Merge "SoC: soundwire: Add support for device wakeup" (02358ac5) · Commits · e / devices / android_kernel_fairphone_FP4

include/soc/soundwire.h

+6 −0

Original line number	Diff line number	Diff line
		@@ -167,6 +167,8 @@ struct swr_master {
		u8 *dev_num);
		int (slvdev_datapath_control)(struct swr_master mstr, bool enable);
		bool (remove_from_group)(struct swr_master mstr);
		void (device_wakeup_vote)(struct swr_master mstr);
		void (device_wakeup_unvote)(struct swr_master mstr);
		u16 port_en_mask;

		};
		@@ -334,4 +336,8 @@ extern void swr_remove_device(struct swr_device *swr_dev);

		extern struct swr_device get_matching_swr_slave_device(struct device_node np);

		extern int swr_device_wakeup_vote(struct swr_device *dev);

		extern int swr_device_wakeup_unvote(struct swr_device *dev);

		#endif /* _LINUX_SOUNDWIRE_H */

+55 −0

Original line number	Diff line number	Diff line
		@@ -482,6 +482,61 @@ int swr_get_logical_dev_num(struct swr_device *dev, u64 dev_id,
		}
		EXPORT_SYMBOL(swr_get_logical_dev_num);

		/**
		* swr_device_wakeup_vote - Wakeup master and slave devices from clock stop
		* @dev: pointer to soundwire slave device
		*
		* This API will wake up soundwire master and slave device(s) from
		* clock stop.
		*/
		int swr_device_wakeup_vote(struct swr_device *dev)
		{
		int ret = 0;
		struct swr_master *master = dev->master;

		if (!master) {
		pr_err("%s: Master is NULL\n", __func__);
		return -EINVAL;
		}
		mutex_lock(&master->mlock);
		if (master->device_wakeup_vote)
		master->device_wakeup_vote(master);
		else
		ret = -EINVAL;
		mutex_unlock(&master->mlock);

		return ret;
		}
		EXPORT_SYMBOL(swr_device_wakeup_vote);

		/**
		* swr_device_wakeup_unvote - Unvote Wakeup so that master and slave
		* devices can go back to clock stop
		* @dev: pointer to soundwire slave device
		*
		* This API will remove vote for wakeup so that soundwire master and
		* slave device(s) can go back to clock stop.
		*/
		int swr_device_wakeup_unvote(struct swr_device *dev)
		{
		int ret = 0;
		struct swr_master *master = dev->master;

		if (!master) {
		pr_err("%s: Master is NULL\n", __func__);
		return -EINVAL;
		}
		mutex_lock(&master->mlock);
		if (master->device_wakeup_unvote)
		master->device_wakeup_unvote(master);
		else
		ret = -EINVAL;
		mutex_unlock(&master->mlock);

		return ret;
		}
		EXPORT_SYMBOL(swr_device_wakeup_unvote);

		/**
		* swr_read - read soundwire slave device registers
		* @dev: pointer to soundwire slave device