spi: Replace all spi->chip_select and spi->cs_gpiod references with function call

Supporting multi-cs in spi drivers would require the chip_select & cs_gpiod
members of struct spi_device to be an array. But changing the type of these
members to array would break the spi driver functionality. To make the
transition smoother introduced four new APIs to get/set the
spi->chip_select & spi->cs_gpiod and replaced all spi->chip_select and
spi->cs_gpiod references with get or set API calls.
While adding multi-cs support in further patches the chip_select & cs_gpiod
members of the spi_device structure would be converted to arrays & the
"idx" parameter of the APIs would be used as array index i.e.,
spi->chip_select[idx] & spi->cs_gpiod[idx] respectively.

Signed-off-by: Amit Kumar Mahapatra <amit.kumar-mahapatra@amd.com>
Acked-by: Heiko Stuebner <heiko@sntech.de> # Rockchip drivers
Reviewed-by: Michal Simek <michal.simek@amd.com>
Reviewed-by: Cédric Le Goater <clg@kaod.org> # Aspeed driver
Reviewed-by: Dhruva Gole <d-gole@ti.com> # SPI Cadence QSPI
Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com> # spi-stm32-qspi
Acked-by: William Zhang <william.zhang@broadcom.com> # bcm63xx-hsspi driver
Reviewed-by: Serge Semin <fancer.lancer@gmail.com> # DW SSI part
Link: https://lore.kernel.org/r/167847070432.26.15076794204368669839@mailman-core.alsa-project.org
Signed-off-by: Mark Brown <broonie@kernel.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/spi/spi-gxp.c b/drivers/spi/spi-gxp.c
index c900c2f39b57..684d63f402f3 100644
--- a/drivers/spi/spi-gxp.c
+++ b/drivers/spi/spi-gxp.c
@@ -201,7 +201,7 @@ static ssize_t gxp_spi_write(struct gxp_spi_chip *chip, const struct spi_mem_op
 static int do_gxp_exec_mem_op(struct spi_mem *mem, const struct spi_mem_op *op)
 {
 	struct gxp_spi *spifi = spi_controller_get_devdata(mem->spi->master);
-	struct gxp_spi_chip *chip = &spifi->chips[mem->spi->chip_select];
+	struct gxp_spi_chip *chip = &spifi->chips[spi_get_chipselect(mem->spi, 0)];
 	int ret;
 
 	if (op->data.dir == SPI_MEM_DATA_IN) {
@@ -237,7 +237,7 @@ static const struct spi_controller_mem_ops gxp_spi_mem_ops = {
 static int gxp_spi_setup(struct spi_device *spi)
 {
 	struct gxp_spi *spifi = spi_controller_get_devdata(spi->master);
-	unsigned int cs = spi->chip_select;
+	unsigned int cs = spi_get_chipselect(spi, 0);
 	struct gxp_spi_chip *chip = &spifi->chips[cs];
 
 	chip->spifi = spifi;