From ebc6178dab43b38042f0e089526bad49081870e5 Mon Sep 17 00:00:00 2001 From: Rabin Vincent Date: Wed, 28 Sep 2011 15:49:11 +0530 Subject: 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 Reviewed-by: Srinidhi Kasagar Signed-off-by: Linus Walleij --- arch/arm/plat-nomadik/include/plat/gpio-nomadik.h | 1 + arch/arm/plat-nomadik/include/plat/pincfg.h | 6 ++++++ 2 files changed, 7 insertions(+) (limited to 'arch/arm') diff --git a/arch/arm/plat-nomadik/include/plat/gpio-nomadik.h b/arch/arm/plat-nomadik/include/plat/gpio-nomadik.h index 9605bf227df..3e8b7f16fb7 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 22cb97d2d8a..da6b1e35e17 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) -- cgit v1.2.3-70-g09d2