From: Keith Packard <keithp@keithp.com>
Date: Tue, 7 Oct 2014 03:32:00 +0000 (+0200)
Subject: altos: Mark STM ao_spi_send as taking const pointer
X-Git-Tag: bdale-altosdroid~6^2~38
X-Git-Url: https://git.gag.com/?p=fw%2Faltos;a=commitdiff_plain;h=484b530a16a54ca8fde412c3f466bfe7eed978cd;ds=sidebyside

altos: Mark STM ao_spi_send as taking const pointer

We don't write to this, so let it be const for type checking

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

diff --git a/src/stm/ao_arch_funcs.h b/src/stm/ao_arch_funcs.h
index 7ad3b4b8..42f1a2e5 100644
--- a/src/stm/ao_arch_funcs.h
+++ b/src/stm/ao_arch_funcs.h
@@ -74,7 +74,7 @@ void
 ao_spi_put(uint8_t spi_index);
 
 void
-ao_spi_send(void *block, uint16_t len, uint8_t spi_index);
+ao_spi_send(const void *block, uint16_t len, uint8_t spi_index);
 
 void
 ao_spi_send_fixed(uint8_t value, uint16_t len, uint8_t spi_index);
diff --git a/src/stm/ao_spi_stm.c b/src/stm/ao_spi_stm.c
index 885af544..7eaa3924 100644
--- a/src/stm/ao_spi_stm.c
+++ b/src/stm/ao_spi_stm.c
@@ -42,7 +42,7 @@ static const struct ao_spi_stm_info ao_spi_stm_info[STM_NUM_SPI] = {
 static uint8_t	spi_dev_null;
 
 void
-ao_spi_send(void *block, uint16_t len, uint8_t spi_index)
+ao_spi_send(const void *block, uint16_t len, uint8_t spi_index)
 {
 	struct stm_spi *stm_spi = ao_spi_stm_info[AO_SPI_INDEX(spi_index)].stm_spi;
 	uint8_t	mosi_dma_index = ao_spi_stm_info[AO_SPI_INDEX(spi_index)].mosi_dma_index;
@@ -51,7 +51,7 @@ ao_spi_send(void *block, uint16_t len, uint8_t spi_index)
 	/* Set up the transmit DMA to deliver data */
 	ao_dma_set_transfer(mosi_dma_index,
 			    &stm_spi->dr,
-			    block,
+			    (void *) block,
 			    len,
 			    (0 << STM_DMA_CCR_MEM2MEM) |
 			    (STM_DMA_CCR_PL_MEDIUM << STM_DMA_CCR_PL) |