linux-kernel - Re: [PATCH v2 2/2] spi: spi-imx: Fix casting warnings

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Message-ID: <ZwVP8P0/NFJqOi2t@lizhi-Precision-Tower-5810>
Date: Tue, 8 Oct 2024 11:29:52 -0400
From: Frank Li <Frank.li@....com>
To: Hardevsinh Palaniya <hardevsinh.palaniya@...iconsignals.io>
Cc: olteanv@...il.com, broonie@...nel.org, shawnguo@...nel.org,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Pengutronix Kernel Team <kernel@...gutronix.de>,
	Fabio Estevam <festevam@...il.com>, linux-spi@...r.kernel.org,
	imx@...ts.linux.dev, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v2 2/2] spi: spi-imx: Fix casting warnings

On Tue, Oct 08, 2024 at 11:25:46AM +0530, Hardevsinh Palaniya wrote:
> Sparse warnings:
>
> drivers/spi/spi-imx.c:410:19: warning: cast to restricted __be32
> drivers/spi/spi-imx.c:410:19: warning: cast to restricted __be32
> drivers/spi/spi-imx.c:410:19: warning: cast to restricted __be32
> drivers/spi/spi-imx.c:410:19: warning: cast to restricted __be32
> drivers/spi/spi-imx.c:410:19: warning: cast to restricted __be32
> drivers/spi/spi-imx.c:410:19: warning: cast to restricted __be32
> drivers/spi/spi-imx.c:439:21: warning: incorrect type in assignment (different base types)
> drivers/spi/spi-imx.c:439:21:    expected unsigned int [addressable] [usertype] val
> drivers/spi/spi-imx.c:439:21:    got restricted __be32 [usertype]
>
> Signed-off-by: Hardevsinh Palaniya <hardevsinh.palaniya@...iconsignals.io>
> ---

Reviewed-by: Frank Li <Frank.Li@....com>

>  drivers/spi/spi-imx.c | 5 ++---
>  1 file changed, 2 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c
> index 4c31d36f3130..fefee771b042 100644
> --- a/drivers/spi/spi-imx.c
> +++ b/drivers/spi/spi-imx.c
> @@ -407,7 +407,7 @@ static void spi_imx_buf_tx_swap(struct spi_imx_data *spi_imx)
>
>  static void mx53_ecspi_rx_target(struct spi_imx_data *spi_imx)
>  {
> -	u32 val = be32_to_cpu(readl(spi_imx->base + MXC_CSPIRXDATA));
> +	u32 val = ioread32be(spi_imx->base + MXC_CSPIRXDATA);
>
>  	if (spi_imx->rx_buf) {
>  		int n_bytes = spi_imx->target_burst % sizeof(val);
> @@ -436,13 +436,12 @@ static void mx53_ecspi_tx_target(struct spi_imx_data *spi_imx)
>  	if (spi_imx->tx_buf) {
>  		memcpy(((u8 *)&val) + sizeof(val) - n_bytes,
>  		       spi_imx->tx_buf, n_bytes);
> -		val = cpu_to_be32(val);
>  		spi_imx->tx_buf += n_bytes;
>  	}
>
>  	spi_imx->count -= n_bytes;
>
> -	writel(val, spi_imx->base + MXC_CSPITXDATA);
> +	iowrite32be(val, spi_imx->base + MXC_CSPITXDATA);
>  }
>
>  /* MX51 eCSPI */
> --
> 2.43.0
>