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Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Maxime Coquelin , Alexandre Torgue , Vinod Koul , Giuseppe Cavallaro , Chen-Yu Tsai , Jernej Skrabec , Neil Armstrong , Kevin Hilman , Jerome Brunet , Shawn Guo , Fabio Estevam , Jan Petrous , s32@nxp.com, Mohd Ayaan Anwar , Romain Gantois , Geert Uytterhoeven , Magnus Damm , Maxime Ripard , Christophe Roullier , Bartosz Golaszewski , Radu Rendec Cc: linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org, Drew Fustini , linux-sunxi@lists.linux.dev, linux-amlogic@lists.infradead.org, linux-mips@vger.kernel.org, imx@lists.linux.dev, linux-renesas-soc@vger.kernel.org, linux-rockchip@lists.infradead.org, sophgo@lists.linux.dev, linux-riscv@lists.infradead.org, brgl@kernel.org, Bartosz Golaszewski , Bartosz Golaszewski X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=6726; i=bartosz.golaszewski@oss.qualcomm.com; h=from:subject:message-id; bh=px3gFNalJW0myw4JO8FxOi8xC4WUF57/BsmFQdIQdYc=; b=owEBbQKS/ZANAwAKAQWdLsv/NoTDAcsmYgBqS6uchS4csS4YIcS0mi1Ifm+LIJhbGgTUvShSf ydPuYJXWmaJAjMEAAEKAB0WIQSR5RMt5bVGHXuiZfwFnS7L/zaEwwUCakurnAAKCRAFnS7L/zaE w0zzD/9SCsUE9nshAQyInqJLWoFIM8/bv54ACwjrQ2SLcq5ghDCutaXpCzCQFH79QU3gcsV7hid 9WRL1B3pvXCNlRmZMDmiPdmHymy+1cCQ2nz0kzyELvhGm19aaJyIVRajtt2qkCdUFa9rJTnrL1L EHSieziZDKkw0UCo1GTEJZl4oq9Fb08FdSsJBMFI0aRlr8DrhYRVVE1Nj2qjHPRV+RWbNqmSf0K 69XA2gEVSIYqykcHzGIi1V6hIoxhbwdoJsPv9KoAhoJqv7McGTZkRu2VpR31aH7rAWw1La5PFeH KU96pFcBkSvy8a+lh5eJ9ES5FPv/hth4mNWQtUdjugM9b0o1GGTOXkyId2OwBA6IqbaAz4dzKtl 3u/I28s1UVntXT33yfliBNrV0d3ZVUYOqNXWhDx0yRCv70fP6LJiP8fitPovwynNOlTNHdOHSVH 3Q+emhc9KPvwGauW5lipa3RqCqGmcwZQsMpyqNQh66czQKWB4V+HFkls+Ao55bX83NRZHK67g4W ur9Dokj/KleRMu3g2FU4zm3nR6sdWnRNacQS4MyBnxzSpdDxICRxC6udFodF0Xtw4Wk+jVZvqwX ZYoqv4ylO5Kal6ukUy3bUMkLTbCdLXdXPjNekUOOOkss7LcURiWU073B59r/QQSY/BGGwersAeW gWBpQTcQFWqJsaA== X-Developer-Key: i=bartosz.golaszewski@oss.qualcomm.com; a=openpgp; fpr=169DEB6C0BC3C46013D2C79F11A72EA01471D772 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNzA2MDEzNiBTYWx0ZWRfXz5tvWC4qClfL 20SgNW7rDwI27cqaPyRXEdu9XW1bWJWMmvF1WNt/4DK+mjgz0+VGPu77NliKovzInpIC9tAapI1 n1JrHyRPCEfDPiulWF7pa/Xa9vmQSn2jf9AtQ+d2YT+fkHOfFipm+tiIP1aeagAX+TYqfFT5O1y Z+VS9zrG1ShgE52ARXdStOeY9WrcJlHr6YyBOtMg2S9fr9xGXfE0FzhJqYKBMzj26UuQ+dgUq7O bly2UXLSJKSn8giSVjBCJ0byEBYWr5N/8yrLjwrajT3ZdoyGavmf09T9YpFkva6M+AshhUTPyQW 3OEO7Ux1Mjg9T4XzTHNkcqAtT/qZr8CiJTxgLKHlhTc5eZYBJVYYCKd6z/utmQbWx0noiLKZ9L7 ChCzJF2OCFx99HpMQTjct6uQv6aR9eL0bMuQ1z7Ozl8ZmX7O1h++GhwYxzIduYpvfW5Me+ubFF/ bEWtzgUuK4EEnDOj+6g== X-Proofpoint-Spam-Info: AW1haW4tMjYwNzA2MDEzNiBTYWx0ZWRfX87/Xne9oKQY2 2uc/ZASPwi1rEOMDdmaCyZmxIMC5EgCPRMHjuCFK9vF7duJ+z0lUh7hHgoCYmuSrGi2duyVYZ10 d0hyfOqzamm+rfm3sdsVJZ/kk1XAn0o= X-Proofpoint-GUID: bnGA1MU95h5ZS_KRy4igr_M-vdfS8-hB X-Proofpoint-ORIG-GUID: bnGA1MU95h5ZS_KRy4igr_M-vdfS8-hB X-Authority-Analysis: v=2.4 cv=OKcXGyaB c=1 sm=1 tr=0 ts=6a4babac cx=c_pps a=HLyN3IcIa5EE8TELMZ618Q==:117 a=xqWC_Br6kY4A:10 a=IkcTkHD0fZMA:10 a=RAioF0-LDSMA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=3WHJM1ZQz_JShphwDgj5:22 a=EUspDBNiAAAA:8 a=ZvYg6ySBQLmwDIutsxAA:9 a=QEXdDO2ut3YA:10 a=bTQJ7kPSJx9SKPbeHEYW:22 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-07-06_01,2026-07-06_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 adultscore=0 malwarescore=0 clxscore=1015 suspectscore=0 spamscore=0 phishscore=0 priorityscore=1501 impostorscore=0 bulkscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2607060136 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260706_062045_646777_10BA2A98 X-CRM114-Status: GOOD ( 23.09 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Implement support for the firmware-managed SGMII/SerDes PHY present on Qualcomm platforms. Do this as a separate driver from the HLOS-managed variant as they don't share almost any code. Signed-off-by: Bartosz Golaszewski --- drivers/phy/qualcomm/Kconfig | 11 ++ drivers/phy/qualcomm/Makefile | 1 + drivers/phy/qualcomm/phy-qcom-sgmii-eth-scmi.c | 161 +++++++++++++++++++++++++ 3 files changed, 173 insertions(+) diff --git a/drivers/phy/qualcomm/Kconfig b/drivers/phy/qualcomm/Kconfig index 60a0ead127fa9f08749e1bc686e15cc5eb341c28..a7cf348f6a7aa18e8b3f39f109b02ea672ae4177 100644 --- a/drivers/phy/qualcomm/Kconfig +++ b/drivers/phy/qualcomm/Kconfig @@ -232,3 +232,14 @@ config PHY_QCOM_SGMII_ETH help Enable this to support the internal SerDes/SGMII PHY on various Qualcomm chipsets. + +config PHY_QCOM_SGMII_ETH_SCMI + tristate "Qualcomm DWMAC SGMII SerDes/PHY driver (firmware managed)" + depends on OF && (ARCH_QCOM || COMPILE_TEST) + select GENERIC_PHY + select PM + select PM_GENERIC_DOMAINS + help + Enable this to support the internal SerDes/SGMII PHY on Qualcomm + chipsets where the SerDes hardware (clocks and registers) is owned + by the firmware. diff --git a/drivers/phy/qualcomm/Makefile b/drivers/phy/qualcomm/Makefile index b71a6a0bed3f1489b1d07664ecd728f1db145986..032e582f2e1af96687484ce28aaba0c2ef73e754 100644 --- a/drivers/phy/qualcomm/Makefile +++ b/drivers/phy/qualcomm/Makefile @@ -25,3 +25,4 @@ obj-$(CONFIG_PHY_QCOM_USB_SS) += phy-qcom-usb-ss.o obj-$(CONFIG_PHY_QCOM_USB_SNPS_FEMTO_V2)+= phy-qcom-snps-femto-v2.o obj-$(CONFIG_PHY_QCOM_IPQ806X_USB) += phy-qcom-ipq806x-usb.o obj-$(CONFIG_PHY_QCOM_SGMII_ETH) += phy-qcom-sgmii-eth.o +obj-$(CONFIG_PHY_QCOM_SGMII_ETH_SCMI) += phy-qcom-sgmii-eth-scmi.o diff --git a/drivers/phy/qualcomm/phy-qcom-sgmii-eth-scmi.c b/drivers/phy/qualcomm/phy-qcom-sgmii-eth-scmi.c new file mode 100644 index 0000000000000000000000000000000000000000..8ee62189556fe4ff0d8aa2f8b105175e08000b7c --- /dev/null +++ b/drivers/phy/qualcomm/phy-qcom-sgmii-eth-scmi.c @@ -0,0 +1,161 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) Qualcomm Technologies, Inc. and/or its subsidiaries. + * + * Firmware-managed variant of the Qualcomm DWMAC SGMII SerDes/PHY driver. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +struct qcom_dwmac_sgmii_phy_scmi { + unsigned int perf_state; +}; + +static int qcom_dwmac_sgmii_phy_scmi_power_on(struct phy *phy) +{ + struct qcom_dwmac_sgmii_phy_scmi *priv = phy_get_drvdata(phy); + struct device *dev = phy->dev.parent; + int ret; + + ret = pm_runtime_resume_and_get(dev); + if (ret) + return ret; + + ret = dev_pm_genpd_set_performance_state(dev, priv->perf_state); + if (ret) { + pm_runtime_put(dev); + return ret; + } + + usleep_range(5000, 10000); + + return 0; +} + +static int qcom_dwmac_sgmii_phy_scmi_power_off(struct phy *phy) +{ + struct device *dev = phy->dev.parent; + + dev_pm_genpd_set_performance_state(dev, 0); + pm_runtime_put(dev); + + return 0; +} + +static int qcom_dwmac_sgmii_phy_scmi_validate(struct phy *phy, enum phy_mode mode, + int submode, + union phy_configure_opts *opts) +{ + if (mode != PHY_MODE_ETHERNET) + return -EINVAL; + + switch (submode) { + case PHY_INTERFACE_MODE_SGMII: + case PHY_INTERFACE_MODE_1000BASEX: + case PHY_INTERFACE_MODE_2500BASEX: + return 0; + default: + return -EINVAL; + } +} + +static int qcom_dwmac_sgmii_phy_scmi_set_mode(struct phy *phy, enum phy_mode mode, + int submode) +{ + struct qcom_dwmac_sgmii_phy_scmi *priv = phy_get_drvdata(phy); + int ret; + + ret = qcom_dwmac_sgmii_phy_scmi_validate(phy, mode, submode, NULL); + if (ret) + return ret; + + priv->perf_state = (submode == PHY_INTERFACE_MODE_2500BASEX) ? + SPEED_2500 : SPEED_1000; + + return 0; +} + +static const struct phy_ops qcom_dwmac_sgmii_phy_scmi_ops = { + .power_on = qcom_dwmac_sgmii_phy_scmi_power_on, + .power_off = qcom_dwmac_sgmii_phy_scmi_power_off, + .set_mode = qcom_dwmac_sgmii_phy_scmi_set_mode, + .validate = qcom_dwmac_sgmii_phy_scmi_validate, + .owner = THIS_MODULE, +}; + +static void qcom_dwmac_sgmii_phy_scmi_runtime_disable(void *data) +{ + struct device *dev = data; + + pm_runtime_disable(dev); +} + +static int qcom_dwmac_sgmii_phy_scmi_probe(struct platform_device *pdev) +{ + struct qcom_dwmac_sgmii_phy_scmi *priv; + struct device *dev = &pdev->dev; + struct phy_provider *provider; + struct phy *phy; + int ret; + + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + priv->perf_state = SPEED_1000; + + /* + * Enable runtime PM on the provider before creating the PHY so that the + * PHY core enables runtime PM on the PHY device too. The single SCMI + * power domain has already been attached to this device by the driver + * core, so runtime PM votes propagate to firmware through the genpd + * device link. No register or clock access is done here - firmware owns + * the SerDes. + */ + pm_runtime_enable(dev); + + ret = devm_add_action_or_reset(dev, qcom_dwmac_sgmii_phy_scmi_runtime_disable, dev); + if (ret) + return ret; + + phy = devm_phy_create(dev, NULL, &qcom_dwmac_sgmii_phy_scmi_ops); + if (IS_ERR(phy)) + return dev_err_probe(dev, PTR_ERR(phy), "failed to create the phy\n"); + + phy_set_drvdata(phy, priv); + + provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate); + if (IS_ERR(provider)) + return dev_err_probe(dev, PTR_ERR(provider), + "failed to register the PHY provider\n"); + + return 0; +} + +static const struct of_device_id qcom_dwmac_sgmii_phy_scmi_of_match[] = { + { .compatible = "qcom,sa8255p-dwmac-sgmii-phy" }, + { } +}; +MODULE_DEVICE_TABLE(of, qcom_dwmac_sgmii_phy_scmi_of_match); + +static struct platform_driver qcom_dwmac_sgmii_phy_scmi_driver = { + .probe = qcom_dwmac_sgmii_phy_scmi_probe, + .driver = { + .name = "qcom-dwmac-sgmii-phy-scmi", + .of_match_table = qcom_dwmac_sgmii_phy_scmi_of_match, + }, +}; +module_platform_driver(qcom_dwmac_sgmii_phy_scmi_driver); + +MODULE_DESCRIPTION("Qualcomm DWMAC SGMII PHY driver (firmware managed)"); +MODULE_AUTHOR("Bartosz Golaszewski "); +MODULE_LICENSE("GPL"); -- 2.47.3