ARM: pxa: Add dummy backlight power supply on Mitac Mio A701

Recent changes to the pwm-backlight driver have made the power supply
mandatory. There is code in the regulator core to deal with situations
where no regulator is specified and provide a dummy, but that works on
DT-based boards only.

The situation can be remedied by adding a dummy regulator during board
initialization.

Tested-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
Signed-off-by: Haojian Zhuang <haojian.zhuang@gmail.com>

1 files changed, 9 insertions, 0 deletions

diff --git a/arch/arm/mach-pxa/mioa701.c b/arch/arm/mach-pxa/mioa701.c
index f70583fee59f..29997bde277d 100644
--- a/arch/arm/mach-pxa/mioa701.c
+++ b/arch/arm/mach-pxa/mioa701.c
@@ -38,6 +38,7 @@
 #include <linux/mtd/physmap.h>
 #include <linux/usb/gpio_vbus.h>
 #include <linux/reboot.h>
+#include <linux/regulator/fixed.h>
 #include <linux/regulator/max1586.h>
 #include <linux/slab.h>
 #include <linux/i2c/pxa-i2c.h>
@@ -714,6 +715,10 @@ static struct gpio global_gpios[] = {
         { GPIO56_MT9M111_nOE, GPIOF_OUT_INIT_LOW, "Camera nOE" },
 };
 
+static struct regulator_consumer_supply fixed_5v0_consumers[] = {
+        REGULATOR_SUPPLY("power", "pwm-backlight"),
+};
+
 static void __init mioa701_machine_init(void)
 {
         int rc;
@@ -753,6 +758,10 @@ static void __init mioa701_machine_init(void)
         pxa_set_i2c_info(&i2c_pdata);
         pxa27x_set_i2c_power_info(NULL);
         pxa_set_camera_info(&mioa701_pxacamera_platform_data);
+
+        regulator_register_always_on(0, "fixed-5.0V", fixed_5v0_consumers,
+                                     ARRAY_SIZE(fixed_5v0_consumers),
+                                     5000000);
 }
 
 static void mioa701_machine_exit(void)