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Mon, 19 May 2025 10:16:16 -0700 (PDT) Received: from hiagof-nb.corp.toradex.com ([67.159.246.222]) by smtp.gmail.com with ESMTPSA id 71dfb90a1353d-52dbab4e983sm7003647e0c.31.2025.05.19.10.16.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 19 May 2025 10:16:15 -0700 (PDT) From: Hiago De Franco To: Mathieu Poirier , Ulf Hansson , linux-pm@vger.kernel.org, linux-remoteproc@vger.kernel.org Cc: Shawn Guo , Sascha Hauer , Bjorn Andersson , Hiago De Franco , imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Peng Fan , daniel.baluta@nxp.com, iuliana.prodan@oss.nxp.com, Fabio Estevam , Pengutronix Kernel Team , Peng Fan Subject: [PATCH v3 1/3] firmware: imx: introduce imx_sc_pm_get_resource_power_mode() Date: Mon, 19 May 2025 14:15:12 -0300 Message-Id: <20250519171514.61974-2-hiagofranco@gmail.com> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20250519171514.61974-1-hiagofranco@gmail.com> References: <20250519171514.61974-1-hiagofranco@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250519_101629_010513_BE265FEC X-CRM114-Status: GOOD ( 21.12 ) 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 From: Hiago De Franco This SCU API returns the power mode of a given resource. As example, remoteproc/imx_rproc.c can now use this function to check the power mode of the remote core to properly set "attached" or "offline" modes. Since there is no proper firmware/imx file to place this function, also introduce firmware/imx/power.c file to keep all the PM functions inside. Signed-off-by: Hiago De Franco Suggested-by: Peng Fan --- v3: New patch. --- drivers/firmware/imx/Makefile | 2 +- drivers/firmware/imx/power.c | 52 +++++++++++++++++++++++++++++ include/linux/firmware/imx/svc/pm.h | 9 +++++ 3 files changed, 62 insertions(+), 1 deletion(-) create mode 100644 drivers/firmware/imx/power.c diff --git a/drivers/firmware/imx/Makefile b/drivers/firmware/imx/Makefile index 8d046c341be8..5f5548e34459 100644 --- a/drivers/firmware/imx/Makefile +++ b/drivers/firmware/imx/Makefile @@ -1,4 +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-$(CONFIG_IMX_SCU) += imx-scu.o misc.o imx-scu-irq.o rm.o imx-scu-soc.o power.o obj-${CONFIG_IMX_SCMI_MISC_DRV} += sm-misc.o diff --git a/drivers/firmware/imx/power.c b/drivers/firmware/imx/power.c new file mode 100644 index 000000000000..b982cebba72a --- /dev/null +++ b/drivers/firmware/imx/power.c @@ -0,0 +1,52 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * File containing client-side RPC functions for the PM (Power Management) + * service. These function are ported to clients that communicate to the SC. + */ + +#include + +struct imx_sc_msg_req_get_resource_power_mode { + struct imx_sc_rpc_msg hdr; + union { + struct { + u16 resource; + } req; + struct { + u8 mode; + } resp; + } data; +} __packed __aligned(4); + +/** + * imx_sc_pm_get_resource_power_mode - Get power mode from a given resource. + * @ipc: IPC handle. + * @resource: Resource to check the power mode. + * + * Return: Returns < 0 for errors or the following for success: + * * %IMX_SC_PM_PW_MODE_OFF - Power off + * * %IMX_SC_PM_PW_MODE_STBY - Power in standby + * * %IMX_SC_PM_PW_MODE_LP - Power in low-power + * * %IMX_SC_PM_PW_MODE_ON - Power on + * + */ +int imx_sc_pm_get_resource_power_mode(struct imx_sc_ipc *ipc, u32 resource) +{ + struct imx_sc_msg_req_get_resource_power_mode msg; + struct imx_sc_rpc_msg *hdr = &msg.hdr; + int ret; + + hdr->ver = IMX_SC_RPC_VERSION; + hdr->svc = IMX_SC_RPC_SVC_PM; + hdr->func = IMX_SC_PM_FUNC_GET_RESOURCE_POWER_MODE; + hdr->size = 2; + + msg.data.req.resource = resource; + + ret = imx_scu_call_rpc(ipc, &msg, true); + if (ret) + return ret; + + return msg.data.resp.mode; +} +EXPORT_SYMBOL(imx_sc_pm_get_resource_power_mode); diff --git a/include/linux/firmware/imx/svc/pm.h b/include/linux/firmware/imx/svc/pm.h index 1f6975dd37b0..56e93a953295 100644 --- a/include/linux/firmware/imx/svc/pm.h +++ b/include/linux/firmware/imx/svc/pm.h @@ -82,4 +82,13 @@ enum imx_sc_pm_func { #define IMX_SC_PM_PARENT_PLL2 3 /* Parent in PLL2 or PLL0/4 */ #define IMX_SC_PM_PARENT_BYPS 4 /* Parent is a bypass clock. */ +#if IS_ENABLED(CONFIG_IMX_SCU) +int imx_sc_pm_get_resource_power_mode(struct imx_sc_ipc *ipc, u32 resource); +#else +static inline int imx_sc_pm_get_resource_power_mode(struct imx_sc_ipc *ipc, + u32 resource) +{ + return -EOPNOTSUPP; +} +#endif #endif /* _SC_PM_API_H */ -- 2.39.5