linux-kernel - [PATCH V3 5/9] spi: export spi core function spi_set

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Date:   Mon, 15 Apr 2019 14:30:30 -0700
From:   Sowjanya Komatineni <skomatineni@...dia.com>
To:     <thierry.reding@...il.com>, <jonathanh@...dia.com>,
        <talho@...dia.com>, <skomatineni@...dia.com>, <broonie@...nel.org>,
        <robh+dt@...nel.org>, <mark.rutland@....com>,
        <kyarlagadda@...dia.com>
CC:     <ldewangan@...dia.com>, <linux-tegra@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <linux-spi@...r.kernel.org>,
        <devicetree@...r.kernel.org>
Subject: [PATCH V3 5/9] spi: export spi core function spi_set_cs

This patch exports spi_set_cs of the spi core to allow SPI masters
to use when gpio based chip select is needed.

Signed-off-by: Sowjanya Komatineni <skomatineni@...dia.com>
---
 drivers/spi/spi.c       | 3 ++-
 include/linux/spi/spi.h | 1 +
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
index 59b1e57cae74..fa70e595f17a 100644
--- a/drivers/spi/spi.c
+++ b/drivers/spi/spi.c
@@ -773,7 +773,7 @@ int spi_register_board_info(struct spi_board_info const *info, unsigned n)
 
 /*-------------------------------------------------------------------------*/
 
-static void spi_set_cs(struct spi_device *spi, bool enable)
+void spi_set_cs(struct spi_device *spi, bool enable)
 {
 	if (spi->mode & SPI_CS_HIGH)
 		enable = !enable;
@@ -801,6 +801,7 @@ static void spi_set_cs(struct spi_device *spi, bool enable)
 		spi->controller->set_cs(spi, !enable);
 	}
 }
+EXPORT_SYMBOL_GPL(spi_set_cs);
 
 #ifdef CONFIG_HAS_DMA
 int spi_map_buf(struct spi_controller *ctlr, struct device *dev,
diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h
index fc4d21b4c2e4..c7ca95f26725 100644
--- a/include/linux/spi/spi.h
+++ b/include/linux/spi/spi.h
@@ -973,6 +973,7 @@ extern int spi_async(struct spi_device *spi, struct spi_message *message);
 extern int spi_async_locked(struct spi_device *spi,
 			    struct spi_message *message);
 extern int spi_slave_abort(struct spi_device *spi);
+extern void spi_set_cs(struct spi_device *spi, bool enable);
 
 static inline size_t
 spi_max_message_size(struct spi_device *spi)
-- 
2.7.4