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

include/zynqmp_firmware.h

@@ -371,4 +371,35 @@ void zynqmp_pmufw_load_config_object(const void *cfg_obj, size_t size);
 int xilinx_pm_request(u32 api_id, u32 arg0, u32 arg1, u32 arg2,
 		      u32 arg3, u32 *ret_payload);
 
+/* Type of Config Object */
+#define PM_CONFIG_OBJECT_TYPE_BASE	0x1U
+#define PM_CONFIG_OBJECT_TYPE_OVERLAY	0x2U
+
+/* Section Id */
+#define PM_CONFIG_SLAVE_SECTION_ID	0x102U
+#define PM_CONFIG_SET_CONFIG_SECTION_ID	0x107U
+
+/* Flag Option */
+#define PM_SLAVE_FLAG_IS_SHAREABLE	0x1U
+#define PM_MASTER_USING_SLAVE_MASK	0x2U
+
+/* IPI Mask for Master */
+#define PM_CONFIG_IPI_PSU_CORTEXA53_0_MASK	0x00000001
+#define PM_CONFIG_IPI_PSU_CORTEXR5_0_MASK	0x00000100
+#define PM_CONFIG_IPI_PSU_CORTEXR5_1_MASK	0x00000200
+
+enum zynqmp_pm_request_ack {
+	ZYNQMP_PM_REQUEST_ACK_NO = 1,
+	ZYNQMP_PM_REQUEST_ACK_BLOCKING = 2,
+	ZYNQMP_PM_REQUEST_ACK_NON_BLOCKING = 3,
+};
+
+/* Node capabilities */
+#define ZYNQMP_PM_CAPABILITY_ACCESS	0x1U
+#define ZYNQMP_PM_CAPABILITY_CONTEXT	0x2U
+#define ZYNQMP_PM_CAPABILITY_WAKEUP	0x4U
+#define ZYNQMP_PM_CAPABILITY_UNUSABLE	0x8U
+
+#define ZYNQMP_PM_MAX_QOS		100U
+
 #endif /* _ZYNQMP_FIRMWARE_H_ */