From 19226502bf6393706defe7f049c587b32c9b4f33 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?=C3=81lvaro=20Fern=C3=A1ndez=20Rojas?= Date: Wed, 31 Jul 2019 18:23:26 +0200 Subject: brcm2708: update to latest patches from the RPi foundation MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Signed-off-by: Álvaro Fernández Rojas --- ...2835-pm-Add-support-for-power-domains-und.patch | 825 --------------------- 1 file changed, 825 deletions(-) delete mode 100644 target/linux/brcm2708/patches-4.19/950-0561-soc-bcm-bcm2835-pm-Add-support-for-power-domains-und.patch (limited to 'target/linux/brcm2708/patches-4.19/950-0561-soc-bcm-bcm2835-pm-Add-support-for-power-domains-und.patch') diff --git a/target/linux/brcm2708/patches-4.19/950-0561-soc-bcm-bcm2835-pm-Add-support-for-power-domains-und.patch b/target/linux/brcm2708/patches-4.19/950-0561-soc-bcm-bcm2835-pm-Add-support-for-power-domains-und.patch deleted file mode 100644 index db6a8d0c6e..0000000000 --- a/target/linux/brcm2708/patches-4.19/950-0561-soc-bcm-bcm2835-pm-Add-support-for-power-domains-und.patch +++ /dev/null @@ -1,825 +0,0 @@ -From c3005e0dbe1f7f6d93833d5a43b12866873a312f Mon Sep 17 00:00:00 2001 -From: Eric Anholt -Date: Wed, 12 Dec 2018 15:51:48 -0800 -Subject: [PATCH 561/703] soc: bcm: bcm2835-pm: Add support for power domains - under a new binding. - -This provides a free software alternative to raspberrypi-power.c's -firmware calls to manage power domains. It also exposes a reset line, -where previously the vc4 driver had to try to force power off the -domain in order to trigger a reset. - -Signed-off-by: Eric Anholt -Acked-by: Rob Herring -Acked-by: Stefan Wahren -Signed-off-by: Stefan Wahren -(cherry picked from commit 670c672608a1ffcbc7ac0f872734843593bb8b15) ---- - drivers/mfd/bcm2835-pm.c | 36 +- - drivers/soc/bcm/Kconfig | 11 + - drivers/soc/bcm/Makefile | 1 + - drivers/soc/bcm/bcm2835-power.c | 661 +++++++++++++++++++++++++++ - include/dt-bindings/soc/bcm2835-pm.h | 28 ++ - include/linux/mfd/bcm2835-pm.h | 1 + - 6 files changed, 734 insertions(+), 4 deletions(-) - create mode 100644 drivers/soc/bcm/bcm2835-power.c - create mode 100644 include/dt-bindings/soc/bcm2835-pm.h - ---- a/drivers/mfd/bcm2835-pm.c -+++ b/drivers/mfd/bcm2835-pm.c -@@ -3,7 +3,7 @@ - * PM MFD driver for Broadcom BCM2835 - * - * This driver binds to the PM block and creates the MFD device for -- * the WDT driver. -+ * the WDT and power drivers. - */ - - #include -@@ -21,11 +21,16 @@ static const struct mfd_cell bcm2835_pm_ - { .name = "bcm2835-wdt" }, - }; - -+static const struct mfd_cell bcm2835_power_devs[] = { -+ { .name = "bcm2835-power" }, -+}; -+ - static int bcm2835_pm_probe(struct platform_device *pdev) - { - struct resource *res; - struct device *dev = &pdev->dev; - struct bcm2835_pm *pm; -+ int ret; - - pm = devm_kzalloc(dev, sizeof(*pm), GFP_KERNEL); - if (!pm) -@@ -39,13 +44,36 @@ static int bcm2835_pm_probe(struct platf - if (IS_ERR(pm->base)) - return PTR_ERR(pm->base); - -- return devm_mfd_add_devices(dev, -1, -- bcm2835_pm_devs, ARRAY_SIZE(bcm2835_pm_devs), -- NULL, 0, NULL); -+ ret = devm_mfd_add_devices(dev, -1, -+ bcm2835_pm_devs, ARRAY_SIZE(bcm2835_pm_devs), -+ NULL, 0, NULL); -+ if (ret) -+ return ret; -+ -+ /* We'll use the presence of the AXI ASB regs in the -+ * bcm2835-pm binding as the key for whether we can reference -+ * the full PM register range and support power domains. -+ */ -+ res = platform_get_resource(pdev, IORESOURCE_MEM, 1); -+ if (res) { -+ pm->asb = devm_ioremap_resource(dev, res); -+ if (IS_ERR(pm->asb)) -+ return PTR_ERR(pm->asb); -+ -+ ret = devm_mfd_add_devices(dev, -1, -+ bcm2835_power_devs, -+ ARRAY_SIZE(bcm2835_power_devs), -+ NULL, 0, NULL); -+ if (ret) -+ return ret; -+ } -+ -+ return 0; - } - - static const struct of_device_id bcm2835_pm_of_match[] = { - { .compatible = "brcm,bcm2835-pm-wdt", }, -+ { .compatible = "brcm,bcm2835-pm", }, - {}, - }; - MODULE_DEVICE_TABLE(of, bcm2835_pm_of_match); ---- a/drivers/soc/bcm/Kconfig -+++ b/drivers/soc/bcm/Kconfig -@@ -1,5 +1,16 @@ - menu "Broadcom SoC drivers" - -+config BCM2835_POWER -+ bool "BCM2835 power domain driver" -+ depends on ARCH_BCM2835 || (COMPILE_TEST && OF) -+ select PM_GENERIC_DOMAINS if PM -+ select RESET_CONTROLLER -+ help -+ This enables support for the BCM2835 power domains and reset -+ controller. Any usage of power domains by the Raspberry Pi -+ firmware means that Linux usage of the same power domain -+ must be accessed using the RASPBERRYPI_POWER driver -+ - config RASPBERRYPI_POWER - bool "Raspberry Pi power domain driver" - depends on ARCH_BCM2835 || (COMPILE_TEST && OF) ---- a/drivers/soc/bcm/Makefile -+++ b/drivers/soc/bcm/Makefile -@@ -1,2 +1,3 @@ -+obj-$(CONFIG_BCM2835_POWER) += bcm2835-power.o - obj-$(CONFIG_RASPBERRYPI_POWER) += raspberrypi-power.o - obj-$(CONFIG_SOC_BRCMSTB) += brcmstb/ ---- /dev/null -+++ b/drivers/soc/bcm/bcm2835-power.c -@@ -0,0 +1,661 @@ -+// SPDX-License-Identifier: GPL-2.0+ -+/* -+ * Power domain driver for Broadcom BCM2835 -+ * -+ * Copyright (C) 2018 Broadcom -+ */ -+ -+#include -+#include -+#include -+#include -+#include -+#include -+#include -+#include -+#include -+#include -+ -+#define PM_GNRIC 0x00 -+#define PM_AUDIO 0x04 -+#define PM_STATUS 0x18 -+#define PM_RSTC 0x1c -+#define PM_RSTS 0x20 -+#define PM_WDOG 0x24 -+#define PM_PADS0 0x28 -+#define PM_PADS2 0x2c -+#define PM_PADS3 0x30 -+#define PM_PADS4 0x34 -+#define PM_PADS5 0x38 -+#define PM_PADS6 0x3c -+#define PM_CAM0 0x44 -+#define PM_CAM0_LDOHPEN BIT(2) -+#define PM_CAM0_LDOLPEN BIT(1) -+#define PM_CAM0_CTRLEN BIT(0) -+ -+#define PM_CAM1 0x48 -+#define PM_CAM1_LDOHPEN BIT(2) -+#define PM_CAM1_LDOLPEN BIT(1) -+#define PM_CAM1_CTRLEN BIT(0) -+ -+#define PM_CCP2TX 0x4c -+#define PM_CCP2TX_LDOEN BIT(1) -+#define PM_CCP2TX_CTRLEN BIT(0) -+ -+#define PM_DSI0 0x50 -+#define PM_DSI0_LDOHPEN BIT(2) -+#define PM_DSI0_LDOLPEN BIT(1) -+#define PM_DSI0_CTRLEN BIT(0) -+ -+#define PM_DSI1 0x54 -+#define PM_DSI1_LDOHPEN BIT(2) -+#define PM_DSI1_LDOLPEN BIT(1) -+#define PM_DSI1_CTRLEN BIT(0) -+ -+#define PM_HDMI 0x58 -+#define PM_HDMI_RSTDR BIT(19) -+#define PM_HDMI_LDOPD BIT(1) -+#define PM_HDMI_CTRLEN BIT(0) -+ -+#define PM_USB 0x5c -+/* The power gates must be enabled with this bit before enabling the LDO in the -+ * USB block. -+ */ -+#define PM_USB_CTRLEN BIT(0) -+ -+#define PM_PXLDO 0x60 -+#define PM_PXBG 0x64 -+#define PM_DFT 0x68 -+#define PM_SMPS 0x6c -+#define PM_XOSC 0x70 -+#define PM_SPAREW 0x74 -+#define PM_SPARER 0x78 -+#define PM_AVS_RSTDR 0x7c -+#define PM_AVS_STAT 0x80 -+#define PM_AVS_EVENT 0x84 -+#define PM_AVS_INTEN 0x88 -+#define PM_DUMMY 0xfc -+ -+#define PM_IMAGE 0x108 -+#define PM_GRAFX 0x10c -+#define PM_PROC 0x110 -+#define PM_ENAB BIT(12) -+#define PM_ISPRSTN BIT(8) -+#define PM_H264RSTN BIT(7) -+#define PM_PERIRSTN BIT(6) -+#define PM_V3DRSTN BIT(6) -+#define PM_ISFUNC BIT(5) -+#define PM_MRDONE BIT(4) -+#define PM_MEMREP BIT(3) -+#define PM_ISPOW BIT(2) -+#define PM_POWOK BIT(1) -+#define PM_POWUP BIT(0) -+#define PM_INRUSH_SHIFT 13 -+#define PM_INRUSH_3_5_MA 0 -+#define PM_INRUSH_5_MA 1 -+#define PM_INRUSH_10_MA 2 -+#define PM_INRUSH_20_MA 3 -+#define PM_INRUSH_MASK (3 << PM_INRUSH_SHIFT) -+ -+#define PM_PASSWORD 0x5a000000 -+ -+#define PM_WDOG_TIME_SET 0x000fffff -+#define PM_RSTC_WRCFG_CLR 0xffffffcf -+#define PM_RSTS_HADWRH_SET 0x00000040 -+#define PM_RSTC_WRCFG_SET 0x00000030 -+#define PM_RSTC_WRCFG_FULL_RESET 0x00000020 -+#define PM_RSTC_RESET 0x00000102 -+ -+#define PM_READ(reg) readl(power->base + (reg)) -+#define PM_WRITE(reg, val) writel(PM_PASSWORD | (val), power->base + (reg)) -+ -+#define ASB_BRDG_VERSION 0x00 -+#define ASB_CPR_CTRL 0x04 -+ -+#define ASB_V3D_S_CTRL 0x08 -+#define ASB_V3D_M_CTRL 0x0c -+#define ASB_ISP_S_CTRL 0x10 -+#define ASB_ISP_M_CTRL 0x14 -+#define ASB_H264_S_CTRL 0x18 -+#define ASB_H264_M_CTRL 0x1c -+ -+#define ASB_REQ_STOP BIT(0) -+#define ASB_ACK BIT(1) -+#define ASB_EMPTY BIT(2) -+#define ASB_FULL BIT(3) -+ -+#define ASB_AXI_BRDG_ID 0x20 -+ -+#define ASB_READ(reg) readl(power->asb + (reg)) -+#define ASB_WRITE(reg, val) writel(PM_PASSWORD | (val), power->asb + (reg)) -+ -+struct bcm2835_power_domain { -+ struct generic_pm_domain base; -+ struct bcm2835_power *power; -+ u32 domain; -+ struct clk *clk; -+}; -+ -+struct bcm2835_power { -+ struct device *dev; -+ /* PM registers. */ -+ void __iomem *base; -+ /* AXI Async bridge registers. */ -+ void __iomem *asb; -+ -+ struct genpd_onecell_data pd_xlate; -+ struct bcm2835_power_domain domains[BCM2835_POWER_DOMAIN_COUNT]; -+ struct reset_controller_dev reset; -+}; -+ -+static int bcm2835_asb_enable(struct bcm2835_power *power, u32 reg) -+{ -+ u64 start = ktime_get_ns(); -+ -+ /* Enable the module's async AXI bridges. */ -+ ASB_WRITE(reg, ASB_READ(reg) & ~ASB_REQ_STOP); -+ while (ASB_READ(reg) & ASB_ACK) { -+ cpu_relax(); -+ if (ktime_get_ns() - start >= 1000) -+ return -ETIMEDOUT; -+ } -+ -+ return 0; -+} -+ -+static int bcm2835_asb_disable(struct bcm2835_power *power, u32 reg) -+{ -+ u64 start = ktime_get_ns(); -+ -+ /* Enable the module's async AXI bridges. */ -+ ASB_WRITE(reg, ASB_READ(reg) | ASB_REQ_STOP); -+ while (!(ASB_READ(reg) & ASB_ACK)) { -+ cpu_relax(); -+ if (ktime_get_ns() - start >= 1000) -+ return -ETIMEDOUT; -+ } -+ -+ return 0; -+} -+ -+static int bcm2835_power_power_off(struct bcm2835_power_domain *pd, u32 pm_reg) -+{ -+ struct bcm2835_power *power = pd->power; -+ -+ /* Enable functional isolation */ -+ PM_WRITE(pm_reg, PM_READ(pm_reg) & ~PM_ISFUNC); -+ -+ /* Enable electrical isolation */ -+ PM_WRITE(pm_reg, PM_READ(pm_reg) & ~PM_ISPOW); -+ -+ /* Open the power switches. */ -+ PM_WRITE(pm_reg, PM_READ(pm_reg) & ~PM_POWUP); -+ -+ return 0; -+} -+ -+static int bcm2835_power_power_on(struct bcm2835_power_domain *pd, u32 pm_reg) -+{ -+ struct bcm2835_power *power = pd->power; -+ struct device *dev = power->dev; -+ u64 start; -+ int ret; -+ int inrush; -+ bool powok; -+ -+ /* If it was already powered on by the fw, leave it that way. */ -+ if (PM_READ(pm_reg) & PM_POWUP) -+ return 0; -+ -+ /* Enable power. Allowing too much current at once may result -+ * in POWOK never getting set, so start low and ramp it up as -+ * necessary to succeed. -+ */ -+ powok = false; -+ for (inrush = PM_INRUSH_3_5_MA; inrush <= PM_INRUSH_20_MA; inrush++) { -+ PM_WRITE(pm_reg, -+ (PM_READ(pm_reg) & ~PM_INRUSH_MASK) | -+ (inrush << PM_INRUSH_SHIFT) | -+ PM_POWUP); -+ -+ start = ktime_get_ns(); -+ while (!(powok = !!(PM_READ(pm_reg) & PM_POWOK))) { -+ cpu_relax(); -+ if (ktime_get_ns() - start >= 3000) -+ break; -+ } -+ } -+ if (!powok) { -+ dev_err(dev, "Timeout waiting for %s power OK\n", -+ pd->base.name); -+ ret = -ETIMEDOUT; -+ goto err_disable_powup; -+ } -+ -+ /* Disable electrical isolation */ -+ PM_WRITE(pm_reg, PM_READ(pm_reg) | PM_ISPOW); -+ -+ /* Repair memory */ -+ PM_WRITE(pm_reg, PM_READ(pm_reg) | PM_MEMREP); -+ start = ktime_get_ns(); -+ while (!(PM_READ(pm_reg) & PM_MRDONE)) { -+ cpu_relax(); -+ if (ktime_get_ns() - start >= 1000) { -+ dev_err(dev, "Timeout waiting for %s memory repair\n", -+ pd->base.name); -+ ret = -ETIMEDOUT; -+ goto err_disable_ispow; -+ } -+ } -+ -+ /* Disable functional isolation */ -+ PM_WRITE(pm_reg, PM_READ(pm_reg) | PM_ISFUNC); -+ -+ return 0; -+ -+err_disable_ispow: -+ PM_WRITE(pm_reg, PM_READ(pm_reg) & ~PM_ISPOW); -+err_disable_powup: -+ PM_WRITE(pm_reg, PM_READ(pm_reg) & ~(PM_POWUP | PM_INRUSH_MASK)); -+ return ret; -+} -+ -+static int bcm2835_asb_power_on(struct bcm2835_power_domain *pd, -+ u32 pm_reg, -+ u32 asb_m_reg, -+ u32 asb_s_reg, -+ u32 reset_flags) -+{ -+ struct bcm2835_power *power = pd->power; -+ int ret; -+ -+ ret = clk_prepare_enable(pd->clk); -+ if (ret) { -+ dev_err(power->dev, "Failed to enable clock for %s\n", -+ pd->base.name); -+ return ret; -+ } -+ -+ /* Wait 32 clocks for reset to propagate, 1 us will be enough */ -+ udelay(1); -+ -+ clk_disable_unprepare(pd->clk); -+ -+ /* Deassert the resets. */ -+ PM_WRITE(pm_reg, PM_READ(pm_reg) | reset_flags); -+ -+ ret = clk_prepare_enable(pd->clk); -+ if (ret) { -+ dev_err(power->dev, "Failed to enable clock for %s\n", -+ pd->base.name); -+ goto err_enable_resets; -+ } -+ -+ ret = bcm2835_asb_enable(power, asb_m_reg); -+ if (ret) { -+ dev_err(power->dev, "Failed to enable ASB master for %s\n", -+ pd->base.name); -+ goto err_disable_clk; -+ } -+ ret = bcm2835_asb_enable(power, asb_s_reg); -+ if (ret) { -+ dev_err(power->dev, "Failed to enable ASB slave for %s\n", -+ pd->base.name); -+ goto err_disable_asb_master; -+ } -+ -+ return 0; -+ -+err_disable_asb_master: -+ bcm2835_asb_disable(power, asb_m_reg); -+err_disable_clk: -+ clk_disable_unprepare(pd->clk); -+err_enable_resets: -+ PM_WRITE(pm_reg, PM_READ(pm_reg) & ~reset_flags); -+ return ret; -+} -+ -+static int bcm2835_asb_power_off(struct bcm2835_power_domain *pd, -+ u32 pm_reg, -+ u32 asb_m_reg, -+ u32 asb_s_reg, -+ u32 reset_flags) -+{ -+ struct bcm2835_power *power = pd->power; -+ int ret; -+ -+ ret = bcm2835_asb_disable(power, asb_s_reg); -+ if (ret) { -+ dev_warn(power->dev, "Failed to disable ASB slave for %s\n", -+ pd->base.name); -+ return ret; -+ } -+ ret = bcm2835_asb_disable(power, asb_m_reg); -+ if (ret) { -+ dev_warn(power->dev, "Failed to disable ASB master for %s\n", -+ pd->base.name); -+ bcm2835_asb_enable(power, asb_s_reg); -+ return ret; -+ } -+ -+ clk_disable_unprepare(pd->clk); -+ -+ /* Assert the resets. */ -+ PM_WRITE(pm_reg, PM_READ(pm_reg) & ~reset_flags); -+ -+ return 0; -+} -+ -+static int bcm2835_power_pd_power_on(struct generic_pm_domain *domain) -+{ -+ struct bcm2835_power_domain *pd = -+ container_of(domain, struct bcm2835_power_domain, base); -+ struct bcm2835_power *power = pd->power; -+ -+ switch (pd->domain) { -+ case BCM2835_POWER_DOMAIN_GRAFX: -+ return bcm2835_power_power_on(pd, PM_GRAFX); -+ -+ case BCM2835_POWER_DOMAIN_GRAFX_V3D: -+ return bcm2835_asb_power_on(pd, PM_GRAFX, -+ ASB_V3D_M_CTRL, ASB_V3D_S_CTRL, -+ PM_V3DRSTN); -+ -+ case BCM2835_POWER_DOMAIN_IMAGE: -+ return bcm2835_power_power_on(pd, PM_IMAGE); -+ -+ case BCM2835_POWER_DOMAIN_IMAGE_PERI: -+ return bcm2835_asb_power_on(pd, PM_IMAGE, -+ 0, 0, -+ PM_PERIRSTN); -+ -+ case BCM2835_POWER_DOMAIN_IMAGE_ISP: -+ return bcm2835_asb_power_on(pd, PM_IMAGE, -+ ASB_ISP_M_CTRL, ASB_ISP_S_CTRL, -+ PM_ISPRSTN); -+ -+ case BCM2835_POWER_DOMAIN_IMAGE_H264: -+ return bcm2835_asb_power_on(pd, PM_IMAGE, -+ ASB_H264_M_CTRL, ASB_H264_S_CTRL, -+ PM_H264RSTN); -+ -+ case BCM2835_POWER_DOMAIN_USB: -+ PM_WRITE(PM_USB, PM_USB_CTRLEN); -+ return 0; -+ -+ case BCM2835_POWER_DOMAIN_DSI0: -+ PM_WRITE(PM_DSI0, PM_DSI0_CTRLEN); -+ PM_WRITE(PM_DSI0, PM_DSI0_CTRLEN | PM_DSI0_LDOHPEN); -+ return 0; -+ -+ case BCM2835_POWER_DOMAIN_DSI1: -+ PM_WRITE(PM_DSI1, PM_DSI1_CTRLEN); -+ PM_WRITE(PM_DSI1, PM_DSI1_CTRLEN | PM_DSI1_LDOHPEN); -+ return 0; -+ -+ case BCM2835_POWER_DOMAIN_CCP2TX: -+ PM_WRITE(PM_CCP2TX, PM_CCP2TX_CTRLEN); -+ PM_WRITE(PM_CCP2TX, PM_CCP2TX_CTRLEN | PM_CCP2TX_LDOEN); -+ return 0; -+ -+ case BCM2835_POWER_DOMAIN_HDMI: -+ PM_WRITE(PM_HDMI, PM_READ(PM_HDMI) | PM_HDMI_RSTDR); -+ PM_WRITE(PM_HDMI, PM_READ(PM_HDMI) | PM_HDMI_CTRLEN); -+ PM_WRITE(PM_HDMI, PM_READ(PM_HDMI) & ~PM_HDMI_LDOPD); -+ usleep_range(100, 200); -+ PM_WRITE(PM_HDMI, PM_READ(PM_HDMI) & ~PM_HDMI_RSTDR); -+ return 0; -+ -+ default: -+ dev_err(power->dev, "Invalid domain %d\n", pd->domain); -+ return -EINVAL; -+ } -+} -+ -+static int bcm2835_power_pd_power_off(struct generic_pm_domain *domain) -+{ -+ struct bcm2835_power_domain *pd = -+ container_of(domain, struct bcm2835_power_domain, base); -+ struct bcm2835_power *power = pd->power; -+ -+ switch (pd->domain) { -+ case BCM2835_POWER_DOMAIN_GRAFX: -+ return bcm2835_power_power_off(pd, PM_GRAFX); -+ -+ case BCM2835_POWER_DOMAIN_GRAFX_V3D: -+ return bcm2835_asb_power_off(pd, PM_GRAFX, -+ ASB_V3D_M_CTRL, ASB_V3D_S_CTRL, -+ PM_V3DRSTN); -+ -+ case BCM2835_POWER_DOMAIN_IMAGE: -+ return bcm2835_power_power_off(pd, PM_IMAGE); -+ -+ case BCM2835_POWER_DOMAIN_IMAGE_PERI: -+ return bcm2835_asb_power_off(pd, PM_IMAGE, -+ 0, 0, -+ PM_PERIRSTN); -+ -+ case BCM2835_POWER_DOMAIN_IMAGE_ISP: -+ return bcm2835_asb_power_off(pd, PM_IMAGE, -+ ASB_ISP_M_CTRL, ASB_ISP_S_CTRL, -+ PM_ISPRSTN); -+ -+ case BCM2835_POWER_DOMAIN_IMAGE_H264: -+ return bcm2835_asb_power_off(pd, PM_IMAGE, -+ ASB_H264_M_CTRL, ASB_H264_S_CTRL, -+ PM_H264RSTN); -+ -+ case BCM2835_POWER_DOMAIN_USB: -+ PM_WRITE(PM_USB, 0); -+ return 0; -+ -+ case BCM2835_POWER_DOMAIN_DSI0: -+ PM_WRITE(PM_DSI0, PM_DSI0_CTRLEN); -+ PM_WRITE(PM_DSI0, 0); -+ return 0; -+ -+ case BCM2835_POWER_DOMAIN_DSI1: -+ PM_WRITE(PM_DSI1, PM_DSI1_CTRLEN); -+ PM_WRITE(PM_DSI1, 0); -+ return 0; -+ -+ case BCM2835_POWER_DOMAIN_CCP2TX: -+ PM_WRITE(PM_CCP2TX, PM_CCP2TX_CTRLEN); -+ PM_WRITE(PM_CCP2TX, 0); -+ return 0; -+ -+ case BCM2835_POWER_DOMAIN_HDMI: -+ PM_WRITE(PM_HDMI, PM_READ(PM_HDMI) | PM_HDMI_LDOPD); -+ PM_WRITE(PM_HDMI, PM_READ(PM_HDMI) & ~PM_HDMI_CTRLEN); -+ return 0; -+ -+ default: -+ dev_err(power->dev, "Invalid domain %d\n", pd->domain); -+ return -EINVAL; -+ } -+} -+ -+static void -+bcm2835_init_power_domain(struct bcm2835_power *power, -+ int pd_xlate_index, const char *name) -+{ -+ struct device *dev = power->dev; -+ struct bcm2835_power_domain *dom = &power->domains[pd_xlate_index]; -+ -+ dom->clk = devm_clk_get(dev->parent, name); -+ -+ dom->base.name = name; -+ dom->base.power_on = bcm2835_power_pd_power_on; -+ dom->base.power_off = bcm2835_power_pd_power_off; -+ -+ dom->domain = pd_xlate_index; -+ dom->power = power; -+ -+ /* XXX: on/off at boot? */ -+ pm_genpd_init(&dom->base, NULL, true); -+ -+ power->pd_xlate.domains[pd_xlate_index] = &dom->base; -+} -+ -+/** bcm2835_reset_reset - Resets a block that has a reset line in the -+ * PM block. -+ * -+ * The consumer of the reset controller must have the power domain up -+ * -- there's no reset ability with the power domain down. To reset -+ * the sub-block, we just disable its access to memory through the -+ * ASB, reset, and re-enable. -+ */ -+static int bcm2835_reset_reset(struct reset_controller_dev *rcdev, -+ unsigned long id) -+{ -+ struct bcm2835_power *power = container_of(rcdev, struct bcm2835_power, -+ reset); -+ struct bcm2835_power_domain *pd; -+ int ret; -+ -+ switch (id) { -+ case BCM2835_RESET_V3D: -+ pd = &power->domains[BCM2835_POWER_DOMAIN_GRAFX_V3D]; -+ break; -+ case BCM2835_RESET_H264: -+ pd = &power->domains[BCM2835_POWER_DOMAIN_IMAGE_H264]; -+ break; -+ case BCM2835_RESET_ISP: -+ pd = &power->domains[BCM2835_POWER_DOMAIN_IMAGE_ISP]; -+ break; -+ default: -+ dev_err(power->dev, "Bad reset id %ld\n", id); -+ return -EINVAL; -+ } -+ -+ ret = bcm2835_power_pd_power_off(&pd->base); -+ if (ret) -+ return ret; -+ -+ return bcm2835_power_pd_power_on(&pd->base); -+} -+ -+static int bcm2835_reset_status(struct reset_controller_dev *rcdev, -+ unsigned long id) -+{ -+ struct bcm2835_power *power = container_of(rcdev, struct bcm2835_power, -+ reset); -+ -+ switch (id) { -+ case BCM2835_RESET_V3D: -+ return !PM_READ(PM_GRAFX & PM_V3DRSTN); -+ case BCM2835_RESET_H264: -+ return !PM_READ(PM_IMAGE & PM_H264RSTN); -+ case BCM2835_RESET_ISP: -+ return !PM_READ(PM_IMAGE & PM_ISPRSTN); -+ default: -+ return -EINVAL; -+ } -+} -+ -+const struct reset_control_ops bcm2835_reset_ops = { -+ .reset = bcm2835_reset_reset, -+ .status = bcm2835_reset_status, -+}; -+ -+static const char *const power_domain_names[] = { -+ [BCM2835_POWER_DOMAIN_GRAFX] = "grafx", -+ [BCM2835_POWER_DOMAIN_GRAFX_V3D] = "v3d", -+ -+ [BCM2835_POWER_DOMAIN_IMAGE] = "image", -+ [BCM2835_POWER_DOMAIN_IMAGE_PERI] = "peri_image", -+ [BCM2835_POWER_DOMAIN_IMAGE_H264] = "h264", -+ [BCM2835_POWER_DOMAIN_IMAGE_ISP] = "isp", -+ -+ [BCM2835_POWER_DOMAIN_USB] = "usb", -+ [BCM2835_POWER_DOMAIN_DSI0] = "dsi0", -+ [BCM2835_POWER_DOMAIN_DSI1] = "dsi1", -+ [BCM2835_POWER_DOMAIN_CAM0] = "cam0", -+ [BCM2835_POWER_DOMAIN_CAM1] = "cam1", -+ [BCM2835_POWER_DOMAIN_CCP2TX] = "ccp2tx", -+ [BCM2835_POWER_DOMAIN_HDMI] = "hdmi", -+}; -+ -+static int bcm2835_power_probe(struct platform_device *pdev) -+{ -+ struct bcm2835_pm *pm = dev_get_drvdata(pdev->dev.parent); -+ struct device *dev = &pdev->dev; -+ struct bcm2835_power *power; -+ static const struct { -+ int parent, child; -+ } domain_deps[] = { -+ { BCM2835_POWER_DOMAIN_GRAFX, BCM2835_POWER_DOMAIN_GRAFX_V3D }, -+ { BCM2835_POWER_DOMAIN_IMAGE, BCM2835_POWER_DOMAIN_IMAGE_PERI }, -+ { BCM2835_POWER_DOMAIN_IMAGE, BCM2835_POWER_DOMAIN_IMAGE_H264 }, -+ { BCM2835_POWER_DOMAIN_IMAGE, BCM2835_POWER_DOMAIN_IMAGE_ISP }, -+ { BCM2835_POWER_DOMAIN_IMAGE_PERI, BCM2835_POWER_DOMAIN_USB }, -+ { BCM2835_POWER_DOMAIN_IMAGE_PERI, BCM2835_POWER_DOMAIN_CAM0 }, -+ { BCM2835_POWER_DOMAIN_IMAGE_PERI, BCM2835_POWER_DOMAIN_CAM1 }, -+ }; -+ int ret, i; -+ u32 id; -+ -+ power = devm_kzalloc(dev, sizeof(*power), GFP_KERNEL); -+ if (!power) -+ return -ENOMEM; -+ platform_set_drvdata(pdev, power); -+ -+ power->dev = dev; -+ power->base = pm->base; -+ power->asb = pm->asb; -+ -+ id = ASB_READ(ASB_AXI_BRDG_ID); -+ if (id != 0x62726467 /* "BRDG" */) { -+ dev_err(dev, "ASB register ID returned 0x%08x\n", id); -+ return -ENODEV; -+ } -+ -+ power->pd_xlate.domains = devm_kcalloc(dev, -+ ARRAY_SIZE(power_domain_names), -+ sizeof(*power->pd_xlate.domains), -+ GFP_KERNEL); -+ if (!power->pd_xlate.domains) -+ return -ENOMEM; -+ -+ power->pd_xlate.num_domains = ARRAY_SIZE(power_domain_names); -+ -+ for (i = 0; i < ARRAY_SIZE(power_domain_names); i++) -+ bcm2835_init_power_domain(power, i, power_domain_names[i]); -+ -+ for (i = 0; i < ARRAY_SIZE(domain_deps); i++) { -+ pm_genpd_add_subdomain(&power->domains[domain_deps[i].parent].base, -+ &power->domains[domain_deps[i].child].base); -+ } -+ -+ power->reset.owner = THIS_MODULE; -+ power->reset.nr_resets = BCM2835_RESET_COUNT; -+ power->reset.ops = &bcm2835_reset_ops; -+ power->reset.of_node = dev->parent->of_node; -+ -+ ret = devm_reset_controller_register(dev, &power->reset); -+ if (ret) -+ return ret; -+ -+ of_genpd_add_provider_onecell(dev->parent->of_node, &power->pd_xlate); -+ -+ dev_info(dev, "Broadcom BCM2835 power domains driver"); -+ return 0; -+} -+ -+static int bcm2835_power_remove(struct platform_device *pdev) -+{ -+ return 0; -+} -+ -+static struct platform_driver bcm2835_power_driver = { -+ .probe = bcm2835_power_probe, -+ .remove = bcm2835_power_remove, -+ .driver = { -+ .name = "bcm2835-power", -+ }, -+}; -+module_platform_driver(bcm2835_power_driver); -+ -+MODULE_AUTHOR("Eric Anholt "); -+MODULE_DESCRIPTION("Driver for Broadcom BCM2835 PM power domains and reset"); -+MODULE_LICENSE("GPL"); ---- /dev/null -+++ b/include/dt-bindings/soc/bcm2835-pm.h -@@ -0,0 +1,28 @@ -+/* SPDX-License-Identifier: (GPL-2.0+ OR MIT) */ -+ -+#ifndef _DT_BINDINGS_ARM_BCM2835_PM_H -+#define _DT_BINDINGS_ARM_BCM2835_PM_H -+ -+#define BCM2835_POWER_DOMAIN_GRAFX 0 -+#define BCM2835_POWER_DOMAIN_GRAFX_V3D 1 -+#define BCM2835_POWER_DOMAIN_IMAGE 2 -+#define BCM2835_POWER_DOMAIN_IMAGE_PERI 3 -+#define BCM2835_POWER_DOMAIN_IMAGE_ISP 4 -+#define BCM2835_POWER_DOMAIN_IMAGE_H264 5 -+#define BCM2835_POWER_DOMAIN_USB 6 -+#define BCM2835_POWER_DOMAIN_DSI0 7 -+#define BCM2835_POWER_DOMAIN_DSI1 8 -+#define BCM2835_POWER_DOMAIN_CAM0 9 -+#define BCM2835_POWER_DOMAIN_CAM1 10 -+#define BCM2835_POWER_DOMAIN_CCP2TX 11 -+#define BCM2835_POWER_DOMAIN_HDMI 12 -+ -+#define BCM2835_POWER_DOMAIN_COUNT 13 -+ -+#define BCM2835_RESET_V3D 0 -+#define BCM2835_RESET_ISP 1 -+#define BCM2835_RESET_H264 2 -+ -+#define BCM2835_RESET_COUNT 3 -+ -+#endif /* _DT_BINDINGS_ARM_BCM2835_PM_H */ ---- a/include/linux/mfd/bcm2835-pm.h -+++ b/include/linux/mfd/bcm2835-pm.h -@@ -8,6 +8,7 @@ - struct bcm2835_pm { - struct device *dev; - void __iomem *base; -+ void __iomem *asb; - }; - - #endif /* BCM2835_MFD_PM_H */ -- cgit v1.2.3