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/linux/drivers/rtc/
H A Drtc-ds1685.c35 * Standard read/write
40 * ds1685_read - read a value from an rtc register.
42 * @reg: the register address to read.
66 * Indirect read/write functions
71 * ds1685_indirect_read - read a value from an rtc register.
73 * @reg: the register address to read.
162 (rtc->read(rtc, RTC_CTRL_A) & ~(RTC_CTRL_A_DV0))); in ds1685_rtc_switch_to_bank0()
173 (rtc->read(rtc, RTC_CTRL_A) | RTC_CTRL_A_DV0)); in ds1685_rtc_switch_to_bank1()
185 * is read again in a loop until INCR is inactive.
194 (rtc->read(rt in ds1685_rtc_begin_data_access()
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H A Drtc-bq4802.c26 u8 (*read)(struct bq4802 *, int); member
59 val = p->read(p, 0x0e); in bq4802_read_time()
62 tm->tm_sec = p->read(p, 0x00); in bq4802_read_time()
63 tm->tm_min = p->read(p, 0x02); in bq4802_read_time()
64 tm->tm_hour = p->read(p, 0x04); in bq4802_read_time()
65 tm->tm_mday = p->read(p, 0x06); in bq4802_read_time()
66 tm->tm_mon = p->read(p, 0x09); in bq4802_read_time()
67 tm->tm_year = p->read(p, 0x0a); in bq4802_read_time()
68 tm->tm_wday = p->read(p, 0x08); in bq4802_read_time()
69 century = p->read( in bq4802_read_time()
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/linux/Documentation/wmi/devices/
H A Dlenovo-wmi-other.rst67 [key, read] string InstanceName;
68 [read] boolean Active;
78 [key, read] string InstanceName;
79 [read] boolean Active;
81 [WmiDataId(1), read, Description(" IDs.")] uint32 IDs;
82 [WmiDataId(2), read, Description("Capability.")] uint32 Capability;
83 [WmiDataId(3), read, Description("Capability Default Value.")] uint32 DefaultValue;
88 [key, read] string InstanceName;
89 [read] boolean Active;
91 [WmiDataId(1), read, Descriptio
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H A Dmsi-wmi-platform.rst26 [WmiDataId(1), read, write, Description("16 bytes of data")] uint8 Bytes[16];
33 [WmiDataId(1), read, write, Description("32 bytes of data")] uint8 Bytes[32];
40 [key, read] string InstanceName;
41 [read] boolean Active;
43 [WmiMethodId(1), Implemented, read, write, Description("Return the contents of a package")]
46 [WmiMethodId(2), Implemented, read, write, Description("Set the contents of a package")]
49 [WmiMethodId(3), Implemented, read, write, Description("Return the contents of a package")]
52 [WmiMethodId(4), Implemented, read, write, Description("Set the contents of a package")]
55 [WmiMethodId(5), Implemented, read, write, Description("Return the contents of a package")]
58 [WmiMethodId(6), Implemented, read, writ
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H A Dlenovo-wmi-gamezone.rst75 [key, read] string InstanceName;
76 [read] boolean Active;
134 [key, read] string InstanceName;
135 [read] boolean Active;
137 [WmiDataId(1), read, Description("OC tune id.")] uint32 Tuneid;
138 [WmiDataId(2), read, Description("Default value.")] uint32 DefaultValue;
139 [WmiDataId(3), read, Description("OC Value.")] uint32 OCValue;
140 [WmiDataId(4), read, Description("Min Value.")] uint32 MinValue;
141 [WmiDataId(5), read, Description("Max Value.")] uint32 MaxValue;
142 [WmiDataId(6), read, Descriptio
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H A Dalienware-wmi.rst39 [key, read] string InstanceName;
40 [read] boolean Active;
42 [WmiMethodId(13), Implemented, read, write, Description("Return Overclocking Report.")] void Return_OverclockingReport([out] uint32 argr);
43 [WmiMethodId(14), Implemented, read, write, Description("Set OCUIBIOS Control.")] void Set_OCUIBIOSControl([in] uint32 arg2, [out] uint32 argr);
44 [WmiMethodId(15), Implemented, read, write, Description("Clear OC FailSafe Flag.")] void Clear_OCFailSafeFlag([out] uint32 argr);
45 [WmiMethodId(19), Implemented, read, write, Description("Get Fan Sensors.")] void GetFanSensors([in] uint32 arg2, [out] uint32 argr);
46 [WmiMethodId(20), Implemented, read, write, Description("Thermal Information.")] void Thermal_Information([in] uint32 arg2, [out] uint32 argr);
47 [WmiMethodId(21), Implemented, read, write, Description("Thermal Control.")] void Thermal_Control([in] uint32 arg2, [out] uint32 argr);
48 [WmiMethodId(23), Implemented, read, write, Description("MemoryOCControl.")] void MemoryOCControl([in] uint32 arg2, [out] uint32 argr);
49 [WmiMethodId(26), Implemented, read, writ
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/linux/Documentation/userspace-api/media/v4l/
H A Dfunc-read.rst4 .. _func-read:
7 V4L2 read()
13 v4l2-read - Read from a V4L2 device
22 .. c:function:: ssize_t read( int fd, void *buf, size_t count )
34 Max number of bytes to read
39 :c:func:`read()` attempts to read up to ``count`` bytes from file
42 section, see ##. If ``count`` is zero, :c:func:`read()` returns zero
45 :c:func:`read()` call will provide at most one frame (two fields)
48 By default :c:func:`read()` block
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/linux/Documentation/ABI/testing/
H A Dconfigfs-spear-pcie-gadget20 link used to enable ltssm and read its status.
21 int_type used to configure and read type of supported interrupt
23 to read no of MSI granted.
26 vendor_id used to write and read vendor id (hex)
27 device_id used to write and read device id (hex)
28 bar0_size used to write and read bar0_size
29 bar0_address used to write and read bar0 mapped area in hex.
30 bar0_rw_offset used to write and read offset of bar0 where bar0_data
31 will be written or read.
32 bar0_data used to write and read dat
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H A Dsysfs-driver-xdata17 The user can read the current PCIe link throughput generated
24 The file is read and write.
26 What: /sys/class/misc/dw-xdata-pcie.<device>/read
31 will create read TLPs frames - from the Endpoint to the Root
38 echo 1 > /sys/class/misc/dw-xdata-pcie.<device>/read
40 echo 0 > /sys/class/misc/dw-xdata-pcie.<device>/read
42 The user can read the current PCIe link throughput generated
46 cat /sys/class/misc/dw-xdata-pcie.<device>/read
49 The file is read and write.
/linux/Documentation/driver-api/mmc/
H A Dmmc-test.rst12 The framework provides a variety of tests to evaluate different aspects of the host controller and device interactions, such as read and write performance, data integrity, and error handling. These tests help ensure that the host controller drivers and devices operate correctly under various conditions.
112 To run test number 4 (Basic read with data verification):
126 This file lists all available tests. You can read this file to see the list of tests and their corresponding numbers.
143 | 2 | Basic read | Same for read |
150 | 4 | Basic read | Same for read |
156 | 6 | Multi-block read | Same for read |
162 | 8 | Power of two block reads | Same for read |
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/linux/drivers/gpu/drm/xe/
H A Dxe_devcoredump.c46 * not correspond to the state of the system when the file is read by
178 * @count: Number of bytes to read
184 * it is read directly from a pre-written buffer. For larger devcoredumps,
209 pm_needed = ss->read.size > XE_DEVCOREDUMP_CHUNK_MAX; in xe_devcoredump_read()
215 if (!ss->read.buffer) { in xe_devcoredump_read()
220 if (offset >= ss->read.size) in xe_devcoredump_read()
227 if (offset >= ss->read.chunk_position + XE_DEVCOREDUMP_CHUNK_MAX || in xe_devcoredump_read()
228 offset < ss->read.chunk_position) { in xe_devcoredump_read()
229 ss->read.chunk_position = new_chunk_position * in xe_devcoredump_read()
232 __xe_devcoredump_read(ss->read in xe_devcoredump_read()
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/linux/drivers/gpu/drm/amd/display/modules/hdcp/
H A Dhdcp_ddc.c152 static enum mod_hdcp_status read(struct mod_hdcp *hdcp, in read() function
211 status = read(hdcp, msg_id, buf + data_offset, cur_size); in read_repeatedly()
274 return read(hdcp, MOD_HDCP_MESSAGE_ID_READ_BKSV, in mod_hdcp_read_bksv()
281 return read(hdcp, MOD_HDCP_MESSAGE_ID_READ_BCAPS, in mod_hdcp_read_bcaps()
291 status = read(hdcp, MOD_HDCP_MESSAGE_ID_READ_BSTATUS, in mod_hdcp_read_bstatus()
295 status = read(hdcp, MOD_HDCP_MESSAGE_ID_READ_BSTATUS, in mod_hdcp_read_bstatus()
303 return read(hdcp, MOD_HDCP_MESSAGE_ID_READ_RI_R0, in mod_hdcp_read_r0p()
308 /* special case, reading repeatedly at the same address, don't use read() */
319 status = read(hdcp, MOD_HDCP_MESSAGE_ID_READ_KSV_FIFO, in mod_hdcp_read_ksvlist()
329 status = read(hdc in mod_hdcp_read_vp()
702 struct mod_hdcp_atomic_op_aux read = { write_stall_read_lc_fw_aux() local
740 struct mod_hdcp_atomic_op_i2c read = { write_poll_read_lc_fw_i2c() local
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/linux/Documentation/admin-guide/
H A Dufs.rst20 default value, supported as read-only
24 supported as read-write
28 supported as read-write
35 supported as read-write
39 supported as read-write
43 supported as read-only
47 supported as read-only
51 supported as read-only
55 supported as read-only
/linux/arch/parisc/kernel/
H A Dperf_asm.S91 ;* arg0 : rdr to be read
98 ;* arg0 : rdr to be read
114 ; read(shift in) the RDR.
173 ; RDR 2 read sequence
185 ; RDR 3 read sequence
197 ; RDR 4 read sequence
209 ; RDR 5 read sequence
221 ; RDR 6 read sequence
233 ; RDR 7 read sequence
245 ; RDR 8 read sequenc
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/linux/Documentation/ABI/stable/
H A Dsysfs-bus-nvmem6 This read/write attribute allows users to set read-write
7 devices as read-only and back to read-write from userspace.
11 Read returns '0' or '1' for read-write or read-only modes
23 This file allows user to read/write the raw NVMEM contents.
46 This read-only attribute allows user to read the NVMEM
/linux/Documentation/userspace-api/media/rc/
H A Dlirc-read.rst4 .. _lirc-read:
7 LIRC read()
13 lirc-read - Read from a LIRC device
22 .. c:function:: ssize_t read( int fd, void *buf, size_t count )
34 Max number of bytes to read
39 :c:func:`read()` attempts to read up to ``count`` bytes from file
41 :c:func:`read()` returns zero and has no other results. If ``count``
50 read from the chardev.
62 On success, the number of bytes read i
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/linux/Documentation/filesystems/spufs/
H A Dspufs.rst44 tem calls like read(2) or write(2), but often support only a subset of
49 All files that support the read(2) operation also support readv(2) and
57 possible operations, e.g. read access on the wbox file.
68 read(2), pread(2), write(2), pwrite(2), lseek(2)
81 The first SPU to CPU communication mailbox. This file is read-only and
82 can be read in units of 32 bits. The file can only be used in non-
86 read(2)
87 If a count smaller than four is requested, read returns -1 and
90 When data has been read successfully, four bytes are placed in
96 the first mailbox file, but can be read i
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/linux/include/trace/events/
H A Dmdio.h12 TP_PROTO(struct mii_bus *bus, char read,
15 TP_ARGS(bus, read, addr, regnum, val, err),
21 __field(char, read)
29 __entry->read = read;
36 __entry->busid, __entry->read ? "read" : "write",
/linux/drivers/crypto/inside-secure/
H A Dsafexcel_ring.c30 cdr->read = cdr->base; in safexcel_init_ring_descriptors()
67 rdr->read = rdr->base; in safexcel_init_ring_descriptors()
87 if ((ring->write == ring->read - ring->offset) || in safexcel_ring_next_cwptr()
88 (ring->read == ring->base && ring->write == ring->base_end)) in safexcel_ring_next_cwptr()
111 if ((ring->write == ring->read - ring->offset) || in safexcel_ring_next_rwptr()
112 (ring->read == ring->base && ring->write == ring->base_end)) in safexcel_ring_next_rwptr()
126 void *ptr = ring->read; in safexcel_ring_next_rptr()
128 if (ring->write == ring->read) in safexcel_ring_next_rptr()
131 if (ring->read == ring->base_end) in safexcel_ring_next_rptr()
132 ring->read in safexcel_ring_next_rptr()
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/linux/tools/testing/selftests/bpf/prog_tests/
H A Dctx_rewrite.c21 * to read and write instructions generated by
25 * - One that uses BPF_LDX_MEM to read the context field.
46 char *read; member
72 .read = "r11 = *(u8 *)($ctx + sk_buff::__mono_tc_offset);"
90 .read = "$dst = *(u32 *)($ctx + sk_buff::priority);",
95 .read = "$dst = *(u32 *)($ctx + sk_buff::mark);",
100 .read = "$dst = *(u32 *)($ctx + $(sk_buff::cb + qdisc_skb_cb::data));",
105 .read = "$dst = *(u16 *)($ctx + $(sk_buff::cb + qdisc_skb_cb::tc_classid));",
110 .read = "$dst = *(u16 *)($ctx + sk_buff::tc_index);",
115 .read
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H A Duser_ringbuf.c38 int read; in write_samples() local
50 read = snprintf(entry->comm, sizeof(entry->comm), "%u", i); in write_samples()
51 if (read <= 0) { in write_samples()
55 ASSERT_GT(read, 0, "snprintf_comm"); in write_samples()
56 err = read; in write_samples()
174 ASSERT_EQ(skel->bss->read, 0, "no_reads_after_load"); in load_skel_create_ringbufs()
210 ASSERT_EQ(skel->bss->read, 0, "num_samples_before_bad_sample"); in manually_write_test_invalid_sample()
228 ASSERT_EQ(skel->bss->read, 0, "num_samples_after_bad_sample"); in manually_write_test_invalid_sample()
293 ASSERT_EQ(skel->bss->read, 0, "num_samples_read_before"); in test_user_ringbuf_basic()
299 ASSERT_EQ(skel->bss->read, in test_user_ringbuf_basic()
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/linux/scripts/coccinelle/api/
H A Dstream_open.cocci6 // its read and write. Rationale for the conversion is to avoid deadlock in
7 // between read and write.
80 // file_operations + whether they have _any_ .read, .write, .llseek ... at all.
95 .read = read_f,
187 // XXX for simplicity require no .{read/write}_iter and no .splice_{read/write} for now.
201 // read & write
212 .read = readstream,
231 "ERROR: %s: .read() can deadlock .write(); change nonseekable_open -> stream_open to fix." % (fops,))
238 "WARNING: %s: .read() an
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/linux/Documentation/hwmon/
H A Dltc2992.rst29 The following attributes are supported. Limits are read-write,
30 all other attributes are read-only.
39 inX_min_alarm An undervoltage occurred. Cleared on read.
40 inX_max_alarm An overvoltage occurred. Cleared on read.
47 currX_min_alarm An undercurrent occurred. Cleared on read.
48 currX_max_alarm An overcurrent occurred. Cleared on read.
55 powerX_min_alarm An underpower occurred. Cleared on read.
56 powerX_max_alarm An overpower occurred. Cleared on read.
/linux/drivers/mtd/tests/
H A Dsubpagetest.c5 * Test sub-page read and write on MTD device.
119 size_t read; in verify_eraseblock() local
125 err = mtd_read(mtd, addr, subpgsize, &read, readbuf); in verify_eraseblock()
126 if (unlikely(err || read != subpgsize)) { in verify_eraseblock()
127 if (mtd_is_bitflip(err) && read == subpgsize) { in verify_eraseblock()
132 pr_err("error: read failed at %#llx\n", in verify_eraseblock()
142 pr_info("------------- read ------------------\n"); in verify_eraseblock()
152 err = mtd_read(mtd, addr, subpgsize, &read, readbuf); in verify_eraseblock()
153 if (unlikely(err || read != subpgsize)) { in verify_eraseblock()
154 if (mtd_is_bitflip(err) && read in verify_eraseblock()
180 size_t read; verify_eraseblock2() local
215 size_t read; verify_eraseblock_ff() local
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/linux/Documentation/block/
H A Dstat.rst29 read I/Os requests number of read I/Os processed
30 read merges requests number of read I/Os merged with in-queue I/O
31 read sectors sectors number of sectors read
32 read ticks milliseconds total wait time for read requests
48 read I/Os, write I/Os, discard I/0s
61 read merge
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