There are gpio pins reserved for special usages and those pins are prohibited from read by HLOS such as Linux Kernel. Add no_read field in pinctrl_pin_desc structure to earmark such usage. When dump gpio information through debugfs /d/gpio, those pins will be skipped. Bug 73898164 Change-Id: I1bda1255c84831e88d6afcf82eac7ec6292933e0 Signed-off-by: Wen Yi <weyi@google.com>