1 // SPDX-License-Identifier: GPL-2.0
13 #include <dt-bindings/power/raspberrypi-power.h>
14 #include <soc/bcm2835/raspberrypi-firmware.h>
17  * Firmware indices for the old power domains interface.  Only a few
24 	u32 domain;  member
43 	u32 domain;  member
48  * Asks the firmware to enable or disable power on a specific power
49  * domain.
55 	packet.domain = rpi_domain->domain;  in rpi_firmware_set_power()
57 	return rpi_firmware_property(rpi_domain->fw,  in rpi_firmware_set_power()
58 				     rpi_domain->old_interface ?  in rpi_firmware_set_power()
64 static int rpi_domain_off(struct generic_pm_domain *domain)  in rpi_domain_off()  argument
67 		container_of(domain, struct rpi_power_domain, base);  in rpi_domain_off()
72 static int rpi_domain_on(struct generic_pm_domain *domain)  in rpi_domain_on()  argument
75 		container_of(domain, struct rpi_power_domain, base);  in rpi_domain_on()
83 	struct rpi_power_domain *dom = &rpi_domains->domains[xlate_index];  in rpi_common_init_power_domain()
85 	dom->fw = rpi_domains->fw;  in rpi_common_init_power_domain()
87 	dom->base.name = name;  in rpi_common_init_power_domain()
88 	dom->base.power_on = rpi_domain_on;  in rpi_common_init_power_domain()
89 	dom->base.power_off = rpi_domain_off;  in rpi_common_init_power_domain()
92 	 * Treat all power domains as off at boot.  in rpi_common_init_power_domain()
99 	pm_genpd_init(&dom->base, NULL, true);  in rpi_common_init_power_domain()
101 	rpi_domains->xlate.domains[xlate_index] = &dom->base;  in rpi_common_init_power_domain()
107 	struct rpi_power_domain *dom = &rpi_domains->domains[xlate_index];  in rpi_init_power_domain()
109 	if (!rpi_domains->has_new_interface)  in rpi_init_power_domain()
112 	/* The DT binding index is the firmware's domain index minus one. */  in rpi_init_power_domain()
113 	dom->domain = xlate_index + 1;  in rpi_init_power_domain()
119 				      int xlate_index, int domain,  in rpi_init_old_power_domain()  argument
122 	struct rpi_power_domain *dom = &rpi_domains->domains[xlate_index];  in rpi_init_old_power_domain()
124 	dom->old_interface = true;  in rpi_init_old_power_domain()
125 	dom->domain = domain;  in rpi_init_old_power_domain()
131  * Detects whether the firmware supports the new power domains interface.
144 	packet.domain = RPI_POWER_DOMAIN_ARM;  in rpi_has_new_domain_support()
147 	ret = rpi_firmware_property(rpi_domains->fw,  in rpi_has_new_domain_support()
157 	struct device *dev = &pdev->dev;  in rpi_power_probe()
162 		return -ENOMEM;  in rpi_power_probe()
164 	rpi_domains->xlate.domains =  in rpi_power_probe()
167 			     sizeof(*rpi_domains->xlate.domains),  in rpi_power_probe()
169 	if (!rpi_domains->xlate.domains)  in rpi_power_probe()
170 		return -ENOMEM;  in rpi_power_probe()
172 	rpi_domains->xlate.num_domains = RPI_POWER_DOMAIN_COUNT;  in rpi_power_probe()
174 	fw_np = of_parse_phandle(pdev->dev.of_node, "firmware", 0);  in rpi_power_probe()
176 		dev_err(&pdev->dev, "no firmware node\n");  in rpi_power_probe()
177 		return -ENODEV;  in rpi_power_probe()
180 	rpi_domains->fw = rpi_firmware_get(fw_np);  in rpi_power_probe()
182 	if (!rpi_domains->fw)  in rpi_power_probe()
183 		return -EPROBE_DEFER;  in rpi_power_probe()
185 	rpi_domains->has_new_interface =  in rpi_power_probe()
197 	 * Use the old firmware interface for USB power, so that we  in rpi_power_probe()
221 	of_genpd_add_provider_onecell(dev->of_node, &rpi_domains->xlate);  in rpi_power_probe()
229 	{ .compatible = "raspberrypi,bcm2835-power", },
236 		.name = "raspberrypi-power",
245 MODULE_DESCRIPTION("Raspberry Pi power domain driver");