[PATCH 1/4] gpio: sa1100: register software node for GPIO controller

[Dmitry Torokhov <dmitry.torokhov@gmail.com>]

Define and register a static software node (sa1100_gpiochip_node) for the
SA-1100 GPIO controller during sa1100_init_gpio(). Assign its firmware node
directly to the GPIO chip prior to calling gpiochip_add_data().

This allows StrongARM SA-1100 board setup files to reference the SoC GPIO
controller in property entries when converting legacy platform data to
software nodes, resolving pin bindings directly via the attached firmware
node without relying on name matching.

Assisted-by: Antigravity:gemini-3.5-flash
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---
 arch/arm/mach-sa1100/generic.h |  3 +++
 drivers/gpio/gpio-sa1100.c     | 10 +++++++++-
 2 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/arch/arm/mach-sa1100/generic.h b/arch/arm/mach-sa1100/generic.h
index 5fe0d4fc0f8c..3cfe3b647711 100644
--- a/arch/arm/mach-sa1100/generic.h
+++ b/arch/arm/mach-sa1100/generic.h
@@ -48,6 +48,9 @@ int sa11xx_clk_init(void);
 struct gpiod_lookup_table;
 void sa11x0_register_pcmcia(int socket, struct gpiod_lookup_table *);
 
+struct software_node;
+extern const struct software_node sa1100_gpiochip_node;
+
 struct fixed_voltage_config;
 struct regulator_consumer_supply;
 int sa11x0_register_fixed_regulator(int n, struct fixed_voltage_config *cfg,
diff --git a/drivers/gpio/gpio-sa1100.c b/drivers/gpio/gpio-sa1100.c
index 1938ffa2f4f3..ffa73dd3b982 100644
--- a/drivers/gpio/gpio-sa1100.c
+++ b/drivers/gpio/gpio-sa1100.c
@@ -13,6 +13,11 @@
 #include <mach/hardware.h>
 #include <mach/irqs.h>
 #include <mach/generic.h>
+#include <linux/property.h>
+
+const struct software_node sa1100_gpiochip_node = {
+	.name = "sa1100-gpio",
+};
 
 struct sa1100_gpio_chip {
 	struct gpio_chip chip;
@@ -317,6 +322,7 @@ static const int sa1100_gpio_irqs[] __initconst = {
 void __init sa1100_init_gpio(void)
 {
 	struct sa1100_gpio_chip *sgc = &sa1100_gpio_chip;
+	struct gpio_chip *gc = &sgc->chip;
 	int i;
 
 	/* clear all GPIO edge detects */
@@ -324,7 +330,9 @@ void __init sa1100_init_gpio(void)
 	writel_relaxed(0, sgc->membase + R_GRER);
 	writel_relaxed(-1, sgc->membase + R_GEDR);
 
-	gpiochip_add_data(&sa1100_gpio_chip.chip, NULL);
+	software_node_register(&sa1100_gpiochip_node);
+	gc->fwnode = software_node_fwnode(&sa1100_gpiochip_node);
+	gpiochip_add_data(gc, NULL);
 
 	sa1100_gpio_irqdomain = irq_domain_create_simple(NULL,
 			28, IRQ_GPIO0,

-- 
2.55.0.rc2.803.g1fd1e6609c-goog