mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-10-05 00:20:32 +00:00
Merge branch 'acpi-lpss' into pm-runtime
This commit is contained in:
commit
4bea2b4cd9
2 changed files with 76 additions and 29 deletions
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@ -1,7 +1,7 @@
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/*
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/*
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* ACPI support for Intel Lynxpoint LPSS.
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* ACPI support for Intel Lynxpoint LPSS.
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*
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*
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* Copyright (C) 2013, Intel Corporation
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* Copyright (C) 2013, 2014, Intel Corporation
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* Authors: Mika Westerberg <mika.westerberg@linux.intel.com>
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* Authors: Mika Westerberg <mika.westerberg@linux.intel.com>
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* Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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* Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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*
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*
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@ -60,6 +60,8 @@ ACPI_MODULE_NAME("acpi_lpss");
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#define LPSS_CLK_DIVIDER BIT(2)
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#define LPSS_CLK_DIVIDER BIT(2)
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#define LPSS_LTR BIT(3)
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#define LPSS_LTR BIT(3)
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#define LPSS_SAVE_CTX BIT(4)
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#define LPSS_SAVE_CTX BIT(4)
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#define LPSS_DEV_PROXY BIT(5)
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#define LPSS_PROXY_REQ BIT(6)
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struct lpss_private_data;
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struct lpss_private_data;
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@ -70,8 +72,10 @@ struct lpss_device_desc {
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void (*setup)(struct lpss_private_data *pdata);
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void (*setup)(struct lpss_private_data *pdata);
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};
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};
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static struct device *proxy_device;
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static struct lpss_device_desc lpss_dma_desc = {
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static struct lpss_device_desc lpss_dma_desc = {
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.flags = LPSS_CLK,
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.flags = LPSS_CLK | LPSS_PROXY_REQ,
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};
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};
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struct lpss_private_data {
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struct lpss_private_data {
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@ -146,22 +150,24 @@ static struct lpss_device_desc byt_pwm_dev_desc = {
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};
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};
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static struct lpss_device_desc byt_uart_dev_desc = {
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static struct lpss_device_desc byt_uart_dev_desc = {
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.flags = LPSS_CLK | LPSS_CLK_GATE | LPSS_CLK_DIVIDER | LPSS_SAVE_CTX,
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.flags = LPSS_CLK | LPSS_CLK_GATE | LPSS_CLK_DIVIDER | LPSS_SAVE_CTX |
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LPSS_DEV_PROXY,
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.prv_offset = 0x800,
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.prv_offset = 0x800,
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.setup = lpss_uart_setup,
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.setup = lpss_uart_setup,
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};
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};
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static struct lpss_device_desc byt_spi_dev_desc = {
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static struct lpss_device_desc byt_spi_dev_desc = {
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.flags = LPSS_CLK | LPSS_CLK_GATE | LPSS_CLK_DIVIDER | LPSS_SAVE_CTX,
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.flags = LPSS_CLK | LPSS_CLK_GATE | LPSS_CLK_DIVIDER | LPSS_SAVE_CTX |
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LPSS_DEV_PROXY,
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.prv_offset = 0x400,
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.prv_offset = 0x400,
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};
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};
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static struct lpss_device_desc byt_sdio_dev_desc = {
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static struct lpss_device_desc byt_sdio_dev_desc = {
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.flags = LPSS_CLK,
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.flags = LPSS_CLK | LPSS_DEV_PROXY,
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};
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};
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static struct lpss_device_desc byt_i2c_dev_desc = {
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static struct lpss_device_desc byt_i2c_dev_desc = {
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.flags = LPSS_CLK | LPSS_SAVE_CTX,
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.flags = LPSS_CLK | LPSS_SAVE_CTX | LPSS_DEV_PROXY,
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.prv_offset = 0x800,
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.prv_offset = 0x800,
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.setup = byt_i2c_setup,
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.setup = byt_i2c_setup,
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};
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};
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@ -368,6 +374,8 @@ static int acpi_lpss_create_device(struct acpi_device *adev,
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adev->driver_data = pdata;
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adev->driver_data = pdata;
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pdev = acpi_create_platform_device(adev);
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pdev = acpi_create_platform_device(adev);
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if (!IS_ERR_OR_NULL(pdev)) {
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if (!IS_ERR_OR_NULL(pdev)) {
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if (!proxy_device && dev_desc->flags & LPSS_DEV_PROXY)
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proxy_device = &pdev->dev;
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return 1;
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return 1;
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}
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}
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@ -499,14 +507,15 @@ static void acpi_lpss_set_ltr(struct device *dev, s32 val)
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/**
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/**
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* acpi_lpss_save_ctx() - Save the private registers of LPSS device
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* acpi_lpss_save_ctx() - Save the private registers of LPSS device
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* @dev: LPSS device
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* @dev: LPSS device
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* @pdata: pointer to the private data of the LPSS device
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*
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*
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* Most LPSS devices have private registers which may loose their context when
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* Most LPSS devices have private registers which may loose their context when
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* the device is powered down. acpi_lpss_save_ctx() saves those registers into
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* the device is powered down. acpi_lpss_save_ctx() saves those registers into
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* prv_reg_ctx array.
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* prv_reg_ctx array.
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*/
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*/
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static void acpi_lpss_save_ctx(struct device *dev)
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static void acpi_lpss_save_ctx(struct device *dev,
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struct lpss_private_data *pdata)
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{
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{
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struct lpss_private_data *pdata = acpi_driver_data(ACPI_COMPANION(dev));
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unsigned int i;
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unsigned int i;
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for (i = 0; i < LPSS_PRV_REG_COUNT; i++) {
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for (i = 0; i < LPSS_PRV_REG_COUNT; i++) {
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@ -521,12 +530,13 @@ static void acpi_lpss_save_ctx(struct device *dev)
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/**
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/**
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* acpi_lpss_restore_ctx() - Restore the private registers of LPSS device
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* acpi_lpss_restore_ctx() - Restore the private registers of LPSS device
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* @dev: LPSS device
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* @dev: LPSS device
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* @pdata: pointer to the private data of the LPSS device
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*
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*
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* Restores the registers that were previously stored with acpi_lpss_save_ctx().
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* Restores the registers that were previously stored with acpi_lpss_save_ctx().
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*/
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*/
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static void acpi_lpss_restore_ctx(struct device *dev)
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static void acpi_lpss_restore_ctx(struct device *dev,
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struct lpss_private_data *pdata)
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{
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{
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struct lpss_private_data *pdata = acpi_driver_data(ACPI_COMPANION(dev));
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unsigned int i;
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unsigned int i;
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/*
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/*
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@ -549,23 +559,31 @@ static void acpi_lpss_restore_ctx(struct device *dev)
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#ifdef CONFIG_PM_SLEEP
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#ifdef CONFIG_PM_SLEEP
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static int acpi_lpss_suspend_late(struct device *dev)
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static int acpi_lpss_suspend_late(struct device *dev)
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{
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{
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int ret = pm_generic_suspend_late(dev);
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struct lpss_private_data *pdata = acpi_driver_data(ACPI_COMPANION(dev));
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int ret;
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ret = pm_generic_suspend_late(dev);
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if (ret)
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if (ret)
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return ret;
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return ret;
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acpi_lpss_save_ctx(dev);
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if (pdata->dev_desc->flags & LPSS_SAVE_CTX)
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acpi_lpss_save_ctx(dev, pdata);
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return acpi_dev_suspend_late(dev);
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return acpi_dev_suspend_late(dev);
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}
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}
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static int acpi_lpss_resume_early(struct device *dev)
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static int acpi_lpss_resume_early(struct device *dev)
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{
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{
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int ret = acpi_dev_resume_early(dev);
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struct lpss_private_data *pdata = acpi_driver_data(ACPI_COMPANION(dev));
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int ret;
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ret = acpi_dev_resume_early(dev);
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if (ret)
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if (ret)
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return ret;
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return ret;
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acpi_lpss_restore_ctx(dev);
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if (pdata->dev_desc->flags & LPSS_SAVE_CTX)
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acpi_lpss_restore_ctx(dev, pdata);
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return pm_generic_resume_early(dev);
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return pm_generic_resume_early(dev);
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}
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}
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#endif /* CONFIG_PM_SLEEP */
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#endif /* CONFIG_PM_SLEEP */
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@ -573,23 +591,44 @@ static int acpi_lpss_resume_early(struct device *dev)
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#ifdef CONFIG_PM_RUNTIME
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#ifdef CONFIG_PM_RUNTIME
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static int acpi_lpss_runtime_suspend(struct device *dev)
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static int acpi_lpss_runtime_suspend(struct device *dev)
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{
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{
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int ret = pm_generic_runtime_suspend(dev);
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struct lpss_private_data *pdata = acpi_driver_data(ACPI_COMPANION(dev));
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int ret;
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ret = pm_generic_runtime_suspend(dev);
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if (ret)
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if (ret)
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return ret;
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return ret;
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acpi_lpss_save_ctx(dev);
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if (pdata->dev_desc->flags & LPSS_SAVE_CTX)
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return acpi_dev_runtime_suspend(dev);
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acpi_lpss_save_ctx(dev, pdata);
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ret = acpi_dev_runtime_suspend(dev);
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if (ret)
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return ret;
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if (pdata->dev_desc->flags & LPSS_PROXY_REQ && proxy_device)
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return pm_runtime_put_sync_suspend(proxy_device);
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return 0;
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}
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}
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static int acpi_lpss_runtime_resume(struct device *dev)
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static int acpi_lpss_runtime_resume(struct device *dev)
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{
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{
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int ret = acpi_dev_runtime_resume(dev);
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struct lpss_private_data *pdata = acpi_driver_data(ACPI_COMPANION(dev));
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int ret;
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if (pdata->dev_desc->flags & LPSS_PROXY_REQ && proxy_device) {
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ret = pm_runtime_get_sync(proxy_device);
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if (ret)
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return ret;
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}
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ret = acpi_dev_runtime_resume(dev);
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if (ret)
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if (ret)
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return ret;
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return ret;
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acpi_lpss_restore_ctx(dev);
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if (pdata->dev_desc->flags & LPSS_SAVE_CTX)
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acpi_lpss_restore_ctx(dev, pdata);
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return pm_generic_runtime_resume(dev);
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return pm_generic_runtime_resume(dev);
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}
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}
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#endif /* CONFIG_PM_RUNTIME */
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#endif /* CONFIG_PM_RUNTIME */
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@ -631,30 +670,27 @@ static int acpi_lpss_platform_notify(struct notifier_block *nb,
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return 0;
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return 0;
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pdata = acpi_driver_data(adev);
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pdata = acpi_driver_data(adev);
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if (!pdata || !pdata->mmio_base)
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if (!pdata)
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return 0;
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return 0;
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if (pdata->mmio_size < pdata->dev_desc->prv_offset + LPSS_LTR_SIZE) {
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if (pdata->mmio_base &&
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pdata->mmio_size < pdata->dev_desc->prv_offset + LPSS_LTR_SIZE) {
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dev_err(&pdev->dev, "MMIO size insufficient to access LTR\n");
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dev_err(&pdev->dev, "MMIO size insufficient to access LTR\n");
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return 0;
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return 0;
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}
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}
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switch (action) {
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switch (action) {
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case BUS_NOTIFY_BOUND_DRIVER:
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if (pdata->dev_desc->flags & LPSS_SAVE_CTX)
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pdev->dev.pm_domain = &acpi_lpss_pm_domain;
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break;
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case BUS_NOTIFY_UNBOUND_DRIVER:
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if (pdata->dev_desc->flags & LPSS_SAVE_CTX)
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pdev->dev.pm_domain = NULL;
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break;
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case BUS_NOTIFY_ADD_DEVICE:
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case BUS_NOTIFY_ADD_DEVICE:
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pdev->dev.pm_domain = &acpi_lpss_pm_domain;
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if (pdata->dev_desc->flags & LPSS_LTR)
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if (pdata->dev_desc->flags & LPSS_LTR)
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return sysfs_create_group(&pdev->dev.kobj,
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return sysfs_create_group(&pdev->dev.kobj,
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&lpss_attr_group);
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&lpss_attr_group);
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break;
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case BUS_NOTIFY_DEL_DEVICE:
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case BUS_NOTIFY_DEL_DEVICE:
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if (pdata->dev_desc->flags & LPSS_LTR)
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if (pdata->dev_desc->flags & LPSS_LTR)
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sysfs_remove_group(&pdev->dev.kobj, &lpss_attr_group);
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sysfs_remove_group(&pdev->dev.kobj, &lpss_attr_group);
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pdev->dev.pm_domain = NULL;
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break;
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default:
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default:
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break;
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break;
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}
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}
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@ -22,6 +22,7 @@
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#include <linux/mm.h>
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#include <linux/mm.h>
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#include <linux/module.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/slab.h>
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#include <linux/pm_runtime.h>
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#include "../dmaengine.h"
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#include "../dmaengine.h"
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#include "internal.h"
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#include "internal.h"
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@ -1504,6 +1505,9 @@ int dw_dma_probe(struct dw_dma_chip *chip, struct dw_dma_platform_data *pdata)
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dw->regs = chip->regs;
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dw->regs = chip->regs;
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chip->dw = dw;
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chip->dw = dw;
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pm_runtime_enable(chip->dev);
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pm_runtime_get_sync(chip->dev);
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dw_params = dma_read_byaddr(chip->regs, DW_PARAMS);
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dw_params = dma_read_byaddr(chip->regs, DW_PARAMS);
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autocfg = dw_params >> DW_PARAMS_EN & 0x1;
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autocfg = dw_params >> DW_PARAMS_EN & 0x1;
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@ -1667,11 +1671,14 @@ int dw_dma_probe(struct dw_dma_chip *chip, struct dw_dma_platform_data *pdata)
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dev_info(chip->dev, "DesignWare DMA Controller, %d channels\n",
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dev_info(chip->dev, "DesignWare DMA Controller, %d channels\n",
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nr_channels);
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nr_channels);
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pm_runtime_put_sync_suspend(chip->dev);
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return 0;
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return 0;
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err_dma_register:
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err_dma_register:
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free_irq(chip->irq, dw);
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free_irq(chip->irq, dw);
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err_pdata:
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err_pdata:
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pm_runtime_put_sync_suspend(chip->dev);
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return err;
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return err;
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}
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}
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EXPORT_SYMBOL_GPL(dw_dma_probe);
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EXPORT_SYMBOL_GPL(dw_dma_probe);
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@ -1681,6 +1688,8 @@ int dw_dma_remove(struct dw_dma_chip *chip)
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struct dw_dma *dw = chip->dw;
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struct dw_dma *dw = chip->dw;
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struct dw_dma_chan *dwc, *_dwc;
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struct dw_dma_chan *dwc, *_dwc;
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pm_runtime_get_sync(chip->dev);
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dw_dma_off(dw);
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dw_dma_off(dw);
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dma_async_device_unregister(&dw->dma);
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dma_async_device_unregister(&dw->dma);
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@ -1693,6 +1702,8 @@ int dw_dma_remove(struct dw_dma_chip *chip)
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channel_clear_bit(dw, CH_EN, dwc->mask);
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channel_clear_bit(dw, CH_EN, dwc->mask);
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}
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}
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pm_runtime_put_sync_suspend(chip->dev);
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pm_runtime_disable(chip->dev);
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return 0;
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return 0;
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}
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}
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EXPORT_SYMBOL_GPL(dw_dma_remove);
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EXPORT_SYMBOL_GPL(dw_dma_remove);
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