evie/android_kernel_oneplus_msm8998
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usb: phy: qusb: Expose DP/DM operations as a regulator

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Instead of having the controller driver call the PHY's DP/DM
properties on behalf of the charger driver to enable and disable
the regulator, allow the PHY to expose a regulator device.
The charger driver then obtains a handle to this regulator to
perform regulator enable and disable directly.

Change-Id: I266a8cffb4912c2eb6724d73b7ed8c87b83a9e80
Signed-off-by: Jack Pham <jackp@codeaurora.org>
Signed-off-by: Azhar Shaikh <azhars@codeaurora.org>
This commit is contained in:
Jack Pham 2016-02-29 17:09:03 -08:00 • committed by David Keitel
parent bbd370a907
commit 9355dd60f5
1 changed files with 71 additions and 0 deletions
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71
drivers/usb/phy/phy-msm-qusb.c
View file

@ -23,6 +23,8 @@
#include <linux/platform_device.h>
#include <linux/power_supply.h>
#include <linux/regulator/consumer.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/usb/phy.h>
#include <linux/usb/msm_hsusb.h>
@ -132,6 +134,9 @@ struct qusb_phy {
bool rm_pulldown;
bool dpdm_pulsing_enabled;
struct regulator_desc dpdm_rdesc;
struct regulator_dev *dpdm_rdev;
/* emulation targets specific */
void __iomem *emu_phy_base;
bool emulation;
@ -884,6 +889,65 @@ static int qusb_phy_notify_disconnect(struct usb_phy *phy,
return 0;
}
static int qusb_phy_dpdm_regulator_enable(struct regulator_dev *rdev)
{
struct qusb_phy *qphy = rdev_get_drvdata(rdev);
dev_dbg(qphy->phy.dev, "%s\n", __func__);
return qusb_phy_update_dpdm(&qphy->phy, POWER_SUPPLY_DP_DM_DPF_DMF);
}
static int qusb_phy_dpdm_regulator_disable(struct regulator_dev *rdev)
{
struct qusb_phy *qphy = rdev_get_drvdata(rdev);
dev_dbg(qphy->phy.dev, "%s\n", __func__);
return qusb_phy_update_dpdm(&qphy->phy, POWER_SUPPLY_DP_DM_DPR_DMR);
}
static int qusb_phy_dpdm_regulator_is_enabled(struct regulator_dev *rdev)
{
struct qusb_phy *qphy = rdev_get_drvdata(rdev);
dev_dbg(qphy->phy.dev, "%s qphy->rm_pulldown = %d\n", __func__,
qphy->rm_pulldown);
return qphy->rm_pulldown;
}
static struct regulator_ops qusb_phy_dpdm_regulator_ops = {
.enable = qusb_phy_dpdm_regulator_enable,
.disable = qusb_phy_dpdm_regulator_disable,
.is_enabled = qusb_phy_dpdm_regulator_is_enabled,
};
static int qusb_phy_regulator_init(struct qusb_phy *qphy)
{
struct device *dev = qphy->phy.dev;
struct regulator_config cfg = {};
struct regulator_init_data *init_data;
init_data = devm_kzalloc(dev, sizeof(*init_data), GFP_KERNEL);
if (!init_data)
return -ENOMEM;
init_data->constraints.valid_ops_mask |= REGULATOR_CHANGE_STATUS;
qphy->dpdm_rdesc.owner = THIS_MODULE;
qphy->dpdm_rdesc.type = REGULATOR_VOLTAGE;
qphy->dpdm_rdesc.ops = &qusb_phy_dpdm_regulator_ops;
qphy->dpdm_rdesc.name = kbasename(dev->of_node->full_name);
cfg.dev = dev;
cfg.init_data = init_data;
cfg.driver_data = qphy;
cfg.of_node = dev->of_node;
qphy->dpdm_rdev = devm_regulator_register(dev, &qphy->dpdm_rdesc, &cfg);
if (IS_ERR(qphy->dpdm_rdev))
return PTR_ERR(qphy->dpdm_rdev);
return 0;
}
static int qusb_phy_probe(struct platform_device *pdev)
{
struct qusb_phy *qphy;
@ -1135,6 +1199,13 @@ static int qusb_phy_probe(struct platform_device *pdev)
clk_reset(qphy->phy_reset, CLK_RESET_ASSERT);
ret = usb_add_phy_dev(&qphy->phy);
if (ret)
return ret;
ret = qusb_phy_regulator_init(qphy);
if (ret)
usb_remove_phy(&qphy->phy);
return ret;
}