spi: zynqmp-gqspi: Set recommended tap delay values for Versal

In Versal, valid qspi frequency ranges are 37.5MHz, 100MHz
and 150MHz.

This patch sets the recommended clock and data tap delay
values for above mentioned frequency ranges.

Signed-off-by: Amit Kumar Mahapatra <amit.kumar-mahapatra@xilinx.com>
Acked-by: Naga Sureshkumar Relli <naga.sureshkumar.relli@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>

drivers/spi/spi-zynqmp-gqspi.c

@@ -159,6 +159,7 @@
 /* set to differentiate versal from zynqmp, 1=versal, 0=zynqmp */
 #define QSPI_QUIRK_HAS_TAPDELAY	BIT(0)
 
+#define GQSPI_FREQ_37_5MHZ	37500000
 #define GQSPI_FREQ_40MHZ	40000000
 #define GQSPI_FREQ_100MHZ	100000000
 #define GQSPI_FREQ_150MHZ	150000000
@@ -331,19 +332,19 @@ static void zynqmp_qspi_set_tapdelay(struct zynqmp_qspi *xqspi, u32 baudrateval)
 			lpbkdlyadj |= GQSPI_LPBK_DLY_ADJ_USE_LPBK_MASK;
 		}
 	} else {
-		if (reqhz <= GQSPI_FREQ_40MHZ) {
+		if (reqhz <= GQSPI_FREQ_37_5MHZ) {
 			tapdlybypass |= (TAP_DLY_BYPASS_LQSPI_RX_VALUE <<
 					TAP_DLY_BYPASS_LQSPI_RX_SHIFT);
 		} else if (reqhz <= GQSPI_FREQ_100MHZ) {
 			tapdlybypass |= (TAP_DLY_BYPASS_LQSPI_RX_VALUE <<
 					TAP_DLY_BYPASS_LQSPI_RX_SHIFT);
 			lpbkdlyadj |= (GQSPI_LPBK_DLY_ADJ_USE_LPBK_MASK);
-			datadlyadj |= ((GQSPI_USE_DATA_DLY <<
-					GQSPI_USE_DATA_DLY_SHIFT)
-					| (GQSPI_DATA_DLY_ADJ_VALUE <<
-						GQSPI_DATA_DLY_ADJ_SHIFT));
+			datadlyadj |= (GQSPI_USE_DATA_DLY <<
+					GQSPI_USE_DATA_DLY_SHIFT);
 		} else if (reqhz <= GQSPI_FREQ_150MHZ) {
-			lpbkdlyadj |= GQSPI_LPBK_DLY_ADJ_USE_LPBK_MASK;
+			lpbkdlyadj |= (GQSPI_LPBK_DLY_ADJ_USE_LPBK_MASK
+				       | (GQSPI_LPBK_DLY_ADJ_DLY_1 <<
+					       GQSPI_LPBK_DLY_ADJ_DLY_1_SHIFT));
 		}
 		zynqmp_gqspi_write(xqspi,
 				IOU_TAPDLY_BYPASS_OFST, tapdlybypass);