drivers/spi: Get rid of spi_get_config

There is only one user for spi_get_config i.e. SPI ACPI. Also, the
values provided by spi_get_config are constant for now. Thus, get rid
of the spi_get_config call and fill in these constant values in SPI
ACPI code itself. If there is a need in the future to change these,
appropriate device-tree configs can be added.

BUG=b:36873582

Change-Id: Ied38e2670784ee3317bb12e542666c224bd9e819
Signed-off-by: Furquan Shaikh <furquan@chromium.org>
Reviewed-on: https://review.coreboot.org/19203
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: build bot (Jenkins)

2 files changed, 8 insertions, 34 deletions

diff --git a/src/drivers/spi/acpi/acpi.c b/src/drivers/spi/acpi/acpi.c
index 028a37c20d..102780f65d 100644
--- a/src/drivers/spi/acpi/acpi.c
+++ b/src/drivers/spi/acpi/acpi.c
@@ -76,13 +76,15 @@ static void spi_acpi_fill_ssdt_generator(struct device *dev)
 	struct drivers_spi_acpi_config *config = dev->chip_info;
 	const char *scope = acpi_device_scope(dev);
 	const char *path = acpi_device_path(dev);
-	struct spi_cfg spi_cfg;
-	struct spi_slave slave;
-	int bus = -1, cs = dev->path.spi.cs;
 	struct acpi_spi spi = {
-		.device_select = cs,
+		.device_select = dev->path.spi.cs,
 		.speed = config->speed ? : 1 * MHz,
 		.resource = scope,
+		.device_select_polarity = SPI_POLARITY_LOW,
+		.wire_mode = SPI_4_WIRE_MODE,
+		.data_bit_length = 8,
+		.clock_phase = SPI_CLOCK_PHASE_FIRST,
+		.clock_polarity = SPI_POLARITY_LOW,
 	};
 	int curr_index = 0;
 	int irq_gpio_index = -1;
@@ -92,10 +94,9 @@ static void spi_acpi_fill_ssdt_generator(struct device *dev)
 	if (!dev->enabled || !scope)
 		return;
 
-	bus = spi_acpi_get_bus(dev);
-	if (bus == -1) {
+	if (spi_acpi_get_bus(dev) == -1) {
 		printk(BIOS_ERR, "%s: ERROR: Cannot get bus for device.\n",
-		       dev_path(dev));
+			dev_path(dev));
 		return;
 	}
 
@@ -104,23 +105,6 @@ static void spi_acpi_fill_ssdt_generator(struct device *dev)
 		return;
 	}
 
-	if (spi_setup_slave(bus, cs, &slave)) {
-		printk(BIOS_ERR, "%s: ERROR: SPI setup failed.\n",
-			dev_path(dev));
-		return;
-	}
-
-	if (spi_get_config(&slave, &spi_cfg)) {
-		printk(BIOS_ERR, "%s: ERROR: SPI get config failed.\n",
-			dev_path(dev));
-		return;
-	}
-
-	spi.device_select_polarity = spi_cfg.cs_polarity;
-	spi.wire_mode = spi_cfg.wire_mode;
-	spi.data_bit_length = spi_cfg.data_bit_length;
-	spi.clock_phase = spi_cfg.clk_phase;
-
 	/* Device */
 	acpigen_write_scope(scope);
 	acpigen_write_device(acpi_device_name(dev));
diff --git a/src/drivers/spi/spi-generic.c b/src/drivers/spi/spi-generic.c
index 3ef437c4a7..805e17af5a 100644
--- a/src/drivers/spi/spi-generic.c
+++ b/src/drivers/spi/spi-generic.c
@@ -88,16 +88,6 @@ int spi_xfer(const struct spi_slave *slave, const void *dout, size_t bytesout,
 	return -1;
 }
 
-int spi_get_config(const struct spi_slave *slave, struct spi_cfg *cfg)
-{
-	const struct spi_ctrlr *ctrlr = slave->ctrlr;
-
-	if (ctrlr && ctrlr->get_config)
-		return ctrlr->get_config(slave, cfg);
-
-	return -1;
-}
-
 void __attribute__((weak)) spi_init(void)
 {
 	/* Default weak implementation - do nothing. */