linux-kernel - Re: [PATCH v2 02/19] clk: imx6q: add ethernet refclock mux support

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Message-ID: <Y9auKU6xS4eiEuVy@linaro.org>
Date:   Sun, 29 Jan 2023 19:34:33 +0200
From:   Abel Vesa <abel.vesa@...aro.org>
To:     Oleksij Rempel <o.rempel@...gutronix.de>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Abel Vesa <abelvesa@...nel.org>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Richard Cochran <richardcochran@...il.com>,
        kernel@...gutronix.de, Fabio Estevam <festevam@...il.com>,
        NXP Linux Team <linux-imx@....com>,
        Russell King <linux@...linux.org.uk>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-clk@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: [PATCH v2 02/19] clk: imx6q: add ethernet refclock mux support

On 23-01-17 07:14:36, Oleksij Rempel wrote:
> Add ethernet refclock mux support and set it to internal clock by
> default. This configuration will not affect existing boards since
> machine code currently overwrites this default.
> 
> The machine code will be fixed in a separate patch.
> 
> Signed-off-by: Oleksij Rempel <o.rempel@...gutronix.de>

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

> ---
>  drivers/clk/imx/clk-imx6q.c               | 13 +++++++++++++
>  include/dt-bindings/clock/imx6qdl-clock.h |  4 +++-
>  2 files changed, 16 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/clk/imx/clk-imx6q.c b/drivers/clk/imx/clk-imx6q.c
> index de36f58d551c..22b464ca22c8 100644
> --- a/drivers/clk/imx/clk-imx6q.c
> +++ b/drivers/clk/imx/clk-imx6q.c
> @@ -12,6 +12,7 @@
>  #include <linux/clk-provider.h>
>  #include <linux/err.h>
>  #include <linux/io.h>
> +#include <linux/mfd/syscon/imx6q-iomuxc-gpr.h>
>  #include <linux/of.h>
>  #include <linux/of_address.h>
>  #include <linux/of_irq.h>
> @@ -115,6 +116,10 @@ static struct clk_div_table video_div_table[] = {
>  	{ /* sentinel */ }
>  };
>  
> +static const char * enet_ref_sels[] = { "enet_ref", "enet_ref_pad", };
> +static const u32 enet_ref_sels_table[] = { IMX6Q_GPR1_ENET_CLK_SEL_ANATOP, IMX6Q_GPR1_ENET_CLK_SEL_PAD };
> +static const u32 enet_ref_sels_table_mask = IMX6Q_GPR1_ENET_CLK_SEL_ANATOP;
> +
>  static unsigned int share_count_esai;
>  static unsigned int share_count_asrc;
>  static unsigned int share_count_ssi1;
> @@ -908,6 +913,12 @@ static void __init imx6q_clocks_init(struct device_node *ccm_node)
>  	if (clk_on_imx6q() && imx_get_soc_revision() == IMX_CHIP_REVISION_1_0)
>  		hws[IMX6QDL_CLK_GPT_3M] = hws[IMX6QDL_CLK_GPT_IPG_PER];
>  
> +	hws[IMX6QDL_CLK_ENET_REF_PAD] = imx6q_obtain_fixed_clk_hw(ccm_node, "enet_ref_pad", 0);
> +
> +	hws[IMX6QDL_CLK_ENET_REF_SEL] = imx_clk_gpr_mux("enet_ref_sel", "fsl,imx6q-iomuxc-gpr",
> +				IOMUXC_GPR1, enet_ref_sels, ARRAY_SIZE(enet_ref_sels),
> +				enet_ref_sels_table, enet_ref_sels_table_mask);
> +
>  	imx_check_clk_hws(hws, IMX6QDL_CLK_END);
>  
>  	of_clk_add_hw_provider(np, of_clk_hw_onecell_get, clk_hw_data);
> @@ -974,6 +985,8 @@ static void __init imx6q_clocks_init(struct device_node *ccm_node)
>  			       hws[IMX6QDL_CLK_PLL3_USB_OTG]->clk);
>  	}
>  
> +	clk_set_parent(hws[IMX6QDL_CLK_ENET_REF_SEL]->clk, hws[IMX6QDL_CLK_ENET_REF]->clk);
> +
>  	imx_register_uart_clocks(2);
>  }
>  CLK_OF_DECLARE(imx6q, "fsl,imx6q-ccm", imx6q_clocks_init);
> diff --git a/include/dt-bindings/clock/imx6qdl-clock.h b/include/dt-bindings/clock/imx6qdl-clock.h
> index e20c43cc36f6..e5b2a1ba02bc 100644
> --- a/include/dt-bindings/clock/imx6qdl-clock.h
> +++ b/include/dt-bindings/clock/imx6qdl-clock.h
> @@ -273,6 +273,8 @@
>  #define IMX6QDL_CLK_MMDC_P0_IPG			263
>  #define IMX6QDL_CLK_DCIC1			264
>  #define IMX6QDL_CLK_DCIC2			265
> -#define IMX6QDL_CLK_END				266
> +#define IMX6QDL_CLK_ENET_REF_SEL		266
> +#define IMX6QDL_CLK_ENET_REF_PAD		267
> +#define IMX6QDL_CLK_END				268
>  
>  #endif /* __DT_BINDINGS_CLOCK_IMX6QDL_H */
> -- 
> 2.30.2
>