linux-kernel - Re: [PATCH] ASoC: rsnd: ssiu: correct shift bit for ssiu9

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Message-ID: <87lg2vjde7.wl-kuninori.morimoto.gx@renesas.com>
Date:   05 Feb 2019 09:30:22 +0900
From:   Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>
To:     Jiada Wang <jiada_wang@...tor.com>
Cc:     <lgirdwood@...il.com>, <broonie@...nel.org>, <perex@...ex.cz>,
        <tiwai@...e.com>, <twischer@...adit-jv.com>,
        <alsa-devel@...a-project.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] ASoC: rsnd: ssiu: correct shift bit for ssiu9


Hi Jiada

> Currently "0xf << 36" is used to
> clear SSIU-9 internal buffer state, which overflows 32-bit value
> according to user reference manual, it is always bit4 ~ bit7
> of SSI_SYS_STATUS[1,3,5,7] registers indicate
> SSIU-9's buffer state, so "0xf << 4" should be used.
> 
> This patch fix incorrect shifting issue in SSIU-9 case
> 
> Fixes: commit b7169ddea2f2 ("ASoC: rsnd: remove RSND_REG_ from rsnd_reg")
> 
> Signed-off-by: Jiada Wang <jiada_wang@...tor.com>
> ---

Thank you for your patch

Acked-by: Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>

>  sound/soc/sh/rcar/ssiu.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/sound/soc/sh/rcar/ssiu.c b/sound/soc/sh/rcar/ssiu.c
> index 2f3085a54eba..b11677489a5e 100644
> --- a/sound/soc/sh/rcar/ssiu.c
> +++ b/sound/soc/sh/rcar/ssiu.c
> @@ -79,7 +79,7 @@ static int rsnd_ssiu_init(struct rsnd_mod *mod,
>  		break;
>  	case 9:
>  		for (i = 0; i < 4; i++)
> -			rsnd_mod_write(mod, SSI_SYS_STATUS((i * 2) + 1), 0xf << (id * 4));
> +			rsnd_mod_write(mod, SSI_SYS_STATUS((i * 2) + 1), 0xf << 4);
>  		break;
>  	}
>  
> -- 
> 2.19.2
>