Adding upstream version 4.19.249.upstream/4.19.249

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 71 insertions, 0 deletions

diff --git a/arch/arm/mach-ebsa110/leds.c b/arch/arm/mach-ebsa110/leds.c
new file mode 100644
index 000000000..0398258c2
--- /dev/null
+++ b/arch/arm/mach-ebsa110/leds.c
@@ -0,0 +1,71 @@
+/*
+ * Driver for the LED found on the EBSA110 machine
+ * Based on Versatile and RealView machine LED code
+ *
+ * License terms: GNU General Public License (GPL) version 2
+ * Author: Bryan Wu <bryan.wu@canonical.com>
+ */
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/slab.h>
+#include <linux/leds.h>
+
+#include <asm/mach-types.h>
+
+#include "core.h"
+
+#if defined(CONFIG_NEW_LEDS) && defined(CONFIG_LEDS_CLASS)
+static void ebsa110_led_set(struct led_classdev *cdev,
+			      enum led_brightness b)
+{
+	u8 reg = __raw_readb(SOFT_BASE);
+
+	if (b != LED_OFF)
+		reg |= 0x80;
+	else
+		reg &= ~0x80;
+
+	__raw_writeb(reg, SOFT_BASE);
+}
+
+static enum led_brightness ebsa110_led_get(struct led_classdev *cdev)
+{
+	u8 reg = __raw_readb(SOFT_BASE);
+
+	return (reg & 0x80) ? LED_FULL : LED_OFF;
+}
+
+static int __init ebsa110_leds_init(void)
+{
+
+	struct led_classdev *cdev;
+	int ret;
+
+	if (!machine_is_ebsa110())
+		return -ENODEV;
+
+	cdev = kzalloc(sizeof(*cdev), GFP_KERNEL);
+	if (!cdev)
+		return -ENOMEM;
+
+	cdev->name = "ebsa110:0";
+	cdev->brightness_set = ebsa110_led_set;
+	cdev->brightness_get = ebsa110_led_get;
+	cdev->default_trigger = "heartbeat";
+
+	ret = led_classdev_register(NULL, cdev);
+	if (ret	< 0) {
+		kfree(cdev);
+		return ret;
+	}
+
+	return 0;
+}
+
+/*
+ * Since we may have triggers on any subsystem, defer registration
+ * until after subsystem_init.
+ */
+fs_initcall(ebsa110_leds_init);
+#endif