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>

diff --git a/drivers/mfd/ab8500-core.c b/drivers/mfd/ab8500-core.c
index 141572c6c392f4aa7d1a4a779d9bcfa33b07d01b..a4120edbccf293319c9d095adabf15430f6a43e2 100644 (file)
--- 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);