v4.19.13 snapshot.
diff --git a/arch/arm/plat-omap/debug-leds.c b/arch/arm/plat-omap/debug-leds.c
new file mode 100644
index 0000000..48b69de
--- /dev/null
+++ b/arch/arm/plat-omap/debug-leds.c
@@ -0,0 +1,174 @@
+/*
+ * linux/arch/arm/plat-omap/debug-leds.c
+ *
+ * Copyright 2011 by Bryan Wu <bryan.wu@canonical.com>
+ * Copyright 2003 by Texas Instruments Incorporated
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/leds.h>
+#include <linux/io.h>
+#include <linux/platform_data/gpio-omap.h>
+#include <linux/slab.h>
+
+#include <asm/mach-types.h>
+
+/* Many OMAP development platforms reuse the same "debug board"; these
+ * platforms include H2, H3, H4, and Perseus2. There are 16 LEDs on the
+ * debug board (all green), accessed through FPGA registers.
+ */
+
+/* NOTE: most boards don't have a static mapping for the FPGA ... */
+struct h2p2_dbg_fpga {
+ /* offset 0x00 */
+ u16 smc91x[8];
+ /* offset 0x10 */
+ u16 fpga_rev;
+ u16 board_rev;
+ u16 gpio_outputs;
+ u16 leds;
+ /* offset 0x18 */
+ u16 misc_inputs;
+ u16 lan_status;
+ u16 lan_reset;
+ u16 reserved0;
+ /* offset 0x20 */
+ u16 ps2_data;
+ u16 ps2_ctrl;
+ /* plus also 4 rs232 ports ... */
+};
+
+static struct h2p2_dbg_fpga __iomem *fpga;
+
+static u16 fpga_led_state;
+
+struct dbg_led {
+ struct led_classdev cdev;
+ u16 mask;
+};
+
+static const struct {
+ const char *name;
+ const char *trigger;
+} dbg_leds[] = {
+ { "dbg:d4", "heartbeat", },
+ { "dbg:d5", "cpu0", },
+ { "dbg:d6", "default-on", },
+ { "dbg:d7", },
+ { "dbg:d8", },
+ { "dbg:d9", },
+ { "dbg:d10", },
+ { "dbg:d11", },
+ { "dbg:d12", },
+ { "dbg:d13", },
+ { "dbg:d14", },
+ { "dbg:d15", },
+ { "dbg:d16", },
+ { "dbg:d17", },
+ { "dbg:d18", },
+ { "dbg:d19", },
+};
+
+/*
+ * The triggers lines up below will only be used if the
+ * LED triggers are compiled in.
+ */
+static void dbg_led_set(struct led_classdev *cdev,
+ enum led_brightness b)
+{
+ struct dbg_led *led = container_of(cdev, struct dbg_led, cdev);
+ u16 reg;
+
+ reg = readw_relaxed(&fpga->leds);
+ if (b != LED_OFF)
+ reg |= led->mask;
+ else
+ reg &= ~led->mask;
+ writew_relaxed(reg, &fpga->leds);
+}
+
+static enum led_brightness dbg_led_get(struct led_classdev *cdev)
+{
+ struct dbg_led *led = container_of(cdev, struct dbg_led, cdev);
+ u16 reg;
+
+ reg = readw_relaxed(&fpga->leds);
+ return (reg & led->mask) ? LED_FULL : LED_OFF;
+}
+
+static int fpga_probe(struct platform_device *pdev)
+{
+ struct resource *iomem;
+ int i;
+
+ iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!iomem)
+ return -ENODEV;
+
+ fpga = ioremap(iomem->start, resource_size(iomem));
+ writew_relaxed(0xff, &fpga->leds);
+
+ for (i = 0; i < ARRAY_SIZE(dbg_leds); i++) {
+ struct dbg_led *led;
+
+ led = kzalloc(sizeof(*led), GFP_KERNEL);
+ if (!led)
+ break;
+
+ led->cdev.name = dbg_leds[i].name;
+ led->cdev.brightness_set = dbg_led_set;
+ led->cdev.brightness_get = dbg_led_get;
+ led->cdev.default_trigger = dbg_leds[i].trigger;
+ led->mask = BIT(i);
+
+ if (led_classdev_register(NULL, &led->cdev) < 0) {
+ kfree(led);
+ break;
+ }
+ }
+
+ return 0;
+}
+
+static int fpga_suspend_noirq(struct device *dev)
+{
+ fpga_led_state = readw_relaxed(&fpga->leds);
+ writew_relaxed(0xff, &fpga->leds);
+
+ return 0;
+}
+
+static int fpga_resume_noirq(struct device *dev)
+{
+ writew_relaxed(~fpga_led_state, &fpga->leds);
+ return 0;
+}
+
+static const struct dev_pm_ops fpga_dev_pm_ops = {
+ .suspend_noirq = fpga_suspend_noirq,
+ .resume_noirq = fpga_resume_noirq,
+};
+
+static struct platform_driver led_driver = {
+ .driver.name = "omap_dbg_led",
+ .driver.pm = &fpga_dev_pm_ops,
+ .probe = fpga_probe,
+};
+
+static int __init fpga_init(void)
+{
+ if (machine_is_omap_h4()
+ || machine_is_omap_h3()
+ || machine_is_omap_h2()
+ || machine_is_omap_perseus2()
+ )
+ return platform_driver_register(&led_driver);
+ return 0;
+}
+fs_initcall(fpga_init);