From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sun, 7 Apr 2024 20:49:45 +0200
Subject: Adding upstream version 6.1.76.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 arch/arm/mach-footbridge/ebsa285.c | 124 +++++++++++++++++++++++++++++++++++++
 1 file changed, 124 insertions(+)
 create mode 100644 arch/arm/mach-footbridge/ebsa285.c

(limited to 'arch/arm/mach-footbridge/ebsa285.c')

diff --git a/arch/arm/mach-footbridge/ebsa285.c b/arch/arm/mach-footbridge/ebsa285.c
new file mode 100644
index 000000000..21cf9a358
--- /dev/null
+++ b/arch/arm/mach-footbridge/ebsa285.c
@@ -0,0 +1,124 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * linux/arch/arm/mach-footbridge/ebsa285.c
+ *
+ * EBSA285 machine fixup
+ */
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/spinlock.h>
+#include <linux/slab.h>
+#include <linux/leds.h>
+
+#include <asm/hardware/dec21285.h>
+#include <asm/mach-types.h>
+
+#include <asm/mach/arch.h>
+
+#include "common.h"
+
+/* LEDs */
+#if defined(CONFIG_NEW_LEDS) && defined(CONFIG_LEDS_CLASS)
+#define XBUS_AMBER_L	BIT(0)
+#define XBUS_GREEN_L	BIT(1)
+#define XBUS_RED_L	BIT(2)
+#define XBUS_TOGGLE	BIT(7)
+
+struct ebsa285_led {
+	struct led_classdev     cdev;
+	u8                      mask;
+};
+
+/*
+ * The triggers lines up below will only be used if the
+ * LED triggers are compiled in.
+ */
+static const struct {
+	const char *name;
+	const char *trigger;
+} ebsa285_leds[] = {
+	{ "ebsa285:amber", "cpu0", },
+	{ "ebsa285:green", "heartbeat", },
+	{ "ebsa285:red",},
+};
+
+static unsigned char hw_led_state;
+static void __iomem *xbus;
+
+static void ebsa285_led_set(struct led_classdev *cdev,
+		enum led_brightness b)
+{
+	struct ebsa285_led *led = container_of(cdev,
+			struct ebsa285_led, cdev);
+
+	if (b == LED_OFF)
+		hw_led_state |= led->mask;
+	else
+		hw_led_state &= ~led->mask;
+	writeb(hw_led_state, xbus);
+}
+
+static enum led_brightness ebsa285_led_get(struct led_classdev *cdev)
+{
+	struct ebsa285_led *led = container_of(cdev,
+			struct ebsa285_led, cdev);
+
+	return hw_led_state & led->mask ? LED_OFF : LED_FULL;
+}
+
+static int __init ebsa285_leds_init(void)
+{
+	int i;
+
+	if (!machine_is_ebsa285())
+		return -ENODEV;
+
+	xbus = ioremap(XBUS_CS2, SZ_4K);
+	if (!xbus)
+		return -ENOMEM;
+
+	/* 3 LEDS all off */
+	hw_led_state = XBUS_AMBER_L | XBUS_GREEN_L | XBUS_RED_L;
+	writeb(hw_led_state, xbus);
+
+	for (i = 0; i < ARRAY_SIZE(ebsa285_leds); i++) {
+		struct ebsa285_led *led;
+
+		led = kzalloc(sizeof(*led), GFP_KERNEL);
+		if (!led)
+			break;
+
+		led->cdev.name = ebsa285_leds[i].name;
+		led->cdev.brightness_set = ebsa285_led_set;
+		led->cdev.brightness_get = ebsa285_led_get;
+		led->cdev.default_trigger = ebsa285_leds[i].trigger;
+		led->mask = BIT(i);
+
+		if (led_classdev_register(NULL, &led->cdev) < 0) {
+			kfree(led);
+			break;
+		}
+	}
+
+	return 0;
+}
+
+/*
+ * Since we may have triggers on any subsystem, defer registration
+ * until after subsystem_init.
+ */
+fs_initcall(ebsa285_leds_init);
+#endif
+
+MACHINE_START(EBSA285, "EBSA285")
+	/* Maintainer: Russell King */
+	.atag_offset	= 0x100,
+	.video_start	= 0x000a0000,
+	.video_end	= 0x000bffff,
+	.map_io		= footbridge_map_io,
+	.init_early	= footbridge_sched_clock,
+	.init_irq	= footbridge_init_irq,
+	.init_time	= footbridge_timer_init,
+	.restart	= footbridge_restart,
+MACHINE_END
+
-- 
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