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USB: OTG: msm: Disable PMIC ID pullup before enabling ACA ID detection

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PMIC internal pullup resistor to be between 75k - 480k.   The ACA
pulldown resistor can range from 36k - 220k.  So leaving the PMIC
internal pullup on while the PHY does ACA detection would cause
problems.

Change-Id: I70e68094ce96a79531b7d3173c9a23fdcc52840d
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
This commit is contained in:
Pavankumar Kondeti
2012-02-01 13:57:13 +05:30
parent f3b464e6e6
commit 446f45463f
1 changed files with 6 additions and 0 deletions
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6
drivers/usb/otg/msm_otg.c
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@@ -37,6 +37,7 @@
#include <linux/usb/msm_hsusb_hw.h>
#include <linux/regulator/consumer.h>
#include <linux/mfd/pm8xxx/pm8921-charger.h>
#include <linux/mfd/pm8xxx/misc.h>
#include <linux/pm_qos_params.h>
#include <linux/power_supply.h>
@@ -571,6 +572,9 @@ static int msm_otg_reset(struct otg_transceiver *otg)
writel_relaxed(val, USB_OTGSC);
ulpi_write(otg, ulpi_val, ULPI_USB_INT_EN_RISE);
ulpi_write(otg, ulpi_val, ULPI_USB_INT_EN_FALL);
} else if (pdata->otg_control == OTG_PMIC_CONTROL) {
/* Enable PMIC pull-up */
pm8xxx_usb_id_pullup(1);
}
return 0;
@@ -1307,6 +1311,8 @@ static void msm_chg_enable_aca_det(struct msm_otg *motg)
ulpi_write(otg, 0x01, 0x0C);
ulpi_write(otg, 0x10, 0x0F);
ulpi_write(otg, 0x10, 0x12);
/* Disable PMIC ID pull-up */
pm8xxx_usb_id_pullup(0);
/* Enable ACA ID detection */
ulpi_write(otg, 0x20, 0x85);
aca_id_turned_on = true;