Lines Matching refs:registers

12 major sets of registers exist:
14 a) Security registers, which allow configuration of allowed access to the GPIO
15 register set. These registers exist in a single contiguous block of physical
19 Access to this set of registers is not necessary in all circumstances. Code
20 that wishes to configure access to the GPIO registers needs access to these
21 registers to do so. Code which simply wishes to read or write GPIO data does not
22 need access to these registers.
24 b) GPIO registers, which allow manipulation of the GPIO signals. In some GPIO
25 controllers, these registers are exposed via multiple "physical aliases" in
37 implemented GPIOs within each port varies. GPIO registers within a controller
75     - "gpio": Mandatory. GPIO control registers. This may cover either:
80     - "security": Optional. Security configuration registers.