mcp795_rtcc_write
ret = mcp795_rtcc_write(dev, addr, &tmp, 1);
ret = mcp795_rtcc_write(dev, MCP795_REG_SECONDS, data, 5);
ret = mcp795_rtcc_write(dev, MCP795_REG_MONTH, &data[5], 2);
ret = mcp795_rtcc_write(dev, MCP795_REG_ALM0_SECONDS, tmp, sizeof(tmp));