linux-kernel - Re: [PATCH 1/4] spi: bcm63xx-spi: add reset support

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Message-ID: <141ae52bdd22079ae5f88dd50c31cac2cc150676.camel@pengutronix.de>
Date:   Mon, 15 Jun 2020 10:12:57 +0200
From:   Philipp Zabel <p.zabel@...gutronix.de>
To:     Álvaro Fernández Rojas <noltari@...il.com>,
        broonie@...nel.org, f.fainelli@...il.com,
        bcm-kernel-feedback-list@...adcom.com, linux-spi@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 1/4] spi: bcm63xx-spi: add reset support

Hi Álvaro,

On Mon, 2020-06-15 at 10:03 +0200, Álvaro Fernández Rojas wrote:
> bcm63xx arch resets the SPI controller at early boot. However, bmips arch
> needs to perform a reset when probing the driver.
> 
> Signed-off-by: Álvaro Fernández Rojas <noltari@...il.com>
> ---
>  drivers/spi/spi-bcm63xx.c | 17 +++++++++++++++++
>  1 file changed, 17 insertions(+)
> 
> diff --git a/drivers/spi/spi-bcm63xx.c b/drivers/spi/spi-bcm63xx.c
> index 0f1b10a4ef0c..8ab04affaf7b 100644
> --- a/drivers/spi/spi-bcm63xx.c
> +++ b/drivers/spi/spi-bcm63xx.c
> @@ -18,6 +18,7 @@
>  #include <linux/err.h>
>  #include <linux/pm_runtime.h>
>  #include <linux/of.h>
> +#include <linux/reset.h>
>  
>  /* BCM 6338/6348 SPI core */
>  #define SPI_6348_RSET_SIZE		64
> @@ -493,6 +494,7 @@ static int bcm63xx_spi_probe(struct platform_device *pdev)
>  	struct bcm63xx_spi *bs;
>  	int ret;
>  	u32 num_cs = BCM63XX_SPI_MAX_CS;
> +	struct reset_control *reset;
>  
>  	if (dev->of_node) {
>  		const struct of_device_id *match;
> @@ -529,6 +531,15 @@ static int bcm63xx_spi_probe(struct platform_device *pdev)
>  		return PTR_ERR(clk);
>  	}
>  
> +	reset = devm_reset_control_get(dev, NULL);

Please use devm_reset_control_get_exclusive(), same for patch 3.
With that changed,

Reviewed-by: Philipp Zabel <p.zabel@...gutronix.de>

regards
Philipp