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phy-twl4030-usb: initialize charging-related stuff via pm_runtime 

twl4030_phy_power_on() initializes some bits which are required for
charging. As they are not set in twl4030_usb_runtime_resume()
a call to pm_runtime_get_sync() is not sufficient to enable charging.

This patch moves the initialization to twl4030_usb_runtime_resume()
so everything needed for charging is initialized upon
pm_runtime_get_sync().

That also gives improved possibilities to debug problems in that area
because the relevant parts can be checked separately. Charging can be
enabled without having the musb subsystem active.

As a side effect this hides some bugs in musb which causes
unbalanced calls to phy_power_off()/phy_power_on() so that
phy->power_count becomes -1.

The result is that e.g. the GTA04 phone (dm3730 + twl4030) works
finally as a usb gadget again and charging is working.

Signed-off-by: Andreas Kemnade <andreas@kemnade.info>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
This commit is contained in:
Andreas Kemnade 2016-08-25 00:27:59 +02:00 committed by Kishon Vijay Abraham I
parent 78489c7c48
commit b78ea84a7d
1 changed files with 11 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
drivers/phy/phy-twl4030-usb.c
View File

@ -440,6 +440,17 @@ static int __maybe_unused twl4030_usb_runtime_resume(struct device *dev)
(PHY_CLK_CTRL_CLOCKGATING_EN |
PHY_CLK_CTRL_CLK32K_EN));
twl4030_i2c_access(twl, 1);
twl4030_usb_set_mode(twl, twl->usb_mode);
if (twl->usb_mode == T2_USB_MODE_ULPI)
twl4030_i2c_access(twl, 0);
/*
* According to the TPS65950 TRM, there has to be at least 50ms
* delay between setting POWER_CTRL_OTG_ENAB and enabling charging
* so wait here so that a fully enabled phy can be expected after
* resume
*/
msleep(50);
return 0;
}
@ -460,11 +471,6 @@ static int twl4030_phy_power_on(struct phy *phy)
dev_dbg(twl->dev, "%s\n", __func__);
pm_runtime_get_sync(twl->dev);
twl4030_i2c_access(twl, 1);
twl4030_usb_set_mode(twl, twl->usb_mode);
if (twl->usb_mode == T2_USB_MODE_ULPI)
twl4030_i2c_access(twl, 0);
twl->linkstat = MUSB_UNKNOWN;
schedule_delayed_work(&twl->id_workaround_work, HZ);
return 0;