From:   Michael Ellerman <mpe@ellerman.id.au>
To:     Herve Codina <herve.codina@bootlin.com>,
        Herve Codina <herve.codina@bootlin.com>,
        Li Yang <leoyang.li@nxp.com>, Rob Herring <robh+dt@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        Liam Girdwood <lgirdwood@gmail.com>,
        Mark Brown <broonie@kernel.org>,
        Christophe Leroy <christophe.leroy@csgroup.eu>,
        Nicholas Piggin <npiggin@gmail.com>,
        Qiang Zhao <qiang.zhao@nxp.com>,
        Jaroslav Kysela <perex@perex.cz>,
        Takashi Iwai <tiwai@suse.com>,
        Shengjiu Wang <shengjiu.wang@gmail.com>,
        Xiubo Li <Xiubo.Lee@gmail.com>,
        Fabio Estevam <festevam@gmail.com>,
        Nicolin Chen <nicoleotsuka@gmail.com>
Cc:     linuxppc-dev@lists.ozlabs.org,
        linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org,
        linux-kernel@vger.kernel.org, alsa-devel@alsa-project.org,
        Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Subject: Re: [PATCH v4 04/10] powerpc/8xx: Use a larger CPM1 command check mask
In-Reply-To: <20230126083222.374243-5-herve.codina@bootlin.com>
References: <20230126083222.374243-1-herve.codina@bootlin.com>
 <20230126083222.374243-5-herve.codina@bootlin.com>
Date:   Thu, 26 Jan 2023 20:59:03 +1100
Message-ID: <87mt65pqfs.fsf@mpe.ellerman.id.au>
MIME-Version: 1.0
Content-Type: text/plain
Precedence: bulk

Herve Codina <herve.codina@bootlin.com> writes:
> The CPM1 command mask is defined for use with the standard
> CPM1 command register as described in the user's manual:
>   0  |1        3|4    7|8   11|12      14| 15|
>   RST|    -     |OPCODE|CH_NUM|     -    |FLG|
>
> In the QMC extension the CPM1 command register is redefined
> (QMC supplement user's manuel) with the following mapping:
>   0  |1        3|4    7|8           13|14| 15|
>   RST|QMC OPCODE|  1110|CHANNEL_NUMBER| -|FLG|
>
> Extend the check command mask in order to support both the
> standard CH_NUM field and the QMC extension CHANNEL_NUMBER
> field.
>
> Signed-off-by: Herve Codina <herve.codina@bootlin.com>
> Acked-by: Christophe Leroy <christophe.leroy@csgroup.eu>
> ---
>  arch/powerpc/platforms/8xx/cpm1.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)

Acked-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc)

cheers

> diff --git a/arch/powerpc/platforms/8xx/cpm1.c b/arch/powerpc/platforms/8xx/cpm1.c
> index 8ef1f4392086..6b828b9f90d9 100644
> --- a/arch/powerpc/platforms/8xx/cpm1.c
> +++ b/arch/powerpc/platforms/8xx/cpm1.c
> @@ -100,7 +100,7 @@ int cpm_command(u32 command, u8 opcode)
>  	int i, ret;
>  	unsigned long flags;
>  
> -	if (command & 0xffffff0f)
> +	if (command & 0xffffff03)
>  		return -EINVAL;
>  
>  	spin_lock_irqsave(&cmd_lock, flags);
> -- 
> 2.39.0