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Fri, 23 Aug 2024 08:57:11 +0000 Received: from PAXPR04MB8459.eurprd04.prod.outlook.com ([fe80::165a:30a2:5835:9630]) by PAXPR04MB8459.eurprd04.prod.outlook.com ([fe80::165a:30a2:5835:9630%6]) with mapi id 15.20.7897.014; Fri, 23 Aug 2024 08:57:10 +0000 From: "Peng Fan (OSS)" Date: Fri, 23 Aug 2024 17:05:21 +0800 Subject: [PATCH v8 5/7] firmware: imx: add i.MX95 MISC driver Message-Id: <20240823-imx95-bbm-misc-v2-v8-5-e600ed9e9271@nxp.com> References: <20240823-imx95-bbm-misc-v2-v8-0-e600ed9e9271@nxp.com> In-Reply-To: <20240823-imx95-bbm-misc-v2-v8-0-e600ed9e9271@nxp.com> To: Sudeep Holla , Cristian Marussi , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Shawn Guo , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , Peng Fan , Alexandre Belloni , Dmitry Torokhov Cc: arm-scmi@vger.kernel.org, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, imx@lists.linux.dev, linux-rtc@vger.kernel.org, linux-input@vger.kernel.org X-Mailer: b4 0.14.1 X-Developer-Signature: v=1; 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The driver is to add the support. Reviewed-by: Cristian Marussi Signed-off-by: Peng Fan --- drivers/firmware/imx/Kconfig | 11 ++++ drivers/firmware/imx/Makefile | 1 + drivers/firmware/imx/sm-misc.c | 119 ++++++++++++++++++++++++++++++++++++++++ include/linux/firmware/imx/sm.h | 33 +++++++++++ 4 files changed, 164 insertions(+) diff --git a/drivers/firmware/imx/Kconfig b/drivers/firmware/imx/Kconfig index 183613f82a11..477d3f32d99a 100644 --- a/drivers/firmware/imx/Kconfig +++ b/drivers/firmware/imx/Kconfig @@ -22,3 +22,14 @@ config IMX_SCU This driver manages the IPC interface between host CPU and the SCU firmware running on M4. + +config IMX_SCMI_MISC_DRV + tristate "IMX SCMI MISC Protocol driver" + depends on IMX_SCMI_MISC_EXT || COMPILE_TEST + default y if ARCH_MXC + help + The System Controller Management Interface firmware (SCMI FW) is + a low-level system function which runs on a dedicated Cortex-M + core that could provide misc functions such as board control. + + This driver can also be built as a module. diff --git a/drivers/firmware/imx/Makefile b/drivers/firmware/imx/Makefile index 8f9f04a513a8..8d046c341be8 100644 --- a/drivers/firmware/imx/Makefile +++ b/drivers/firmware/imx/Makefile @@ -1,3 +1,4 @@ # SPDX-License-Identifier: GPL-2.0 obj-$(CONFIG_IMX_DSP) += imx-dsp.o obj-$(CONFIG_IMX_SCU) += imx-scu.o misc.o imx-scu-irq.o rm.o imx-scu-soc.o +obj-${CONFIG_IMX_SCMI_MISC_DRV} += sm-misc.o diff --git a/drivers/firmware/imx/sm-misc.c b/drivers/firmware/imx/sm-misc.c new file mode 100644 index 000000000000..fc3ee12c2be8 --- /dev/null +++ b/drivers/firmware/imx/sm-misc.c @@ -0,0 +1,119 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright 2024 NXP + */ + +#include +#include +#include +#include +#include +#include + +static const struct scmi_imx_misc_proto_ops *imx_misc_ctrl_ops; +static struct scmi_protocol_handle *ph; +struct notifier_block scmi_imx_misc_ctrl_nb; + +int scmi_imx_misc_ctrl_set(u32 id, u32 val) +{ + if (!ph) + return -EPROBE_DEFER; + + return imx_misc_ctrl_ops->misc_ctrl_set(ph, id, 1, &val); +}; +EXPORT_SYMBOL(scmi_imx_misc_ctrl_set); + +int scmi_imx_misc_ctrl_get(u32 id, u32 *num, u32 *val) +{ + if (!ph) + return -EPROBE_DEFER; + + return imx_misc_ctrl_ops->misc_ctrl_get(ph, id, num, val); +} +EXPORT_SYMBOL(scmi_imx_misc_ctrl_get); + +static int scmi_imx_misc_ctrl_notifier(struct notifier_block *nb, + unsigned long event, void *data) +{ + /* + * notifier_chain_register requires a valid notifier_block and + * valid notifier_call. SCMI_EVENT_IMX_MISC_CONTROL is needed + * to let SCMI firmware enable control events, but the hook here + * is just a dummy function to avoid kernel panic as of now. + */ + return 0; +} + +static int scmi_imx_misc_ctrl_probe(struct scmi_device *sdev) +{ + const struct scmi_handle *handle = sdev->handle; + struct device_node *np = sdev->dev.of_node; + u32 src_id, flags; + int ret, i, num; + + if (!handle) + return -ENODEV; + + if (imx_misc_ctrl_ops) { + dev_err(&sdev->dev, "misc ctrl already initialized\n"); + return -EEXIST; + } + + imx_misc_ctrl_ops = handle->devm_protocol_get(sdev, SCMI_PROTOCOL_IMX_MISC, &ph); + if (IS_ERR(imx_misc_ctrl_ops)) + return PTR_ERR(imx_misc_ctrl_ops); + + num = of_property_count_u32_elems(np, "nxp,ctrl-ids"); + if (num % 2) { + dev_err(&sdev->dev, "Invalid wakeup-sources\n"); + return -EINVAL; + } + + scmi_imx_misc_ctrl_nb.notifier_call = &scmi_imx_misc_ctrl_notifier; + for (i = 0; i < num; i += 2) { + ret = of_property_read_u32_index(np, "nxp,ctrl-ids", i, &src_id); + if (ret) { + dev_err(&sdev->dev, "Failed to read ctrl-id: %i\n", i); + continue; + } + + ret = of_property_read_u32_index(np, "nxp,ctrl-ids", i + 1, &flags); + if (ret) { + dev_err(&sdev->dev, "Failed to read ctrl-id value: %d\n", i + 1); + continue; + } + + ret = handle->notify_ops->devm_event_notifier_register(sdev, SCMI_PROTOCOL_IMX_MISC, + SCMI_EVENT_IMX_MISC_CONTROL, + &src_id, + &scmi_imx_misc_ctrl_nb); + if (ret) { + dev_err(&sdev->dev, "Failed to register scmi misc event: %d\n", src_id); + } else { + ret = imx_misc_ctrl_ops->misc_ctrl_req_notify(ph, src_id, + SCMI_EVENT_IMX_MISC_CONTROL, + flags); + if (ret) + dev_err(&sdev->dev, "Failed to req notify: %d\n", src_id); + } + } + + return 0; +} + +static const struct scmi_device_id scmi_id_table[] = { + { SCMI_PROTOCOL_IMX_MISC, "imx-misc-ctrl" }, + { }, +}; +MODULE_DEVICE_TABLE(scmi, scmi_id_table); + +static struct scmi_driver scmi_imx_misc_ctrl_driver = { + .name = "scmi-imx-misc-ctrl", + .probe = scmi_imx_misc_ctrl_probe, + .id_table = scmi_id_table, +}; +module_scmi_driver(scmi_imx_misc_ctrl_driver); + +MODULE_AUTHOR("Peng Fan "); +MODULE_DESCRIPTION("IMX SM MISC driver"); +MODULE_LICENSE("GPL"); diff --git a/include/linux/firmware/imx/sm.h b/include/linux/firmware/imx/sm.h new file mode 100644 index 000000000000..daad4bdf7d1c --- /dev/null +++ b/include/linux/firmware/imx/sm.h @@ -0,0 +1,33 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * Copyright 2024 NXP + */ + +#ifndef _SCMI_IMX_H +#define _SCMI_IMX_H + +#include +#include + +#define SCMI_IMX_CTRL_PDM_CLK_SEL 0 /* AON PDM clock sel */ +#define SCMI_IMX_CTRL_MQS1_SETTINGS 1 /* AON MQS settings */ +#define SCMI_IMX_CTRL_SAI1_MCLK 2 /* AON SAI1 MCLK */ +#define SCMI_IMX_CTRL_SAI3_MCLK 3 /* WAKE SAI3 MCLK */ +#define SCMI_IMX_CTRL_SAI4_MCLK 4 /* WAKE SAI4 MCLK */ +#define SCMI_IMX_CTRL_SAI5_MCLK 5 /* WAKE SAI5 MCLK */ + +#if IS_ENABLED(CONFIG_IMX_SCMI_MISC_EXT) +int scmi_imx_misc_ctrl_get(u32 id, u32 *num, u32 *val); +int scmi_imx_misc_ctrl_set(u32 id, u32 val); +#else +static inline int scmi_imx_misc_ctrl_get(u32 id, u32 *num, u32 *val) +{ + return -EOPNOTSUPP; +} + +static inline int scmi_imx_misc_ctrl_set(u32 id, u32 val); +{ + return -EOPNOTSUPP; +} +#endif +#endif