From 17a5101b4078be0e7350500ff406f9e86f61aaa2 Mon Sep 17 00:00:00 2001
From: Marian Buschsieweke <marian.buschsieweke@ovgu.de>
Date: Sat, 19 May 2018 18:12:25 +0200
Subject: [PATCH] cpu/lpc2387: Fixed broken SPI driver
In commit 513b20ffd328934c58af169e2bce0c0a01eddee2 the SPI API was changed to
power up an configure the SPI bus on spi_acquire(). Sadly, the lpc2387 SPI
apparently needs to be reconfigured after each power up. This commit moves
the initialization code required after each power up from spi_init() to
spi_acquire().
---
cpu/lpc2387/periph/spi.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/cpu/lpc2387/periph/spi.c b/cpu/lpc2387/periph/spi.c
index 4ef7c4a111..3fe63bd95d 100644
--- a/cpu/lpc2387/periph/spi.c
+++ b/cpu/lpc2387/periph/spi.c
@@ -47,8 +47,6 @@ void spi_init(spi_t bus)
{
assert(bus == SPI_DEV(0));
- /* interface setup */
- SSP0CR0 = 7;
/* configure pins */
spi_init_pins(bus);
/* power off the bus (default is on) */
@@ -81,6 +79,8 @@ int spi_acquire(spi_t bus, spi_cs_t cs, spi_mode_t mode, spi_clk_t clk)
mutex_lock(&lock);
/* power on */
PCONP |= (PCSSP0);
+ /* interface setup */
+ SSP0CR0 = 7;
/* configure bus clock */
lpc2387_pclk_scale(CLOCK_CORECLOCK / 1000, (uint32_t)clk, &pclksel, &cpsr);
--
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