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SubjectRe: [PATCH v3 5/6] spi: at91-usart: add driver for at91-usart as spi
On Thu, May 24, 2018 at 07:04:11PM +0300, Radu Pirea wrote:

> if (ctlr->cs_gpios){
> spi->cs_gpio = ctlr->cs_gpios[spi->chip_select];
> if(gpio_is_valid(spi->cs_gpio))
> gpio_direction_output(spi->cs_gpio, !(spi->mode & SPI_CS_HIGH));
>
> }

You're expected to request the GPIOs in your driver using one of the
modern request functions like gpio_request_one() (or ideally the GPIO
descriptor APIs now) which combine the direction setting and request
into a single operation.
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