diff options
| author | Michal Simek | 2022-02-07 10:27:37 +0100 |
|---|---|---|
| committer | Michal Simek | 2022-02-15 13:01:42 +0100 |
| commit | e0283cbdfd49a437ef3cfdd662b196d2f70b5ea0 (patch) | |
| tree | d845cd6b699bc029289a76bda1d065234a24c1ba /drivers/firmware | |
| parent | 2f9dd4bfc7a2d618c9c76448dd7b3ce67c6ec4ce (diff) | |
power: zynqmp: Add power domain driver for ZynqMP
Driver should be enabled by CONFIG_POWER_DOMAIN=y and
CONFIG_ZYNQMP_POWER_DOMAIN=y. Power domain driver doesn't have own DT node
but it uses zynqmp firmware DT node that's why there is a need to bind
driver when firmware node is found.
Driver itself is simple. It is sending pmufw config object overlay for
enabling access to device which is done in ...domain_request().
In ...domain_on() capabilities are passed and node is requested.
This should be bare minimum of required to get power domain driver working.
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
Link: https://lore.kernel.org/r/f4b9433b91c0b18c375b061c7a4e29d428f70547.1644226055.git.michal.simek@xilinx.com
Diffstat (limited to 'drivers/firmware')
| -rw-r--r-- | drivers/firmware/firmware-zynqmp.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/firmware/firmware-zynqmp.c b/drivers/firmware/firmware-zynqmp.c index 839203ec82a..8d78888eff7 100644 --- a/drivers/firmware/firmware-zynqmp.c +++ b/drivers/firmware/firmware-zynqmp.c @@ -8,6 +8,7 @@ #include <common.h> #include <cpu_func.h> #include <dm.h> +#include <dm/lists.h> #include <log.h> #include <zynqmp_firmware.h> #include <asm/cache.h> @@ -226,8 +227,27 @@ static const struct udevice_id zynqmp_firmware_ids[] = { { } }; +static int zynqmp_firmware_bind(struct udevice *dev) +{ + int ret; + struct udevice *child; + + if (IS_ENABLED(CONFIG_ZYNQMP_POWER_DOMAIN)) { + ret = device_bind_driver_to_node(dev, "zynqmp_power_domain", + "zynqmp_power_domain", + dev_ofnode(dev), &child); + if (ret) { + printf("zynqmp power domain driver is not bound: %d\n", ret); + return ret; + } + } + + return dm_scan_fdt_dev(dev); +} + U_BOOT_DRIVER(zynqmp_firmware) = { .id = UCLASS_FIRMWARE, .name = "zynqmp_firmware", .of_match = zynqmp_firmware_ids, + .bind = zynqmp_firmware_bind, }; |