spi: spidev_test: Add support for Dual/Quad SPI Transfers

Signed-off-by: Geert Uytterhoeven <[e-mail]>
Signed-off-by: Mark Brown <[e-mail]>

Documentation/spi/spidev_test.c

···
 }
 
 static const char *device = "/dev/spidev1.1";
-static uint8_t mode;
+static uint32_t mode;
 static uint8_t bits = 8;
 static uint32_t speed = 500000;
 static uint16_t delay;
···
 		.speed_hz = speed,
 		.bits_per_word = bits,
 	};
+
+	if (mode & SPI_TX_QUAD)
+		tr.tx_nbits = 4;
+	else if (mode & SPI_TX_DUAL)
+		tr.tx_nbits = 2;
+	if (mode & SPI_RX_QUAD)
+		tr.rx_nbits = 4;
+	else if (mode & SPI_RX_DUAL)
+		tr.rx_nbits = 2;
+	if (!(mode & SPI_LOOP)) {
+		if (mode & (SPI_TX_QUAD | SPI_TX_DUAL))
+			tr.rx_buf = 0;
+		else if (mode & (SPI_RX_QUAD | SPI_RX_DUAL))
+			tr.tx_buf = 0;
+	}
 
 	ret = ioctl(fd, SPI_IOC_MESSAGE(1), &tr);
 	if (ret < 1)
···
 	     "  -C --cs-high  chip select active high\n"
 	     "  -3 --3wire    SI/SO signals shared\n"
 	     "  -N --no-cs    no chip select\n"
-	     "  -R --ready    slave pulls low to pause\n");
+	     "  -R --ready    slave pulls low to pause\n"
+	     "  -2 --dual     dual transfer\n"
+	     "  -4 --quad     quad transfer\n");
 	exit(1);
 }
 
···
 			{ "3wire",   0, 0, '3' },
 			{ "no-cs",   0, 0, 'N' },
 			{ "ready",   0, 0, 'R' },
+			{ "dual",    0, 0, '2' },
+			{ "quad",    0, 0, '4' },
 			{ NULL, 0, 0, 0 },
 		};
 		int c;
 
-		c = getopt_long(argc, argv, "D:s:d:b:lHOLC3NR", lopts, NULL);
+		c = getopt_long(argc, argv, "D:s:d:b:lHOLC3NR24", lopts, NULL);
 
 		if (c == -1)
 			break;
···
 		case 'R':
 			mode |= SPI_READY;
 			break;
+		case '2':
+			mode |= SPI_TX_DUAL;
+			break;
+		case '4':
+			mode |= SPI_TX_QUAD;
+			break;
 		default:
 			print_usage(argv[0]);
 			break;
 		}
+	}
+	if (mode & SPI_LOOP) {
+		if (mode & SPI_TX_DUAL)
+			mode |= SPI_RX_DUAL;
+		if (mode & SPI_TX_QUAD)
+			mode |= SPI_RX_QUAD;
 	}
 }
 
···
 	/*
 	 * spi mode
 	 */
-	ret = ioctl(fd, SPI_IOC_WR_MODE, &mode);
+	ret = ioctl(fd, SPI_IOC_WR_MODE32, &mode);
 	if (ret == -1)
 		pabort("can't set spi mode");
 
-	ret = ioctl(fd, SPI_IOC_RD_MODE, &mode);
+	ret = ioctl(fd, SPI_IOC_RD_MODE32, &mode);
 	if (ret == -1)
 		pabort("can't get spi mode");
 
···
 	if (ret == -1)
 		pabort("can't get max speed hz");
 
-	printf("spi mode: %d\n", mode);
+	printf("spi mode: 0x%x\n", mode);
 	printf("bits per word: %d\n", bits);
 	printf("max speed: %d Hz (%d KHz)\n", speed, speed/1000);