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Date:	Tue, 22 Jul 2014 10:39:54 -0500
From:	Nishanth Menon <>
To:	Tony Lindgren <>
CC:	Rob Herring <>,
	Mark Rutland <>,
	Benoit Cousson <>,
	<>, <>,
	<>, <>,
	Nishanth Menon <>
Subject: [PATCH] pinctrl: dra: dt-bindings: Fix pull enable/disable

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 <>
Patch based on v3.16-rc5 tag

1: dra72x-evm:  Boot ok: (needs MMC filesystem that current dts does not have.
	- Fails in plain Vanilla 3.16-rc5 kernel due to missing patch to handle USB IP instance delta (between dra72x and dra74x) appropriately.
	- Tested with fixes needed: and

2: dra7xx-evm:  Boot PASS:

Equivalent testing on 3.14 based product kernel:
 dra72x-evm:  Boot PASS:
 dra7xx-evm:  Boot PASS:

It is obvious that current users of padconf have'nt had trouble with
the wrong definitions. I think I might have been the first to discover
this as emmc on beagleboard-X15 (an upcoming platform) exposed this problem.

 include/dt-bindings/pinctrl/dra.h |    7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/include/dt-bindings/pinctrl/dra.h b/include/dt-bindings/pinctrl/dra.h
index 002a285..3d33794 100644
--- 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)

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