diff options
Diffstat (limited to 'configs/platform-rpi/patches/linux-4.4/0012-ARM-bcm2835-add-rpi-power-domain-driver.patch')
| -rw-r--r-- | configs/platform-rpi/patches/linux-4.4/0012-ARM-bcm2835-add-rpi-power-domain-driver.patch | 374 |
1 files changed, 0 insertions, 374 deletions
diff --git a/configs/platform-rpi/patches/linux-4.4/0012-ARM-bcm2835-add-rpi-power-domain-driver.patch b/configs/platform-rpi/patches/linux-4.4/0012-ARM-bcm2835-add-rpi-power-domain-driver.patch deleted file mode 100644 index e4aad60..0000000 --- a/configs/platform-rpi/patches/linux-4.4/0012-ARM-bcm2835-add-rpi-power-domain-driver.patch +++ /dev/null @@ -1,374 +0,0 @@ -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> -Signed-off-by: Alexander Aring <alex.aring@gmail.com> ---- - 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/soc/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/soc/raspberrypi-power.h - -diff --git a/drivers/soc/Kconfig b/drivers/soc/Kconfig -index 4e853ed2c82b..844142620031 100644 ---- 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" -diff --git a/drivers/soc/Makefile b/drivers/soc/Makefile -index f2ba2e932ae1..f3f955cdb04b 100644 ---- 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-$(CONFIG_ARCH_MEDIATEK) += mediatek/ -diff --git a/drivers/soc/bcm/Kconfig b/drivers/soc/bcm/Kconfig -new file mode 100644 -index 000000000000..5ba1827fe36f ---- /dev/null -+++ b/drivers/soc/bcm/Kconfig -@@ -0,0 +1,9 @@ -+config RASPBERRYPI_POWER -+ bool "Raspberry Pi power domain driver" -+ depends on ARCH_BCM2835 || COMPILE_TEST -+ depends on RASPBERRYPI_FIRMWARE -+ select PM_GENERIC_DOMAINS if PM -+ select PM_GENERIC_DOMAINS_OF if PM -+ help -+ This enables support for the RPi power domains which can be enabled -+ or disabled via the RPi firmware. -diff --git a/drivers/soc/bcm/Makefile b/drivers/soc/bcm/Makefile -new file mode 100644 -index 000000000000..63aa3eb23087 ---- /dev/null -+++ b/drivers/soc/bcm/Makefile -@@ -0,0 +1 @@ -+obj-$(CONFIG_RASPBERRYPI_POWER) += raspberrypi-power.o -diff --git a/drivers/soc/bcm/raspberrypi-power.c b/drivers/soc/bcm/raspberrypi-power.c -new file mode 100644 -index 000000000000..d5bab0696580 ---- /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/soc/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"); -diff --git a/include/dt-bindings/soc/raspberrypi-power.h b/include/dt-bindings/soc/raspberrypi-power.h -new file mode 100644 -index 000000000000..b3ff8e09a78f ---- /dev/null -+++ b/include/dt-bindings/soc/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 */ |