From: Keith Packard <keithp@keithp.com>
Date: Fri, 23 Mar 2012 07:03:29 +0000 (-0700)
Subject: Automatically set ALTERNATE pin mode when setting alternate function
X-Git-Tag: 1.0.9.4~13
X-Git-Url: https://git.gag.com/?p=fw%2Faltos;a=commitdiff_plain;h=6337b5f522be11926a6490d7bb27a4f7795da569

Automatically set ALTERNATE pin mode when setting alternate function

When selecting an alternate function, set the pin to alternate mode as
well; there's no sense requiring two separate calls everywhere.

Signed-off-by: Keith Packard <keithp@keithp.com>
---

diff --git a/src/stm/stm32l.h b/src/stm/stm32l.h
index 50e5cc34..531a4fb9 100644
--- a/src/stm/stm32l.h
+++ b/src/stm/stm32l.h
@@ -133,6 +133,10 @@ stm_pupdr_get(struct stm_gpio *gpio, int pin) {
 
 static inline void
 stm_afr_set(struct stm_gpio *gpio, int pin, uint32_t value) {
+	/*
+	 * Set alternate pin mode too
+	 */
+	stm_moder_set(gpio, pin, STM_MODER_ALTERNATE);
 	if (pin < 8)
 		gpio->afrl = ((gpio->afrl &
 			       ~(STM_AFR_MASK << STM_AFR_SHIFT(pin))) |