C++ regulator_set_optimum_mode函数代码示例

/*
 * Disable vdda and set uA
 */
static int mdss_edp_regulator_off(struct mdss_edp_drv_pdata *edp_drv)
{
	int ret;

	ret = regulator_disable(edp_drv->vdda_vreg);
	if (ret) {
		pr_err("%s: Failed to disable vdda_vreg regulator.\n",
				__func__);
		return ret;
	}

	ret = regulator_set_optimum_mode(edp_drv->vdda_vreg, VDDA_UA_OFF_LOAD);
	if (ret < 0) {
		pr_err("%s: vdda_vreg set regulator mode failed.\n",
				__func__);
		return ret;
	}

	return 0;
}

static int msm_sata_vreg_put_disable(struct device *dev,
		struct regulator *reg, const char *name, int max_uV)
{
	int ret;

	if (!reg)
		return 0;

	ret = regulator_disable(reg);
	if (ret) {
		dev_err(dev, "Regulator: %s disable failed err=%d\n",
				name, ret);
		goto err;
	}

	if (regulator_count_voltages(reg) > 0) {
		ret = regulator_set_voltage(reg, 0, max_uV);
		if (ret < 0) {
			dev_err(dev, "Regulator: %s set voltage to 0 failed, err=%d\n",
					name, ret);
			goto err;
		}

		ret = regulator_set_optimum_mode(reg, 0);
		if (ret < 0) {
			dev_err(dev, "Regulator: %s set optimum mode(uA_load = 0) failed, err=%d\n",
					name, ret);
			goto err;
		} else {
			/*
			 * regulator_set_optimum_mode() can return non zero
			 * value even for success case.
			 */
			ret = 0;
		}
	}

err:
	devm_regulator_put(reg);
	return ret;
}

static int power_rail_on_stage(struct mmi_disp_reg_lst *reg_lst)
{
	int i, rc = 0;
	struct mmi_disp_reg *reg;
	struct mmi_disp_gpio_config *en;

	pr_debug("%s is called\n", __func__);

	for (i = 0; i < reg_lst->num_disp_regs; i++) {
		reg = &reg_lst->disp_reg[i];
		en = &reg->en_gpio;

		if (reg->reg_id[0] != '\0' && !IS_ERR_OR_NULL(reg->handle)) {
			rc = regulator_set_optimum_mode(reg->handle, 100000);
			if (rc < 0) {
				pr_err("%s: failed to set_optimum for %s." \
					"rc=%d\n", __func__, reg->reg_id, rc);
				rc = -EINVAL;
				goto end;
			} else {
				pr_debug("%s: set set_optimum for %s(100000)\n",
							__func__, reg->reg_id);
				rc = 0;
			}
		}

		/*
		 * If reg has enable gpio line, or it doesn't gpio en because
		 * it is shared with other reg then it can be enable now
		 */
		if (!IS_ERR_OR_NULL(reg->handle)) {
			if ((en->num >= 0) || (reg->shared_gpio_en == 1)) {
				rc = panel_reg_enable(reg, 1);
				if (rc)
					goto end;
			}
		}
	}
end:
	return rc;
}

static int camera_sensor_power_enable(char *power, unsigned volt, struct regulator **sensor_power)
{
	int rc;

	if (power == NULL)
		return -ENODEV;

	*sensor_power = regulator_get(NULL, power);

	if (IS_ERR(*sensor_power)) {
		pr_err("[CAM] %s: Unable to get %s\n", __func__, power);
		return -ENODEV;
	}

	if (strcmp(power, "8038_l17") == 0) {
		regulator_set_optimum_mode(*sensor_power, 10000);
	}

	if (volt != 1800000) {
		rc = regulator_set_voltage(*sensor_power, volt, volt);
		if (rc < 0) {
			pr_err("[CAM] %s: unable to set %s voltage to %d rc:%d\n",
					__func__, power, volt, rc);
			regulator_put(*sensor_power);
			*sensor_power = NULL;
			return -ENODEV;
		}
	}

	rc = regulator_enable(*sensor_power);
	if (rc < 0) {
		pr_err("[CAM] %s: Enable regulator %s failed\n", __func__, power);
		regulator_put(*sensor_power);
		*sensor_power = NULL;
		return -ENODEV;
	}

	return rc;
}

static int power_rail_off_unstage(struct mmi_disp_reg_lst *reg_lst)
{
	int i, rc = 0;
	struct mmi_disp_reg *reg;
	struct mmi_disp_gpio_config *en;

	pr_debug("%s is called\n", __func__);

	/* this is disable then it disables in reversed order */
	for (i = reg_lst->num_disp_regs - 1; i >= 0; i--) {
		reg = &reg_lst->disp_reg[i];
		en = &reg->en_gpio;

		/* If reg has en gpio line, then it can be disable now */
		if (!IS_ERR_OR_NULL(reg->handle)) {
			if ((en->num >= 0) || (reg->shared_gpio_en == 1)) {
				rc = panel_reg_enable(reg, 0);
				if (rc)
					goto end;
			}
		}

		if (reg->reg_id[0] != '\0' && !IS_ERR_OR_NULL(reg->handle)) {
			rc = regulator_set_optimum_mode(reg->handle, 100);
			if (rc < 0) {
				pr_err("%s: failed to set_optimum for %s." \
					"rc=%d\n", __func__, reg->reg_id, rc);
				rc = -EINVAL;
				goto end;
			} else {
				pr_debug("%s: set set_optimum for %s(100)\n",
							__func__, reg->reg_id);
				rc = 0;
			}
		}
	}
end:
	return rc;
}

int ufs_qcom_phy_cfg_vreg(struct phy *phy,
                          struct ufs_qcom_phy_vreg *vreg, bool on)
{
    int ret = 0;
    struct regulator *reg = vreg->reg;
    const char *name = vreg->name;
    int min_uV;
    int uA_load;
    struct ufs_qcom_phy *ufs_qcom_phy = get_ufs_qcom_phy(phy);
    struct device *dev = ufs_qcom_phy->dev;

    BUG_ON(!vreg);

    if (regulator_count_voltages(reg) > 0) {
        min_uV = on ? vreg->min_uV : 0;
        ret = regulator_set_voltage(reg, min_uV, vreg->max_uV);
        if (ret) {
            dev_err(dev, "%s: %s set voltage failed, err=%d\n",
                    __func__, name, ret);
            goto out;
        }
        uA_load = on ? vreg->max_uA : 0;
        ret = regulator_set_optimum_mode(reg, uA_load);
        if (ret >= 0) {
            /*
             * regulator_set_optimum_mode() returns new regulator
             * mode upon success.
             */
            ret = 0;
        } else {
            dev_err(dev, "%s: %s set optimum mode(uA_load=%d) failed, err=%d\n",
                    __func__, name, uA_load, ret);
            goto out;
        }
    }
out:
    return ret;
}

static int pil_q6v4_power_up(struct device *dev)
{
	int err;
	struct q6v4_data *drv = dev_get_drvdata(dev);

	err = regulator_set_voltage(drv->vreg, 1050000, 1050000);
	if (err) {
		dev_err(dev, "Failed to set regulator's voltage.\n");
		return err;
	}
	err = regulator_set_optimum_mode(drv->vreg, 100000);
	if (err < 0) {
		dev_err(dev, "Failed to set regulator's mode.\n");
		return err;
	}
	err = regulator_enable(drv->vreg);
	if (err) {
		dev_err(dev, "Failed to enable regulator.\n");
		return err;
	}
	drv->vreg_enabled = true;
	return 0;
}

static int ts_set_l17(int on)
{
	int rc = -EINVAL;
	static struct regulator *vreg_l17;

	vreg_l17 = regulator_get(NULL, "8921_l17");	/* 3P0_L17_TOUCH */
	if (IS_ERR(vreg_l17)) {
		pr_err("%s: regulator get of touch_3p0 failed (%ld)\n"
			, __func__, PTR_ERR(vreg_l17));
		rc = PTR_ERR(vreg_l17);
		return rc;
	}
	rc = regulator_set_voltage(vreg_l17,
		MELFAS_VD33_MIN_UV, MELFAS_VD33_MAX_UV);

	if (on) {
		rc = regulator_set_optimum_mode(vreg_l17, MELFAS_VD33_CURR_UA);
		rc = regulator_enable(vreg_l17);
	} else {
		rc = regulator_disable(vreg_l17);
	}
	return rc;
}

static int smsc_hub_remove(struct platform_device *pdev)
{
	const struct smsc_hub_platform_data *pdata;

	pdata = pdev->dev.platform_data;
	if (smsc_hub->client) {
		i2c_unregister_device(smsc_hub->client);
		smsc_hub->client = NULL;
		i2c_del_driver(&hsic_hub_driver);
	}
	pm_runtime_disable(&pdev->dev);
	msm_xo_put(smsc_hub->xo_handle);

	regulator_disable(smsc_hub->hsic_hub_reg);
	regulator_set_optimum_mode(smsc_hub->hsic_hub_reg, 0);
	regulator_set_voltage(smsc_hub->hsic_hub_reg, 0,
				HSIC_HUB_VDD_VOL_MIN);
	gpio_free(pdata->hub_reset);
	regulator_put(smsc_hub->hsic_hub_reg);
	kfree(smsc_hub);

	return 0;
}

/**
 * usb_device_phy_en() - for enabling the 5V to usb gadget
 * @enable: to enabling the Phy for device.
 *
 * This function used to set the voltage for USB gadget mode.
 */
static void usb_device_phy_en(int enable)
{
	int volt = 0;
	int ret = -1;

	if (phy_enable_stat == enable)
		return;

	if (enable == USB_ENABLE) {
		wake_lock(&ab8500_musb_wakelock);
		ux500_pins_enable(usb_gpio_pins);
		clk_enable(sysclock);
		phy_enable_stat = USB_ENABLE;
		regulator_enable(musb_vape_supply);
		regulator_enable(musb_smps2_supply);

		/* Set Vintcore12 LDO to 1.3V */
		ret = regulator_set_voltage(musb_vintcore_supply,
						1300000, 1350000);
		if (ret < 0)
			printk(KERN_ERR "Failed to set the Vintcore"
					" to 1.3V, ret=%d\n", ret);
		ret = regulator_set_optimum_mode(musb_vintcore_supply,
						 28000);
		if (ret < 0)
			printk(KERN_ERR "Failed to set optimum mode"
					" (ret=%d)\n", ret);
		regulator_enable(musb_vintcore_supply);
		volt = regulator_get_voltage(musb_vintcore_supply);
		if ((volt != 1300000) && (volt != 1350000))
			printk(KERN_ERR "Vintcore is not"
					" set to 1.3V"
					" volt=%d\n", volt);
#ifdef	CONFIG_PM
		stm_musb_context(USB_ENABLE);
#endif

		/* Workaround for USB performance issue. */
		schedule_delayed_work_on(0,
				 &work_usb_workaround,
				 msecs_to_jiffies(USB_PROBE_DELAY));

		prcmu_qos_update_requirement(PRCMU_QOS_APE_OPP,
				DEVICE_NAME, 100);

		abx500_set_register_interruptible(device,
				AB8500_USB,
				AB8500_USB_PHY_CTRL_REG,
				AB8500_USB_DEVICE_ENABLE);
	} else { /* enable == USB_DISABLE */
		/*
		 * Workaround: Sometimes the DISCONNECT interrupt is
		 * not generated in musb_core. Force a disconnect if
		 * necessary before we power down the PHY.
		 */
		stm_musb_force_disconnect();

		if (boot_time_flag)
			boot_time_flag = USB_DISABLE;

		/*
		 * Workaround for bug31952 in ABB cut2.0. Write 0x1
		 * before disabling the PHY.
		 */
		abx500_set_register_interruptible(device, AB8500_USB,
			     AB8500_USB_PHY_CTRL_REG,
			     AB8500_USB_DEVICE_ENABLE);

		udelay(200);

		abx500_set_register_interruptible(device,
			AB8500_USB,
			AB8500_USB_PHY_CTRL_REG,
			AB8500_USB_DEVICE_DISABLE);
		prcmu_qos_update_requirement(PRCMU_QOS_APE_OPP,
				DEVICE_NAME, 50);

		/* Workaround for USB performance issue. */
		cancel_delayed_work_sync(&work_usb_workaround);
		prcmu_qos_update_requirement(PRCMU_QOS_ARM_OPP,
					     "usb", 25);

		prcmu_release_usb_wakeup_state();
		phy_enable_stat = USB_DISABLE;
		regulator_disable(musb_vape_supply);
		regulator_disable(musb_smps2_supply);
		regulator_disable(musb_vintcore_supply);
		regulator_set_optimum_mode(musb_vintcore_supply, 0);
		/* Set Vintcore12 LDO to 0V to 1.35V */
		ret = regulator_set_voltage(musb_vintcore_supply,
						0000000, 1350000);
		if (ret < 0)
			printk(KERN_ERR "Failed to set the Vintcore"
					" to 0V to 1.35V,"
//.........这里部分代码省略.........

static int mipi_dsi_panel_power(int on)
{
	static struct regulator *v_lcm, *v_lcmio, *v_dsivdd;
	static bool bPanelPowerOn = false;
	int rc;

	char *lcm_str = "8921_l11";
	char *lcmio_str = "8921_lvs5";
	char *dsivdd_str = "8921_l2";

	printk(KERN_ERR "[DISP] %s +++\n", __func__);
	/* To avoid system crash in shutdown for non-panel case */
	if (panel_type == PANEL_ID_NONE)
		return -ENODEV;

	printk(KERN_INFO "%s: state : %d\n", __func__, on);

	if (!dsi_power_on) {
		v_lcm = regulator_get(&msm_mipi_dsi1_device.dev,
				lcm_str);
		if (IS_ERR_OR_NULL(v_lcm)) {
			printk(KERN_ERR "could not get %s, rc = %ld\n",
				lcm_str, PTR_ERR(v_lcm));
			return -ENODEV;
		}

		v_lcmio = regulator_get(&msm_mipi_dsi1_device.dev,
				lcmio_str);
		if (IS_ERR_OR_NULL(v_lcmio)) {
			printk(KERN_ERR "could not get %s, rc = %ld\n",
				lcmio_str, PTR_ERR(v_lcmio));
			return -ENODEV;
		}


		v_dsivdd = regulator_get(&msm_mipi_dsi1_device.dev,
				dsivdd_str);
		if (IS_ERR_OR_NULL(v_dsivdd)) {
			printk(KERN_ERR "could not get %s, rc = %ld\n",
				dsivdd_str, PTR_ERR(v_dsivdd));
			return -ENODEV;
		}

		rc = regulator_set_voltage(v_lcm, 3000000, 3000000);
		if (rc) {
			printk(KERN_ERR "%s#%d: set_voltage %s failed, rc=%d\n", __func__, __LINE__, lcm_str, rc);
			return -EINVAL;
		}

		rc = regulator_set_voltage(v_dsivdd, 1200000, 1200000);
		if (rc) {
			printk(KERN_ERR "%s#%d: set_voltage %s failed, rc=%d\n", __func__, __LINE__, dsivdd_str, rc);
			return -EINVAL;
		}

		rc = gpio_request(FIGHTER_LCD_RSTz, "LCM_RST_N");
		if (rc) {
			printk(KERN_ERR "%s:LCM gpio %d request failed, rc=%d\n", __func__, FIGHTER_LCD_RSTz, rc);
			return -EINVAL;
		}

		dsi_power_on = true;
	}

	if (on) {
		printk(KERN_INFO "%s: on\n", __func__);

		rc = regulator_set_optimum_mode(v_lcm, 100000);
		if (rc < 0) {
			printk(KERN_ERR "set_optimum_mode %s failed, rc=%d\n", lcm_str, rc);
			return -EINVAL;
		}
		rc = regulator_set_optimum_mode(v_dsivdd, 100000);
		if (rc < 0) {
			printk(KERN_ERR "set_optimum_mode %s failed, rc=%d\n", dsivdd_str, rc);
			return -EINVAL;
		}
		if (isOrise()) {
			rc = regulator_enable(v_lcmio);
			if (rc) {
				printk(KERN_ERR "enable regulator %s failed, rc=%d\n", lcmio_str, rc);
				return -ENODEV;
			}
		} else {
			rc = regulator_enable(v_lcm);
			if (rc) {
				printk(KERN_ERR "enable regulator %s failed, rc=%d\n", lcm_str, rc);
				return -ENODEV;
			}
		}
		rc = regulator_enable(v_dsivdd);
		if (rc) {
			printk(KERN_ERR "enable regulator %s failed, rc=%d\n", dsivdd_str, rc);
			return -ENODEV;
		}
		if (isOrise()) {
			rc = regulator_enable(v_lcm);
			if (rc) {
				printk(KERN_ERR "enable regulator %s failed, rc=%d\n", lcm_str, rc);
				return -ENODEV;
//.........这里部分代码省略.........

int msm_camera_config_vreg(struct device *dev, struct camera_vreg_t *cam_vreg,
		int num_vreg, enum msm_camera_vreg_name_t *vreg_seq,
		int num_vreg_seq, struct regulator **reg_ptr, int config)
{
	int i = 0, j = 0;
	int rc = 0;
	struct camera_vreg_t *curr_vreg;

	if (num_vreg_seq > num_vreg) {
		pr_err("%s:%d vreg sequence invalid\n", __func__, __LINE__);
		return -EINVAL;
	}
	if (!num_vreg_seq)
		num_vreg_seq = num_vreg;

	if (config) {
		for (i = 0; i < num_vreg_seq; i++) {
			if (vreg_seq) {
				j = vreg_seq[i];
				if (j >= num_vreg)
					continue;
			} else
				j = i;
			curr_vreg = &cam_vreg[j];
			reg_ptr[j] = regulator_get(dev,
				curr_vreg->reg_name);
			if (IS_ERR(reg_ptr[j])) {
				pr_err("%s: %s get failed\n",
					 __func__,
					 curr_vreg->reg_name);
				reg_ptr[j] = NULL;
				goto vreg_get_fail;
			}
			if (regulator_count_voltages(reg_ptr[j]) > 0) {
				rc = regulator_set_voltage(
					reg_ptr[j],
					curr_vreg->min_voltage,
					curr_vreg->max_voltage);
				if (rc < 0) {
					pr_err("%s: %s set voltage failed\n",
						__func__,
						curr_vreg->reg_name);
					goto vreg_set_voltage_fail;
				}
				if (curr_vreg->op_mode >= 0) {
					rc = regulator_set_optimum_mode(
						reg_ptr[j],
						curr_vreg->op_mode);
					if (rc < 0) {
						pr_err(
						"%s:%s set optimum mode fail\n",
						__func__,
						curr_vreg->reg_name);
						goto vreg_set_opt_mode_fail;
					}
				}
			}
		}
	} else {
		for (i = num_vreg_seq-1; i >= 0; i--) {
			if (vreg_seq) {
				j = vreg_seq[i];
				if (j >= num_vreg)
					continue;
			} else
				j = i;
			curr_vreg = &cam_vreg[j];
			if (reg_ptr[j]) {
				if (regulator_count_voltages(reg_ptr[j]) > 0) {
					if (curr_vreg->op_mode >= 0) {
						regulator_set_optimum_mode(
							reg_ptr[j], 0);
					}
					regulator_set_voltage(
						reg_ptr[j], 0, curr_vreg->
						max_voltage);
				}
				regulator_put(reg_ptr[j]);
				reg_ptr[j] = NULL;
			}
		}
	}
	return 0;

vreg_unconfig:
if (regulator_count_voltages(reg_ptr[j]) > 0)
	regulator_set_optimum_mode(reg_ptr[j], 0);

vreg_set_opt_mode_fail:
if (regulator_count_voltages(reg_ptr[j]) > 0)
	regulator_set_voltage(reg_ptr[j], 0,
		curr_vreg->max_voltage);

vreg_set_voltage_fail:
	regulator_put(reg_ptr[j]);
	reg_ptr[j] = NULL;

vreg_get_fail:
	for (i--; i >= 0; i--) {
		if (vreg_seq) {
//.........这里部分代码省略.........

int msm_camera_config_single_vreg(struct device *dev,
	struct camera_vreg_t *cam_vreg, struct regulator **reg_ptr, int config)
{
	int rc = 0;
	const char *vreg_name = NULL;

	if (!dev || !cam_vreg || !reg_ptr) {
		pr_err("%s: get failed NULL parameter\n", __func__);
		goto vreg_get_fail;
	}
	if (cam_vreg->type == VREG_TYPE_CUSTOM) {
		if (cam_vreg->custom_vreg_name == NULL) {
			pr_err("%s : can't find sub reg name",
				__func__);
			goto vreg_get_fail;
		}
		vreg_name = cam_vreg->custom_vreg_name;
	} else {
		if (cam_vreg->reg_name == NULL) {
			pr_err("%s : can't find reg name", __func__);
			goto vreg_get_fail;
		}
		vreg_name = cam_vreg->reg_name;
	}

	if (config) {
		CDBG("%s enable %s\n", __func__, vreg_name);
		*reg_ptr = regulator_get(dev, vreg_name);
		if (IS_ERR(*reg_ptr)) {
			pr_err("%s: %s get failed\n", __func__, vreg_name);
			*reg_ptr = NULL;
			goto vreg_get_fail;
		}
		if (regulator_count_voltages(*reg_ptr) > 0) {
			CDBG("%s: voltage min=%d, max=%d\n",
				__func__, cam_vreg->min_voltage,
				cam_vreg->max_voltage);
			rc = regulator_set_voltage(
				*reg_ptr, cam_vreg->min_voltage,
				cam_vreg->max_voltage);
			if (rc < 0) {
				pr_err("%s: %s set voltage failed\n",
					__func__, vreg_name);
				goto vreg_set_voltage_fail;
			}
			if (cam_vreg->op_mode >= 0) {
				rc = regulator_set_optimum_mode(*reg_ptr,
					cam_vreg->op_mode);
				if (rc < 0) {
					pr_err(
					"%s: %s set optimum mode failed\n",
					__func__, vreg_name);
					goto vreg_set_opt_mode_fail;
				}
			}
		}
		rc = regulator_enable(*reg_ptr);
		if (rc < 0) {
			pr_err("%s: %s regulator_enable failed\n", __func__,
				vreg_name);
			goto vreg_unconfig;
		}
	} else {
		CDBG("%s disable %s\n", __func__, vreg_name);
		if (*reg_ptr) {
			CDBG("%s disable %s\n", __func__, vreg_name);
			regulator_disable(*reg_ptr);
			if (regulator_count_voltages(*reg_ptr) > 0) {
				if (cam_vreg->op_mode >= 0)
					regulator_set_optimum_mode(*reg_ptr, 0);
				regulator_set_voltage(
					*reg_ptr, 0, cam_vreg->max_voltage);
			}
			regulator_put(*reg_ptr);
			*reg_ptr = NULL;
		} else {
			pr_err("%s can't disable %s\n", __func__, vreg_name);
		}
	}
	return 0;

vreg_unconfig:
if (regulator_count_voltages(*reg_ptr) > 0)
	regulator_set_optimum_mode(*reg_ptr, 0);

vreg_set_opt_mode_fail:
if (regulator_count_voltages(*reg_ptr) > 0)
	regulator_set_voltage(*reg_ptr, 0, cam_vreg->max_voltage);

vreg_set_voltage_fail:
	regulator_put(*reg_ptr);
	*reg_ptr = NULL;

vreg_get_fail:
	return -ENODEV;
}

static int pil_mss_loadable_init(struct modem_data *drv,
					struct platform_device *pdev)
{
	struct q6v5_data *q6;
	struct pil_desc *q6_desc;
	struct resource *res;
	struct property *prop;
	int ret;

	q6 = pil_q6v5_init(pdev);
	if (IS_ERR(q6))
		return PTR_ERR(q6);
	drv->q6 = q6;
	drv->xo = q6->xo;

	q6_desc = &q6->desc;
	q6_desc->owner = THIS_MODULE;
	q6_desc->proxy_timeout = PROXY_TIMEOUT_MS;

	q6_desc->ops = &pil_msa_mss_ops;

	q6->self_auth = of_property_read_bool(pdev->dev.of_node,
							"qcom,pil-self-auth");
	if (q6->self_auth) {
		res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
						    "rmb_base");
		q6->rmb_base = devm_request_and_ioremap(&pdev->dev, res);
		if (!q6->rmb_base)
			return -ENOMEM;
		drv->rmb_base = q6->rmb_base;
		q6_desc->ops = &pil_msa_mss_ops_selfauth;
	}

	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "restart_reg");
	if (!res) {
		res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
							"restart_reg_sec");
		q6->restart_reg_sec = true;
	}

	q6->restart_reg = devm_request_and_ioremap(&pdev->dev, res);
	if (!q6->restart_reg)
		return -ENOMEM;

	q6->vreg = NULL;

	prop = of_find_property(pdev->dev.of_node, "vdd_mss-supply", NULL);
	if (prop) {
		q6->vreg = devm_regulator_get(&pdev->dev, "vdd_mss");
		if (IS_ERR(q6->vreg))
			return PTR_ERR(q6->vreg);

		ret = regulator_set_voltage(q6->vreg, VDD_MSS_UV,
						MAX_VDD_MSS_UV);
		if (ret)
			dev_err(&pdev->dev, "Failed to set vreg voltage.\n");

		ret = regulator_set_optimum_mode(q6->vreg, 100000);
		if (ret < 0) {
			dev_err(&pdev->dev, "Failed to set vreg mode.\n");
			return ret;
		}
	}

	q6->vreg_mx = devm_regulator_get(&pdev->dev, "vdd_mx");
	if (IS_ERR(q6->vreg_mx))
		return PTR_ERR(q6->vreg_mx);
	prop = of_find_property(pdev->dev.of_node, "vdd_mx-uV", NULL);
	if (!prop) {
		dev_err(&pdev->dev, "Missing vdd_mx-uV property\n");
		return -EINVAL;
	}

	res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
		"cxrail_bhs_reg");
	if (res)
		q6->cxrail_bhs = devm_ioremap(&pdev->dev, res->start,
					  resource_size(res));

	q6->ahb_clk = devm_clk_get(&pdev->dev, "iface_clk");
	if (IS_ERR(q6->ahb_clk))
		return PTR_ERR(q6->ahb_clk);

	q6->axi_clk = devm_clk_get(&pdev->dev, "bus_clk");
	if (IS_ERR(q6->axi_clk))
		return PTR_ERR(q6->axi_clk);

	q6->rom_clk = devm_clk_get(&pdev->dev, "mem_clk");
	if (IS_ERR(q6->rom_clk))
		return PTR_ERR(q6->rom_clk);

	/* Optional. */
	if (of_property_match_string(pdev->dev.of_node,
			"qcom,active-clock-names", "gpll0_mss_clk") >= 0)
		q6->gpll0_mss_clk = devm_clk_get(&pdev->dev, "gpll0_mss_clk");

	ret = pil_desc_init(q6_desc);

	return ret;
}

static int reg_set_optimum_mode_check(struct regulator *reg, int load_uA)
{
	return (regulator_count_voltages(reg) > 0) ?
		regulator_set_optimum_mode(reg, load_uA) : 0;
}