static int sdw_slave_reg_show()

in debugfs.c [47:118]

• 45 lines of code
• 11 McCabe index (conditional complexity)

static int sdw_slave_reg_show(struct seq_file *s_file, void *data)
{
	struct sdw_slave *slave = s_file->private;
	char *buf;
	ssize_t ret;
	int i, j;

	buf = kzalloc(RD_BUF, GFP_KERNEL);
	if (!buf)
		return -ENOMEM;

	ret = scnprintf(buf, RD_BUF, "Register  Value\n");

	/* DP0 non-banked registers */
	ret += scnprintf(buf + ret, RD_BUF - ret, "\nDP0\n");
	for (i = SDW_DP0_INT; i <= SDW_DP0_PREPARECTRL; i++)
		ret += sdw_sprintf(slave, buf, ret, i);

	/* DP0 Bank 0 registers */
	ret += scnprintf(buf + ret, RD_BUF - ret, "Bank0\n");
	ret += sdw_sprintf(slave, buf, ret, SDW_DP0_CHANNELEN);
	for (i = SDW_DP0_SAMPLECTRL1; i <= SDW_DP0_LANECTRL; i++)
		ret += sdw_sprintf(slave, buf, ret, i);

	/* DP0 Bank 1 registers */
	ret += scnprintf(buf + ret, RD_BUF - ret, "Bank1\n");
	ret += sdw_sprintf(slave, buf, ret,
			SDW_DP0_CHANNELEN + SDW_BANK1_OFFSET);
	for (i = SDW_DP0_SAMPLECTRL1 + SDW_BANK1_OFFSET;
			i <= SDW_DP0_LANECTRL + SDW_BANK1_OFFSET; i++)
		ret += sdw_sprintf(slave, buf, ret, i);

	/* SCP registers */
	ret += scnprintf(buf + ret, RD_BUF - ret, "\nSCP\n");
	for (i = SDW_SCP_INT1; i <= SDW_SCP_BANKDELAY; i++)
		ret += sdw_sprintf(slave, buf, ret, i);
	for (i = SDW_SCP_DEVID_0; i <= SDW_SCP_DEVID_5; i++)
		ret += sdw_sprintf(slave, buf, ret, i);

	/*
	 * SCP Bank 0/1 registers are read-only and cannot be
	 * retrieved from the Slave. The Master typically keeps track
	 * of the current frame size so the information can be found
	 * in other places
	 */

	/* DP1..14 registers */
	for (i = 1; SDW_VALID_PORT_RANGE(i); i++) {

		/* DPi registers */
		ret += scnprintf(buf + ret, RD_BUF - ret, "\nDP%d\n", i);
		for (j = SDW_DPN_INT(i); j <= SDW_DPN_PREPARECTRL(i); j++)
			ret += sdw_sprintf(slave, buf, ret, j);

		/* DPi Bank0 registers */
		ret += scnprintf(buf + ret, RD_BUF - ret, "Bank0\n");
		for (j = SDW_DPN_CHANNELEN_B0(i);
		     j <= SDW_DPN_LANECTRL_B0(i); j++)
			ret += sdw_sprintf(slave, buf, ret, j);

		/* DPi Bank1 registers */
		ret += scnprintf(buf + ret, RD_BUF - ret, "Bank1\n");
		for (j = SDW_DPN_CHANNELEN_B1(i);
		     j <= SDW_DPN_LANECTRL_B1(i); j++)
			ret += sdw_sprintf(slave, buf, ret, j);
	}

	seq_printf(s_file, "%s", buf);
	kfree(buf);

	return 0;
}