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i2c: designware: Remove Cherry Trail PMIC I2C bus pm_disabled workaround 

Commit a3d411fb38 ("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:

Commit 5415277283 ("PM: i2c-designware-platdrv: Suspend/resume at the
                     late/early stages")
Commit e6ce0ce34f ("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>
hifive-unleashed-5.1
Hans de Goede 2018-09-05 21:51:31 +02:00 committed by Wolfram Sang
parent 1bb3995962
commit 9cbeeca050
4 changed files with 8 additions and 23 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/i2c/busses/i2c-designware-baytrail.c
View File

@ -164,7 +164,7 @@ int i2c_dw_probe_lock_support(struct dw_i2c_dev *dev)
dev_info(dev->dev, "I2C bus managed by PUNIT\n");
dev->acquire_lock = baytrail_i2c_acquire;
dev->release_lock = baytrail_i2c_release;
dev->pm_disabled = true;
dev->shared_with_punit = true;
pm_qos_add_request(&dev->pm_qos, PM_QOS_CPU_DMA_LATENCY,
PM_QOS_DEFAULT_VALUE);

4
drivers/i2c/busses/i2c-designware-core.h
View File

@ -212,7 +212,7 @@
* @pm_qos: pm_qos_request used while holding a hardware lock on the bus
* @acquire_lock: function to acquire a hardware lock on the bus
* @release_lock: function to release a hardware lock on the bus
* @pm_disabled: true if power-management should be disabled for this i2c-bus
* @shared_with_punit: true if this bus is shared with the SoCs PUNIT
* @disable: function to disable the controller
* @disable_int: function to disable all interrupts
* @init: function to initialize the I2C hardware
@ -266,7 +266,7 @@ struct dw_i2c_dev {
struct pm_qos_request pm_qos;
int (*acquire_lock)(struct dw_i2c_dev *dev);
void (*release_lock)(struct dw_i2c_dev *dev);
bool pm_disabled;
bool shared_with_punit;
void (*disable)(struct dw_i2c_dev *dev);
void (*disable_int)(struct dw_i2c_dev *dev);
int (*init)(struct dw_i2c_dev *dev);

2
drivers/i2c/busses/i2c-designware-master.c
View File

@ -707,7 +707,7 @@ int i2c_dw_probe(struct dw_i2c_dev *dev)
adap->dev.parent = dev->dev;
i2c_set_adapdata(adap, dev);
if (dev->pm_disabled) {
if (dev->shared_with_punit) {
irq_flags = IRQF_NO_SUSPEND;
} else {
irq_flags = IRQF_SHARED | IRQF_COND_SUSPEND;

23
drivers/i2c/busses/i2c-designware-platdrv.c
View File

@ -85,9 +85,6 @@ static int dw_i2c_acpi_configure(struct platform_device *pdev)
struct dw_i2c_dev *dev = platform_get_drvdata(pdev);
struct i2c_timings *t = &dev->timings;
u32 ss_ht = 0, fp_ht = 0, hs_ht = 0, fs_ht = 0;
acpi_handle handle = ACPI_HANDLE(&pdev->dev);
struct acpi_device *adev;
const char *uid;
dev->adapter.nr = -1;
dev->tx_fifo_depth = 32;
@ -118,18 +115,6 @@ static int dw_i2c_acpi_configure(struct platform_device *pdev)
break;
}
if (acpi_bus_get_device(handle, &adev))
return -ENODEV;
/*
* Cherrytrail I2C7 gets used for the PMIC which gets accessed
* through ACPI opregions during late suspend / early resume
* disable pm for it.
*/
uid = adev->pnp.unique_id;
if ((dev->flags & MODEL_CHERRYTRAIL) && !strcmp(uid, "7"))
dev->pm_disabled = true;
return 0;
}
@ -261,7 +246,7 @@ static void dw_i2c_plat_pm_cleanup(struct dw_i2c_dev *dev)
{
pm_runtime_disable(dev->dev);
if (dev->pm_disabled)
if (dev->shared_with_punit)
pm_runtime_put_noidle(dev->dev);
}
@ -393,7 +378,7 @@ static int dw_i2c_plat_probe(struct platform_device *pdev)
pm_runtime_use_autosuspend(&pdev->dev);
pm_runtime_set_active(&pdev->dev);
if (dev->pm_disabled)
if (dev->shared_with_punit)
pm_runtime_get_noresume(&pdev->dev);
pm_runtime_enable(&pdev->dev);
@ -471,7 +456,7 @@ static int dw_i2c_plat_suspend(struct device *dev)
{
struct dw_i2c_dev *i_dev = dev_get_drvdata(dev);
if (i_dev->pm_disabled)
if (i_dev->shared_with_punit)
return 0;
i_dev->disable(i_dev);
@ -484,7 +469,7 @@ static int dw_i2c_plat_resume(struct device *dev)
{
struct dw_i2c_dev *i_dev = dev_get_drvdata(dev);
if (!i_dev->pm_disabled)
if (!i_dev->shared_with_punit)
i2c_dw_prepare_clk(i_dev, true);
i_dev->init(i_dev);