From d7efe5cdda9286d8ffd4cbc6165f83dee5e9b898 Mon Sep 17 00:00:00 2001
From: Aaron Durbin <adurbin@chromium.org>
Date: Thu, 16 May 2013 08:14:25 -0700
Subject: [PATCH] lm4: break out board-specific fan/tach pin config

The current lm4 pwm module was using board-specific
pins during this configuration. Move the implementation
of configure_fan_gpios() to the board-specific files
so that the pin configuration policy isn't a part of the
common infrastructure.

BUG=chrome-os-partner:19504
BRANCH=none
TEST=successfully booted slippy with backlight turning on in OS.

Change-Id: I325f1ac4639b4a78d8b860df7a8b688ca385b71b
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/51471
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
---
 board/link/board.c   |  9 +++++++++
 board/slippy/board.c |  9 +++++++++
 chip/lm4/pwm_fan.c   | 10 ----------
 include/pwm.h        |  5 +++++
 4 files changed, 23 insertions(+), 10 deletions(-)

diff --git a/board/link/board.c b/board/link/board.c
index 28ff9b3a14..e5eca5a79a 100644
--- a/board/link/board.c
+++ b/board/link/board.c
@@ -193,3 +193,12 @@ struct keyboard_scan_config keyscan_config = {
 		0xa4, 0xff, 0xf6, 0x55, 0xfa, 0xc8  /* full set */
 	},
 };
+
+/**
+ * Configure the GPIOs for the pwm module.
+ */
+void configure_fan_gpios(void)
+{
+	/* PM6:7 alternate function 1 = channel 0 PWM/tach */
+	gpio_set_alternate_function(LM4_GPIO_M, 0xc0, 1);
+}
diff --git a/board/slippy/board.c b/board/slippy/board.c
index 5d8016423f..5fe222ff33 100644
--- a/board/slippy/board.c
+++ b/board/slippy/board.c
@@ -157,3 +157,12 @@ struct keyboard_scan_config keyscan_config = {
 		0xa4, 0xff, 0xf6, 0x55, 0xfa, 0xc8  /* full set */
 	},
 };
+
+/**
+ * Configure the GPIOs for the pwm module.
+ */
+void configure_fan_gpios(void)
+{
+	/* PN2:3 alternate function 1 = channel 0 PWM/tach */
+	gpio_set_alternate_function(LM4_GPIO_N, 0x0c, 1);
+}
diff --git a/chip/lm4/pwm_fan.c b/chip/lm4/pwm_fan.c
index a19e42cca2..525b9daca2 100644
--- a/chip/lm4/pwm_fan.c
+++ b/chip/lm4/pwm_fan.c
@@ -42,16 +42,6 @@ struct pwm_fan_state {
 	char pad; /* Pad to multiple of 4 bytes. */
 };
 
-/**
- * Configure the GPIOs for the pwm module.
- */
-static void configure_fan_gpios(void)
-{
-	/* HEY: this is Link only. Slippy is PM2:3 */
-	/* PM6:7 alternate function 1 = channel 0 PWM/tach */
-	gpio_set_alternate_function(LM4_GPIO_M, 0xc0, 1);
-}
-
 void pwm_enable_fan(int enable)
 {
 	if (enable)
diff --git a/include/pwm.h b/include/pwm.h
index bb6b5a8549..9c97ea2fda 100644
--- a/include/pwm.h
+++ b/include/pwm.h
@@ -67,4 +67,9 @@ int pwm_get_keyboard_backlight(void);
  */
 void pwm_set_keyboard_backlight(int percent);
 
+/**
+ * Configure the GPIOs for the pwm module -- board-specific.
+ */
+void configure_fan_gpios(void);
+
 #endif  /* __CROS_EC_PWM_H */