2 8/8] clk: imx93: add SAI IPG clk

On 22-08-15 09:30:39, Peng Fan (OSS) wrote:
> From: Peng Fan <peng.fan@....com>
> 
> The clk topology is as below:
> bus_aon_root------>\                  /--->SAI IPG
>                     -->SAI LPCG gate-->
> sai[x]_clk_root--->/                  \--->SAI MCLK
> 
> So use shared count as i.MX93 MU_B gate.
> 
> Signed-off-by: Peng Fan <peng.fan@....com>

Reviewed-by: Abel Vesa <abel.vesa@...aro.org>

> ---
>  drivers/clk/imx/clk-imx93.c | 12 +++++++++---
>  1 file changed, 9 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/clk/imx/clk-imx93.c b/drivers/clk/imx/clk-imx93.c
> index 4008ab075dfe..6a76b9fdf18d 100644
> --- a/drivers/clk/imx/clk-imx93.c
> +++ b/drivers/clk/imx/clk-imx93.c
> @@ -28,6 +28,9 @@ enum clk_sel {
>  	MAX_SEL
>  };
>  
> +static u32 share_count_sai1;
> +static u32 share_count_sai2;
> +static u32 share_count_sai3;
>  static u32 share_count_mub;
>  
>  static const char *parent_names[MAX_SEL][4] = {
> @@ -215,9 +218,12 @@ static const struct imx93_clk_ccgr {
>  	{ IMX93_CLK_USDHC1_GATE,	"usdhc1",	"usdhc1_root",		0x9380, },
>  	{ IMX93_CLK_USDHC2_GATE,	"usdhc2",	"usdhc2_root",		0x93c0, },
>  	{ IMX93_CLK_USDHC3_GATE,	"usdhc3",	"usdhc3_root",		0x9400, },
> -	{ IMX93_CLK_SAI1_GATE,		"sai1",		"sai1_root",		0x9440, },
> -	{ IMX93_CLK_SAI2_GATE,		"sai2",		"sai2_root",		0x9480, },
> -	{ IMX93_CLK_SAI3_GATE,		"sai3",		"sai3_root",		0x94c0, },
> +	{ IMX93_CLK_SAI1_GATE,          "sai1",         "sai1_root",            0x9440, 0, &share_count_sai1},
> +	{ IMX93_CLK_SAI1_IPG,		"sai1_ipg_clk", "bus_aon_root",		0x9440, 0, &share_count_sai1},
> +	{ IMX93_CLK_SAI2_GATE,          "sai2",         "sai2_root",            0x9480, 0, &share_count_sai2},
> +	{ IMX93_CLK_SAI2_IPG,		"sai2_ipg_clk", "bus_wakeup_root",	0x9480, 0, &share_count_sai2},
> +	{ IMX93_CLK_SAI3_GATE,          "sai3",         "sai3_root",            0x94c0, 0, &share_count_sai3},
> +	{ IMX93_CLK_SAI3_IPG,		"sai3_ipg_clk", "bus_wakeup_root",	0x94c0, 0, &share_count_sai3},
>  	{ IMX93_CLK_MIPI_CSI_GATE,	"mipi_csi",	"media_apb_root",	0x9580, },
>  	{ IMX93_CLK_MIPI_DSI_GATE,	"mipi_dsi",	"media_apb_root",	0x95c0, },
>  	{ IMX93_CLK_LVDS_GATE,		"lvds",		"media_ldb_root",	0x9600, },
> -- 
> 2.37.1
>