From 34e8609f2c4f589b8cd8d922a8f77abec98c39cb Mon Sep 17 00:00:00 2001
From: Vincent Dupont <vincent@otakeys.com>
Date: Mon, 23 Oct 2017 11:37:01 +0200
Subject: [PATCH] cpu/stm32_common: add pm support in spi driver
---
cpu/stm32_common/periph/spi.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/cpu/stm32_common/periph/spi.c b/cpu/stm32_common/periph/spi.c
index 843ed87439..9cc5fc2a5e 100644
--- a/cpu/stm32_common/periph/spi.c
+++ b/cpu/stm32_common/periph/spi.c
@@ -30,6 +30,7 @@
#include "mutex.h"
#include "assert.h"
#include "periph/spi.h"
+#include "pm_layered.h"
/**
* @brief Number of bits to shift the BR value in the CR1 register
@@ -119,6 +120,10 @@ int spi_acquire(spi_t bus, spi_cs_t cs, spi_mode_t mode, spi_clk_t clk)
{
/* lock bus */
mutex_lock(&locks[bus]);
+#ifdef STM32_PM_STOP
+ /* block STOP mode */
+ pm_block(STM32_PM_STOP);
+#endif
/* enable SPI device clock */
periph_clk_en(spi_config[bus].apbbus, spi_config[bus].rccmask);
/* enable device */
@@ -140,6 +145,10 @@ void spi_release(spi_t bus)
dev(bus)->CR1 = 0;
dev(bus)->CR2 &= ~(SPI_CR2_SSOE);
periph_clk_dis(spi_config[bus].apbbus, spi_config[bus].rccmask);
+#ifdef STM32_PM_STOP
+ /* unblock STOP mode */
+ pm_unblock(STM32_PM_STOP);
+#endif
mutex_unlock(&locks[bus]);
}
--
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