[PATCH v1 0/3] mfd: Initialize spi_device_id arrays using member names

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* [PATCH v1 0/3] mfd: Initialize spi_device_id arrays using member names
@ 2026-07-02 14:53 Uwe Kleine-König (The Capable Hub)
  2026-07-02 14:53 ` [PATCH v1 2/3] " Uwe Kleine-König (The Capable Hub)
  0 siblings, 1 reply; 2+ messages in thread
From: Uwe Kleine-König (The Capable Hub) @ 2026-07-02 14:53 UTC (permalink / raw)
  To: Lee Jones
  Cc: Colin Foster, linux-kernel, James Ogletree, Fred Treven,
	Ben Bright, Support Opensource, Xu Yilun, Tom Rix, Charles Keepax,
	Richard Fitzgerald, Maxime Coquelin, Alexandre Torgue, patches,
	linux-sound, linux-stm32, linux-arm-kernel, Orson Zhai,
	Baolin Wang, Chunyan Zhang

Hello,

this series targets to use named initializers for spi_device_id arrays.
In general these are better readable for humans and more robust to
changes in the respective struct definition.

This robustness is needed as I want to do

	diff --git a/include/linux/device-id/spi.h b/include/linux/device-id/spi.h
	index 812e7c3854a7..93d9cd45569a 100644
	--- a/include/linux/device-id/spi.h
	+++ b/include/linux/device-id/spi.h
	@@ -13,7 +13,11 @@ typedef unsigned long kernel_ulong_t;
	 
	 struct spi_device_id {
		char name[SPI_NAME_SIZE];
	-	kernel_ulong_t driver_data;	/* Data private to the driver */
	+	union {
	+		/* Data private to the driver */
	+		kernel_ulong_t driver_data;
	+		const void *driver_data_ptr;
	+	};
	 };
	 
	 #endif /* ifndef LINUX_MOD_DEVICE_ID_SPI_H */

which allows dropping several casts and eases porting CHERI to mainline
Linux. A possible follow-up change is the following example:

	diff --git a/drivers/mfd/intel-m10-bmc-spi.c b/drivers/mfd/intel-m10-bmc-spi.c
	index 94b9c99bb4f8..28a3cc84b778 100644
	--- a/drivers/mfd/intel-m10-bmc-spi.c
	+++ b/drivers/mfd/intel-m10-bmc-spi.c
	@@ -70,7 +70,7 @@ static int intel_m10_bmc_spi_probe(struct spi_device *spi)
		if (!ddata)
			return -ENOMEM;
	 
	-	info = (struct intel_m10bmc_platform_info *)id->driver_data;
	+	info = id->driver_data_ptr;
		ddata->dev = dev;
	 
		ddata->regmap = devm_regmap_init_spi_avmm(spi, &intel_m10bmc_regmap_config);
	@@ -160,9 +160,9 @@ static const struct intel_m10bmc_platform_info m10bmc_spi_n5010 = {
	 };
	 
	 static const struct spi_device_id m10bmc_spi_id[] = {
	-	{ .name = "m10-n3000", .driver_data = (kernel_ulong_t)&m10bmc_spi_n3000 },
	-	{ .name = "m10-d5005", .driver_data = (kernel_ulong_t)&m10bmc_spi_d5005 },
	-	{ .name = "m10-n5010", .driver_data = (kernel_ulong_t)&m10bmc_spi_n5010 },
	+	{ .name = "m10-n3000", .driver_data_ptr = &m10bmc_spi_n3000 },
	+	{ .name = "m10-d5005", .driver_data_ptr = &m10bmc_spi_d5005 },
	+	{ .name = "m10-n5010", .driver_data_ptr = &m10bmc_spi_n5010 },
		{ }
	 };
	 MODULE_DEVICE_TABLE(spi, m10bmc_spi_id);

increasing readability due to less explicit casting. This also yields
tighter type checking as the assignment in the first hunk results in a
warning if info wasn't a pointer to a const type.

If you consider the last patch mostly churn, just drop it.

There are no dependencies between the patches, and they are merge window
material.

Best regards
Uwe

Uwe Kleine-König (The Capable Hub) (3):
  mfd: Drop unused assignment of spi_device_id driver data
  mfd: Initialize spi_device_id arrays using member names
  mfd: Unify style of spi_device_id arrays

 drivers/mfd/altera-a10sr.c      |  2 +-
 drivers/mfd/arizona-spi.c       | 12 ++++++------
 drivers/mfd/cs40l50-spi.c       |  4 ++--
 drivers/mfd/da9052-spi.c        | 12 ++++++------
 drivers/mfd/intel-m10-bmc-spi.c |  6 +++---
 drivers/mfd/madera-spi.c        | 18 +++++++++---------
 drivers/mfd/motorola-cpcap.c    |  6 +++---
 drivers/mfd/ocelot-spi.c        |  2 +-
 drivers/mfd/rk8xx-spi.c         |  2 +-
 drivers/mfd/rsmu_spi.c          | 12 ++++++------
 drivers/mfd/sprd-sc27xx-spi.c   |  2 +-
 drivers/mfd/stmpe-spi.c         | 12 ++++++------
 drivers/mfd/tps65912-spi.c      |  2 +-
 drivers/mfd/wm831x-spi.c        | 16 ++++++++--------
 14 files changed, 54 insertions(+), 54 deletions(-)


base-commit: 4f441960e691d37c880d2cc004de06bb5b6bd5e4
-- 
2.55.0.11.g153666a7d9bb



^ permalink raw reply	[flat|nested] 2+ messages in thread

* [PATCH v1 2/3] mfd: Initialize spi_device_id arrays using member names
  2026-07-02 14:53 [PATCH v1 0/3] mfd: Initialize spi_device_id arrays using member names Uwe Kleine-König (The Capable Hub)
@ 2026-07-02 14:53 ` Uwe Kleine-König (The Capable Hub)
  0 siblings, 0 replies; 2+ messages in thread
From: Uwe Kleine-König (The Capable Hub) @ 2026-07-02 14:53 UTC (permalink / raw)
  To: Lee Jones
  Cc: James Ogletree, Fred Treven, Ben Bright, Support Opensource,
	Xu Yilun, Tom Rix, Charles Keepax, Richard Fitzgerald,
	Maxime Coquelin, Alexandre Torgue, patches, linux-kernel,
	linux-sound, linux-stm32, linux-arm-kernel

While being less compact, using named initializers allows to more easily
see which members of the structs are assigned which value without having
to lookup the declaration of the struct. And it's also more robust
against changes to the struct definition.

The mentioned robustness is relevant for a planned change to struct
spi_device_id that replaces .driver_data by an anonymous union.

Also adapt spacing and usage of commas to the most common style.

This patch doesn't modify the compiled array, only its representation
in source form benefits.

Signed-off-by: Uwe Kleine-König (The Capable Hub) <u.kleine-koenig@baylibre.com>
---
 drivers/mfd/arizona-spi.c       | 12 ++++++------
 drivers/mfd/cs40l50-spi.c       |  4 ++--
 drivers/mfd/da9052-spi.c        | 12 ++++++------
 drivers/mfd/intel-m10-bmc-spi.c |  6 +++---
 drivers/mfd/madera-spi.c        | 18 +++++++++---------
 drivers/mfd/rsmu_spi.c          | 12 ++++++------
 drivers/mfd/stmpe-spi.c         | 12 ++++++------
 drivers/mfd/wm831x-spi.c        | 16 ++++++++--------
 8 files changed, 46 insertions(+), 46 deletions(-)

diff --git a/drivers/mfd/arizona-spi.c b/drivers/mfd/arizona-spi.c
index eaa2b2bc5dd0..04baf5a1c652 100644
--- a/drivers/mfd/arizona-spi.c
+++ b/drivers/mfd/arizona-spi.c
@@ -255,12 +255,12 @@ static void arizona_spi_remove(struct spi_device *spi)
 }
 
 static const struct spi_device_id arizona_spi_ids[] = {
-	{ "wm5102", WM5102 },
-	{ "wm5110", WM5110 },
-	{ "wm8280", WM8280 },
-	{ "wm1831", WM1831 },
-	{ "cs47l24", CS47L24 },
-	{ },
+	{ .name = "wm5102", .driver_data = WM5102 },
+	{ .name = "wm5110", .driver_data = WM5110 },
+	{ .name = "wm8280", .driver_data = WM8280 },
+	{ .name = "wm1831", .driver_data = WM1831 },
+	{ .name = "cs47l24", .driver_data = CS47L24 },
+	{ }
 };
 MODULE_DEVICE_TABLE(spi, arizona_spi_ids);
 
diff --git a/drivers/mfd/cs40l50-spi.c b/drivers/mfd/cs40l50-spi.c
index 53526b595a0d..a635951ca6b7 100644
--- a/drivers/mfd/cs40l50-spi.c
+++ b/drivers/mfd/cs40l50-spi.c
@@ -40,8 +40,8 @@ static void cs40l50_spi_remove(struct spi_device *spi)
 }
 
 static const struct spi_device_id cs40l50_id_spi[] = {
-	{ "cs40l50" },
-	{}
+	{ .name = "cs40l50" },
+	{ }
 };
 MODULE_DEVICE_TABLE(spi, cs40l50_id_spi);
 
diff --git a/drivers/mfd/da9052-spi.c b/drivers/mfd/da9052-spi.c
index be5f2b34e18a..29cf2c17fde1 100644
--- a/drivers/mfd/da9052-spi.c
+++ b/drivers/mfd/da9052-spi.c
@@ -63,12 +63,12 @@ static void da9052_spi_remove(struct spi_device *spi)
 }
 
 static const struct spi_device_id da9052_spi_id[] = {
-	{"da9052", DA9052},
-	{"da9053-aa", DA9053_AA},
-	{"da9053-ba", DA9053_BA},
-	{"da9053-bb", DA9053_BB},
-	{"da9053-bc", DA9053_BC},
-	{}
+	{ .name = "da9052", .driver_data = DA9052 },
+	{ .name = "da9053-aa", .driver_data = DA9053_AA },
+	{ .name = "da9053-ba", .driver_data = DA9053_BA },
+	{ .name = "da9053-bb", .driver_data = DA9053_BB },
+	{ .name = "da9053-bc", .driver_data = DA9053_BC },
+	{ }
 };
 
 static struct spi_driver da9052_spi_driver = {
diff --git a/drivers/mfd/intel-m10-bmc-spi.c b/drivers/mfd/intel-m10-bmc-spi.c
index cfa620f0c70e..94b9c99bb4f8 100644
--- a/drivers/mfd/intel-m10-bmc-spi.c
+++ b/drivers/mfd/intel-m10-bmc-spi.c
@@ -160,9 +160,9 @@ static const struct intel_m10bmc_platform_info m10bmc_spi_n5010 = {
 };
 
 static const struct spi_device_id m10bmc_spi_id[] = {
-	{ "m10-n3000", (kernel_ulong_t)&m10bmc_spi_n3000 },
-	{ "m10-d5005", (kernel_ulong_t)&m10bmc_spi_d5005 },
-	{ "m10-n5010", (kernel_ulong_t)&m10bmc_spi_n5010 },
+	{ .name = "m10-n3000", .driver_data = (kernel_ulong_t)&m10bmc_spi_n3000 },
+	{ .name = "m10-d5005", .driver_data = (kernel_ulong_t)&m10bmc_spi_d5005 },
+	{ .name = "m10-n5010", .driver_data = (kernel_ulong_t)&m10bmc_spi_n5010 },
 	{ }
 };
 MODULE_DEVICE_TABLE(spi, m10bmc_spi_id);
diff --git a/drivers/mfd/madera-spi.c b/drivers/mfd/madera-spi.c
index ce9e90322c9c..3fffa21ceadc 100644
--- a/drivers/mfd/madera-spi.c
+++ b/drivers/mfd/madera-spi.c
@@ -112,15 +112,15 @@ static void madera_spi_remove(struct spi_device *spi)
 }
 
 static const struct spi_device_id madera_spi_ids[] = {
-	{ "cs47l15", CS47L15 },
-	{ "cs47l35", CS47L35 },
-	{ "cs47l85", CS47L85 },
-	{ "cs47l90", CS47L90 },
-	{ "cs47l91", CS47L91 },
-	{ "cs42l92", CS42L92 },
-	{ "cs47l92", CS47L92 },
-	{ "cs47l93", CS47L93 },
-	{ "wm1840", WM1840 },
+	{ .name = "cs47l15", .driver_data = CS47L15 },
+	{ .name = "cs47l35", .driver_data = CS47L35 },
+	{ .name = "cs47l85", .driver_data = CS47L85 },
+	{ .name = "cs47l90", .driver_data = CS47L90 },
+	{ .name = "cs47l91", .driver_data = CS47L91 },
+	{ .name = "cs42l92", .driver_data = CS42L92 },
+	{ .name = "cs47l92", .driver_data = CS47L92 },
+	{ .name = "cs47l93", .driver_data = CS47L93 },
+	{ .name = "wm1840", .driver_data = WM1840 },
 	{ }
 };
 MODULE_DEVICE_TABLE(spi, madera_spi_ids);
diff --git a/drivers/mfd/rsmu_spi.c b/drivers/mfd/rsmu_spi.c
index e07f21482439..cdb0f9797ec6 100644
--- a/drivers/mfd/rsmu_spi.c
+++ b/drivers/mfd/rsmu_spi.c
@@ -239,12 +239,12 @@ static void rsmu_spi_remove(struct spi_device *client)
 }
 
 static const struct spi_device_id rsmu_spi_id[] = {
-	{ "8a34000",  RSMU_CM },
-	{ "8a34001",  RSMU_CM },
-	{ "8a34002",  RSMU_CM },
-	{ "82p33810", RSMU_SABRE },
-	{ "82p33811", RSMU_SABRE },
-	{}
+	{ .name = "8a34000", .driver_data = RSMU_CM },
+	{ .name = "8a34001", .driver_data = RSMU_CM },
+	{ .name = "8a34002", .driver_data = RSMU_CM },
+	{ .name = "82p33810", .driver_data = RSMU_SABRE },
+	{ .name = "82p33811", .driver_data = RSMU_SABRE },
+	{ }
 };
 MODULE_DEVICE_TABLE(spi, rsmu_spi_id);
 
diff --git a/drivers/mfd/stmpe-spi.c b/drivers/mfd/stmpe-spi.c
index dea31efface6..22a3da062dee 100644
--- a/drivers/mfd/stmpe-spi.c
+++ b/drivers/mfd/stmpe-spi.c
@@ -121,12 +121,12 @@ static const struct of_device_id stmpe_spi_of_match[] = {
 MODULE_DEVICE_TABLE(of, stmpe_spi_of_match);
 
 static const struct spi_device_id stmpe_spi_id[] = {
-	{ "stmpe610", STMPE610 },
-	{ "stmpe801", STMPE801 },
-	{ "stmpe811", STMPE811 },
-	{ "stmpe1601", STMPE1601 },
-	{ "stmpe2401", STMPE2401 },
-	{ "stmpe2403", STMPE2403 },
+	{ .name = "stmpe610", .driver_data = STMPE610 },
+	{ .name = "stmpe801", .driver_data = STMPE801 },
+	{ .name = "stmpe811", .driver_data = STMPE811 },
+	{ .name = "stmpe1601", .driver_data = STMPE1601 },
+	{ .name = "stmpe2401", .driver_data = STMPE2401 },
+	{ .name = "stmpe2403", .driver_data = STMPE2403 },
 	{ }
 };
 MODULE_DEVICE_TABLE(spi, stmpe_spi_id);
diff --git a/drivers/mfd/wm831x-spi.c b/drivers/mfd/wm831x-spi.c
index 54c87267917b..1e519fd9a9e1 100644
--- a/drivers/mfd/wm831x-spi.c
+++ b/drivers/mfd/wm831x-spi.c
@@ -77,14 +77,14 @@ static const struct dev_pm_ops wm831x_spi_pm = {
 };
 
 static const struct spi_device_id wm831x_spi_ids[] = {
-	{ "wm8310", WM8310 },
-	{ "wm8311", WM8311 },
-	{ "wm8312", WM8312 },
-	{ "wm8320", WM8320 },
-	{ "wm8321", WM8321 },
-	{ "wm8325", WM8325 },
-	{ "wm8326", WM8326 },
-	{ },
+	{ .name = "wm8310", .driver_data = WM8310 },
+	{ .name = "wm8311", .driver_data = WM8311 },
+	{ .name = "wm8312", .driver_data = WM8312 },
+	{ .name = "wm8320", .driver_data = WM8320 },
+	{ .name = "wm8321", .driver_data = WM8321 },
+	{ .name = "wm8325", .driver_data = WM8325 },
+	{ .name = "wm8326", .driver_data = WM8326 },
+	{ }
 };
 
 static struct spi_driver wm831x_spi_driver = {
-- 
2.55.0.11.g153666a7d9bb



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2026-07-02 14:53 ` [PATCH v1 2/3] " Uwe Kleine-König (The Capable Hub)

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