Message-ID: <e068c541-b492-a513-6212-fd698e4fc9c4@foss.st.com>
Date:   Mon, 23 Jan 2023 18:16:33 +0100
MIME-Version: 1.0
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101
 Thunderbird/102.4.2
Subject: Re: [PATCH v2 02/13] spi: Replace all spi->chip_select and
 spi->cs_gpiod references with function call
To:     Amit Kumar Mahapatra <amit.kumar-mahapatra@amd.com>,
        <broonie@kernel.org>, <miquel.raynal@bootlin.com>,
        <richard@nod.at>, <vigneshr@ti.com>, <jic23@kernel.org>,
        <tudor.ambarus@microchip.com>, <pratyush@kernel.org>,
        <sanju.mehta@amd.com>, <chin-ting_kuo@aspeedtech.com>,
        <clg@kaod.org>, <kdasu.kdev@gmail.com>, <f.fainelli@gmail.com>,
        <rjui@broadcom.com>, <sbranden@broadcom.com>,
        <eajames@linux.ibm.com>, <olteanv@gmail.com>, <han.xu@nxp.com>,
        <john.garry@huawei.com>, <shawnguo@kernel.org>,
        <s.hauer@pengutronix.de>, <narmstrong@baylibre.com>,
        <khilman@baylibre.com>, <matthias.bgg@gmail.com>,
        <haibo.chen@nxp.com>, <linus.walleij@linaro.org>,
        <daniel@zonque.org>, <haojian.zhuang@gmail.com>,
        <robert.jarzmik@free.fr>, <agross@kernel.org>,
        <bjorn.andersson@linaro.org>, <heiko@sntech.de>,
        <krzysztof.kozlowski@linaro.org>, <andi@etezian.org>,
        <mcoquelin.stm32@gmail.com>, <alexandre.torgue@foss.st.com>,
        <wens@csie.org>, <jernej.skrabec@gmail.com>, <samuel@sholland.org>,
        <masahisa.kojima@linaro.org>, <jaswinder.singh@linaro.org>,
        <rostedt@goodmis.org>, <mingo@redhat.com>,
        <l.stelmach@samsung.com>, <davem@davemloft.net>,
        <edumazet@google.com>, <kuba@kernel.org>, <pabeni@redhat.com>,
        <alex.aring@gmail.com>, <stefan@datenfreihafen.org>,
        <kvalo@kernel.org>, <thierry.reding@gmail.com>,
        <jonathanh@nvidia.com>, <skomatineni@nvidia.com>,
        <sumit.semwal@linaro.org>, <christian.koenig@amd.com>,
        <j.neuschaefer@gmx.net>, <vireshk@kernel.org>, <rmfrfs@gmail.com>,
        <johan@kernel.org>, <elder@kernel.org>,
        <gregkh@linuxfoundation.org>
CC:     <git@amd.com>, <linux-spi@vger.kernel.org>,
        <linux-kernel@vger.kernel.org>, <joel@jms.id.au>,
        <andrew@aj.id.au>, <radu_nicolae.pirea@upb.ro>,
        <nicolas.ferre@microchip.com>, <alexandre.belloni@bootlin.com>,
        <claudiu.beznea@microchip.com>,
        <bcm-kernel-feedback-list@broadcom.com>, <fancer.lancer@gmail.com>,
        <kernel@pengutronix.de>, <festevam@gmail.com>, <linux-imx@nxp.com>,
        <jbrunet@baylibre.com>, <martin.blumenstingl@googlemail.com>,
        <avifishman70@gmail.com>, <tmaimon77@gmail.com>,
        <tali.perry1@gmail.com>, <venture@google.com>, <yuenn@google.com>,
        <benjaminfair@google.com>, <yogeshgaur.83@gmail.com>,
        <konrad.dybcio@somainline.org>, <alim.akhtar@samsung.com>,
        <ldewangan@nvidia.com>, <michal.simek@amd.com>,
        <linux-aspeed@lists.ozlabs.org>, <openbmc@lists.ozlabs.org>,
        <linux-arm-kernel@lists.infradead.org>,
        <linux-rpi-kernel@lists.infradead.org>,
        <linux-amlogic@lists.infradead.org>,
        <linux-mediatek@lists.infradead.org>,
        <linux-arm-msm@vger.kernel.org>,
        <linux-rockchip@lists.infradead.org>,
        <linux-samsung-soc@vger.kernel.org>,
        <linux-stm32@st-md-mailman.stormreply.com>,
        <linux-sunxi@lists.linux.dev>, <linux-tegra@vger.kernel.org>,
        <netdev@vger.kernel.org>, <linux-wpan@vger.kernel.org>,
        <libertas-dev@lists.infradead.org>,
        <linux-wireless@vger.kernel.org>, <linux-mtd@lists.infradead.org>,
        <lars@metafoo.de>, <Michael.Hennerich@analog.com>,
        <linux-iio@vger.kernel.org>, <michael@walle.cc>,
        <palmer@dabbelt.com>, <linux-riscv@lists.infradead.org>,
        <linux-media@vger.kernel.org>, <dri-devel@lists.freedesktop.org>,
        <greybus-dev@lists.linaro.org>, <linux-staging@lists.linux.dev>,
        <amitrkcian2002@gmail.com>
References: <20230119185342.2093323-1-amit.kumar-mahapatra@amd.com>
 <20230119185342.2093323-3-amit.kumar-mahapatra@amd.com>
Content-Language: en-US
From:   Patrice CHOTARD <patrice.chotard@foss.st.com>
In-Reply-To: <20230119185342.2093323-3-amit.kumar-mahapatra@amd.com>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: 7bit
Precedence: bulk

Hi Amit

On 1/19/23 19:53, Amit Kumar Mahapatra wrote:
> Supporting multi-cs in spi drivers would require the chip_select & cs_gpiod
> members of struct spi_device to be an array. But changing the type of these
> members to array would break the spi driver functionality. To make the
> transition smoother introduced four new APIs to get/set the
> spi->chip_select & spi->cs_gpiod and replaced all spi->chip_select and
> spi->cs_gpiod references with get or set API calls.
> While adding multi-cs support in further patches the chip_select & cs_gpiod
> members of the spi_device structure would be converted to arrays & the
> "idx" parameter of the APIs would be used as array index i.e.,
> spi->chip_select[idx] & spi->cs_gpiod[idx] respectively.
> 
> Signed-off-by: Amit Kumar Mahapatra <amit.kumar-mahapatra@amd.com>
> ---

[...]

>  drivers/spi/spi-stm32-qspi.c      | 12 ++++++------

[...]

> diff --git a/drivers/spi/spi-stm32-qspi.c b/drivers/spi/spi-stm32-qspi.c
> index 9131660c1afb..b9e61372dcfb 100644
> --- a/drivers/spi/spi-stm32-qspi.c
> +++ b/drivers/spi/spi-stm32-qspi.c
> @@ -359,7 +359,7 @@ static int stm32_qspi_get_mode(u8 buswidth)
>  static int stm32_qspi_send(struct spi_device *spi, const struct spi_mem_op *op)
>  {
>  	struct stm32_qspi *qspi = spi_controller_get_devdata(spi->master);
> -	struct stm32_qspi_flash *flash = &qspi->flash[spi->chip_select];
> +	struct stm32_qspi_flash *flash = &qspi->flash[spi_get_chipselect(spi, 0)];
>  	u32 ccr, cr;
>  	int timeout, err = 0, err_poll_status = 0;
>  
> @@ -564,7 +564,7 @@ static int stm32_qspi_transfer_one_message(struct spi_controller *ctrl,
>  	struct spi_mem_op op;
>  	int ret = 0;
>  
> -	if (!spi->cs_gpiod)
> +	if (!spi_get_csgpiod(spi, 0))
>  		return -EOPNOTSUPP;
>  
>  	ret = pm_runtime_resume_and_get(qspi->dev);
> @@ -573,7 +573,7 @@ static int stm32_qspi_transfer_one_message(struct spi_controller *ctrl,
>  
>  	mutex_lock(&qspi->lock);
>  
> -	gpiod_set_value_cansleep(spi->cs_gpiod, true);
> +	gpiod_set_value_cansleep(spi_get_csgpiod(spi, 0), true);
>  
>  	list_for_each_entry(transfer, &msg->transfers, transfer_list) {
>  		u8 dummy_bytes = 0;
> @@ -626,7 +626,7 @@ static int stm32_qspi_transfer_one_message(struct spi_controller *ctrl,
>  	}
>  
>  end_of_transfer:
> -	gpiod_set_value_cansleep(spi->cs_gpiod, false);
> +	gpiod_set_value_cansleep(spi_get_csgpiod(spi, 0), false);
>  
>  	mutex_unlock(&qspi->lock);
>  
> @@ -669,8 +669,8 @@ static int stm32_qspi_setup(struct spi_device *spi)
>  
>  	presc = DIV_ROUND_UP(qspi->clk_rate, spi->max_speed_hz) - 1;
>  
> -	flash = &qspi->flash[spi->chip_select];
> -	flash->cs = spi->chip_select;
> +	flash = &qspi->flash[spi_get_chipselect(spi, 0)];
> +	flash->cs = spi_get_chipselect(spi, 0);
>  	flash->presc = presc;
>  
>  	mutex_lock(&qspi->lock);

Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>

Thanks
Patrice