spi: bcm2835aux: warn in dmesg that native cs is not really supported

	bcm2835aux_spi_reset_hw(bs);

}

static int bcm2835aux_spi_setup(struct spi_device *spi)

{

	int ret;

	/* sanity check for native cs */

	if (spi->mode & SPI_NO_CS)

		return 0;

	if (gpio_is_valid(spi->cs_gpio))

		return 0;

	/* for dt-backwards compatibility: only support native on CS0

	 * known things not supported with broken native CS:

	 * * multiple chip-selects: cs0-cs2 are all

	 *     simultaniously asserted whenever there is a transfer

	 *     this even includes SPI_NO_CS

	 * * SPI_CS_HIGH: cs are always asserted low

	 * * cs_change: cs is deasserted after each spi_transfer

	 * * cs_delay_usec: cs is always deasserted one SCK cycle

	 *     after the last transfer

	 * probably more...

	 */

	dev_warn(&spi->dev,

		 "Native CS is not supported - please configure cs-gpio in device-tree\n");

	if (spi->chip_select == 0)

		return 0;

	dev_warn(&spi->dev, "Native CS is not working for cs > 0\n");

	return -EINVAL;

}

static int bcm2835aux_spi_probe(struct platform_device *pdev)

{

	struct spi_master *master;

	 *     a spi_transfer

	 */

	master->num_chipselect = 1;

	master->setup = bcm2835aux_spi_setup;

	master->transfer_one = bcm2835aux_spi_transfer_one;

	master->handle_err = bcm2835aux_spi_handle_err;

	master->prepare_message = bcm2835aux_spi_prepare_message;