Merge "slimbus: Provide framer-booted notification to slimbus device drivers" (e5421545) · Commits · e / devices / android_kernel_sony_msm8994

drivers/slimbus/slim-msm-ngd.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -1047,6 +1047,7 @@ static void ngd_laddr_lookup(struct work_struct *work)
		struct slim_controller *ctrl = &dev->ctrl;
		struct slim_device *sbdev;
		int i;
		slim_framer_booted(ctrl);
		mutex_lock(&ctrl->m_ctrl);
		list_for_each_entry(sbdev, &ctrl->devs, dev_list) {
		int ret = 0;

drivers/slimbus/slimbus.c

+30 −0

Original line number	Diff line number	Diff line
		@@ -637,6 +637,36 @@ void slim_report_absent(struct slim_device *sbdev)
		}
		EXPORT_SYMBOL(slim_report_absent);

		/*
		* slim_framer_booted: This function is called by controller after the active
		* framer has booted (using Bus Reset sequence, or after it has shutdown and has
		* come back up). Components, devices on the bus may be in undefined state,
		* and this function triggers their drivers to do the needful
		* to bring them back in Reset state so that they can acquire sync, report
		* present and be operational again.
		*/
		void slim_framer_booted(struct slim_controller *ctrl)
		{
		struct slim_device *sbdev;
		struct list_head pos, next;
		if (!ctrl)
		return;
		mutex_lock(&ctrl->m_ctrl);
		list_for_each_safe(pos, next, &ctrl->devs) {
		struct slim_driver *sbdrv;
		sbdev = list_entry(pos, struct slim_device, dev_list);
		mutex_unlock(&ctrl->m_ctrl);
		if (sbdev && sbdev->dev.driver) {
		sbdrv = to_slim_driver(sbdev->dev.driver);
		if (sbdrv->reset_device)
		sbdrv->reset_device(sbdev);
		}
		mutex_lock(&ctrl->m_ctrl);
		}
		mutex_unlock(&ctrl->m_ctrl);
		}
		EXPORT_SYMBOL(slim_framer_booted);

		/*
		* slim_msg_response: Deliver Message response received from a device to the
		* framework.

include/linux/slimbus/slimbus.h

+15 −0

Original line number	Diff line number	Diff line
		@@ -586,6 +586,9 @@ struct slim_controller {
		* @device_down: This callback is called when device reports absent, or the
		* bus goes down. Device will report present when bus is up and
		* device_up callback will be called again when that happens
		* @reset_device: This callback is called after framer is booted.
		* Driver should do the needful to reset the device,
		* so that device acquires sync and be operational.
		* @driver: Slimbus device drivers should initialize name and owner field of
		* this structure
		* @id_table: List of slimbus devices supported by this driver
		@@ -600,6 +603,8 @@ struct slim_driver {
		int (device_up)(struct slim_device sldev);
		int (*device_down)
		(struct slim_device *sldev);
		int (*reset_device)
		(struct slim_device *sldev);

		struct device_driver driver;
		const struct slim_device_id *id_table;
		@@ -1035,6 +1040,16 @@ extern int slim_assign_laddr(struct slim_controller ctrl, const u8 e_addr,
		*/
		void slim_report_absent(struct slim_device *sbdev);

		/*
		* slim_framer_booted: This function is called by controller after the active
		* framer has booted (using Bus Reset sequence, or after it has shutdown and has
		* come back up). Components, devices on the bus may be in undefined state,
		* and this function triggers their drivers to do the needful
		* to bring them back in Reset state so that they can acquire sync, report
		* present and be operational again.
		*/
		void slim_framer_booted(struct slim_controller *ctrl);

		/*
		* slim_msg_response: Deliver Message response received from a device to the
		* framework.