forked from Minki/linux
i2c: designware: Remove Cherry Trail PMIC I2C bus pm_disabled workaround
Commita3d411fb38
("i2c: designware: Disable pm for PMIC i2c-bus even if there is no _SEM method"), always set the pm_disabled flag on the I2C7 controller, even if its bus was not shared with the PUNIT. This was a workaround for various suspend/resume issues, after the following 2 commits this workaround is no longer necessary: Commit5415277283
("PM: i2c-designware-platdrv: Suspend/resume at the late/early stages") Commite6ce0ce34f
("ACPI / LPSS: Add device link for CHT SD card dependency on I2C") Therefor this commit removes this workaround. After this commit the pm_disabled flag is only used to indicate that the bus is shared with the PUNIT and after other recent changes we no longer call dev_pm_syscore_device(dev, true), so we are no longer actually disabling (non-runtime) pm, so this commit also renames the flag to shared_with_punit to better reflect what it is for. Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Jarkko Nikula <jarkko.nikula@linux.intel.com> Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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@ -164,7 +164,7 @@ int i2c_dw_probe_lock_support(struct dw_i2c_dev *dev)
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dev_info(dev->dev, "I2C bus managed by PUNIT\n");
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dev->acquire_lock = baytrail_i2c_acquire;
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dev->release_lock = baytrail_i2c_release;
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dev->pm_disabled = true;
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dev->shared_with_punit = true;
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pm_qos_add_request(&dev->pm_qos, PM_QOS_CPU_DMA_LATENCY,
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PM_QOS_DEFAULT_VALUE);
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@ -212,7 +212,7 @@
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* @pm_qos: pm_qos_request used while holding a hardware lock on the bus
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* @acquire_lock: function to acquire a hardware lock on the bus
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* @release_lock: function to release a hardware lock on the bus
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* @pm_disabled: true if power-management should be disabled for this i2c-bus
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* @shared_with_punit: true if this bus is shared with the SoCs PUNIT
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* @disable: function to disable the controller
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* @disable_int: function to disable all interrupts
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* @init: function to initialize the I2C hardware
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@ -266,7 +266,7 @@ struct dw_i2c_dev {
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struct pm_qos_request pm_qos;
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int (*acquire_lock)(struct dw_i2c_dev *dev);
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void (*release_lock)(struct dw_i2c_dev *dev);
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bool pm_disabled;
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bool shared_with_punit;
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void (*disable)(struct dw_i2c_dev *dev);
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void (*disable_int)(struct dw_i2c_dev *dev);
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int (*init)(struct dw_i2c_dev *dev);
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@ -707,7 +707,7 @@ int i2c_dw_probe(struct dw_i2c_dev *dev)
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adap->dev.parent = dev->dev;
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i2c_set_adapdata(adap, dev);
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if (dev->pm_disabled) {
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if (dev->shared_with_punit) {
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irq_flags = IRQF_NO_SUSPEND;
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} else {
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irq_flags = IRQF_SHARED | IRQF_COND_SUSPEND;
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@ -85,9 +85,6 @@ static int dw_i2c_acpi_configure(struct platform_device *pdev)
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struct dw_i2c_dev *dev = platform_get_drvdata(pdev);
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struct i2c_timings *t = &dev->timings;
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u32 ss_ht = 0, fp_ht = 0, hs_ht = 0, fs_ht = 0;
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acpi_handle handle = ACPI_HANDLE(&pdev->dev);
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struct acpi_device *adev;
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const char *uid;
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dev->adapter.nr = -1;
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dev->tx_fifo_depth = 32;
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@ -118,18 +115,6 @@ static int dw_i2c_acpi_configure(struct platform_device *pdev)
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break;
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}
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if (acpi_bus_get_device(handle, &adev))
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return -ENODEV;
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/*
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* Cherrytrail I2C7 gets used for the PMIC which gets accessed
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* through ACPI opregions during late suspend / early resume
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* disable pm for it.
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*/
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uid = adev->pnp.unique_id;
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if ((dev->flags & MODEL_CHERRYTRAIL) && !strcmp(uid, "7"))
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dev->pm_disabled = true;
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return 0;
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}
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@ -261,7 +246,7 @@ static void dw_i2c_plat_pm_cleanup(struct dw_i2c_dev *dev)
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{
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pm_runtime_disable(dev->dev);
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if (dev->pm_disabled)
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if (dev->shared_with_punit)
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pm_runtime_put_noidle(dev->dev);
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}
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@ -393,7 +378,7 @@ static int dw_i2c_plat_probe(struct platform_device *pdev)
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pm_runtime_use_autosuspend(&pdev->dev);
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pm_runtime_set_active(&pdev->dev);
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if (dev->pm_disabled)
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if (dev->shared_with_punit)
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pm_runtime_get_noresume(&pdev->dev);
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pm_runtime_enable(&pdev->dev);
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@ -471,7 +456,7 @@ static int dw_i2c_plat_suspend(struct device *dev)
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{
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struct dw_i2c_dev *i_dev = dev_get_drvdata(dev);
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if (i_dev->pm_disabled)
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if (i_dev->shared_with_punit)
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return 0;
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i_dev->disable(i_dev);
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@ -484,7 +469,7 @@ static int dw_i2c_plat_resume(struct device *dev)
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{
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struct dw_i2c_dev *i_dev = dev_get_drvdata(dev);
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if (!i_dev->pm_disabled)
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if (!i_dev->shared_with_punit)
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i2c_dw_prepare_clk(i_dev, true);
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i_dev->init(i_dev);
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