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authorLinus Torvalds <torvalds@linux-foundation.org>2026-08-24 08:46:03 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2026-08-24 08:46:03 -0700
commitcf9610f9116d55c5a66ef9f1faecacabd93a9322 (patch)
tree757a3d280760c654767631cab5ad8af2d86d1848 /include/sound/timer.h
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Merge tag 'pinctrl-v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrlgrafted
Pull pin control updates from Linus Walleij: "Core changes: - Use the non-blocking mux_state_try_select() in the generic MUX pin control back-end - Free pin maps on pinctrl_generic_to_map() failure in the core helpers New hardware pin control: - Qualcomm Maili TLMM SoC, PMG1110 PMIC, and Eliza LPASS LPI TLMM SoC (this is for the low power audio, LPASS = Low Power Audio SubSystem portions) - Upboard support on top of the Intel pin controller - Apple T6030 and T6031 support (just compatible strings) - Samsung Exynos 8855 SoC - Mediatek MT6858 SoC - Rockchip RK3308B and RV1106 SoCs - Airoha EN7523 and AN7563 SoCs Improvements: - Qualcomm TLMM GPIOs are unconditionally marked as wakeup capable - Qualcomm improvements on top of the Qualcomm PDC (power domain controller) irqchip improvements from tglx:s tree - Qualcomm IPQ806x and IPQ9650 non-urgent pin grop fixups - The NPCM8xx driver has been put into shape fixing many pin and group definitions - Some non-urgent Tegra 264 pin assignments are fixed up - Some non-urgent fixups to Airoha AN7581 and AN7583 registers and pin assignments, missing features etc" * tag 'pinctrl-v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl: (130 commits) dt-bindings: pinctrl: Convert TI DA850 pupd to DT schema pinctrl: meson: sync some modify from A4 pinctrl: meson: a4: Add input enable pin configuration pinctrl: realtek: rtd1625: remove unused group name spdif_sel pinctrl: realtek: rtd1625: fix base_bit for VE4 GPIO 13 dt-bindings: pinctrl: microchip,pic32mzda-pinctrl: Convert to DT schema Revert "Merge branch 'ib-rsk7204' into devel" pinctrl: rockchip: Add RV1106 pinctrl support dt-bindings: pinctrl: rockchip: Add RV1106 compatible pinctrl: rockchip: Decode drive strength in the get function pinctrl: fix PINCTRL_GENERIC_MUX not always being selectable pinctrl: airoha: add support of an7563 SoC dt-bindings: pinctrl: airoha: add support of an7563 pin controller pinctrl: airoha: try to find chip scu node by phandle first pinctrl: airoha: add support of en7523 SoC dt-bindings: pinctrl: airoha: add support of en7523 pin controller pinctrl: airoha: an7583: add support for olt pinmux pinctrl: airoha: an7583: add support for pon_alt pinmux pinctrl: airoha: an7583: add support for npu_uart pinmux dt-bindings: pinctrl: airoha: an7583: add missed features ...
Diffstat (limited to 'include/sound/timer.h')
-rw-r--r--include/sound/timer.h140
1 files changed, 140 insertions, 0 deletions
diff --git a/include/sound/timer.h b/include/sound/timer.h
new file mode 100644
index 000000000..e549eab71
--- /dev/null
+++ b/include/sound/timer.h
@@ -0,0 +1,140 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+#ifndef __SOUND_TIMER_H
+#define __SOUND_TIMER_H
+
+/*
+ * Timer abstract layer
+ * Copyright (c) by Jaroslav Kysela <perex@perex.cz>,
+ * Abramo Bagnara <abramo@alsa-project.org>
+ */
+
+#include <sound/asound.h>
+#include <linux/interrupt.h>
+
+#define snd_timer_chip(timer) ((timer)->private_data)
+
+#define SNDRV_TIMER_DEVICES 16
+
+#define SNDRV_TIMER_DEV_FLG_PCM 0x10000000
+
+#define SNDRV_TIMER_HW_AUTO 0x00000001 /* auto trigger is supported */
+#define SNDRV_TIMER_HW_STOP 0x00000002 /* call stop before start */
+#define SNDRV_TIMER_HW_SLAVE 0x00000004 /* only slave timer (variable resolution) */
+#define SNDRV_TIMER_HW_FIRST 0x00000008 /* first tick can be incomplete */
+#define SNDRV_TIMER_HW_WORK 0x00000010 /* timer is called from work */
+
+#define SNDRV_TIMER_IFLG_SLAVE 0x00000001
+#define SNDRV_TIMER_IFLG_RUNNING 0x00000002
+#define SNDRV_TIMER_IFLG_START 0x00000004
+#define SNDRV_TIMER_IFLG_AUTO 0x00000008 /* auto restart */
+#define SNDRV_TIMER_IFLG_FAST 0x00000010 /* fast callback (do not use work) */
+#define SNDRV_TIMER_IFLG_CALLBACK 0x00000020 /* timer callback is active */
+#define SNDRV_TIMER_IFLG_EXCLUSIVE 0x00000040 /* exclusive owner - no more instances */
+#define SNDRV_TIMER_IFLG_EARLY_EVENT 0x00000080 /* write early event to the poll queue */
+
+#define SNDRV_TIMER_FLG_CHANGE 0x00000001
+#define SNDRV_TIMER_FLG_RESCHED 0x00000002 /* need reschedule */
+
+struct snd_timer;
+
+struct snd_timer_hardware {
+ /* -- must be filled with low-level driver */
+ unsigned int flags; /* various flags */
+ unsigned long resolution; /* average timer resolution for one tick in nsec */
+ unsigned long resolution_min; /* minimal resolution */
+ unsigned long resolution_max; /* maximal resolution */
+ unsigned long ticks; /* max timer ticks per interrupt */
+ /* -- low-level functions -- */
+ int (*open) (struct snd_timer * timer);
+ int (*close) (struct snd_timer * timer);
+ unsigned long (*c_resolution) (struct snd_timer * timer);
+ int (*start) (struct snd_timer * timer);
+ int (*stop) (struct snd_timer * timer);
+ int (*set_period) (struct snd_timer * timer, unsigned long period_num, unsigned long period_den);
+ int (*precise_resolution) (struct snd_timer * timer, unsigned long *num, unsigned long *den);
+};
+
+struct snd_timer {
+ int tmr_class;
+ struct snd_card *card;
+ struct module *module;
+ int tmr_device;
+ int tmr_subdevice;
+ char id[64];
+ char name[80];
+ unsigned int flags;
+ int running; /* running instances */
+ unsigned long sticks; /* schedule ticks */
+ void *private_data;
+ void (*private_free) (struct snd_timer *timer);
+ struct snd_timer_hardware hw;
+ spinlock_t lock;
+ struct list_head device_list;
+ struct list_head open_list_head;
+ struct list_head active_list_head;
+ struct list_head ack_list_head;
+ struct list_head sack_list_head; /* slow ack list head */
+ struct work_struct task_work;
+ struct kref kref;
+ int max_instances; /* upper limit of timer instances */
+ int num_instances; /* current number of timer instances */
+};
+
+struct snd_timer_instance {
+ struct snd_timer *timer;
+ char *owner;
+ unsigned int flags;
+ void *private_data;
+ void (*private_free) (struct snd_timer_instance *ti);
+ void (*callback) (struct snd_timer_instance *timeri,
+ unsigned long ticks, unsigned long resolution);
+ void (*ccallback) (struct snd_timer_instance * timeri,
+ int event,
+ struct timespec64 * tstamp,
+ unsigned long resolution);
+ void (*disconnect)(struct snd_timer_instance *timeri);
+ void *callback_data;
+ unsigned long ticks; /* auto-load ticks when expired */
+ unsigned long cticks; /* current ticks */
+ unsigned long pticks; /* accumulated ticks for callback */
+ unsigned long resolution; /* current resolution for work */
+ unsigned long lost; /* lost ticks */
+ int slave_class;
+ unsigned int slave_id;
+ struct list_head open_list;
+ struct list_head active_list;
+ struct list_head master_list;
+ struct list_head ack_list;
+ struct list_head slave_list_head;
+ struct list_head slave_active_head;
+ struct snd_timer_instance *master;
+};
+
+/*
+ * Registering
+ */
+
+int snd_timer_new(struct snd_card *card, char *id, struct snd_timer_id *tid, struct snd_timer **rtimer);
+void snd_timer_notify(struct snd_timer *timer, int event, struct timespec64 *tstamp);
+int snd_timer_global_new(char *id, int device, struct snd_timer **rtimer);
+int snd_timer_global_free(struct snd_timer *timer);
+int snd_timer_global_register(struct snd_timer *timer);
+
+struct snd_timer_instance *snd_timer_instance_new(const char *owner);
+void snd_timer_instance_free(struct snd_timer_instance *timeri);
+int snd_timer_open(struct snd_timer_instance *timeri, struct snd_timer_id *tid, unsigned int slave_id);
+void snd_timer_close(struct snd_timer_instance *timeri);
+unsigned long snd_timer_resolution(struct snd_timer_instance *timeri);
+int snd_timer_start(struct snd_timer_instance *timeri, unsigned int ticks);
+int snd_timer_stop(struct snd_timer_instance *timeri);
+int snd_timer_continue(struct snd_timer_instance *timeri);
+int snd_timer_pause(struct snd_timer_instance *timeri);
+
+void snd_timer_interrupt(struct snd_timer *timer, unsigned long ticks_left);
+
+struct snd_timer *snd_timeri_timer_get(struct snd_timer_instance *timeri);
+void snd_timeri_timer_put(struct snd_timer *timer);
+
+DEFINE_FREE(snd_timeri_timer, struct snd_timer *, if (_T) snd_timeri_timer_put(_T))
+
+#endif /* __SOUND_TIMER_H */