spi: img-spfi: fix multiple calls to request gpio

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spfi_setup may be called many times by the spi framework, but
gpio_request_one can only be called once without freeing, repeatedly
calling gpio_request_one will cause an error to be thrown, which
causes the request to spi_setup to be marked as failed.

We can have a per-spi_device flag that indicates whether or not the
gpio has been requested. If the gpio has already been requested use
gpio_direction_output to set the direction of the gpio.

Fixes: 8c2c8c03cd ("spi: img-spfi: Control CS lines with GPIO")
Signed-off-by: Sifan Naeem <sifan.naeem@imgtec.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org

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Sifan Naeem 2015-07-29 11:55:26 +01:00 • committed by Mark Brown

parent 011710e2ab

commit b03ba9e314

1 changed files with 41 additions and 8 deletions

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drivers/spi/spi-img-spfi.c

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