Commit 34c11a70 authored Feb 22, 2012 by Paer-Olof Haakansson Committed by Lee Jones Jan 23, 2013

u8500-charger: Delay for USB enumeration



If charging is started before USB enumeration of an Accessory
Charger Adapter has finished, the AB8500 will generate a
VBUS_ERROR. This in turn results in timeouts and delays the
enumeration with around 15 seconds. This patch delays the
charging and then ramps currents slowly to avoid VBUS errors.
The delay allows the enumeration to have finished before
charging is turned on.

Signed-off-by: Martin Sjoblom <martin.w.sjoblom@stericsson.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Reviewed-by: Jonas ABERG <jonas.aberg@stericsson.com>
Tested-by: Jonas ABERG <jonas.aberg@stericsson.com>

parent 97034a1e

drivers/mfd/ab8500-core.c

+6 −0

Original line number	Diff line number	Diff line
		@@ -749,6 +749,12 @@ static struct resource ab8500_charger_resources[] = {
		.end = AB8500_INT_CH_WD_EXP,
		.flags = IORESOURCE_IRQ,
		},
		{
		.name = "VBUS_CH_DROP_END",
		.start = AB8500_INT_VBUS_CH_DROP_END,
		.end = AB8500_INT_VBUS_CH_DROP_END,
		.flags = IORESOURCE_IRQ,
		},
		};

		static struct resource ab8500_btemp_resources[] = {

drivers/power/ab8500_charger.c

+325 −107

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