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[83.49.61.28]) by smtp.gmail.com with ESMTPSA id h5sm2949931wrw.85.2020.06.09.03.52.47 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 09 Jun 2020 03:52:48 -0700 (PDT) From: =?utf-8?q?=C3=81lvaro_Fern=C3=A1ndez_Rojas?= To: hauke@hauke-m.de, zajec5@gmail.com, tsbogend@alpha.franken.de, robh+dt@kernel.org, f.fainelli@gmail.com, jonas.gorski@gmail.com, bcm-kernel-feedback-list@broadcom.com, linux-mips@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH 2/4] soc: bcm: add BCM63xx power domain driver Date: Tue, 9 Jun 2020 12:52:42 +0200 Message-Id: <20200609105244.4014823-3-noltari@gmail.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200609105244.4014823-1-noltari@gmail.com> References: <20200609105244.4014823-1-noltari@gmail.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200609_035250_045507_21F25A2C X-CRM114-Status: GOOD ( 16.24 ) X-Spam-Score: -0.2 (/) X-Spam-Report: SpamAssassin version 3.4.4 on bombadil.infradead.org summary: Content analysis details: (-0.2 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [2a00:1450:4864:20:0:0:0:442 listed in] [list.dnswl.org] 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider [noltari[at]gmail.com] 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.0 SPF_PASS SPF: sender matches SPF record 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: =?utf-8?q?=C3=81lvaro_Fern=C3=A1ndez_Rojas?= Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org BCM6318, BCM6328, BCM6362 and BCM63268 SoCs have a power domain controller to enable/disable certain components in order to save power. Signed-off-by: Álvaro Fernández Rojas --- drivers/soc/bcm/Kconfig | 8 + drivers/soc/bcm/Makefile | 1 + drivers/soc/bcm/bcm63xx-power.c | 374 ++++++++++++++++++++++++++++++++ 3 files changed, 383 insertions(+) create mode 100644 drivers/soc/bcm/bcm63xx-power.c diff --git a/drivers/soc/bcm/Kconfig b/drivers/soc/bcm/Kconfig index 648e32693b7e..a2e60d28370b 100644 --- a/drivers/soc/bcm/Kconfig +++ b/drivers/soc/bcm/Kconfig @@ -13,6 +13,14 @@ config BCM2835_POWER firmware means that Linux usage of the same power domain must be accessed using the RASPBERRYPI_POWER driver +config BCM63XX_POWER + bool "BCM63xx power domain driver" + depends on BMIPS_GENERIC || (COMPILE_TEST && OF) + select PM_GENERIC_DOMAINS if PM + help + This enables support for the BCM63xx power domains controller on + BCM6318, BCM6328, BCM6362 and BCM63268 SoCs. + config RASPBERRYPI_POWER bool "Raspberry Pi power domain driver" depends on ARCH_BCM2835 || (COMPILE_TEST && OF) diff --git a/drivers/soc/bcm/Makefile b/drivers/soc/bcm/Makefile index d92268a829a9..e6c3d04a4a83 100644 --- a/drivers/soc/bcm/Makefile +++ b/drivers/soc/bcm/Makefile @@ -1,4 +1,5 @@ # SPDX-License-Identifier: GPL-2.0-only obj-$(CONFIG_BCM2835_POWER) += bcm2835-power.o +obj-$(CONFIG_BCM63XX_POWER) += bcm63xx-power.o obj-$(CONFIG_RASPBERRYPI_POWER) += raspberrypi-power.o obj-$(CONFIG_SOC_BRCMSTB) += brcmstb/ diff --git a/drivers/soc/bcm/bcm63xx-power.c b/drivers/soc/bcm/bcm63xx-power.c new file mode 100644 index 000000000000..b6e51b721f09 --- /dev/null +++ b/drivers/soc/bcm/bcm63xx-power.c @@ -0,0 +1,374 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * BCM63xx Power Domain Controller Driver + * + * Copyright (C) 2020 Álvaro Fernández Rojas + */ + +#include +#include +#include +#include +#include +#include + +struct bcm63xx_power_dev { + struct generic_pm_domain genpd; + struct bcm63xx_power *power; + uint32_t mask; +}; + +struct bcm63xx_power { + void __iomem *base; + spinlock_t lock; + struct bcm63xx_power_dev *dev; + struct genpd_onecell_data genpd_data; + struct generic_pm_domain **genpd; +}; + +struct bcm63xx_power_data { + const char * const name; + uint8_t bit; + unsigned int flags; +}; + +static int bcm63xx_power_get_state(struct bcm63xx_power_dev *pmd, bool *is_on) +{ + struct bcm63xx_power *power = pmd->power; + + if (!pmd->mask) { + *is_on = false; + return -EINVAL; + } + + *is_on = !(__raw_readl(power->base) & pmd->mask); + + return 0; +} + +static int bcm63xx_power_set_state(struct bcm63xx_power_dev *pmd, bool on) +{ + struct bcm63xx_power *power = pmd->power; + unsigned long flags; + uint32_t val; + + if (!pmd->mask) + return -EINVAL; + + spin_lock_irqsave(&power->lock, flags); + val = __raw_readl(power->base); + if (on) + val &= ~pmd->mask; + else + val |= pmd->mask; + __raw_writel(val, power->base); + spin_unlock_irqrestore(&power->lock, flags); + + return 0; +} + +static int bcm63xx_power_on(struct generic_pm_domain *genpd) +{ + struct bcm63xx_power_dev *pmd = container_of(genpd, + struct bcm63xx_power_dev, genpd); + + return bcm63xx_power_set_state(pmd, true); +} + +static int bcm63xx_power_off(struct generic_pm_domain *genpd) +{ + struct bcm63xx_power_dev *pmd = container_of(genpd, + struct bcm63xx_power_dev, genpd); + + return bcm63xx_power_set_state(pmd, false); +} + +static int bcm63xx_power_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct device_node *np = dev->of_node; + struct resource *res; + const struct bcm63xx_power_data *entry, *table; + struct bcm63xx_power *power; + unsigned int ndom; + uint8_t max_bit = 0; + int ret; + + power = devm_kzalloc(dev, sizeof(*power), GFP_KERNEL); + if (!power) + return -ENOMEM; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + power->base = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(power->base)) + return PTR_ERR(power->base); + + table = of_device_get_match_data(dev); + if (!table) + return -EINVAL; + + power->genpd_data.num_domains = 0; + ndom = 0; + for (entry = table; entry->name; entry++) { + max_bit = max(max_bit, entry->bit); + ndom++; + } + + if (!ndom) + return -ENODEV; + + power->genpd_data.num_domains = max_bit + 1; + + power->dev = devm_kcalloc(dev, power->genpd_data.num_domains, + sizeof(struct bcm63xx_power_dev), + GFP_KERNEL); + if (!power->dev) + return -ENOMEM; + + power->genpd = devm_kcalloc(dev, power->genpd_data.num_domains, + sizeof(struct generic_pm_domain *), + GFP_KERNEL); + if (!power->genpd) + return -ENOMEM; + + power->genpd_data.domains = power->genpd; + + ndom = 0; + for (entry = table; entry->name; entry++) { + struct bcm63xx_power_dev *pmd = &power->dev[ndom]; + bool is_on; + + pmd->power = power; + pmd->mask = BIT(entry->bit); + pmd->genpd.name = entry->name; + pmd->genpd.flags = entry->flags; + + ret = bcm63xx_power_get_state(pmd, &is_on); + if (ret) + dev_warn(dev, "unable to get current state for %s\n", + pmd->genpd.name); + + pmd->genpd.power_on = bcm63xx_power_on; + pmd->genpd.power_off = bcm63xx_power_off; + + pm_genpd_init(&pmd->genpd, NULL, !is_on); + power->genpd[entry->bit] = &pmd->genpd; + + ndom++; + } + + spin_lock_init(&power->lock); + + ret = of_genpd_add_provider_onecell(np, &power->genpd_data); + if (ret) { + dev_err(dev, "failed to register genpd driver: %d\n", ret); + return ret; + } + + dev_info(dev, "registered %u power domains\n", ndom); + + return 0; +} + +static const struct bcm63xx_power_data bcm6318_power_domains[] = { + { + .name = "pcie", + .bit = 0, + }, { + .name = "usb", + .bit = 1, + }, { + .name = "ephy0", + .bit = 2, + }, { + .name = "ephy1", + .bit = 3, + }, { + .name = "ephy2", + .bit = 4, + }, { + .name = "ephy3", + .bit = 5, + }, { + .name = "ldo2p5", + .bit = 6, + .flags = GENPD_FLAG_ALWAYS_ON, + }, { + .name = "ldo2p9", + .bit = 7, + .flags = GENPD_FLAG_ALWAYS_ON, + }, { + .name = "sw1p0", + .bit = 8, + .flags = GENPD_FLAG_ALWAYS_ON, + }, { + .name = "pad", + .bit = 9, + .flags = GENPD_FLAG_ALWAYS_ON, + }, { + /* sentinel */ + }, +}; + +static const struct bcm63xx_power_data bcm6328_power_domains[] = { + { + .name = "adsl2-mips", + .bit = 0, + }, { + .name = "adsl2-phy", + .bit = 1, + }, { + .name = "adsl2-afe", + .bit = 2, + }, { + .name = "sar", + .bit = 3, + }, { + .name = "pcm", + .bit = 4, + }, { + .name = "usbd", + .bit = 5, + }, { + .name = "usbh", + .bit = 6, + }, { + .name = "pcie", + .bit = 7, + }, { + .name = "robosw", + .bit = 8, + }, { + .name = "ephy", + .bit = 9, + }, { + /* sentinel */ + }, +}; + +static const struct bcm63xx_power_data bcm6362_power_domains[] = { + { + .name = "sar", + .bit = 0, + }, { + .name = "ipsec", + .bit = 1, + }, { + .name = "mips", + .bit = 2, + .flags = GENPD_FLAG_ALWAYS_ON, + }, { + .name = "dect", + .bit = 3, + }, { + .name = "usbh", + .bit = 4, + }, { + .name = "usbd", + .bit = 5, + }, { + .name = "robosw", + .bit = 6, + }, { + .name = "pcm", + .bit = 7, + }, { + .name = "periph", + .bit = 8, + .flags = GENPD_FLAG_ALWAYS_ON, + }, { + .name = "adsl-phy", + .bit = 9, + }, { + .name = "gmii-pads", + .bit = 10, + }, { + .name = "fap", + .bit = 11, + }, { + .name = "pcie", + .bit = 12, + }, { + .name = "wlan-pads", + .bit = 13, + }, { + /* sentinel */ + }, +}; + +static const struct bcm63xx_power_data bcm63268_power_domains[] = { + { + .name = "sar", + .bit = 0, + }, { + .name = "ipsec", + .bit = 1, + }, { + .name = "mips", + .bit = 2, + .flags = GENPD_FLAG_ALWAYS_ON, + }, { + .name = "dect", + .bit = 3, + }, { + .name = "usbh", + .bit = 4, + }, { + .name = "usbd", + .bit = 5, + }, { + .name = "robosw", + .bit = 6, + }, { + .name = "pcm", + .bit = 7, + }, { + .name = "periph", + .bit = 8, + .flags = GENPD_FLAG_ALWAYS_ON, + }, { + .name = "vdsl-phy", + .bit = 9, + }, { + .name = "vdsl-mips", + .bit = 10, + }, { + .name = "fap", + .bit = 11, + }, { + .name = "pcie", + .bit = 12, + }, { + .name = "wlan-pads", + .bit = 13, + }, { + /* sentinel */ + }, +}; + +static const struct of_device_id bcm63xx_power_of_match[] = { + { + .compatible = "brcm,bcm6318-power-controller", + .data = &bcm6318_power_domains, + }, { + .compatible = "brcm,bcm6328-power-controller", + .data = &bcm6328_power_domains, + }, { + .compatible = "brcm,bcm6362-power-controller", + .data = &bcm6362_power_domains, + }, { + .compatible = "brcm,bcm63268-power-controller", + .data = &bcm63268_power_domains, + }, { + /* sentinel */ + } +}; + +static struct platform_driver bcm63xx_power_driver = { + .driver = { + .name = "bcm63xx-power-controller", + .of_match_table = bcm63xx_power_of_match, + }, + .probe = bcm63xx_power_probe, +}; +builtin_platform_driver(bcm63xx_power_driver);