#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <fcntl.h>
#include <string.h>

#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/stat.h>

#include <linux/types.h>
#include <linux/spi/spidev.h>


static int verbose;

static void do_read(int fd, int len)
{
	unsigned char	buf[32], *bp;
	int		status;

	/* read at least 2 bytes, no more than 32 */
	if (len < 2)
		len = 2;
	else if (len > sizeof(buf))
		len = sizeof(buf);
	memset(buf, 0, sizeof buf);

	status = read(fd, buf, len);
	if (status < 0) {
		perror("read");
		return;
	}
	if (status != len) {
		fprintf(stderr, "short read\n");
		return;
	}

	printf("read(%2d, %2d): %02x %02x,", len, status,
		buf[0], buf[1]);
	status -= 2;
	bp = buf + 2;
	while (status-- > 0)
		printf(" %02x", *bp++);
	printf("\n");
}

static void do_msg(int fd, int len)
{
	struct spi_ioc_transfer	xfer[2];
	unsigned char		buf[32], *bp;
	int			status;

	memset(xfer, 0, sizeof xfer);
	memset(buf, 0, sizeof buf);

	if (len > sizeof buf)
		len = sizeof buf;

	buf[0] = 0xaa;
	xfer[0].tx_buf = (unsigned long)buf;
	xfer[0].len = 1;

	xfer[1].rx_buf = (unsigned long) buf;
	xfer[1].len = len;

	status = ioctl(fd, SPI_IOC_MESSAGE(2), xfer);
	if (status < 0) {
		perror("SPI_IOC_MESSAGE");
		return;
	}

	printf("response(%2d, %2d): ", len, status);
	for (bp = buf; len; len--)
		printf(" %02x", *bp++);
	printf("\n");
}

static void dumpstat(const char *name, int fd)
{
	__u8	lsb, bits;
	__u32	mode, speed;

	if (ioctl(fd, SPI_IOC_RD_MODE32, &mode) < 0) {
		perror("SPI rd_mode");
		return;
	}
	if (ioctl(fd, SPI_IOC_RD_LSB_FIRST, &lsb) < 0) {
		perror("SPI rd_lsb_fist");
		return;
	}
	if (ioctl(fd, SPI_IOC_RD_BITS_PER_WORD, &bits) < 0) {
		perror("SPI bits_per_word");
		return;
	}
	if (ioctl(fd, SPI_IOC_RD_MAX_SPEED_HZ, &speed) < 0) {
		perror("SPI max_speed_hz");
		return;
	}

	printf("%s: spi mode 0x%x, %d bits %sper word, %d Hz max\n",
		name, mode, bits, lsb ? "(lsb first) " : "", speed);
}

int main(int argc, char **argv)
{
	int		c;
	int		readcount = 0;
	int		msglen = 0;
	int		fd;
	const char	*name;

	while ((c = getopt(argc, argv, "hm:r:v")) != EOF) {
		switch (c) {
		case 'm':
			msglen = atoi(optarg);
			if (msglen < 0)
				goto usage;
			continue;
		case 'r':
			readcount = atoi(optarg);
			if (readcount < 0)
				goto usage;
			continue;
		case 'v':
			verbose++;
			continue;
		case 'h':
		case '?':
usage:
			fprintf(stderr,
				"usage: %s [-h] [-m N] [-r N] /dev/spidevB.D\n",
				argv[0]);
			return 1;
		}
	}

	if ((optind + 1) != argc)
		goto usage;
	name = argv[optind];

	fd = open(name, O_RDWR);
	if (fd < 0) {
		perror("open");
		return 1;
	}

	dumpstat(name, fd);

	if (msglen)
		do_msg(fd, msglen);

	if (readcount)
		do_read(fd, readcount);

	close(fd);
	return 0;
}
alue='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?h=nds-private-remove&amp;id=edb6fa1a6452edf736c04d02e3f6de59043df69e'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include?h=nds-private-remove&amp;id=edb6fa1a6452edf736c04d02e3f6de59043df69e'>include</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include/clocksource?h=nds-private-remove&amp;id=edb6fa1a6452edf736c04d02e3f6de59043df69e'>clocksource</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include/clocksource/pxa.h?h=nds-private-remove&amp;id=edb6fa1a6452edf736c04d02e3f6de59043df69e'>pxa.h</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='h' value='nds-private-remove'/><input type='hidden' name='id' value='edb6fa1a6452edf736c04d02e3f6de59043df69e'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Luuk Paulussen &lt;luuk.paulussen@alliedtelesis.co.nz&gt;</td><td class='right'>2016-12-08 11:43:34 +1300</td></tr>
<tr><th>committer</th><td>Ralf Baechle &lt;ralf@linux-mips.org&gt;</td><td class='right'>2016-12-11 11:19:04 +0100</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/clocksource/pxa.h?h=nds-private-remove&amp;id=edb6fa1a6452edf736c04d02e3f6de59043df69e'>edb6fa1a6452edf736c04d02e3f6de59043df69e</a> (<a href='/cgit.cgi/linux/net-next.git/patch/include/clocksource/pxa.h?id=edb6fa1a6452edf736c04d02e3f6de59043df69e'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?h=nds-private-remove&amp;id=edb6fa1a6452edf736c04d02e3f6de59043df69e'>f854dd896b1e5033a26f305ec9a50a87b1b13939</a> /<a href='/cgit.cgi/linux/net-next.git/tree/include/clocksource/pxa.h?h=nds-private-remove&amp;id=edb6fa1a6452edf736c04d02e3f6de59043df69e'>include/clocksource/pxa.h</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/clocksource/pxa.h?h=nds-private-remove&amp;id=3e5de27e940d00d8d504dfb96625fb654f641509'>3e5de27e940d00d8d504dfb96625fb654f641509</a> (<a href='/cgit.cgi/linux/net-next.git/diff/include/clocksource/pxa.h?h=nds-private-remove&amp;id=edb6fa1a6452edf736c04d02e3f6de59043df69e&amp;id2=3e5de27e940d00d8d504dfb96625fb654f641509'>diff</a>)</td></tr></table>
<div class='commit-subject'>MIPS: Return -ENODEV from weak implementation of rtc_mips_set_time</div><div class='commit-msg'>The sync_cmos_clock function in kernel/time/ntp.c first tries to update
the internal clock of the cpu by calling the "update_persistent_clock64"
architecture specific function.  If this returns -ENODEV, it then tries
to update an external RTC using "rtc_set_ntp_time".

On the mips architecture, the weak implementation of the underlying
function would return 0 if it wasn't overridden.  This meant that the
sync_cmos_clock function would never try to update an external RTC
(if both CONFIG_GENERIC_CMOS_UPDATE and CONFIG_RTC_SYSTOHC are
configured)

Returning -ENODEV instead, means that an external RTC will be tried.

Signed-off-by: Luuk Paulussen &lt;luuk.paulussen@alliedtelesis.co.nz&gt;
Reviewed-by: Richard Laing &lt;richard.laing@alliedtelesis.co.nz&gt;
Reviewed-by: Scott Parlane &lt;scott.parlane@alliedtelesis.co.nz&gt;
Reviewed-by: Chris Packham &lt;chris.packham@alliedtelesis.co.nz&gt;
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/14649/
Signed-off-by: Ralf Baechle &lt;ralf@linux-mips.org&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove&amp;id=edb6fa1a6452edf736c04d02e3f6de59043df69e'>Diffstat</a> (limited to 'include/clocksource/pxa.h')</div><table summary='diffstat' class='diffstat'>