diff options
| author | Huang, Tao <huangtao@rock-chips.com> | 2017-07-26 19:32:04 +0800 |
|---|---|---|
| committer | Huang, Tao <huangtao@rock-chips.com> | 2017-07-26 19:32:04 +0800 |
| commit | 6ee6d6d68b2acb6de8590f8ff7c25cc35b2aefca (patch) | |
| tree | 5296301feef05188af3f37567d0f15300d36fee0 /drivers/hid/i2c-hid | |
| parent | 8ccefa5de2391e13748dae27407f71953da999da (diff) | |
| parent | 16e243013beb93902693c4bb90e4348c99588429 (diff) | |
Merge tag 'lsk-v4.4-17.07-android' of git://git.linaro.org/kernel/linux-linaro-stable.git
LSK 17.07 v4.4-android
* tag 'lsk-v4.4-17.07-android': (402 commits)
dt/vendor-prefixes: remove redundant vendor
Linux 4.4.77
saa7134: fix warm Medion 7134 EEPROM read
x86/mm/pat: Don't report PAT on CPUs that don't support it
ext4: check return value of kstrtoull correctly in reserved_clusters_store
staging: comedi: fix clean-up of comedi_class in comedi_init()
staging: vt6556: vnt_start Fix missing call to vnt_key_init_table.
tcp: fix tcp_mark_head_lost to check skb len before fragmenting
md: fix super_offset endianness in super_1_rdev_size_change
md: fix incorrect use of lexx_to_cpu in does_sb_need_changing
perf tools: Use readdir() instead of deprecated readdir_r() again
perf tests: Remove wrong semicolon in while loop in CQM test
perf trace: Do not process PERF_RECORD_LOST twice
perf dwarf: Guard !x86_64 definitions under #ifdef else clause
perf pmu: Fix misleadingly indented assignment (whitespace)
perf annotate browser: Fix behaviour of Shift-Tab with nothing focussed
perf tools: Remove duplicate const qualifier
perf script: Use readdir() instead of deprecated readdir_r()
perf thread_map: Use readdir() instead of deprecated readdir_r()
perf tools: Use readdir() instead of deprecated readdir_r()
...
Conflicts:
Makefile
drivers/Kconfig
drivers/Makefile
drivers/usb/dwc3/gadget.c
Change-Id: Ib4aae2e34ebbf0d7953c748a33f673acb3e744fc
Diffstat (limited to 'drivers/hid/i2c-hid')
| -rw-r--r-- | drivers/hid/i2c-hid/i2c-hid.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/hid/i2c-hid/i2c-hid.c b/drivers/hid/i2c-hid/i2c-hid.c index ba096a4d1060..3ae11cdfc67a 100644 --- a/drivers/hid/i2c-hid/i2c-hid.c +++ b/drivers/hid/i2c-hid/i2c-hid.c @@ -399,6 +399,15 @@ static int i2c_hid_hwreset(struct i2c_client *client) if (ret) return ret; + /* + * The HID over I2C specification states that if a DEVICE needs time + * after the PWR_ON request, it should utilise CLOCK stretching. + * However, it has been observered that the Windows driver provides a + * 1ms sleep between the PWR_ON and RESET requests and that some devices + * rely on this. + */ + usleep_range(1000, 5000); + i2c_hid_dbg(ihid, "resetting...\n"); ret = i2c_hid_command(client, &hid_reset_cmd, NULL, 0); |