kernel/linux.git/drivers/firmware/imx, branch v6.19.11

firmware: imx: scu: Use devm_mutex_init

2025-10-27T06:43:48+00:00

In normal case, there is no need to invoke mutex_destroy in error path, but it is useful when CONFIG_DEBUG_MUTEXES, so use devm_mutex_init(). Reviewed-by: Frank Li Signed-off-by: Peng Fan Signed-off-by: Shawn Guo

firmware: imx: scu: Suppress bind attrs

2025-10-27T06:43:47+00:00

The SCU driver is critical for system working properly, it should never be removed and binded again. So suppress the bind attrs Reviewed-by: Frank Li Signed-off-by: Peng Fan Signed-off-by: Shawn Guo

firmware: imx: scu: Update error code

2025-10-27T06:43:47+00:00

IMX_SC_ERR_NOTFOUND should map with -ENOENT, not -EEXIST. -ENODEV makes more sense for IMX_SC_ERR_NOPOWER, and -ECOMM makes more sense for IMX_SC_ERR_IPC. Reviewed-by: Frank Li Signed-off-by: Peng Fan Signed-off-by: Shawn Guo

firmware: imx: scu-irq: Remove unused export of imx_scu_enable_general_irq_channel

2025-10-27T06:43:47+00:00

Since its introduction, this symbol has not been used by any loadable modules. It remains only referenced within imx-scu.c, which is always built together with imx-scu-irq.c As such, exporting imx_scu_enable_general_irq_channel is unnecessary, so remove the export. Reviewed-by: Frank Li Signed-off-by: Peng Fan Signed-off-by: Shawn Guo

firmware: imx: scu-irq: Set mu_resource_id before get handle

2025-10-27T06:43:47+00:00

mu_resource_id is referenced in imx_scu_irq_get_status() and imx_scu_irq_group_enable() which could be used by other modules, so need to set correct value before using imx_sc_irq_ipc_handle in SCU API call. Reviewed-by: Frank Li Signed-off-by: Peng Fan Signed-off-by: Shawn Guo

firmware: imx: scu-irq: Init workqueue before request mbox channel

2025-10-27T06:43:47+00:00

With mailbox channel requested, there is possibility that interrupts may come in, so need to make sure the workqueue is initialized before the queue is scheduled by mailbox rx callback. Reviewed-by: Frank Li Signed-off-by: Peng Fan Signed-off-by: Shawn Guo

firmware: imx: scu-irq: Free mailbox client on failure at imx_scu_enable_general_irq_channel()

2025-10-27T06:43:47+00:00

The IRQ mailbox is an optional channel and does not need to be kept until driver removal when an error occurs. Free the allocated memory in the error path. Add 'goto free_cl' when mbox_request_channel_byname() fails, to keep free at one place. Signed-off-by: Peng Fan Reviewed-by: Frank Li Signed-off-by: Shawn Guo

firmware: imx: scu-irq: fix OF node leak in

2025-10-27T06:43:47+00:00

imx_scu_enable_general_irq_channel() calls of_parse_phandle_with_args(), but does not release the OF node reference. Add a of_node_put() call to release the reference. Fixes: 851826c7566e ("firmware: imx: enable imx scu general irq function") Reviewed-by: Frank Li Signed-off-by: Peng Fan Signed-off-by: Shawn Guo

firmware: imx: Add i.MX95 SCMI CPU driver

2025-04-14T12:55:04+00:00

The i.MX95 System manager exports SCMI CPU protocol for linux to manage cpu cores. The driver is to use the cpu Protocol interface to start, stop a cpu cores (eg, M7). Reviewed-by: Cristian Marussi Signed-off-by: Peng Fan Message-Id: <20250408-imx-lmm-cpu-v4-6-4c5f4a456e49@nxp.com> Signed-off-by: Sudeep Holla

firmware: imx: Add i.MX95 SCMI LMM driver

2025-04-14T12:55:04+00:00

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