18c2ecf20Sopenharmony_ciBindings for the Broadcom's brcm,bcm6345-gpio memory-mapped GPIO controllers. 28c2ecf20Sopenharmony_ci 38c2ecf20Sopenharmony_ciThese bindings can be used on any BCM63xx SoC. However, BCM6338 and BCM6345 48c2ecf20Sopenharmony_ciare the only ones which don't need a pinctrl driver. 58c2ecf20Sopenharmony_ciBCM6338 have 8-bit data and dirout registers, where GPIO state can be read 68c2ecf20Sopenharmony_ciand/or written, and the direction changed from input to output. 78c2ecf20Sopenharmony_ciBCM6345 have 16-bit data and dirout registers, where GPIO state can be read 88c2ecf20Sopenharmony_ciand/or written, and the direction changed from input to output. 98c2ecf20Sopenharmony_ci 108c2ecf20Sopenharmony_ciRequired properties: 118c2ecf20Sopenharmony_ci - compatible: should be "brcm,bcm6345-gpio" 128c2ecf20Sopenharmony_ci - reg-names: must contain 138c2ecf20Sopenharmony_ci "dat" - data register 148c2ecf20Sopenharmony_ci "dirout" - direction (output) register 158c2ecf20Sopenharmony_ci - reg: address + size pairs describing the GPIO register sets; 168c2ecf20Sopenharmony_ci order must correspond with the order of entries in reg-names 178c2ecf20Sopenharmony_ci - #gpio-cells: must be set to 2. The first cell is the pin number and 188c2ecf20Sopenharmony_ci the second cell is used to specify the gpio polarity: 198c2ecf20Sopenharmony_ci 0 = active high 208c2ecf20Sopenharmony_ci 1 = active low 218c2ecf20Sopenharmony_ci - gpio-controller: Marks the device node as a gpio controller. 228c2ecf20Sopenharmony_ci 238c2ecf20Sopenharmony_ciOptional properties: 248c2ecf20Sopenharmony_ci - native-endian: use native endian memory. 258c2ecf20Sopenharmony_ci 268c2ecf20Sopenharmony_ciExamples: 278c2ecf20Sopenharmony_ci - BCM6338: 288c2ecf20Sopenharmony_ci gpio: gpio-controller@fffe0407 { 298c2ecf20Sopenharmony_ci compatible = "brcm,bcm6345-gpio"; 308c2ecf20Sopenharmony_ci reg-names = "dirout", "dat"; 318c2ecf20Sopenharmony_ci reg = <0xfffe0407 1>, <0xfffe040f 1>; 328c2ecf20Sopenharmony_ci 338c2ecf20Sopenharmony_ci #gpio-cells = <2>; 348c2ecf20Sopenharmony_ci gpio-controller; 358c2ecf20Sopenharmony_ci }; 368c2ecf20Sopenharmony_ci 378c2ecf20Sopenharmony_ci - BCM6345: 388c2ecf20Sopenharmony_ci gpio: gpio-controller@fffe0406 { 398c2ecf20Sopenharmony_ci compatible = "brcm,bcm6345-gpio"; 408c2ecf20Sopenharmony_ci reg-names = "dirout", "dat"; 418c2ecf20Sopenharmony_ci reg = <0xfffe0406 2>, <0xfffe040a 2>; 428c2ecf20Sopenharmony_ci native-endian; 438c2ecf20Sopenharmony_ci 448c2ecf20Sopenharmony_ci #gpio-cells = <2>; 458c2ecf20Sopenharmony_ci gpio-controller; 468c2ecf20Sopenharmony_ci }; 47