driver/mtd/spi:Read 8KB data chunk during u-boot load in SPL

SPI driver perform its operation(read/write) on 64KB buffer chunk for data
greater than 64KB. This buffer chunk is allocated from system heap.

During SPL boot, 768KB of data is read from SPI flash.
Here, heap size may not be sufficient enough to full-fill 64KB buffer
requirement of SPI driver. So break down u-boot read operation at 8KB of chunk.

Also, fix a warning i.e. "unused variable buf" during CONFIG_FSL_CORENET

Signed-off-by: Prabhakar Kushwaha <prabhakar@freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>

diff --git a/drivers/mtd/spi/fsl_espi_spl.c b/drivers/mtd/spi/fsl_espi_spl.c
index e5ac79b9520db5e975575229e74266015f099997..a55d741a3702a7b561284cae04c6c49551e01834 100644 (file)
--- a/drivers/mtd/spi/fsl_espi_spl.c
+++ b/drivers/mtd/spi/fsl_espi_spl.c
@@ -20,8 +20,10 @@
 void spi_boot(void)
 {
        void (*uboot)(void) __noreturn;
-       u32 offset, code_len;
+       u32 offset, code_len, copy_len = 0;
+#ifndef CONFIG_FSL_CORENET
        unsigned char *buf = NULL;
+#endif
        struct spi_flash *flash;
 
        flash = spi_flash_probe(CONFIG_ENV_SPI_BUS, CONFIG_ENV_SPI_CS,
@@ -56,8 +58,15 @@ void spi_boot(void)
        code_len = code_len - CONFIG_SPL_MAX_SIZE;
 #endif
        /* copy code to DDR */
-       spi_flash_read(flash, offset, code_len,
-                      (void *)CONFIG_SYS_SPI_FLASH_U_BOOT_DST);
+       printf("Loading second stage boot loader ");
+       while (copy_len <= code_len) {
+               spi_flash_read(flash, offset + copy_len, 0x2000,
+                              (void *)(CONFIG_SYS_SPI_FLASH_U_BOOT_DST
+                              + copy_len));
+               copy_len = copy_len + 0x2000;
+               putc('.');
+       }
+
        /*
        * Jump to U-Boot image
        */