+static ssize_t cdns_reg_read(struct file *file, char __user *user_buf,
+ size_t count, loff_t *ppos)
+{
+ struct sdw_cdns *cdns = file->private_data;
+ 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");
+ ret += scnprintf(buf + ret, RD_BUF - ret, "\nMCP Registers\n");
+ for (i = 0; i < 8; i++) /* 8 MCP registers */
+ ret += cdns_sprintf(cdns, buf, ret, i * 4);
+
+ ret += scnprintf(buf + ret, RD_BUF - ret,
+ "\nStatus & Intr Registers\n");
+ for (i = 0; i < 13; i++) /* 13 Status & Intr registers */
+ ret += cdns_sprintf(cdns, buf, ret, CDNS_MCP_STAT + i * 4);
+
+ ret += scnprintf(buf + ret, RD_BUF - ret,
+ "\nSSP & Clk ctrl Registers\n");
+ ret += cdns_sprintf(cdns, buf, ret, CDNS_MCP_SSP_CTRL0);
+ ret += cdns_sprintf(cdns, buf, ret, CDNS_MCP_SSP_CTRL1);
+ ret += cdns_sprintf(cdns, buf, ret, CDNS_MCP_CLK_CTRL0);
+ ret += cdns_sprintf(cdns, buf, ret, CDNS_MCP_CLK_CTRL1);
+
+ ret += scnprintf(buf + ret, RD_BUF - ret,
+ "\nDPn B0 Registers\n");
+ for (i = 0; i < 7; i++) {
+ ret += scnprintf(buf + ret, RD_BUF - ret,
+ "\nDP-%d\n", i);
+ for (j = 0; j < 6; j++)
+ ret += cdns_sprintf(cdns, buf, ret,
+ CDNS_DPN_B0_CONFIG(i) + j * 4);
+ }
+
+ ret += scnprintf(buf + ret, RD_BUF - ret,
+ "\nDPn B1 Registers\n");
+ for (i = 0; i < 7; i++) {
+ ret += scnprintf(buf + ret, RD_BUF - ret,
+ "\nDP-%d\n", i);
+
+ for (j = 0; j < 6; j++)
+ ret += cdns_sprintf(cdns, buf, ret,
+ CDNS_DPN_B1_CONFIG(i) + j * 4);
+ }
+
+ ret += scnprintf(buf + ret, RD_BUF - ret,
+ "\nDPn Control Registers\n");
+ for (i = 0; i < 7; i++)
+ ret += cdns_sprintf(cdns, buf, ret,
+ CDNS_PORTCTRL + i * CDNS_PORT_OFFSET);
+
+ ret += scnprintf(buf + ret, RD_BUF - ret,
+ "\nPDIn Config Registers\n");
+ for (i = 0; i < 7; i++)
