MCP795_REG_ALM0_SECONDS
ret = mcp795_rtcc_read(dev, MCP795_REG_ALM0_SECONDS, tmp, sizeof(tmp));
ret = mcp795_rtcc_write(dev, MCP795_REG_ALM0_SECONDS, tmp, sizeof(tmp));
dev, MCP795_REG_ALM0_SECONDS, data, sizeof(data));