From: Peng Fan Date: Tue, 8 Apr 2025 08:44:29 +0000 (+0800) Subject: firmware: imx: Add i.MX95 SCMI LMM driver X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=7242bbf418f0521c0e3dd7034b7b3cc4413d7d5a;p=users%2Fdwmw2%2Flinux.git firmware: imx: Add i.MX95 SCMI LMM driver The i.MX95 System manager exports SCMI LMM protocol for linux to manage Logical Machines. The driver is to use the LMM Protocol interface to boot, shutdown a LM. Reviewed-by: Cristian Marussi Signed-off-by: Peng Fan Message-Id: <20250408-imx-lmm-cpu-v4-5-4c5f4a456e49@nxp.com> Signed-off-by: Sudeep Holla --- diff --git a/drivers/firmware/arm_scmi/vendors/imx/Kconfig b/drivers/firmware/arm_scmi/vendors/imx/Kconfig index b5f13d0e40155..0a396d3626287 100644 --- a/drivers/firmware/arm_scmi/vendors/imx/Kconfig +++ b/drivers/firmware/arm_scmi/vendors/imx/Kconfig @@ -26,6 +26,7 @@ config IMX_SCMI_CPU_EXT config IMX_SCMI_LMM_EXT tristate "i.MX SCMI LMM EXTENSION" depends on ARM_SCMI_PROTOCOL || (COMPILE_TEST && OF) + depends on IMX_SCMI_LMM_DRV default y if ARCH_MXC help This enables i.MX System Logical Machine Protocol to diff --git a/drivers/firmware/imx/Kconfig b/drivers/firmware/imx/Kconfig index c964f4924359f..cd4bf996fe612 100644 --- a/drivers/firmware/imx/Kconfig +++ b/drivers/firmware/imx/Kconfig @@ -23,6 +23,17 @@ config IMX_SCU This driver manages the IPC interface between host CPU and the SCU firmware running on M4. +config IMX_SCMI_LMM_DRV + tristate "IMX SCMI LMM Protocol driver" + depends on ARCH_MXC || 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 Logical Machine management features. + + This driver can also be built as a module. + config IMX_SCMI_MISC_DRV tristate "IMX SCMI MISC Protocol driver" depends on ARCH_MXC || COMPILE_TEST diff --git a/drivers/firmware/imx/Makefile b/drivers/firmware/imx/Makefile index 8d046c341be87..7762855d2a771 100644 --- a/drivers/firmware/imx/Makefile +++ b/drivers/firmware/imx/Makefile @@ -2,3 +2,4 @@ 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-${CONFIG_IMX_SCMI_MISC_DRV} += sm-misc.o +obj-${CONFIG_IMX_SCMI_LMM_DRV} += sm-lmm.o diff --git a/drivers/firmware/imx/sm-lmm.c b/drivers/firmware/imx/sm-lmm.c new file mode 100644 index 0000000000000..6807bf563c03d --- /dev/null +++ b/drivers/firmware/imx/sm-lmm.c @@ -0,0 +1,91 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright 2025 NXP + */ + +#include +#include +#include +#include +#include +#include + +static const struct scmi_imx_lmm_proto_ops *imx_lmm_ops; +static struct scmi_protocol_handle *ph; + +int scmi_imx_lmm_info(u32 lmid, struct scmi_imx_lmm_info *info) +{ + if (!ph) + return -EPROBE_DEFER; + + if (!info) + return -EINVAL; + + return imx_lmm_ops->lmm_info(ph, lmid, info); +}; +EXPORT_SYMBOL(scmi_imx_lmm_info); + +int scmi_imx_lmm_reset_vector_set(u32 lmid, u32 cpuid, u32 flags, u64 vector) +{ + if (!ph) + return -EPROBE_DEFER; + + return imx_lmm_ops->lmm_reset_vector_set(ph, lmid, cpuid, flags, vector); +} +EXPORT_SYMBOL(scmi_imx_lmm_reset_vector_set); + +int scmi_imx_lmm_operation(u32 lmid, enum scmi_imx_lmm_op op, u32 flags) +{ + if (!ph) + return -EPROBE_DEFER; + + switch (op) { + case SCMI_IMX_LMM_BOOT: + return imx_lmm_ops->lmm_power_boot(ph, lmid, true); + case SCMI_IMX_LMM_POWER_ON: + return imx_lmm_ops->lmm_power_boot(ph, lmid, false); + case SCMI_IMX_LMM_SHUTDOWN: + return imx_lmm_ops->lmm_shutdown(ph, lmid, flags); + default: + break; + } + + return -EINVAL; +} +EXPORT_SYMBOL(scmi_imx_lmm_operation); + +static int scmi_imx_lmm_probe(struct scmi_device *sdev) +{ + const struct scmi_handle *handle = sdev->handle; + + if (!handle) + return -ENODEV; + + if (imx_lmm_ops) { + dev_err(&sdev->dev, "lmm already initialized\n"); + return -EEXIST; + } + + imx_lmm_ops = handle->devm_protocol_get(sdev, SCMI_PROTOCOL_IMX_LMM, &ph); + if (IS_ERR(imx_lmm_ops)) + return PTR_ERR(imx_lmm_ops); + + return 0; +} + +static const struct scmi_device_id scmi_id_table[] = { + { SCMI_PROTOCOL_IMX_LMM, "imx-lmm" }, + { }, +}; +MODULE_DEVICE_TABLE(scmi, scmi_id_table); + +static struct scmi_driver scmi_imx_lmm_driver = { + .name = "scmi-imx-lmm", + .probe = scmi_imx_lmm_probe, + .id_table = scmi_id_table, +}; +module_scmi_driver(scmi_imx_lmm_driver); + +MODULE_AUTHOR("Peng Fan "); +MODULE_DESCRIPTION("IMX SM LMM driver"); +MODULE_LICENSE("GPL"); diff --git a/include/linux/firmware/imx/sm.h b/include/linux/firmware/imx/sm.h index 9b85a3f028d1b..bc27b04afb2f6 100644 --- a/include/linux/firmware/imx/sm.h +++ b/include/linux/firmware/imx/sm.h @@ -8,6 +8,7 @@ #include #include +#include #include #define SCMI_IMX_CTRL_PDM_CLK_SEL 0 /* AON PDM clock sel */ @@ -20,4 +21,17 @@ int scmi_imx_misc_ctrl_get(u32 id, u32 *num, u32 *val); int scmi_imx_misc_ctrl_set(u32 id, u32 val); +enum scmi_imx_lmm_op { + SCMI_IMX_LMM_BOOT, + SCMI_IMX_LMM_POWER_ON, + SCMI_IMX_LMM_SHUTDOWN, +}; + +/* For shutdown pperation */ +#define SCMI_IMX_LMM_OP_FORCEFUL 0 +#define SCMI_IMX_LMM_OP_GRACEFUL BIT(0) + +int scmi_imx_lmm_operation(u32 lmid, enum scmi_imx_lmm_op op, u32 flags); +int scmi_imx_lmm_info(u32 lmid, struct scmi_imx_lmm_info *info); +int scmi_imx_lmm_reset_vector_set(u32 lmid, u32 cpuid, u32 flags, u64 vector); #endif