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Diffstat (limited to 'target/linux/brcm2708/patches-4.4/0265-ARM-bcm2835-add-rpi-power-domain-driver.patch')
-rw-r--r--target/linux/brcm2708/patches-4.4/0265-ARM-bcm2835-add-rpi-power-domain-driver.patch361
1 files changed, 0 insertions, 361 deletions
diff --git a/target/linux/brcm2708/patches-4.4/0265-ARM-bcm2835-add-rpi-power-domain-driver.patch b/target/linux/brcm2708/patches-4.4/0265-ARM-bcm2835-add-rpi-power-domain-driver.patch
deleted file mode 100644
index 6b0c2498f5..0000000000
--- a/target/linux/brcm2708/patches-4.4/0265-ARM-bcm2835-add-rpi-power-domain-driver.patch
+++ /dev/null
@@ -1,361 +0,0 @@
-From a537e763c6c8d5516b6a66d053b10ce782db53df Mon Sep 17 00:00:00 2001
-From: Alexander Aring <alex.aring@gmail.com>
-Date: Wed, 16 Dec 2015 16:26:47 -0800
-Subject: [PATCH] ARM: bcm2835: add rpi power domain driver
-
-This patch adds support for several power domains on Raspberry Pi,
-including USB (so it can be enabled even if the bootloader didn't do
-it), and graphics.
-
-This patch is the combined work of Eric Anholt (who wrote USB support
-inside of the Raspberry Pi firmware driver, and wrote the non-USB
-domain support) and Alexander Aring (who separated the original USB
-work out from the firmware driver).
-
-Signed-off-by: Alexander Aring <alex.aring@gmail.com>
-Signed-off-by: Eric Anholt <eric@anholt.net>
-Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
-Reviewed-by: Kevin Hilman <khilman@linaro.org>
-(cherry picked from commit a09cd356586d33f64cbe64ee4f5c1a7c4a6abee5)
----
- drivers/soc/Kconfig | 1 +
- drivers/soc/Makefile | 1 +
- drivers/soc/bcm/Kconfig | 9 +
- drivers/soc/bcm/Makefile | 1 +
- drivers/soc/bcm/raspberrypi-power.c | 247 ++++++++++++++++++++++++++
- include/dt-bindings/power/raspberrypi-power.h | 41 +++++
- 6 files changed, 300 insertions(+)
- create mode 100644 drivers/soc/bcm/Kconfig
- create mode 100644 drivers/soc/bcm/Makefile
- create mode 100644 drivers/soc/bcm/raspberrypi-power.c
- create mode 100644 include/dt-bindings/power/raspberrypi-power.h
-
---- a/drivers/soc/Kconfig
-+++ b/drivers/soc/Kconfig
-@@ -1,5 +1,6 @@
- menu "SOC (System On Chip) specific Drivers"
-
-+source "drivers/soc/bcm/Kconfig"
- source "drivers/soc/brcmstb/Kconfig"
- source "drivers/soc/mediatek/Kconfig"
- source "drivers/soc/qcom/Kconfig"
---- a/drivers/soc/Makefile
-+++ b/drivers/soc/Makefile
-@@ -2,6 +2,7 @@
- # Makefile for the Linux Kernel SOC specific device drivers.
- #
-
-+obj-y += bcm/
- obj-$(CONFIG_SOC_BRCMSTB) += brcmstb/
- obj-$(CONFIG_MACH_DOVE) += dove/
- obj-$(CONFIG_ARCH_MEDIATEK) += mediatek/
---- /dev/null
-+++ b/drivers/soc/bcm/Kconfig
-@@ -0,0 +1,9 @@
-+config RASPBERRYPI_POWER
-+ bool "Raspberry Pi power domain driver"
-+ depends on ARCH_BCM2835 || COMPILE_TEST
-+ depends on RASPBERRYPI_FIRMWARE
-+ select PM_GENERIC_DOMAINS if PM
-+ select PM_GENERIC_DOMAINS_OF if PM
-+ help
-+ This enables support for the RPi power domains which can be enabled
-+ or disabled via the RPi firmware.
---- /dev/null
-+++ b/drivers/soc/bcm/Makefile
-@@ -0,0 +1 @@
-+obj-$(CONFIG_RASPBERRYPI_POWER) += raspberrypi-power.o
---- /dev/null
-+++ b/drivers/soc/bcm/raspberrypi-power.c
-@@ -0,0 +1,247 @@
-+/* (C) 2015 Pengutronix, Alexander Aring <aar@pengutronix.de>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 as
-+ * published by the Free Software Foundation.
-+ *
-+ * 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;
-+} __packet;
-+
-+/*
-+ * 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_kzalloc(dev, sizeof(*rpi_domains->xlate.domains) *
-+ RPI_POWER_DOMAIN_COUNT, 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 = rpi_firmware_get(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");
-+MODULE_LICENSE("GPL v2");
---- /dev/null
-+++ b/include/dt-bindings/power/raspberrypi-power.h
-@@ -0,0 +1,41 @@
-+/*
-+ * Copyright © 2015 Broadcom
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 as
-+ * published by the Free Software Foundation.
-+ */
-+
-+#ifndef _DT_BINDINGS_ARM_BCM2835_RPI_POWER_H
-+#define _DT_BINDINGS_ARM_BCM2835_RPI_POWER_H
-+
-+/* These power domain indices are the firmware interface's indices
-+ * minus one.
-+ */
-+#define RPI_POWER_DOMAIN_I2C0 0
-+#define RPI_POWER_DOMAIN_I2C1 1
-+#define RPI_POWER_DOMAIN_I2C2 2
-+#define RPI_POWER_DOMAIN_VIDEO_SCALER 3
-+#define RPI_POWER_DOMAIN_VPU1 4
-+#define RPI_POWER_DOMAIN_HDMI 5
-+#define RPI_POWER_DOMAIN_USB 6
-+#define RPI_POWER_DOMAIN_VEC 7
-+#define RPI_POWER_DOMAIN_JPEG 8
-+#define RPI_POWER_DOMAIN_H264 9
-+#define RPI_POWER_DOMAIN_V3D 10
-+#define RPI_POWER_DOMAIN_ISP 11
-+#define RPI_POWER_DOMAIN_UNICAM0 12
-+#define RPI_POWER_DOMAIN_UNICAM1 13
-+#define RPI_POWER_DOMAIN_CCP2RX 14
-+#define RPI_POWER_DOMAIN_CSI2 15
-+#define RPI_POWER_DOMAIN_CPI 16
-+#define RPI_POWER_DOMAIN_DSI0 17
-+#define RPI_POWER_DOMAIN_DSI1 18
-+#define RPI_POWER_DOMAIN_TRANSPOSER 19
-+#define RPI_POWER_DOMAIN_CCP2TX 20
-+#define RPI_POWER_DOMAIN_CDP 21
-+#define RPI_POWER_DOMAIN_ARM 22
-+
-+#define RPI_POWER_DOMAIN_COUNT 23
-+
-+#endif /* _DT_BINDINGS_ARM_BCM2835_RPI_POWER_H */
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