mfd: ab8500-core: Show turn on status at boot

Several states can be detected when a device is initially turned on.
This patch displays these states in the log. If none of the states
are true, then we report that too.

Signed-off-by: Mattias Wallin <mattias.wallin@stericsson.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Reviewed-by: Marcus COOPER <marcus.xm.cooper@stericsson.com>
Reviewed-by: Jonas ABERG <jonas.aberg@stericsson.com>
Acked-by: Samuel Ortiz <sameo@linux.intel.com>

1 files changed, 26 insertions, 0 deletions

diff --git a/drivers/mfd/ab8500-core.c b/drivers/mfd/ab8500-core.c
index 141572c6c392..a4120edbccf2 100644
--- a/drivers/mfd/ab8500-core.c
+++ b/drivers/mfd/ab8500-core.c
@@ -1542,6 +1542,15 @@ static int ab8500_probe(struct platform_device *pdev)
                 "Battery level lower than power on reset threshold",
                 "Power on key 1 pressed longer than 10 seconds",
                 "DB8500 thermal shutdown"};
+        static char *turn_on_status[] = {
+                "Battery rising (Vbat)",
+                "Power On Key 1 dbF",
+                "Power On Key 2 dbF",
+                "RTC Alarm",
+                "Main Charger Detect",
+                "Vbus Detect (USB)",
+                "USB ID Detect",
+                "UART Factory Mode Detect"};
         struct ab8500_platform_data *plat = dev_get_platdata(&pdev->dev);
         const struct platform_device_id *platid = platform_get_device_id(pdev);
         enum ab8500_version version = AB8500_VERSION_UNDEFINED;
@@ -1655,9 +1664,26 @@ static int ab8500_probe(struct platform_device *pdev)
         } else {
                 printk(KERN_CONT " None\n");
         }
+        ret = get_register_interruptible(ab8500, AB8500_SYS_CTRL1_BLOCK,
+                AB8500_TURN_ON_STATUS, &value);
+        if (ret < 0)
+                return ret;
+        dev_info(ab8500->dev, "turn on reason(s) (%#x): ", value);
+
+        if (value) {
+                for (i = 0; i < ARRAY_SIZE(turn_on_status); i++) {
+                        if (value & 1)
+                                printk("\"%s\" ", turn_on_status[i]);
+                        value = value >> 1;
+                }
+                printk("\n");
+        } else {
+                printk("None\n");
+        }
 
         if (plat && plat->init)
                 plat->init(ab8500);
+
         if (is_ab9540(ab8500)) {
                 ret = get_register_interruptible(ab8500, AB8500_CHARGER,
                         AB8500_CH_USBCH_STAT1_REG, &value);