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| author | Robert Hancock <robert.hancock@calian.com> | 2021-03-25 20:26:36 +0100 |
|---|---|---|
| committer | Stephen Boyd <sboyd@kernel.org> | 2021-06-28 04:58:14 +0200 |
| commit | 6e7d2de1e000d36990923ed80d2e78dfcb545cee (patch) | |
| tree | ce46b57cb82ef401c2283258d61c5489f098a69f /net | |
| parent | dt-bindings: clock: clk-si5341: Add new attributes (diff) | |
| download | linux-6e7d2de1e000d36990923ed80d2e78dfcb545cee.tar.xz linux-6e7d2de1e000d36990923ed80d2e78dfcb545cee.zip | |
clk: si5341: Wait for DEVICE_READY on startup
The Si5341 datasheet warns that before accessing any other registers,
including the PAGE register, we need to wait for the DEVICE_READY register
to indicate the device is ready, or the process of the device loading its
state from NVM can be corrupted. Wait for DEVICE_READY on startup before
continuing initialization. This is done using a raw I2C register read
prior to setting up regmap to avoid any potential unwanted automatic PAGE
register accesses from regmap at this stage.
Fixes: 3044a860fd ("clk: Add Si5341/Si5340 driver")
Signed-off-by: Robert Hancock <robert.hancock@calian.com>
Link: https://lore.kernel.org/r/20210325192643.2190069-3-robert.hancock@calian.com
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Diffstat (limited to 'net')
0 files changed, 0 insertions, 0 deletions