MCP795_REG_CONTROL
ret = mcp795_rtcc_read(dev, MCP795_REG_CONTROL, &data, 1);
dev, MCP795_REG_CONTROL, MCP795_EXTOSC_BIT, 0);
dev, MCP795_REG_CONTROL, MCP795_EXTOSC_BIT, data);
ret = mcp795_rtcc_set_bits(dev, MCP795_REG_CONTROL,
ret = mcp795_rtcc_set_bits(dev, MCP795_REG_CONTROL,