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Commit c2e78c34 authored by Geert Uytterhoeven's avatar Geert Uytterhoeven Committed by Mark Brown
Browse files

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



Signed-off-by: default avatarGeert Uytterhoeven <geert+renesas@linux-m68k.org>
Signed-off-by: default avatarMark Brown <broonie@linaro.org>
parent dc64d39b

Documentation/spi/spidev_test.c

+37 −6
Original line number Diff line number Diff line
@@ -30,7 +30,7 @@ static void pabort(const char *s) 
}



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;
@@ -57,6 +57,21 @@ static void transfer(int fd) 
		.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)

		pabort("can't send spi message");
@@ -83,7 +98,9 @@ static void print_usage(const char *prog) 
	     "  -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);

}
@@ -103,11 +120,13 @@ static void parse_opts(int argc, char *argv[]) 
			{ "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;
@@ -149,11 +168,23 @@ static void parse_opts(int argc, char *argv[]) 
		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;

	}

}



int main(int argc, char *argv[])
@@ -170,11 +201,11 @@ int main(int argc, char *argv[]) 
	/*

	 * 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");
@@ -200,7 +231,7 @@ int main(int argc, char *argv[]) 
	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);