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path: root/lib/utils/gpio
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2021-11-03lib: utils/gpio: use list for driversNikita Shubin
Convert static array to sbi_list. This removes size limitation, makes add/remove more efficient and saves space. Signed-off-by: Nikita Shubin <n.shubin@yadro.com> Reviewed-by: Anup Patel <anup.patel@wdc.com>
2021-08-14lib: utils: Extend fdt_get_node_addr_size() for multiple register setsAnup Patel
We add "index" parameter to fdt_get_node_addr_size() API so that calling function can specify index of desired register set. This will allow fdt_get_node_addr_size() to handle DT nodes with multiple register sets. Signed-off-by: Anup Patel <anup.patel@wdc.com> Reviewed-by: Atish Patra <atish.patra@wdc.com>
2021-08-07lib: utils/fdt: Change addr and size to uint64_tBin Meng
The maximum address and size encoded in DT are 64-bit numbers, so we should use uint64_t for 'addr' and 'size' in fdt_get_node_addr_size(). Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Anup Patel <anup.patel@wdc.com>
2021-07-17lib: utils/gpio: Add minimal SiFive GPIO driverGreen Wan
We add a minimal SiFive GPIO driver so that we can do GPIO based system power-off and reset. Signed-off-by: Green Wan <green.wan@sifive.com> Signed-off-by: Anup Patel <anup.patel@wdc.com> Reviewed-by: Atish Patra <atish.patra@wdc.com>
2021-07-17lib: utils/gpio: Add simple FDT based GPIO frameworkAnup Patel
We add a simple FDT based GPIO framework which is built on top of generic GPIO library. The phandle of FDT GPIO chip DT node is treated as unique GPIO chip ID required by the generic GPIO library. The FDT based GPIO chip drivers will be probed on-demand from fdt_gpio_pin_get() called by the GPIO client drivers. Signed-off-by: Anup Patel <anup.patel@wdc.com> Reviewed-by: Atish Patra <atish.patra@wdc.com>
2021-07-17lib: utils/gpio: Add generic GPIO configuration libraryAnup Patel
We add generic GPIO configuration library which is independent of hardware description format (FDT or ACPI). The OpenSBI platform support or GPIO drivers can register GPIO chip instances which can be discovered and used by different GPIO clients. Each GPIO chip instance has a unique ID which can be used by GPIO clients to lookup GPIO chip instance. Signed-off-by: Anup Patel <anup.patel@wdc.com> Reviewed-by: Atish Patra <atish.patra@wdc.com>