377 lines
8.0 KiB
C
377 lines
8.0 KiB
C
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// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* BCM63xx Power Domain Controller Driver
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*
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* Copyright (C) 2020 Álvaro Fernández Rojas <noltari@gmail.com>
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*/
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#include <dt-bindings/soc/bcm6318-pm.h>
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#include <dt-bindings/soc/bcm6328-pm.h>
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#include <dt-bindings/soc/bcm6362-pm.h>
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#include <dt-bindings/soc/bcm63268-pm.h>
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#include <linux/io.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/pm_domain.h>
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#include <linux/of.h>
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#include <linux/of_device.h>
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struct bcm63xx_power_dev {
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struct generic_pm_domain genpd;
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struct bcm63xx_power *power;
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uint32_t mask;
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};
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struct bcm63xx_power {
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void __iomem *base;
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spinlock_t lock;
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struct bcm63xx_power_dev *dev;
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struct genpd_onecell_data genpd_data;
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struct generic_pm_domain **genpd;
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};
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struct bcm63xx_power_data {
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const char * const name;
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uint8_t bit;
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unsigned int flags;
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};
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static int bcm63xx_power_get_state(struct bcm63xx_power_dev *pmd, bool *is_on)
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{
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struct bcm63xx_power *power = pmd->power;
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if (!pmd->mask) {
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*is_on = false;
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return -EINVAL;
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}
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*is_on = !(__raw_readl(power->base) & pmd->mask);
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return 0;
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}
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static int bcm63xx_power_set_state(struct bcm63xx_power_dev *pmd, bool on)
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{
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struct bcm63xx_power *power = pmd->power;
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unsigned long flags;
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uint32_t val;
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if (!pmd->mask)
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return -EINVAL;
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spin_lock_irqsave(&power->lock, flags);
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val = __raw_readl(power->base);
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if (on)
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val &= ~pmd->mask;
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else
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val |= pmd->mask;
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__raw_writel(val, power->base);
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spin_unlock_irqrestore(&power->lock, flags);
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return 0;
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}
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static int bcm63xx_power_on(struct generic_pm_domain *genpd)
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{
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struct bcm63xx_power_dev *pmd = container_of(genpd,
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struct bcm63xx_power_dev, genpd);
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return bcm63xx_power_set_state(pmd, true);
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}
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static int bcm63xx_power_off(struct generic_pm_domain *genpd)
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{
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struct bcm63xx_power_dev *pmd = container_of(genpd,
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struct bcm63xx_power_dev, genpd);
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return bcm63xx_power_set_state(pmd, false);
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}
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static int bcm63xx_power_probe(struct platform_device *pdev)
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{
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struct device *dev = &pdev->dev;
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struct device_node *np = dev->of_node;
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const struct bcm63xx_power_data *entry, *table;
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struct bcm63xx_power *power;
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unsigned int ndom;
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uint8_t max_bit = 0;
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int ret;
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power = devm_kzalloc(dev, sizeof(*power), GFP_KERNEL);
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if (!power)
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return -ENOMEM;
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power->base = devm_platform_ioremap_resource(pdev, 0);
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if (IS_ERR(power->base))
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return PTR_ERR(power->base);
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table = of_device_get_match_data(dev);
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if (!table)
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return -EINVAL;
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power->genpd_data.num_domains = 0;
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ndom = 0;
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for (entry = table; entry->name; entry++) {
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max_bit = max(max_bit, entry->bit);
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ndom++;
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}
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if (!ndom)
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return -ENODEV;
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power->genpd_data.num_domains = max_bit + 1;
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power->dev = devm_kcalloc(dev, power->genpd_data.num_domains,
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sizeof(struct bcm63xx_power_dev),
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GFP_KERNEL);
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if (!power->dev)
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return -ENOMEM;
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power->genpd = devm_kcalloc(dev, power->genpd_data.num_domains,
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sizeof(struct generic_pm_domain *),
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GFP_KERNEL);
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if (!power->genpd)
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return -ENOMEM;
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power->genpd_data.domains = power->genpd;
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ndom = 0;
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for (entry = table; entry->name; entry++) {
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struct bcm63xx_power_dev *pmd = &power->dev[ndom];
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bool is_on;
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pmd->power = power;
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pmd->mask = BIT(entry->bit);
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pmd->genpd.name = entry->name;
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pmd->genpd.flags = entry->flags;
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ret = bcm63xx_power_get_state(pmd, &is_on);
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if (ret)
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dev_warn(dev, "unable to get current state for %s\n",
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pmd->genpd.name);
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pmd->genpd.power_on = bcm63xx_power_on;
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pmd->genpd.power_off = bcm63xx_power_off;
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pm_genpd_init(&pmd->genpd, NULL, !is_on);
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power->genpd[entry->bit] = &pmd->genpd;
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ndom++;
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}
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spin_lock_init(&power->lock);
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ret = of_genpd_add_provider_onecell(np, &power->genpd_data);
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if (ret) {
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dev_err(dev, "failed to register genpd driver: %d\n", ret);
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return ret;
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}
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dev_info(dev, "registered %u power domains\n", ndom);
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return 0;
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}
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static const struct bcm63xx_power_data bcm6318_power_domains[] = {
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{
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.name = "pcie",
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.bit = BCM6318_POWER_DOMAIN_PCIE,
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}, {
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.name = "usb",
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.bit = BCM6318_POWER_DOMAIN_USB,
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}, {
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.name = "ephy0",
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.bit = BCM6318_POWER_DOMAIN_EPHY0,
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}, {
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.name = "ephy1",
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.bit = BCM6318_POWER_DOMAIN_EPHY1,
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}, {
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.name = "ephy2",
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.bit = BCM6318_POWER_DOMAIN_EPHY2,
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}, {
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.name = "ephy3",
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.bit = BCM6318_POWER_DOMAIN_EPHY3,
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}, {
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.name = "ldo2p5",
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.bit = BCM6318_POWER_DOMAIN_LDO2P5,
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.flags = GENPD_FLAG_ALWAYS_ON,
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}, {
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.name = "ldo2p9",
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.bit = BCM6318_POWER_DOMAIN_LDO2P9,
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.flags = GENPD_FLAG_ALWAYS_ON,
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}, {
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.name = "sw1p0",
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.bit = BCM6318_POWER_DOMAIN_SW1P0,
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.flags = GENPD_FLAG_ALWAYS_ON,
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}, {
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.name = "pad",
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.bit = BCM6318_POWER_DOMAIN_PAD,
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.flags = GENPD_FLAG_ALWAYS_ON,
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}, {
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/* sentinel */
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},
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};
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static const struct bcm63xx_power_data bcm6328_power_domains[] = {
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{
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.name = "adsl2-mips",
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.bit = BCM6328_POWER_DOMAIN_ADSL2_MIPS,
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}, {
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.name = "adsl2-phy",
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.bit = BCM6328_POWER_DOMAIN_ADSL2_PHY,
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}, {
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.name = "adsl2-afe",
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.bit = BCM6328_POWER_DOMAIN_ADSL2_AFE,
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}, {
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.name = "sar",
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.bit = BCM6328_POWER_DOMAIN_SAR,
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}, {
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.name = "pcm",
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.bit = BCM6328_POWER_DOMAIN_PCM,
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}, {
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.name = "usbd",
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.bit = BCM6328_POWER_DOMAIN_USBD,
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}, {
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.name = "usbh",
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.bit = BCM6328_POWER_DOMAIN_USBH,
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}, {
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.name = "pcie",
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.bit = BCM6328_POWER_DOMAIN_PCIE,
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}, {
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.name = "robosw",
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.bit = BCM6328_POWER_DOMAIN_ROBOSW,
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}, {
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.name = "ephy",
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.bit = BCM6328_POWER_DOMAIN_EPHY,
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}, {
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/* sentinel */
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},
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};
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static const struct bcm63xx_power_data bcm6362_power_domains[] = {
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{
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.name = "sar",
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.bit = BCM6362_POWER_DOMAIN_SAR,
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}, {
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.name = "ipsec",
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.bit = BCM6362_POWER_DOMAIN_IPSEC,
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}, {
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.name = "mips",
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.bit = BCM6362_POWER_DOMAIN_MIPS,
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.flags = GENPD_FLAG_ALWAYS_ON,
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}, {
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.name = "dect",
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.bit = BCM6362_POWER_DOMAIN_DECT,
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}, {
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.name = "usbh",
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.bit = BCM6362_POWER_DOMAIN_USBH,
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}, {
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.name = "usbd",
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.bit = BCM6362_POWER_DOMAIN_USBD,
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}, {
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.name = "robosw",
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.bit = BCM6362_POWER_DOMAIN_ROBOSW,
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}, {
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.name = "pcm",
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.bit = BCM6362_POWER_DOMAIN_PCM,
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}, {
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.name = "periph",
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.bit = BCM6362_POWER_DOMAIN_PERIPH,
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.flags = GENPD_FLAG_ALWAYS_ON,
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}, {
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.name = "adsl-phy",
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.bit = BCM6362_POWER_DOMAIN_ADSL_PHY,
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}, {
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.name = "gmii-pads",
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.bit = BCM6362_POWER_DOMAIN_GMII_PADS,
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}, {
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.name = "fap",
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.bit = BCM6362_POWER_DOMAIN_FAP,
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}, {
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.name = "pcie",
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.bit = BCM6362_POWER_DOMAIN_PCIE,
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}, {
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.name = "wlan-pads",
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.bit = BCM6362_POWER_DOMAIN_WLAN_PADS,
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}, {
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/* sentinel */
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},
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};
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static const struct bcm63xx_power_data bcm63268_power_domains[] = {
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{
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.name = "sar",
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.bit = BCM63268_POWER_DOMAIN_SAR,
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}, {
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.name = "ipsec",
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.bit = BCM63268_POWER_DOMAIN_IPSEC,
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}, {
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.name = "mips",
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.bit = BCM63268_POWER_DOMAIN_MIPS,
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.flags = GENPD_FLAG_ALWAYS_ON,
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}, {
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.name = "dect",
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.bit = BCM63268_POWER_DOMAIN_DECT,
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}, {
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.name = "usbh",
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.bit = BCM63268_POWER_DOMAIN_USBH,
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}, {
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.name = "usbd",
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.bit = BCM63268_POWER_DOMAIN_USBD,
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}, {
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.name = "robosw",
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.bit = BCM63268_POWER_DOMAIN_ROBOSW,
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}, {
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.name = "pcm",
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.bit = BCM63268_POWER_DOMAIN_PCM,
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}, {
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.name = "periph",
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.bit = BCM63268_POWER_DOMAIN_PERIPH,
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.flags = GENPD_FLAG_ALWAYS_ON,
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}, {
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.name = "vdsl-phy",
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.bit = BCM63268_POWER_DOMAIN_VDSL_PHY,
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}, {
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.name = "vdsl-mips",
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.bit = BCM63268_POWER_DOMAIN_VDSL_MIPS,
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}, {
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.name = "fap",
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.bit = BCM63268_POWER_DOMAIN_FAP,
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}, {
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.name = "pcie",
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.bit = BCM63268_POWER_DOMAIN_PCIE,
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}, {
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.name = "wlan-pads",
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.bit = BCM63268_POWER_DOMAIN_WLAN_PADS,
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}, {
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/* sentinel */
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},
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};
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static const struct of_device_id bcm63xx_power_of_match[] = {
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{
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.compatible = "brcm,bcm6318-power-controller",
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.data = &bcm6318_power_domains,
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}, {
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.compatible = "brcm,bcm6328-power-controller",
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.data = &bcm6328_power_domains,
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}, {
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.compatible = "brcm,bcm6362-power-controller",
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.data = &bcm6362_power_domains,
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}, {
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.compatible = "brcm,bcm63268-power-controller",
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.data = &bcm63268_power_domains,
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}, {
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/* sentinel */
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}
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};
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static struct platform_driver bcm63xx_power_driver = {
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.driver = {
|
||
|
|
.name = "bcm63xx-power-controller",
|
||
|
|
.of_match_table = bcm63xx_power_of_match,
|
||
|
|
},
|
||
|
|
.probe = bcm63xx_power_probe,
|
||
|
|
};
|
||
|
|
builtin_platform_driver(bcm63xx_power_driver);
|