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378 lines
8.1 KiB
378 lines
8.1 KiB
// 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 <[email protected]> |
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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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struct resource *res; |
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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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res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
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power->base = devm_ioremap_resource(&pdev->dev, res); |
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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 = { |
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.name = "bcm63xx-power-controller", |
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.of_match_table = bcm63xx_power_of_match, |
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}, |
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.probe = bcm63xx_power_probe, |
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}; |
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builtin_platform_driver(bcm63xx_power_driver);
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