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authorRabin Vincent <rabin.vincent@stericsson.com>2011-09-28 15:49:11 +0530
committerLinus Walleij <linus.walleij@linaro.org>2012-04-23 11:06:08 +0200
commitebc6178dab43b38042f0e089526bad49081870e5 (patch)
tree394a03b4d884ec7805424a7d12be0672b07ebe30 /arch/arm/plat-nomadik
parent6c42ad1cf4d7f22469eaecb2eee3b6442169d732 (diff)
downloadop-kernel-dev-ebc6178dab43b38042f0e089526bad49081870e5.zip
op-kernel-dev-ebc6178dab43b38042f0e089526bad49081870e5.tar.gz
gpio/nomadik: support low EMI mode
Low EMI (Electro-Magnetic Interference) mode means lower slew rate on the signals. The Nomadik GPIO controller supports this so create an interface to enable it. Signed-off-by: Rabin Vincent <rabin.vincent@stericsson.com> Reviewed-by: Srinidhi Kasagar <srinidhi.kasagar@stericsson.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'arch/arm/plat-nomadik')
-rw-r--r--arch/arm/plat-nomadik/include/plat/gpio-nomadik.h1
-rw-r--r--arch/arm/plat-nomadik/include/plat/pincfg.h6
2 files changed, 7 insertions, 0 deletions
diff --git a/arch/arm/plat-nomadik/include/plat/gpio-nomadik.h b/arch/arm/plat-nomadik/include/plat/gpio-nomadik.h
index 9605bf2..3e8b7f1 100644
--- a/arch/arm/plat-nomadik/include/plat/gpio-nomadik.h
+++ b/arch/arm/plat-nomadik/include/plat/gpio-nomadik.h
@@ -29,6 +29,7 @@
#define NMK_GPIO_SLPC 0x1c
#define NMK_GPIO_AFSLA 0x20
#define NMK_GPIO_AFSLB 0x24
+#define NMK_GPIO_LOWEMI 0x28
#define NMK_GPIO_RIMSC 0x40
#define NMK_GPIO_FIMSC 0x44
diff --git a/arch/arm/plat-nomadik/include/plat/pincfg.h b/arch/arm/plat-nomadik/include/plat/pincfg.h
index 22cb97d..da6b1e3 100644
--- a/arch/arm/plat-nomadik/include/plat/pincfg.h
+++ b/arch/arm/plat-nomadik/include/plat/pincfg.h
@@ -105,6 +105,12 @@ typedef unsigned long pin_cfg_t;
#define PIN_SLPM_VAL_LOW ((1 + 0) << PIN_SLPM_VAL_SHIFT)
#define PIN_SLPM_VAL_HIGH ((1 + 1) << PIN_SLPM_VAL_SHIFT)
+#define PIN_LOWEMI_SHIFT 25
+#define PIN_LOWEMI_MASK (0x1 << PIN_LOWEMI_SHIFT)
+#define PIN_LOWEMI(x) (((x) & PIN_LOWEMI_MASK) >> PIN_LOWEMI_SHIFT)
+#define PIN_LOWEMI_DISABLED (0 << PIN_LOWEMI_SHIFT)
+#define PIN_LOWEMI_ENABLED (1 << PIN_LOWEMI_SHIFT)
+
/* Shortcuts. Use these instead of separate DIR, PULL, and VAL. */
#define PIN_INPUT_PULLDOWN (PIN_DIR_INPUT | PIN_PULL_DOWN)
#define PIN_INPUT_PULLUP (PIN_DIR_INPUT | PIN_PULL_UP)
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