spl: mmc: Rename spl_boot_mode() to spl_mmc_boot_mode()

The function's name is misleading as one might think it is used
generally to select the boot-mode when in reality it is only used by the
MMC driver to find out in what way it should try reading U-Boot Proper
from a device (either using a filesystem, a raw sector/partition, or an
eMMC boot partition).

Rename it to spl_mmc_boot_mode() to make it more obvious what this
function is about.

Link: https://lists.denx.de/pipermail/u-boot/2020-April/405979.html
Signed-off-by: Harald Seiler <hws@denx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>

arch/arm/mach-imx/spl.c

@@ -189,7 +189,7 @@ int g_dnl_bind_fixup(struct usb_device_descriptor *dev, const char *name)
 
 #if defined(CONFIG_SPL_MMC_SUPPORT)
 /* called from spl_mmc to see type of boot mode for storage (RAW or FAT) */
-u32 spl_boot_mode(const u32 boot_device)
+u32 spl_mmc_boot_mode(const u32 boot_device)
 {
 #if defined(CONFIG_MX7) || defined(CONFIG_IMX8M) || defined(CONFIG_IMX8)
 	switch (get_boot_device()) {

arch/arm/mach-k3/am6_init.c

@@ -199,7 +199,7 @@ void board_init_f(ulong dummy)
 #endif
 }
 
-u32 spl_boot_mode(const u32 boot_device)
+u32 spl_mmc_boot_mode(const u32 boot_device)
 {
 #if defined(CONFIG_SUPPORT_EMMC_BOOT)
 	u32 devstat = readl(CTRLMMR_MAIN_DEVSTAT);

arch/arm/mach-k3/j721e_init.c

@@ -223,7 +223,7 @@ void board_init_f(ulong dummy)
 #endif
 }
 
-u32 spl_boot_mode(const u32 boot_device)
+u32 spl_mmc_boot_mode(const u32 boot_device)
 {
 	switch (boot_device) {
 	case BOOT_DEVICE_MMC1:

arch/arm/mach-omap2/boot-common.c

@@ -187,7 +187,7 @@ u32 spl_boot_device(void)
 	return gd->arch.omap_boot_device;
 }
 
-u32 spl_boot_mode(const u32 boot_device)
+u32 spl_mmc_boot_mode(const u32 boot_device)
 {
 	return gd->arch.omap_boot_mode;
 }

arch/arm/mach-rockchip/spl.c

@@ -58,7 +58,7 @@ u32 spl_boot_device(void)
 	return boot_device;
 }
 
-u32 spl_boot_mode(const u32 boot_device)
+u32 spl_mmc_boot_mode(const u32 boot_device)
 {
 	return MMCSD_MODE_RAW;
 }

arch/arm/mach-socfpga/spl_a10.c

@@ -92,7 +92,7 @@ u32 spl_boot_device(void)
 }
 
 #ifdef CONFIG_SPL_MMC_SUPPORT
-u32 spl_boot_mode(const u32 boot_device)
+u32 spl_mmc_boot_mode(const u32 boot_device)
 {
 #if defined(CONFIG_SPL_FS_FAT) || defined(CONFIG_SPL_FS_EXT4)
 	return MMCSD_MODE_FS;

arch/arm/mach-socfpga/spl_agilex.c

@@ -28,7 +28,7 @@ u32 spl_boot_device(void)
 }
 
 #ifdef CONFIG_SPL_MMC_SUPPORT
-u32 spl_boot_mode(const u32 boot_device)
+u32 spl_mmc_boot_mode(const u32 boot_device)
 {
 #if defined(CONFIG_SPL_FS_FAT) || defined(CONFIG_SPL_FS_EXT4)
 	return MMCSD_MODE_FS;

arch/arm/mach-socfpga/spl_gen5.c

@@ -49,7 +49,7 @@ u32 spl_boot_device(void)
 }
 
 #ifdef CONFIG_SPL_MMC_SUPPORT
-u32 spl_boot_mode(const u32 boot_device)
+u32 spl_mmc_boot_mode(const u32 boot_device)
 {
 #if defined(CONFIG_SPL_FS_FAT) || defined(CONFIG_SPL_FS_EXT4)
 	return MMCSD_MODE_FS;

arch/arm/mach-socfpga/spl_s10.c

@@ -30,7 +30,7 @@ u32 spl_boot_device(void)
 }
 
 #ifdef CONFIG_SPL_MMC_SUPPORT
-u32 spl_boot_mode(const u32 boot_device)
+u32 spl_mmc_boot_mode(const u32 boot_device)
 {
 #if defined(CONFIG_SPL_FS_FAT) || defined(CONFIG_SPL_FS_EXT4)
 	return MMCSD_MODE_FS;

arch/arm/mach-stm32mp/spl.c

@@ -44,7 +44,7 @@ u32 spl_boot_device(void)
 	return BOOT_DEVICE_MMC1;
 }
 
-u32 spl_boot_mode(const u32 boot_device)
+u32 spl_mmc_boot_mode(const u32 boot_device)
 {
 	return MMCSD_MODE_RAW;
 }

arch/arm/mach-uniphier/mmc-boot-mode.c

@@ -8,7 +8,7 @@
 #include <mmc.h>
 #include <spl.h>
 
-u32 spl_boot_mode(const u32 boot_device)
+u32 spl_mmc_boot_mode(const u32 boot_device)
 {
 	struct mmc *mmc;
 

common/spl/spl_mmc.c

@@ -298,7 +298,7 @@ static int spl_mmc_do_fs_boot(struct spl_image_info *spl_image, struct mmc *mmc,
 }
 #endif
 
-u32 __weak spl_boot_mode(const u32 boot_device)
+u32 __weak spl_mmc_boot_mode(const u32 boot_device)
 {
 #if defined(CONFIG_SPL_FS_FAT) || defined(CONFIG_SPL_FS_EXT4)
 	return MMCSD_MODE_FS;
@@ -350,7 +350,7 @@ int spl_mmc_load(struct spl_image_info *spl_image,
 		}
 	}
 
-	boot_mode = spl_boot_mode(bootdev->boot_device);
+	boot_mode = spl_mmc_boot_mode(bootdev->boot_device);
 	err = -EINVAL;
 	switch (boot_mode) {
 	case MMCSD_MODE_EMMCBOOT:

include/spl.h

@@ -238,7 +238,23 @@ int spl_load_imx_container(struct spl_image_info *spl_image,
 /* SPL common functions */
 void preloader_console_init(void);
 u32 spl_boot_device(void);
-u32 spl_boot_mode(const u32 boot_device);
+
+/**
+ * spl_mmc_boot_mode() - Lookup function for the mode of an MMC boot source.
+ * @boot_device:	ID of the device which the MMC driver wants to read
+ *			from.  Common values are e.g. BOOT_DEVICE_MMC1,
+ *			BOOT_DEVICE_MMC2, BOOT_DEVICE_MMC2_2.
+ *
+ * This function should return one of MMCSD_MODE_FS, MMCSD_MODE_EMMCBOOT, or
+ * MMCSD_MODE_RAW for each MMC boot source which is defined for the target.  The
+ * boot_device parameter tells which device the MMC driver is interested in.
+ *
+ * If not overridden, it is weakly defined in common/spl/spl_mmc.c.
+ *
+ * Note:  It is important to use the boot_device parameter instead of e.g.
+ * spl_boot_device() as U-Boot is not always loaded from the same device as SPL.
+ */
+u32 spl_mmc_boot_mode(const u32 boot_device);
 int spl_boot_partition(const u32 boot_device);
 void spl_set_bd(void);