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

Commit a3d411fb38c0 ("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 541527728341 ("PM: i2c-designware-platdrv: Suspend/resume at the
                     late/early stages")
Commit e6ce0ce34f65 ("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>

4 files changed, 8 insertions, 23 deletions

diff --git a/drivers/i2c/busses/i2c-designware-baytrail.c b/drivers/i2c/busses/i2c-designware-baytrail.c
index a2a275cfc1f6..9ca1feaba98f 100644
--- a/drivers/i2c/busses/i2c-designware-baytrail.c
+++ b/drivers/i2c/busses/i2c-designware-baytrail.c
@@ -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);
diff --git a/drivers/i2c/busses/i2c-designware-core.h b/drivers/i2c/busses/i2c-designware-core.h
index 5b550ab9a009..fb40d76639da 100644
--- a/drivers/i2c/busses/i2c-designware-core.h
+++ b/drivers/i2c/busses/i2c-designware-core.h
@@ -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);
diff --git a/drivers/i2c/busses/i2c-designware-master.c b/drivers/i2c/busses/i2c-designware-master.c
index 94d94b4a9a0d..2ccb527735f9 100644
--- a/drivers/i2c/busses/i2c-designware-master.c
+++ b/drivers/i2c/busses/i2c-designware-master.c
@@ -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;
diff --git a/drivers/i2c/busses/i2c-designware-platdrv.c b/drivers/i2c/busses/i2c-designware-platdrv.c
index a56af235e9a6..51cb17287c47 100644
--- a/drivers/i2c/busses/i2c-designware-platdrv.c
+++ b/drivers/i2c/busses/i2c-designware-platdrv.c
@@ -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);