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path: root/drivers/soc/bcm/raspberrypi-power.c
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Diffstat (limited to 'drivers/soc/bcm/raspberrypi-power.c')
-rw-r--r--drivers/soc/bcm/raspberrypi-power.c245
1 files changed, 0 insertions, 245 deletions
diff --git a/drivers/soc/bcm/raspberrypi-power.c b/drivers/soc/bcm/raspberrypi-power.c
deleted file mode 100644
index 58175af982a0..000000000000
--- a/drivers/soc/bcm/raspberrypi-power.c
+++ /dev/null
@@ -1,245 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/* (C) 2015 Pengutronix, Alexander Aring <aar@pengutronix.de>
- *
- * Authors:
- * Alexander Aring <aar@pengutronix.de>
- * Eric Anholt <eric@anholt.net>
- */
-
-#include <linux/module.h>
-#include <linux/of_platform.h>
-#include <linux/platform_device.h>
-#include <linux/pm_domain.h>
-#include <dt-bindings/power/raspberrypi-power.h>
-#include <soc/bcm2835/raspberrypi-firmware.h>
-
-/*
- * Firmware indices for the old power domains interface. Only a few
- * of them were actually implemented.
- */
-#define RPI_OLD_POWER_DOMAIN_USB 3
-#define RPI_OLD_POWER_DOMAIN_V3D 10
-
-struct rpi_power_domain {
- u32 domain;
- bool enabled;
- bool old_interface;
- struct generic_pm_domain base;
- struct rpi_firmware *fw;
-};
-
-struct rpi_power_domains {
- bool has_new_interface;
- struct genpd_onecell_data xlate;
- struct rpi_firmware *fw;
- struct rpi_power_domain domains[RPI_POWER_DOMAIN_COUNT];
-};
-
-/*
- * Packet definition used by RPI_FIRMWARE_SET_POWER_STATE and
- * RPI_FIRMWARE_SET_DOMAIN_STATE
- */
-struct rpi_power_domain_packet {
- u32 domain;
- u32 on;
-};
-
-/*
- * Asks the firmware to enable or disable power on a specific power
- * domain.
- */
-static int rpi_firmware_set_power(struct rpi_power_domain *rpi_domain, bool on)
-{
- struct rpi_power_domain_packet packet;
-
- packet.domain = rpi_domain->domain;
- packet.on = on;
- return rpi_firmware_property(rpi_domain->fw,
- rpi_domain->old_interface ?
- RPI_FIRMWARE_SET_POWER_STATE :
- RPI_FIRMWARE_SET_DOMAIN_STATE,
- &packet, sizeof(packet));
-}
-
-static int rpi_domain_off(struct generic_pm_domain *domain)
-{
- struct rpi_power_domain *rpi_domain =
- container_of(domain, struct rpi_power_domain, base);
-
- return rpi_firmware_set_power(rpi_domain, false);
-}
-
-static int rpi_domain_on(struct generic_pm_domain *domain)
-{
- struct rpi_power_domain *rpi_domain =
- container_of(domain, struct rpi_power_domain, base);
-
- return rpi_firmware_set_power(rpi_domain, true);
-}
-
-static void rpi_common_init_power_domain(struct rpi_power_domains *rpi_domains,
- int xlate_index, const char *name)
-{
- struct rpi_power_domain *dom = &rpi_domains->domains[xlate_index];
-
- dom->fw = rpi_domains->fw;
-
- dom->base.name = name;
- dom->base.power_on = rpi_domain_on;
- dom->base.power_off = rpi_domain_off;
-
- /*
- * Treat all power domains as off at boot.
- *
- * The firmware itself may be keeping some domains on, but
- * from Linux's perspective all we control is the refcounts
- * that we give to the firmware, and we can't ask the firmware
- * to turn off something that we haven't ourselves turned on.
- */
- pm_genpd_init(&dom->base, NULL, true);
-
- rpi_domains->xlate.domains[xlate_index] = &dom->base;
-}
-
-static void rpi_init_power_domain(struct rpi_power_domains *rpi_domains,
- int xlate_index, const char *name)
-{
- struct rpi_power_domain *dom = &rpi_domains->domains[xlate_index];
-
- if (!rpi_domains->has_new_interface)
- return;
-
- /* The DT binding index is the firmware's domain index minus one. */
- dom->domain = xlate_index + 1;
-
- rpi_common_init_power_domain(rpi_domains, xlate_index, name);
-}
-
-static void rpi_init_old_power_domain(struct rpi_power_domains *rpi_domains,
- int xlate_index, int domain,
- const char *name)
-{
- struct rpi_power_domain *dom = &rpi_domains->domains[xlate_index];
-
- dom->old_interface = true;
- dom->domain = domain;
-
- rpi_common_init_power_domain(rpi_domains, xlate_index, name);
-}
-
-/*
- * Detects whether the firmware supports the new power domains interface.
- *
- * The firmware doesn't actually return an error on an unknown tag,
- * and just skips over it, so we do the detection by putting an
- * unexpected value in the return field and checking if it was
- * unchanged.
- */
-static bool
-rpi_has_new_domain_support(struct rpi_power_domains *rpi_domains)
-{
- struct rpi_power_domain_packet packet;
- int ret;
-
- packet.domain = RPI_POWER_DOMAIN_ARM;
- packet.on = ~0;
-
- ret = rpi_firmware_property(rpi_domains->fw,
- RPI_FIRMWARE_GET_DOMAIN_STATE,
- &packet, sizeof(packet));
-
- return ret == 0 && packet.on != ~0;
-}
-
-static int rpi_power_probe(struct platform_device *pdev)
-{
- struct device_node *fw_np;
- struct device *dev = &pdev->dev;
- struct rpi_power_domains *rpi_domains;
-
- rpi_domains = devm_kzalloc(dev, sizeof(*rpi_domains), GFP_KERNEL);
- if (!rpi_domains)
- return -ENOMEM;
-
- rpi_domains->xlate.domains =
- devm_kcalloc(dev,
- RPI_POWER_DOMAIN_COUNT,
- sizeof(*rpi_domains->xlate.domains),
- GFP_KERNEL);
- if (!rpi_domains->xlate.domains)
- return -ENOMEM;
-
- rpi_domains->xlate.num_domains = RPI_POWER_DOMAIN_COUNT;
-
- fw_np = of_parse_phandle(pdev->dev.of_node, "firmware", 0);
- if (!fw_np) {
- dev_err(&pdev->dev, "no firmware node\n");
- return -ENODEV;
- }
-
- rpi_domains->fw = devm_rpi_firmware_get(&pdev->dev, fw_np);
- of_node_put(fw_np);
- if (!rpi_domains->fw)
- return -EPROBE_DEFER;
-
- rpi_domains->has_new_interface =
- rpi_has_new_domain_support(rpi_domains);
-
- rpi_init_power_domain(rpi_domains, RPI_POWER_DOMAIN_I2C0, "I2C0");
- rpi_init_power_domain(rpi_domains, RPI_POWER_DOMAIN_I2C1, "I2C1");
- rpi_init_power_domain(rpi_domains, RPI_POWER_DOMAIN_I2C2, "I2C2");
- rpi_init_power_domain(rpi_domains, RPI_POWER_DOMAIN_VIDEO_SCALER,
- "VIDEO_SCALER");
- rpi_init_power_domain(rpi_domains, RPI_POWER_DOMAIN_VPU1, "VPU1");
- rpi_init_power_domain(rpi_domains, RPI_POWER_DOMAIN_HDMI, "HDMI");
-
- /*
- * Use the old firmware interface for USB power, so that we
- * can turn it on even if the firmware hasn't been updated.
- */
- rpi_init_old_power_domain(rpi_domains, RPI_POWER_DOMAIN_USB,
- RPI_OLD_POWER_DOMAIN_USB, "USB");
-
- rpi_init_power_domain(rpi_domains, RPI_POWER_DOMAIN_VEC, "VEC");
- rpi_init_power_domain(rpi_domains, RPI_POWER_DOMAIN_JPEG, "JPEG");
- rpi_init_power_domain(rpi_domains, RPI_POWER_DOMAIN_H264, "H264");
- rpi_init_power_domain(rpi_domains, RPI_POWER_DOMAIN_V3D, "V3D");
- rpi_init_power_domain(rpi_domains, RPI_POWER_DOMAIN_ISP, "ISP");
- rpi_init_power_domain(rpi_domains, RPI_POWER_DOMAIN_UNICAM0, "UNICAM0");
- rpi_init_power_domain(rpi_domains, RPI_POWER_DOMAIN_UNICAM1, "UNICAM1");
- rpi_init_power_domain(rpi_domains, RPI_POWER_DOMAIN_CCP2RX, "CCP2RX");
- rpi_init_power_domain(rpi_domains, RPI_POWER_DOMAIN_CSI2, "CSI2");
- rpi_init_power_domain(rpi_domains, RPI_POWER_DOMAIN_CPI, "CPI");
- rpi_init_power_domain(rpi_domains, RPI_POWER_DOMAIN_DSI0, "DSI0");
- rpi_init_power_domain(rpi_domains, RPI_POWER_DOMAIN_DSI1, "DSI1");
- rpi_init_power_domain(rpi_domains, RPI_POWER_DOMAIN_TRANSPOSER,
- "TRANSPOSER");
- rpi_init_power_domain(rpi_domains, RPI_POWER_DOMAIN_CCP2TX, "CCP2TX");
- rpi_init_power_domain(rpi_domains, RPI_POWER_DOMAIN_CDP, "CDP");
- rpi_init_power_domain(rpi_domains, RPI_POWER_DOMAIN_ARM, "ARM");
-
- of_genpd_add_provider_onecell(dev->of_node, &rpi_domains->xlate);
-
- platform_set_drvdata(pdev, rpi_domains);
-
- return 0;
-}
-
-static const struct of_device_id rpi_power_of_match[] = {
- { .compatible = "raspberrypi,bcm2835-power", },
- {},
-};
-MODULE_DEVICE_TABLE(of, rpi_power_of_match);
-
-static struct platform_driver rpi_power_driver = {
- .driver = {
- .name = "raspberrypi-power",
- .of_match_table = rpi_power_of_match,
- },
- .probe = rpi_power_probe,
-};
-builtin_platform_driver(rpi_power_driver);
-
-MODULE_AUTHOR("Alexander Aring <aar@pengutronix.de>");
-MODULE_AUTHOR("Eric Anholt <eric@anholt.net>");
-MODULE_DESCRIPTION("Raspberry Pi power domain driver");
generated by cgit v1.2.3 (git 2.39.0) at 2024-08-05 15:02:57 +0300