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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>
This commit is contained in:
Andy Shevchenko 2015-10-14 23:12:23 +03:00 committed by Mark Brown
parent d53c0ef319
commit 1cc3f141f0
2 changed files with 12 additions and 7 deletions
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13
drivers/spi/spi-dw.c
View File

@ -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);

6
drivers/spi/spi-dw.h
View File

@ -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),