Hi Heiko,
On 2016/6/15 17:04, Heiko Stübner wrote:
Hi Frank,
Am Mittwoch, 15. Juni 2016, 11:23:26 schrieb Frank Wang:
On 2016/6/14 21:27, Heiko Stübner wrote:
Am Montag, 13. Juni 2016, 10:10:10 schrieb Frank Wang:
The newer SoCs (rk3366, rk3399) take a different usb-phy IP block
than rk3288 and before, and most of phy-related registers are also
different from the past, so a new phy driver is required necessarily.
Signed-off-by: Frank Wang <frank.wang@xxxxxxxxxxxxxx>
---
Changes in v5:
- Added 'reg' in the data block to match the different phy-blocks in
dt.
Changes in v4:
- Removed some processes related to 'vbus_host-supply'.
Changes in v3:
- Resolved the mapping defect between fixed value in driver and the
property in devicetree.
- Optimized 480m output clock register function.
- Code cleanup.
Changes in v2:
- Changed vbus_host operation from gpio to regulator in *_probe.
- Improved the fault treatment relate to 480m clock register.
- Cleaned up some meaningless codes in *_clk480m_disable.
- made more clear the comment of *_sm_work.
drivers/phy/Kconfig | 7 +
drivers/phy/Makefile | 1 +
drivers/phy/phy-rockchip-inno-usb2.c | 645
++++++++++++++++++++++++++++++++++ 3 files changed, 653 insertions(+)
[...]
+
+static int rockchip_usb2phy_exit(struct phy *phy)
+{
+ struct rockchip_usb2phy_port *rport = phy_get_drvdata(phy);
+
if (!rport->port_cfg)
return 0;
+ if (rport->port_id == USB2PHY_PORT_HOST)
+ cancel_delayed_work_sync(&rport->sm_work);
+
you will also need to resume the port here, if it is suspended at this
point, as phy_power_off gets called after phy_exit and would probably
produce clk enable/disable mismatches otherwise.
Hmm, from my personal point of view, when canceling sm_work here, it may
not cause the port goes to suspend, isn't it? besides, clk only prepared
in *_usb2phy_resume(), and unprepared in *_usb2phy_suspend(), so if we
resume port here, the prepare_count of clk will be increased again, I
am afraid this is not correct, and am I wrong? would you like to tell me
more details?
usb2phy_resume gets called both initially through phy_power_on as well.
So it's on but through the first scheduled work call, might get suspended when
nothing is connected. (clk_enable and clk_disable will run).
If nothing is connected on unload phy_power_off will get called while the
clock actually is still disabled.
So I think it's either resuming on exit, or at least making sure to do nothing
in that case in the phy_power_off callback of the driver.
Well, I got what you mean. I saw phy_power_on() gets called twice at
ehci/ohci driver probe time, one is at pdata->power_on(); another is at
usb_add_hcd(), so after that, the power_count of phy increases to two.
however, when ehci/ohci driver goes to suspend, there is only once to
call phy_power_off(), and the power_count of phy decreases to 1, so our
usb2phy_resume() could not be invoked :-) .
If so, is it still need to care it? How about use suspended member of
rockchip_usb2phy_port as a conditional to check in *_usb2phy_suspend(),
if necessary.
BR.
Frank
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