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, 7 insertions, 6 deletions

diff --git a/drivers/spi/spi-aspeed-smc.c b/drivers/spi/spi-aspeed-smc.c
index 3f2548860317..e75b0d51f06a 100644
--- a/drivers/spi/spi-aspeed-smc.c
+++ b/drivers/spi/spi-aspeed-smc.c
@@ -296,7 +296,7 @@ static const struct aspeed_spi_data ast2400_spi_data;
 static int do_aspeed_spi_exec_op(struct spi_mem *mem, const struct spi_mem_op *op)
 {
 	struct aspeed_spi *aspi = spi_controller_get_devdata(mem->spi->master);
-	struct aspeed_spi_chip *chip = &aspi->chips[mem->spi->chip_select];
+	struct aspeed_spi_chip *chip = &aspi->chips[spi_get_chipselect(mem->spi, 0)];
 	u32 addr_mode, addr_mode_backup;
 	u32 ctl_val;
 	int ret = 0;
@@ -377,7 +377,8 @@ static const char *aspeed_spi_get_name(struct spi_mem *mem)
 	struct aspeed_spi *aspi = spi_controller_get_devdata(mem->spi->master);
 	struct device *dev = aspi->dev;
 
-	return devm_kasprintf(dev, GFP_KERNEL, "%s.%d", dev_name(dev), mem->spi->chip_select);
+	return devm_kasprintf(dev, GFP_KERNEL, "%s.%d", dev_name(dev),
+			      spi_get_chipselect(mem->spi, 0));
 }
 
 struct aspeed_spi_window {
@@ -553,7 +554,7 @@ static int aspeed_spi_do_calibration(struct aspeed_spi_chip *chip);
 static int aspeed_spi_dirmap_create(struct spi_mem_dirmap_desc *desc)
 {
 	struct aspeed_spi *aspi = spi_controller_get_devdata(desc->mem->spi->master);
-	struct aspeed_spi_chip *chip = &aspi->chips[desc->mem->spi->chip_select];
+	struct aspeed_spi_chip *chip = &aspi->chips[spi_get_chipselect(desc->mem->spi, 0)];
 	struct spi_mem_op *op = &desc->info.op_tmpl;
 	u32 ctl_val;
 	int ret = 0;
@@ -620,7 +621,7 @@ static ssize_t aspeed_spi_dirmap_read(struct spi_mem_dirmap_desc *desc,
 				      u64 offset, size_t len, void *buf)
 {
 	struct aspeed_spi *aspi = spi_controller_get_devdata(desc->mem->spi->master);
-	struct aspeed_spi_chip *chip = &aspi->chips[desc->mem->spi->chip_select];
+	struct aspeed_spi_chip *chip = &aspi->chips[spi_get_chipselect(desc->mem->spi, 0)];
 
 	/* Switch to USER command mode if mapping window is too small */
 	if (chip->ahb_window_size < offset + len) {
@@ -670,7 +671,7 @@ static int aspeed_spi_setup(struct spi_device *spi)
 {
 	struct aspeed_spi *aspi = spi_controller_get_devdata(spi->master);
 	const struct aspeed_spi_data *data = aspi->data;
-	unsigned int cs = spi->chip_select;
+	unsigned int cs = spi_get_chipselect(spi, 0);
 	struct aspeed_spi_chip *chip = &aspi->chips[cs];
 
 	chip->aspi = aspi;
@@ -697,7 +698,7 @@ static int aspeed_spi_setup(struct spi_device *spi)
 static void aspeed_spi_cleanup(struct spi_device *spi)
 {
 	struct aspeed_spi *aspi = spi_controller_get_devdata(spi->master);
-	unsigned int cs = spi->chip_select;
+	unsigned int cs = spi_get_chipselect(spi, 0);
 
 	aspeed_spi_chip_enable(aspi, cs, false);