linux-kernel - Re: [PATCH v2 2/7] firmware: raspberrypi: Move the clock IDs to the firmware header

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Date:   Tue, 20 Sep 2022 18:01:08 +0200
From:   Stefan Wahren <stefan.wahren@...e.com>
To:     Maxime Ripard <maxime@...no.tech>, Daniel Vetter <daniel@...ll.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        David Airlie <airlied@...ux.ie>,
        Broadcom internal kernel review list 
        <bcm-kernel-feedback-list@...adcom.com>,
        Michael Turquette <mturquette@...libre.com>,
        Scott Branden <sbranden@...adcom.com>,
        Stephen Boyd <sboyd@...nel.org>, Emma Anholt <emma@...olt.net>,
        Ray Jui <rjui@...adcom.com>, Maxime Ripard <mripard@...nel.org>
Cc:     linux-rpi-kernel@...ts.infradead.org, linux-clk@...r.kernel.org,
        linux-kernel@...r.kernel.org, Dom Cobley <popcornmix@...il.com>,
        dri-devel@...ts.freedesktop.org,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v2 2/7] firmware: raspberrypi: Move the clock IDs to the
 firmware header

Hi Maxime,

Am 20.09.22 um 14:50 schrieb Maxime Ripard:
> We'll need the clock IDs in more drivers than just the clock driver from
> now on, so let's move them in the firmware header.

recently as i reviewed the clk-raspberrypi i noticed this, too. But from 
my point of view the clock ids should go to include/dt-bindings/clock 
(like bcm2835.h) because these clock ids are actually referenced in the 
DTS files and we need to make sure they are in sync. AFAIR this would 
also result in change from enum to defines.

Sorry, i didn't had the time to send a patch for this.

>
> Signed-off-by: Maxime Ripard <maxime@...no.tech>
>
> diff --git a/drivers/clk/bcm/clk-raspberrypi.c b/drivers/clk/bcm/clk-raspberrypi.c
> index 876b37b8683c..1f5e6a1554e6 100644
> --- a/drivers/clk/bcm/clk-raspberrypi.c
> +++ b/drivers/clk/bcm/clk-raspberrypi.c
> @@ -18,24 +18,6 @@
>   
>   #include <soc/bcm2835/raspberrypi-firmware.h>
>   
> -enum rpi_firmware_clk_id {
> -	RPI_FIRMWARE_EMMC_CLK_ID = 1,
> -	RPI_FIRMWARE_UART_CLK_ID,
> -	RPI_FIRMWARE_ARM_CLK_ID,
> -	RPI_FIRMWARE_CORE_CLK_ID,
> -	RPI_FIRMWARE_V3D_CLK_ID,
> -	RPI_FIRMWARE_H264_CLK_ID,
> -	RPI_FIRMWARE_ISP_CLK_ID,
> -	RPI_FIRMWARE_SDRAM_CLK_ID,
> -	RPI_FIRMWARE_PIXEL_CLK_ID,
> -	RPI_FIRMWARE_PWM_CLK_ID,
> -	RPI_FIRMWARE_HEVC_CLK_ID,
> -	RPI_FIRMWARE_EMMC2_CLK_ID,
> -	RPI_FIRMWARE_M2MC_CLK_ID,
> -	RPI_FIRMWARE_PIXEL_BVB_CLK_ID,
> -	RPI_FIRMWARE_NUM_CLK_ID,
> -};
> -
>   static char *rpi_firmware_clk_names[] = {
>   	[RPI_FIRMWARE_EMMC_CLK_ID]	= "emmc",
>   	[RPI_FIRMWARE_UART_CLK_ID]	= "uart",
> diff --git a/include/soc/bcm2835/raspberrypi-firmware.h b/include/soc/bcm2835/raspberrypi-firmware.h
> index 63426082bcb9..74c7bcc1ac2a 100644
> --- a/include/soc/bcm2835/raspberrypi-firmware.h
> +++ b/include/soc/bcm2835/raspberrypi-firmware.h
> @@ -136,6 +136,24 @@ enum rpi_firmware_property_tag {
>   	RPI_FIRMWARE_GET_DMA_CHANNELS =                       0x00060001,
>   };
>   
> +enum rpi_firmware_clk_id {
> +	RPI_FIRMWARE_EMMC_CLK_ID = 1,
> +	RPI_FIRMWARE_UART_CLK_ID,
> +	RPI_FIRMWARE_ARM_CLK_ID,
> +	RPI_FIRMWARE_CORE_CLK_ID,
> +	RPI_FIRMWARE_V3D_CLK_ID,
> +	RPI_FIRMWARE_H264_CLK_ID,
> +	RPI_FIRMWARE_ISP_CLK_ID,
> +	RPI_FIRMWARE_SDRAM_CLK_ID,
> +	RPI_FIRMWARE_PIXEL_CLK_ID,
> +	RPI_FIRMWARE_PWM_CLK_ID,
> +	RPI_FIRMWARE_HEVC_CLK_ID,
> +	RPI_FIRMWARE_EMMC2_CLK_ID,
> +	RPI_FIRMWARE_M2MC_CLK_ID,
> +	RPI_FIRMWARE_PIXEL_BVB_CLK_ID,
> +	RPI_FIRMWARE_NUM_CLK_ID,
> +};
> +
>   #if IS_ENABLED(CONFIG_RASPBERRYPI_FIRMWARE)
>   int rpi_firmware_property(struct rpi_firmware *fw,
>   			  u32 tag, void *data, size_t len);
>