Re: [PATCH v2 16/20] extcon: intel-cht-wc: Use new intel_cht_wc_get_model() helper

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On 21. 11. 15. 오전 2:03, Hans de Goede wrote:
The CHT_WC_VBUS_GPIO_CTLO GPIO actually driving an external 5V Vboost
converter for Vbus depends on the board on which the Cherry Trail -
Whiskey Cove PMIC is actually used.

Since the information about the exact PMIC setup is necessary in other
places too, the drivers/mfd/intel_soc_pmic_chtwc.c code now has a new
intel_cht_wc_get_model() helper.

Only poke the CHT_WC_VBUS_GPIO_CTLO GPIO if this new helper returns
INTEL_CHT_WC_GPD_WIN_POCKET, which indicates the Type-C (with PD and
DP-altmode) setup used on the GPD pocket and GPD win; and on which
this GPIO actually controls an external 5V Vboost converter.

Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx>
---
  drivers/extcon/extcon-intel-cht-wc.c | 35 +++++++++++++++++-----------
  1 file changed, 21 insertions(+), 14 deletions(-)

diff --git a/drivers/extcon/extcon-intel-cht-wc.c b/drivers/extcon/extcon-intel-cht-wc.c
index 771f6f4cf92e..a5aeeecc44fb 100644
--- a/drivers/extcon/extcon-intel-cht-wc.c
+++ b/drivers/extcon/extcon-intel-cht-wc.c
@@ -14,6 +14,7 @@
  #include <linux/module.h>
  #include <linux/mod_devicetable.h>
  #include <linux/platform_device.h>
+#include <linux/property.h>
  #include <linux/regmap.h>
  #include <linux/slab.h>
@@ -358,20 +359,26 @@ static int cht_wc_extcon_probe(struct platform_device *pdev)
  	if (IS_ERR(ext->edev))
  		return PTR_ERR(ext->edev);
- /*
-	 * When a host-cable is detected the BIOS enables an external 5v boost
-	 * converter to power connected devices there are 2 problems with this:
-	 * 1) This gets seen by the external battery charger as a valid Vbus
-	 *    supply and it then tries to feed Vsys from this creating a
-	 *    feedback loop which causes aprox. 300 mA extra battery drain
-	 *    (and unless we drive the external-charger-disable pin high it
-	 *    also tries to charge the battery causing even more feedback).
-	 * 2) This gets seen by the pwrsrc block as a SDP USB Vbus supply
-	 * Since the external battery charger has its own 5v boost converter
-	 * which does not have these issues, we simply turn the separate
-	 * external 5v boost converter off and leave it off entirely.
-	 */
-	cht_wc_extcon_set_5v_boost(ext, false);
+	switch (intel_cht_wc_get_model()) {

intel_cht_wc_get_model() is defined in driver/mfd/intel_soc_pmic_chtwc.c

Usually, mfd drivers share the data structure such as struct intel_soc_pmic. But, didn't call the exported function for only
specific driver between linux kernel framework (extcon vs. mfd).

So that I think that you better to update the mode information
to 'struct intel_soc_pmic' data structure and then use it
instead of using the exported function which may make the confusion.

+	case INTEL_CHT_WC_GPD_WIN_POCKET:
+		/*
+		 * When a host-cable is detected the BIOS enables an external 5v boost
+		 * converter to power connected devices there are 2 problems with this:
+		 * 1) This gets seen by the external battery charger as a valid Vbus
+		 *    supply and it then tries to feed Vsys from this creating a
+		 *    feedback loop which causes aprox. 300 mA extra battery drain
+		 *    (and unless we drive the external-charger-disable pin high it
+		 *    also tries to charge the battery causing even more feedback).
+		 * 2) This gets seen by the pwrsrc block as a SDP USB Vbus supply
+		 * Since the external battery charger has its own 5v boost converter
+		 * which does not have these issues, we simply turn the separate
+		 * external 5v boost converter off and leave it off entirely.
+		 */
+		cht_wc_extcon_set_5v_boost(ext, false);
+		break;
+	default:
+		break;
+	}
/* Enable sw control */
  	ret = cht_wc_extcon_sw_control(ext, true);



--
Best Regards,
Samsung Electronics
Chanwoo Choi



[Index of Archives]     [Linux GPIO]     [Linux SPI]     [Linux Hardward Monitoring]     [LM Sensors]     [Linux USB Devel]     [Linux Media]     [Video for Linux]     [Linux Audio Users]     [Yosemite News]     [Linux Kernel]     [Linux SCSI]

  Powered by Linux