Linux-SPI Archive on lore.kernel.org
 help / color / Atom feed
From: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
To: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>,
	Andi Shyti <andi@etezian.org>, Mark Brown <broonie@kernel.org>,
	linux-spi@vger.kernel.org, linux-samsung-soc@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org
Cc: Marek Szyprowski <m.szyprowski@samsung.com>,
	Sylwester Nawrocki <snawrocki@kernel.org>
Subject: [PATCH 3/3] spi: s3c64xx: constify driver/match data
Date: Wed, 14 Apr 2021 22:33:43 +0200
Message-ID: <20210414203343.203119-3-krzysztof.kozlowski@canonical.com> (raw)
In-Reply-To: <20210414203343.203119-1-krzysztof.kozlowski@canonical.com>

The match data (struct s3c64xx_spi_port_config) stored in of_device_id
and platform_device_id tables is not modified by the driver and can be
handled entirely in a const-way to increase the code safety.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
---
 drivers/spi/spi-s3c64xx.c | 21 ++++++++++-----------
 1 file changed, 10 insertions(+), 11 deletions(-)

diff --git a/drivers/spi/spi-s3c64xx.c b/drivers/spi/spi-s3c64xx.c
index eac3c300f806..8755cd85e83c 100644
--- a/drivers/spi/spi-s3c64xx.c
+++ b/drivers/spi/spi-s3c64xx.c
@@ -190,7 +190,7 @@ struct s3c64xx_spi_driver_data {
 	unsigned                        cur_speed;
 	struct s3c64xx_spi_dma_data	rx_dma;
 	struct s3c64xx_spi_dma_data	tx_dma;
-	struct s3c64xx_spi_port_config	*port_conf;
+	const struct s3c64xx_spi_port_config	*port_conf;
 	unsigned int			port_id;
 };
 
@@ -1049,15 +1049,14 @@ static struct s3c64xx_spi_info *s3c64xx_spi_parse_dt(struct device *dev)
 }
 #endif
 
-static inline struct s3c64xx_spi_port_config *s3c64xx_spi_get_port_config(
+static inline const struct s3c64xx_spi_port_config *s3c64xx_spi_get_port_config(
 						struct platform_device *pdev)
 {
 #ifdef CONFIG_OF
 	if (pdev->dev.of_node)
-		return (struct s3c64xx_spi_port_config *)of_device_get_match_data(&pdev->dev);
+		return of_device_get_match_data(&pdev->dev);
 #endif
-	return (struct s3c64xx_spi_port_config *)
-			 platform_get_device_id(pdev)->driver_data;
+	return (const struct s3c64xx_spi_port_config *)platform_get_device_id(pdev)->driver_data;
 }
 
 static int s3c64xx_spi_probe(struct platform_device *pdev)
@@ -1395,27 +1394,27 @@ static const struct dev_pm_ops s3c64xx_spi_pm = {
 			   s3c64xx_spi_runtime_resume, NULL)
 };
 
-static struct s3c64xx_spi_port_config s3c2443_spi_port_config = {
+static const struct s3c64xx_spi_port_config s3c2443_spi_port_config = {
 	.fifo_lvl_mask	= { 0x7f },
 	.rx_lvl_offset	= 13,
 	.tx_st_done	= 21,
 	.high_speed	= true,
 };
 
-static struct s3c64xx_spi_port_config s3c6410_spi_port_config = {
+static const struct s3c64xx_spi_port_config s3c6410_spi_port_config = {
 	.fifo_lvl_mask	= { 0x7f, 0x7F },
 	.rx_lvl_offset	= 13,
 	.tx_st_done	= 21,
 };
 
-static struct s3c64xx_spi_port_config s5pv210_spi_port_config = {
+static const struct s3c64xx_spi_port_config s5pv210_spi_port_config = {
 	.fifo_lvl_mask	= { 0x1ff, 0x7F },
 	.rx_lvl_offset	= 15,
 	.tx_st_done	= 25,
 	.high_speed	= true,
 };
 
-static struct s3c64xx_spi_port_config exynos4_spi_port_config = {
+static const struct s3c64xx_spi_port_config exynos4_spi_port_config = {
 	.fifo_lvl_mask	= { 0x1ff, 0x7F, 0x7F },
 	.rx_lvl_offset	= 15,
 	.tx_st_done	= 25,
@@ -1424,7 +1423,7 @@ static struct s3c64xx_spi_port_config exynos4_spi_port_config = {
 	.quirks		= S3C64XX_SPI_QUIRK_CS_AUTO,
 };
 
-static struct s3c64xx_spi_port_config exynos7_spi_port_config = {
+static const struct s3c64xx_spi_port_config exynos7_spi_port_config = {
 	.fifo_lvl_mask	= { 0x1ff, 0x7F, 0x7F, 0x7F, 0x7F, 0x1ff},
 	.rx_lvl_offset	= 15,
 	.tx_st_done	= 25,
@@ -1433,7 +1432,7 @@ static struct s3c64xx_spi_port_config exynos7_spi_port_config = {
 	.quirks		= S3C64XX_SPI_QUIRK_CS_AUTO,
 };
 
-static struct s3c64xx_spi_port_config exynos5433_spi_port_config = {
+static const struct s3c64xx_spi_port_config exynos5433_spi_port_config = {
 	.fifo_lvl_mask	= { 0x1ff, 0x7f, 0x7f, 0x7f, 0x7f, 0x1ff},
 	.rx_lvl_offset	= 15,
 	.tx_st_done	= 25,
-- 
2.25.1


  parent reply index

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-14 20:33 [PATCH 1/3] spi: s3c64xx: simplify getting of_device_id match data Krzysztof Kozlowski
2021-04-14 20:33 ` [PATCH 2/3] spi: s3c64xx: correct kerneldoc of s3c64xx_spi_port_config Krzysztof Kozlowski
2021-04-15  9:53   ` Sylwester Nawrocki
2021-04-14 20:33 ` Krzysztof Kozlowski [this message]
2021-04-15  9:54   ` [PATCH 3/3] spi: s3c64xx: constify driver/match data Sylwester Nawrocki
2021-04-15  9:48 ` [PATCH 1/3] spi: s3c64xx: simplify getting of_device_id match data Sylwester Nawrocki
2021-04-15 18:33 ` Mark Brown

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20210414203343.203119-3-krzysztof.kozlowski@canonical.com \
    --to=krzysztof.kozlowski@canonical.com \
    --cc=andi@etezian.org \
    --cc=broonie@kernel.org \
    --cc=linux-arm-kernel@lists.infradead.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-samsung-soc@vger.kernel.org \
    --cc=linux-spi@vger.kernel.org \
    --cc=m.szyprowski@samsung.com \
    --cc=snawrocki@kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

Linux-SPI Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/linux-spi/0 linux-spi/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 linux-spi linux-spi/ https://lore.kernel.org/linux-spi \
		linux-spi@vger.kernel.org
	public-inbox-index linux-spi

Example config snippet for mirrors

Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.kernel.vger.linux-spi


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git