staging: greybus: spi: remove KERNEL_VERSION checks

No need to support older kernel versions in the Greybus SPI and spilib
driver, so remove the checks as needed, we can now rely on all of the
correct SPI core apis being present.
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

drivers/staging/greybus/fw-core.c

@@ -20,26 +20,7 @@ struct gb_fw_core {
 	struct gb_connection	*cap_connection;
 };
 
-#ifndef SPI_CORE_SUPPORT_PM
-static int fw_spi_prepare_transfer_hardware(struct device *dev)
-{
-	return gb_pm_runtime_get_sync(to_gb_bundle(dev));
-}
-
-static void fw_spi_unprepare_transfer_hardware(struct device *dev)
-{
-	gb_pm_runtime_put_autosuspend(to_gb_bundle(dev));
-}
-
-static struct spilib_ops __spilib_ops = {
-	.prepare_transfer_hardware = fw_spi_prepare_transfer_hardware,
-	.unprepare_transfer_hardware = fw_spi_unprepare_transfer_hardware,
-};
-
-static struct spilib_ops *spilib_ops = &__spilib_ops;
-#else
-static struct spilib_ops *spilib_ops = NULL;
-#endif
+static struct spilib_ops *spilib_ops;
 
 struct gb_connection *to_fw_mgmt_connection(struct device *dev)
 {

drivers/staging/greybus/kernel_ver.h

@@ -86,19 +86,6 @@
 	#define POWER_SUPPLY_PROP_CALIBRATE	-1
 #endif
 
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 16, 0)
-#define SPI_DEV_MODALIAS "spidev"
-#define SPI_NOR_MODALIAS "spi-nor"
-#else
-#define SPI_DEV_MODALIAS "spidev"
-#define SPI_NOR_MODALIAS "m25p80"
-#endif
-
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 12, 0)
-/* Starting from this version, the spi core handles runtime pm automatically */
-#define SPI_CORE_SUPPORT_PM
-#endif
-
 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 19, 0)
 /*
  * After commit b2b49ccbdd54 (PM: Kconfig: Set PM_RUNTIME if PM_SLEEP is

drivers/staging/greybus/spi.c

@@ -13,26 +13,7 @@
 #include "gbphy.h"
 #include "spilib.h"
 
-#ifndef SPI_CORE_SUPPORT_PM
-static int gbphy_spi_prepare_transfer_hardware(struct device *dev)
-{
-	return gbphy_runtime_get_sync(to_gbphy_dev(dev));
-}
-
-static void gbphy_spi_unprepare_transfer_hardware(struct device *dev)
-{
-	gbphy_runtime_put_autosuspend(to_gbphy_dev(dev));
-}
-
-static struct spilib_ops __spilib_ops = {
-	.prepare_transfer_hardware = gbphy_spi_prepare_transfer_hardware,
-	.unprepare_transfer_hardware = gbphy_spi_unprepare_transfer_hardware,
-};
-
-static struct spilib_ops *spilib_ops = &__spilib_ops;
-#else
-static struct spilib_ops *spilib_ops = NULL;
-#endif
+static struct spilib_ops *spilib_ops;
 
 static int gb_spi_probe(struct gbphy_device *gbphy_dev,
 			const struct gbphy_device_id *id)

drivers/staging/greybus/spilib.c

@@ -456,10 +456,10 @@ static int gb_spi_setup_device(struct gb_spilib *spi, u8 cs)
 	dev_type = response.device_type;
 
 	if (dev_type == GB_SPI_SPI_DEV)
-		strlcpy(spi_board.modalias, SPI_DEV_MODALIAS,
+		strlcpy(spi_board.modalias, "spidev",
 			sizeof(spi_board.modalias));
 	else if (dev_type == GB_SPI_SPI_NOR)
-		strlcpy(spi_board.modalias, SPI_NOR_MODALIAS,
+		strlcpy(spi_board.modalias, "spi-nor",
 			sizeof(spi_board.modalias));
 	else if (dev_type == GB_SPI_SPI_MODALIAS)
 		memcpy(spi_board.modalias, response.name,
@@ -526,9 +526,7 @@ int gb_spilib_master_init(struct gb_connection *connection, struct device *dev,
 			gb_spi_unprepare_transfer_hardware;
 	}
 
-#ifdef SPI_CORE_SUPPORT_PM
 	master->auto_runtime_pm = true;
-#endif
 
 	ret = spi_register_master(master);
 	if (ret < 0)