[6/7] ARM: dts: dra7-evm: Fix spurious card insert/removal interrupt
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Message ID 1438244020-4244-7-git-send-email-kishon@ti.com
State New
Headers show

Commit Message

Kishon Vijay Abraham I July 30, 2015, 8:13 a.m. UTC
ldo1_reg in addition to being connected to the io lines is also
connected to the card detect line. On card removal, omap_hsmmc
driver does a regulator_disable causing card detect line to be
pulled down. This raises a card insertion interrupt and once the
MMC core detects there is no card inserted, it does a
regulator disable which again raises a card insertion interrupt.
This happens in a loop causing infinite MMC interrupts.

Fix it by making ldo1_reg as always_on.

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
---
 arch/arm/boot/dts/dra7-evm.dts |    1 +
 1 file changed, 1 insertion(+)

Patch
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diff --git a/arch/arm/boot/dts/dra7-evm.dts b/arch/arm/boot/dts/dra7-evm.dts
index 25f0a00..a6c82e5 100644
--- a/arch/arm/boot/dts/dra7-evm.dts
+++ b/arch/arm/boot/dts/dra7-evm.dts
@@ -358,6 +358,7 @@ 
 					regulator-name = "ldo1";
 					regulator-min-microvolt = <1800000>;
 					regulator-max-microvolt = <3300000>;
+					regulator-always-on;
 					regulator-boot-on;
 				};