linux-kernel - Re: [PATCH v2 1/6] ARM: dra762: hwmod: Add MCAN support

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Date:   Wed, 30 May 2018 07:50:47 -0700
From:   Tony Lindgren <tony@...mide.com>
To:     Faiz Abbas <faiz_abbas@...com>
Cc:     linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        linux-omap@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-clk@...r.kernel.org, robh+dt@...nel.org,
        bcousson@...libre.com, paul@...an.com, t-kristo@...com
Subject: Re: [PATCH v2 1/6] ARM: dra762: hwmod: Add MCAN support

* Faiz Abbas <faiz_abbas@...com> [180530 14:12]:
> From: Lokesh Vutla <lokeshvutla@...com>
> 
> Add MCAN hwmod data and register it for dra762 silicons.
> 
> Signed-off-by: Lokesh Vutla <lokeshvutla@...com>
> Signed-off-by: Faiz Abbas <faiz_abbas@...com>
> ---
>  arch/arm/mach-omap2/omap_hwmod_7xx_data.c | 32 +++++++++++++++++++++++
>  1 file changed, 32 insertions(+)
> 
> diff --git a/arch/arm/mach-omap2/omap_hwmod_7xx_data.c b/arch/arm/mach-omap2/omap_hwmod_7xx_data.c
> index 62352d1e6361..a2cd7f865a60 100644
> --- a/arch/arm/mach-omap2/omap_hwmod_7xx_data.c
> +++ b/arch/arm/mach-omap2/omap_hwmod_7xx_data.c
> @@ -1355,6 +1355,29 @@ static struct omap_hwmod dra7xx_mailbox13_hwmod = {
>  	},
>  };
>  
> +/*
> + * 'mcan' class
> + *
> + */
> +static struct omap_hwmod_class dra76x_mcan_hwmod_class = {
> +	.name	= "mcan",
> +};
> +
> +/* mcan */
> +static struct omap_hwmod dra76x_mcan_hwmod = {
> +	.name		= "mcan",
> +	.class		= &dra76x_mcan_hwmod_class,
> +	.clkdm_name	= "wkupaon_clkdm",
> +	.main_clk	= "mcan_clk",
> +	.prcm = {
> +		.omap4 = {
> +			.clkctrl_offs = DRA7XX_CM_WKUPAON_ADC_CLKCTRL_OFFSET,
> +			.context_offs = DRA7XX_RM_WKUPAON_ADC_CONTEXT_OFFSET,
> +			.modulemode   = MODULEMODE_SWCTRL,
> +		},
> +	},
> +};

You should be now able to leave out at least the clkctrl_offs and modulemode
here. Please also check if leaving out clkdm_name and main_clk now works :)

> @@ -3818,6 +3841,14 @@ static struct omap_hwmod_ocp_if dra7xx_l4_per2__epwmss2 = {
>  	.user		= OCP_USER_MPU,
>  };
>  
> +/* l3_main_1 -> mcan */
> +static struct omap_hwmod_ocp_if dra76x_l3_main_1__mcan = {
> +	.master		= &dra7xx_l3_main_1_hwmod,
> +	.slave		= &dra76x_mcan_hwmod,
> +	.clk		= "l3_iclk_div",
> +	.user		= OCP_USER_MPU | OCP_USER_SDMA,
> +};

I think this we still need though for the clk. Tero, do you have any comments
on what all clocks can now be left out?

Regards,

Tony