spi: dw: introduce spi_shutdown_chip()

This helper disables SPI controller and sets clock to 0.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

2 files changed, 12 insertions, 7 deletions

diff --git a/drivers/spi/spi-dw.c b/drivers/spi/spi-dw.c
index c8e7715097e7..a730c353d3bf 100644
--- a/drivers/spi/spi-dw.c
+++ b/drivers/spi/spi-dw.c
@@ -546,22 +546,21 @@ void dw_spi_remove_host(struct dw_spi *dws)
 
         if (dws->dma_ops && dws->dma_ops->dma_exit)
                 dws->dma_ops->dma_exit(dws);
-        spi_enable_chip(dws, 0);
-        /* Disable clk */
-        spi_set_clk(dws, 0);
+
+        spi_shutdown_chip(dws);
 }
 EXPORT_SYMBOL_GPL(dw_spi_remove_host);
 
 int dw_spi_suspend_host(struct dw_spi *dws)
 {
-        int ret = 0;
+        int ret;
 
         ret = spi_master_suspend(dws->master);
         if (ret)
                 return ret;
-        spi_enable_chip(dws, 0);
-        spi_set_clk(dws, 0);
-        return ret;
+
+        spi_shutdown_chip(dws);
+        return 0;
 }
 EXPORT_SYMBOL_GPL(dw_spi_suspend_host);
 
diff --git a/drivers/spi/spi-dw.h b/drivers/spi/spi-dw.h
index b75ed327d5a2..35589a270468 100644
--- a/drivers/spi/spi-dw.h
+++ b/drivers/spi/spi-dw.h
@@ -225,6 +225,12 @@ static inline void spi_reset_chip(struct dw_spi *dws)
         spi_enable_chip(dws, 1);
 }
 
+static inline void spi_shutdown_chip(struct dw_spi *dws)
+{
+        spi_enable_chip(dws, 0);
+        spi_set_clk(dws, 0);
+}
+
 /*
  * Each SPI slave device to work with dw_api controller should
  * has such a structure claiming its working mode (poll or PIO/DMA),