qspi: dra7x: enable quad mode read for ti-qspi driver

This patch enables QUAD read mode for qspi to improve the
read performace while loading the binaries from qspi.

Signed-off-by: Ravi Babu <ravibabu@ti.com>
Reviewed-by: Jagannadha Sutradharudu Teki <jagannadh.teki@gmail.com>

drivers/spi/ti_qspi.c

@@ -109,10 +109,17 @@ static void ti_spi_setup_spi_register(struct ti_qspi_slave *qslave)
 	slave->op_mode_rx = 8;
 #endif
 
+#ifdef CONFIG_QSPI_QUAD_SUPPORT
+	memval |= (QSPI_CMD_READ_QUAD | QSPI_SETUP0_NUM_A_BYTES |
+			QSPI_SETUP0_NUM_D_BYTES_8_BITS |
+			QSPI_SETUP0_READ_QUAD | QSPI_CMD_WRITE |
+			QSPI_NUM_DUMMY_BITS);
+#else
 	memval |= QSPI_CMD_READ | QSPI_SETUP0_NUM_A_BYTES |
 			QSPI_SETUP0_NUM_D_BYTES_NO_BITS |
 			QSPI_SETUP0_READ_NORMAL | QSPI_CMD_WRITE |
 			QSPI_NUM_DUMMY_BITS;
+#endif
 
 	writel(memval, &qslave->base->setup0);
 }

include/configs/dra7xx_evm.h

@@ -77,6 +77,7 @@
 #define CONFIG_TI_SPI_MMAP
 #define CONFIG_SF_DEFAULT_SPEED                48000000
 #define CONFIG_DEFAULT_SPI_MODE                SPI_MODE_3
+#define CONFIG_QSPI_QUAD_SUPPORT
 
 /*
  * Default to using SPI for environment, etc.