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spi: dw: introduce spi_shutdown_chip()

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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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6
drivers/spi/spi-dw.h
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@@ -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),