linux-kernel - [PATCH RFT 3/6] mfd: vexpress-sysreg: set-up software nodes for gpio-mmio

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Message-Id: <20250624-gpio-mmio-pdata-v1-3-a58c72eb556a@linaro.org>
Date: Tue, 24 Jun 2025 15:19:14 +0200
From: Bartosz Golaszewski <brgl@...ev.pl>
To: Linus Walleij <linus.walleij@...aro.org>, 
 Bartosz Golaszewski <brgl@...ev.pl>, Lee Jones <lee@...nel.org>, 
 Liviu Dudau <liviu.dudau@....com>, Sudeep Holla <sudeep.holla@....com>, 
 Lorenzo Pieralisi <lpieralisi@...nel.org>, 
 Aaro Koskinen <aaro.koskinen@....fi>, 
 Janusz Krzysztofik <jmkrzyszt@...il.com>, Tony Lindgren <tony@...mide.com>, 
 Russell King <linux@...linux.org.uk>, Krzysztof Kozlowski <krzk@...nel.org>, 
 Alim Akhtar <alim.akhtar@...sung.com>
Cc: linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org, 
 linux-arm-kernel@...ts.infradead.org, linux-omap@...r.kernel.org, 
 patches@...nsource.cirrus.com, linux-samsung-soc@...r.kernel.org, 
 Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
Subject: [PATCH RFT 3/6] mfd: vexpress-sysreg: set-up software nodes for
 gpio-mmio

From: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>

Replace struct bgpio_pdata - that we plan to remove - with software
nodes containing properties encoding the same values thatr can now be
parsed by gpio-mmio.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
---
 drivers/mfd/vexpress-sysreg.c | 46 ++++++++++++++++++++++++++-----------------
 1 file changed, 28 insertions(+), 18 deletions(-)

diff --git a/drivers/mfd/vexpress-sysreg.c b/drivers/mfd/vexpress-sysreg.c
index ef03d6cec9ff6927668d051ca459eb1d8ff7269e..fc2daffc4352cca763cefbf6e17bdd5242290198 100644
--- a/drivers/mfd/vexpress-sysreg.c
+++ b/drivers/mfd/vexpress-sysreg.c
@@ -11,6 +11,7 @@
 #include <linux/module.h>
 #include <linux/of_platform.h>
 #include <linux/platform_device.h>
+#include <linux/property.h>
 #include <linux/slab.h>
 #include <linux/stat.h>
 
@@ -37,22 +38,34 @@
 
 /* The sysreg block is just a random collection of various functions... */
 
-static struct bgpio_pdata vexpress_sysreg_sys_led_pdata = {
-	.label = "sys_led",
-	.base = -1,
-	.ngpio = 8,
+static const struct property_entry vexpress_sysreg_sys_led_props[] = {
+	PROPERTY_ENTRY_STRING("label", "sys_led"),
+	PROPERTY_ENTRY_U32("ngpios", 8),
+	{ }
 };
 
-static struct bgpio_pdata vexpress_sysreg_sys_mci_pdata = {
-	.label = "sys_mci",
-	.base = -1,
-	.ngpio = 2,
+static const struct software_node vexpress_sysreg_sys_led_swnode = {
+	.properties = vexpress_sysreg_sys_led_props,
 };
 
-static struct bgpio_pdata vexpress_sysreg_sys_flash_pdata = {
-	.label = "sys_flash",
-	.base = -1,
-	.ngpio = 1,
+static const struct property_entry vexpress_sysreg_sys_mci_props[] = {
+	PROPERTY_ENTRY_STRING("label", "sys_mci"),
+	PROPERTY_ENTRY_U32("ngpios", 2),
+	{ }
+};
+
+static const struct software_node vexpress_sysreg_sys_mci_swnode = {
+	.properties = vexpress_sysreg_sys_mci_props,
+};
+
+static const struct property_entry vexpress_sysreg_sys_flash_props[] = {
+	PROPERTY_ENTRY_STRING("label", "sys_flash"),
+	PROPERTY_ENTRY_U32("ngpios", 1),
+	{ }
+};
+
+static const struct software_node vexpress_sysreg_sys_flash_swnode = {
+	.properties = vexpress_sysreg_sys_flash_props,
 };
 
 static struct mfd_cell vexpress_sysreg_cells[] = {
@@ -61,22 +74,19 @@ static struct mfd_cell vexpress_sysreg_cells[] = {
 		.of_compatible = "arm,vexpress-sysreg,sys_led",
 		.num_resources = 1,
 		.resources = &DEFINE_RES_MEM_NAMED(SYS_LED, 0x4, "dat"),
-		.platform_data = &vexpress_sysreg_sys_led_pdata,
-		.pdata_size = sizeof(vexpress_sysreg_sys_led_pdata),
+		.swnode = &vexpress_sysreg_sys_led_swnode,
 	}, {
 		.name = "basic-mmio-gpio",
 		.of_compatible = "arm,vexpress-sysreg,sys_mci",
 		.num_resources = 1,
 		.resources = &DEFINE_RES_MEM_NAMED(SYS_MCI, 0x4, "dat"),
-		.platform_data = &vexpress_sysreg_sys_mci_pdata,
-		.pdata_size = sizeof(vexpress_sysreg_sys_mci_pdata),
+		.swnode = &vexpress_sysreg_sys_mci_swnode,
 	}, {
 		.name = "basic-mmio-gpio",
 		.of_compatible = "arm,vexpress-sysreg,sys_flash",
 		.num_resources = 1,
 		.resources = &DEFINE_RES_MEM_NAMED(SYS_FLASH, 0x4, "dat"),
-		.platform_data = &vexpress_sysreg_sys_flash_pdata,
-		.pdata_size = sizeof(vexpress_sysreg_sys_flash_pdata),
+		.swnode = &vexpress_sysreg_sys_flash_swnode,
 	}, {
 		.name = "vexpress-syscfg",
 		.num_resources = 1,

-- 
2.48.1