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path: root/drivers/soc/bcm/bcm2835-power.c
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Diffstat (limited to 'drivers/soc/bcm/bcm2835-power.c')
-rw-r--r--drivers/soc/bcm/bcm2835-power.c713
1 files changed, 0 insertions, 713 deletions
diff --git a/drivers/soc/bcm/bcm2835-power.c b/drivers/soc/bcm/bcm2835-power.c
deleted file mode 100644
index 1a179d4e011c..000000000000
--- a/drivers/soc/bcm/bcm2835-power.c
+++ /dev/null
@@ -1,713 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0+
-/*
- * Power domain driver for Broadcom BCM2835
- *
- * Copyright (C) 2018 Broadcom
- */
-
-#include <dt-bindings/soc/bcm2835-pm.h>
-#include <linux/clk.h>
-#include <linux/delay.h>
-#include <linux/io.h>
-#include <linux/mfd/bcm2835-pm.h>
-#include <linux/module.h>
-#include <linux/platform_device.h>
-#include <linux/pm_domain.h>
-#include <linux/reset-controller.h>
-#include <linux/types.h>
-
-#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 BCM2835_BRDG_ID 0x62726467
-
-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;
- /* RPiVid bridge registers. */
- void __iomem *rpivid_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_control(struct bcm2835_power *power, u32 reg, bool enable)
-{
- void __iomem *base = power->asb;
- u64 start;
- u32 val;
-
- switch (reg) {
- case 0:
- return 0;
- case ASB_V3D_S_CTRL:
- case ASB_V3D_M_CTRL:
- if (power->rpivid_asb)
- base = power->rpivid_asb;
- break;
- }
-
- start = ktime_get_ns();
-
- /* Enable the module's async AXI bridges. */
- if (enable) {
- val = readl(base + reg) & ~ASB_REQ_STOP;
- } else {
- val = readl(base + reg) | ASB_REQ_STOP;
- }
- writel(PM_PASSWORD | val, base + reg);
-
- while (readl(base + reg) & ASB_ACK) {
- cpu_relax();
- if (ktime_get_ns() - start >= 1000)
- return -ETIMEDOUT;
- }
-
- return 0;
-}
-
-static int bcm2835_asb_enable(struct bcm2835_power *power, u32 reg)
-{
- return bcm2835_asb_control(power, reg, true);
-}
-
-static int bcm2835_asb_disable(struct bcm2835_power *power, u32 reg)
-{
- return bcm2835_asb_control(power, reg, false);
-}
-
-static int bcm2835_power_power_off(struct bcm2835_power_domain *pd, u32 pm_reg)
-{
- struct bcm2835_power *power = pd->power;
-
- /* We don't run this on BCM2711 */
- if (power->rpivid_asb)
- return 0;
-
- /* 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;
-
- /* We don't run this on BCM2711 */
- if (power->rpivid_asb)
- return 0;
-
- /* 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 int
-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);
- if (IS_ERR(dom->clk)) {
- int ret = PTR_ERR(dom->clk);
-
- if (ret == -EPROBE_DEFER)
- return ret;
-
- /* Some domains don't have a clk, so make sure that we
- * don't deref an error pointer later.
- */
- dom->clk = NULL;
- }
-
- 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;
-
- return 0;
-}
-
-/** 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;
- }
-}
-
-static 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 = 0, 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;
- power->rpivid_asb = pm->rpivid_asb;
-
- id = readl(power->asb + ASB_AXI_BRDG_ID);
- if (id != BCM2835_BRDG_ID /* "BRDG" */) {
- dev_err(dev, "ASB register ID returned 0x%08x\n", id);
- return -ENODEV;
- }
-
- if (power->rpivid_asb) {
- id = readl(power->rpivid_asb + ASB_AXI_BRDG_ID);
- if (id != BCM2835_BRDG_ID /* "BRDG" */) {
- dev_err(dev, "RPiVid 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++) {
- ret = bcm2835_init_power_domain(power, i, power_domain_names[i]);
- if (ret)
- goto fail;
- }
-
- 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)
- goto fail;
-
- of_genpd_add_provider_onecell(dev->parent->of_node, &power->pd_xlate);
-
- dev_info(dev, "Broadcom BCM2835 power domains driver");
- return 0;
-
-fail:
- for (i = 0; i < ARRAY_SIZE(power_domain_names); i++) {
- struct generic_pm_domain *dom = &power->domains[i].base;
-
- if (dom->name)
- pm_genpd_remove(dom);
- }
- return ret;
-}
-
-static struct platform_driver bcm2835_power_driver = {
- .probe = bcm2835_power_probe,
- .driver = {
- .name = "bcm2835-power",
- },
-};
-module_platform_driver(bcm2835_power_driver);
-
-MODULE_AUTHOR("Eric Anholt <eric@anholt.net>");
-MODULE_DESCRIPTION("Driver for Broadcom BCM2835 PM power domains and reset");
generated by cgit v1.2.3 (git 2.39.0) at 2024-08-05 08:37:26 +0300