This is a note to let you know that I've just added the patch titled
pinctrl: dra: dt-bindings: Fix pull enable/disable
to the 3.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
pinctrl-dra-dt-bindings-fix-pull-enable-disable.patch
and it can be found in the queue-3.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 23d9cec07c589276561c13b180577c0b87930140 Mon Sep 17 00:00:00 2001
From: Nishanth Menon <nm@xxxxxx>
Date: Tue, 22 Jul 2014 10:39:54 -0500
Subject: pinctrl: dra: dt-bindings: Fix pull enable/disable
From: Nishanth Menon <nm@xxxxxx>
commit 23d9cec07c589276561c13b180577c0b87930140 upstream.
The DRA74/72 control module pins have a weak pull up and pull down.
This is configured by bit offset 17. if BIT(17) is 1, a pull up is
selected, else a pull down is selected.
However, this pull resisstor is applied based on BIT(16) -
PULLUDENABLE - if BIT(18) is *0*, then pull as defined in BIT(17) is
applied, else no weak pulls are applied. We defined this in reverse.
Reference: Table 18-5 (Description of the pad configuration register
bits) in Technical Reference Manual Revision (DRA74x revision Q:
SPRUHI2Q Revised June 2014 and DRA72x revision F: SPRUHP2F - Revised
June 2014)
Fixes: 6e58b8f1daaf1a ("ARM: dts: DRA7: Add the dts files for dra7 SoC and dra7-evm board")
Signed-off-by: Nishanth Menon <nm@xxxxxx>
Tested-by: Felipe Balbi <balbi@xxxxxx>
Acked-by: Felipe Balbi <balbi@xxxxxx>
Signed-off-by: Tony Lindgren <tony@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
include/dt-bindings/pinctrl/dra.h | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
--- a/include/dt-bindings/pinctrl/dra.h
+++ b/include/dt-bindings/pinctrl/dra.h
@@ -30,7 +30,8 @@
#define MUX_MODE14 0xe
#define MUX_MODE15 0xf
-#define PULL_ENA (1 << 16)
+#define PULL_ENA (0 << 16)
+#define PULL_DIS (1 << 16)
#define PULL_UP (1 << 17)
#define INPUT_EN (1 << 18)
#define SLEWCONTROL (1 << 19)
@@ -38,10 +39,10 @@
#define WAKEUP_EVENT (1 << 25)
/* Active pin states */
-#define PIN_OUTPUT 0
+#define PIN_OUTPUT (0 | PULL_DIS)
#define PIN_OUTPUT_PULLUP (PIN_OUTPUT | PULL_ENA | PULL_UP)
#define PIN_OUTPUT_PULLDOWN (PIN_OUTPUT | PULL_ENA)
-#define PIN_INPUT INPUT_EN
+#define PIN_INPUT (INPUT_EN | PULL_DIS)
#define PIN_INPUT_SLEW (INPUT_EN | SLEWCONTROL)
#define PIN_INPUT_PULLUP (PULL_ENA | INPUT_EN | PULL_UP)
#define PIN_INPUT_PULLDOWN (PULL_ENA | INPUT_EN)
Patches currently in stable-queue which might be from nm@xxxxxx are
queue-3.15/pinctrl-dra-dt-bindings-fix-pull-enable-disable.patch
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