Merge series "Fix reset controls and RPM of NVIDIA Tegra ASoC drivers" from Dmitry Osipenko <digetx@gmail.com>:

Hi,

This series adds missing hardware reset controls to I2S and AC97 drivers,
corrects runtime PM usage and drivers probe/remove order. Currently drivers
happen to work properly because reset is implicitly deasserted by tegra-clk
driver, but clk driver shouldn't touch the resets and we need to fix it
because this breaks other Tegra drivers. Previously we fixed the resets of
the AHUB and HDMI codec drivers, but turned out that we missed the I2C and
AC97 drivers.

Thanks to Paul Fertser for testing the pending clk patches and finding
that audio got broken on Tegra20 AC100 netbook because of the missing I2S
reset.

Changelog:

v5: - After taking another look at the drivers I noticed couple more
      things that could be improved. These new patches correct runtime PM
      and probe/remove order of the drivers:

        ASoC: tegra20: spdif: Correct driver removal order
        ASoC: tegra20: spdif: Remove handing of disabled runtime PM
        ASoC: tegra20: i2s: Add system level suspend-resume callbacks
        ASoC: tegra20: i2s: Correct driver removal order
        ASoC: tegra20: i2s: Use devm_clk_get()
        ASoC: tegra20: i2s: Remove handing of disabled runtime PM
        ASoC: tegra30: i2s: Correct driver removal order
        ASoC: tegra30: i2s: Use devm_clk_get()
        ASoC: tegra30: i2s: Remove handing of disabled runtime PM
        ASoC: tegra30: ahub: Reset global variable
        ASoC: tegra30: ahub: Correct suspend-resume callbacks
        ASoC: tegra30: ahub: Remove handing of disabled runtime PM

v4: - Added missing prototype for reset_control_bulk_put().

v3: - Fixed reset stubs for !CONFIG_RESET_CONTROLLER.

v2: - After some more testing I found that I2S control logic doesn't require
      I2S clock to be enabled for resetting. Hence it's fine to have I2S to
      be reset by parent AHUB driver, so I dropped "tegra30: i2s: Add reset
      control" patch.

    - While I was double-checking resets on Tegra30, I found that that
      Tegra30 I2S driver has a broken runtime PM which doesn't restore
      hardware state on resume and it's lost after AHUB RPM-resume.
      Thus, added this new patch "tegra30: i2s: Restore hardware state
      on runtime PM resume".

    - Added new patches which switch AHUB driver to use reset-bulk API.
      I took the RFC patch from Philipp Zabel, fixed it and added
      devm_reset_control_bulk_optional_get_exclusive_released() that
      will be useful for further Tegra GPU patches. This is a minor
      improvement which makes code cleaner.

Dmitry Osipenko (16):
  ASoC: tegra20: ac97: Add reset control
  ASoC: tegra20: i2s: Add reset control
  ASoC: tegra30: i2s: Restore hardware state on runtime PM resume
  ASoC: tegra30: ahub: Switch to use reset-bulk API
  ASoC: tegra20: spdif: Correct driver removal order
  ASoC: tegra20: spdif: Remove handing of disabled runtime PM
  ASoC: tegra20: i2s: Add system level suspend-resume callbacks
  ASoC: tegra20: i2s: Correct driver removal order
  ASoC: tegra20: i2s: Use devm_clk_get()
  ASoC: tegra20: i2s: Remove handing of disabled runtime PM
  ASoC: tegra30: i2s: Correct driver removal order
  ASoC: tegra30: i2s: Use devm_clk_get()
  ASoC: tegra30: i2s: Remove handing of disabled runtime PM
  ASoC: tegra30: ahub: Reset global variable
  ASoC: tegra30: ahub: Correct suspend-resume callbacks
  ASoC: tegra30: ahub: Remove handing of disabled runtime PM

Philipp Zabel (1):
  reset: Add reset_control_bulk API

 drivers/reset/core.c            | 215 ++++++++++++++++++++++
 include/linux/reset.h           | 315 ++++++++++++++++++++++++++++++++
 sound/soc/tegra/tegra20_ac97.c  |  21 +++
 sound/soc/tegra/tegra20_ac97.h  |   1 +
 sound/soc/tegra/tegra20_i2s.c   |  60 +++---
 sound/soc/tegra/tegra20_i2s.h   |   1 +
 sound/soc/tegra/tegra20_spdif.c |  16 +-
 sound/soc/tegra/tegra30_ahub.c  | 168 ++++++-----------
 sound/soc/tegra/tegra30_ahub.h  |   5 +-
 sound/soc/tegra/tegra30_i2s.c   |  65 ++-----
 10 files changed, 667 insertions(+), 200 deletions(-)

--
2.30.2

base-commit: a38fd8748464831584a19438cbb3082b5a2dab15

1 files changed, 315 insertions, 0 deletions

diff --git a/include/linux/reset.h b/include/linux/reset.h
index b9109efa2a5c..46e6372cb431 100644
--- a/include/linux/reset.h
+++ b/include/linux/reset.h
@@ -10,6 +10,21 @@ struct device;
 struct device_node;
 struct reset_control;
 
+/**
+ * struct reset_control_bulk_data - Data used for bulk reset control operations.
+ *
+ * @id: reset control consumer ID
+ * @rstc: struct reset_control * to store the associated reset control
+ *
+ * The reset APIs provide a series of reset_control_bulk_*() API calls as
+ * a convenience to consumers which require multiple reset controls.
+ * This structure is used to manage data for these calls.
+ */
+struct reset_control_bulk_data {
+	const char			*id;
+	struct reset_control		*rstc;
+};
+
 #ifdef CONFIG_RESET_CONTROLLER
 
 int reset_control_reset(struct reset_control *rstc);
@@ -20,6 +35,12 @@ int reset_control_status(struct reset_control *rstc);
 int reset_control_acquire(struct reset_control *rstc);
 void reset_control_release(struct reset_control *rstc);
 
+int reset_control_bulk_reset(int num_rstcs, struct reset_control_bulk_data *rstcs);
+int reset_control_bulk_assert(int num_rstcs, struct reset_control_bulk_data *rstcs);
+int reset_control_bulk_deassert(int num_rstcs, struct reset_control_bulk_data *rstcs);
+int reset_control_bulk_acquire(int num_rstcs, struct reset_control_bulk_data *rstcs);
+void reset_control_bulk_release(int num_rstcs, struct reset_control_bulk_data *rstcs);
+
 struct reset_control *__of_reset_control_get(struct device_node *node,
 				     const char *id, int index, bool shared,
 				     bool optional, bool acquired);
@@ -27,10 +48,18 @@ struct reset_control *__reset_control_get(struct device *dev, const char *id,
 					  int index, bool shared,
 					  bool optional, bool acquired);
 void reset_control_put(struct reset_control *rstc);
+int __reset_control_bulk_get(struct device *dev, int num_rstcs,
+			     struct reset_control_bulk_data *rstcs,
+			     bool shared, bool optional, bool acquired);
+void reset_control_bulk_put(int num_rstcs, struct reset_control_bulk_data *rstcs);
+
 int __device_reset(struct device *dev, bool optional);
 struct reset_control *__devm_reset_control_get(struct device *dev,
 				     const char *id, int index, bool shared,
 				     bool optional, bool acquired);
+int __devm_reset_control_bulk_get(struct device *dev, int num_rstcs,
+				  struct reset_control_bulk_data *rstcs,
+				  bool shared, bool optional, bool acquired);
 
 struct reset_control *devm_reset_control_array_get(struct device *dev,
 						   bool shared, bool optional);
@@ -96,6 +125,48 @@ static inline struct reset_control *__reset_control_get(
 	return optional ? NULL : ERR_PTR(-ENOTSUPP);
 }
 
+static inline int
+reset_control_bulk_reset(int num_rstcs, struct reset_control_bulk_data *rstcs)
+{
+	return 0;
+}
+
+static inline int
+reset_control_bulk_assert(int num_rstcs, struct reset_control_bulk_data *rstcs)
+{
+	return 0;
+}
+
+static inline int
+reset_control_bulk_deassert(int num_rstcs, struct reset_control_bulk_data *rstcs)
+{
+	return 0;
+}
+
+static inline int
+reset_control_bulk_acquire(int num_rstcs, struct reset_control_bulk_data *rstcs)
+{
+	return 0;
+}
+
+static inline void
+reset_control_bulk_release(int num_rstcs, struct reset_control_bulk_data *rstcs)
+{
+}
+
+static inline int
+__reset_control_bulk_get(struct device *dev, int num_rstcs,
+			 struct reset_control_bulk_data *rstcs,
+			 bool shared, bool optional, bool acquired)
+{
+	return optional ? 0 : -EOPNOTSUPP;
+}
+
+static inline void
+reset_control_bulk_put(int num_rstcs, struct reset_control_bulk_data *rstcs)
+{
+}
+
 static inline struct reset_control *__devm_reset_control_get(
 					struct device *dev, const char *id,
 					int index, bool shared, bool optional,
@@ -104,6 +175,14 @@ static inline struct reset_control *__devm_reset_control_get(
 	return optional ? NULL : ERR_PTR(-ENOTSUPP);
 }
 
+static inline int
+__devm_reset_control_bulk_get(struct device *dev, int num_rstcs,
+			      struct reset_control_bulk_data *rstcs,
+			      bool shared, bool optional, bool acquired)
+{
+	return optional ? 0 : -EOPNOTSUPP;
+}
+
 static inline struct reset_control *
 devm_reset_control_array_get(struct device *dev, bool shared, bool optional)
 {
@@ -156,6 +235,23 @@ __must_check reset_control_get_exclusive(struct device *dev, const char *id)
 }
 
 /**
+ * reset_control_bulk_get_exclusive - Lookup and obtain exclusive references to
+ *                                    multiple reset controllers.
+ * @dev: device to be reset by the controller
+ * @num_rstcs: number of entries in rstcs array
+ * @rstcs: array of struct reset_control_bulk_data with reset line names set
+ *
+ * Fills the rstcs array with pointers to exclusive reset controls and
+ * returns 0, or an IS_ERR() condition containing errno.
+ */
+static inline int __must_check
+reset_control_bulk_get_exclusive(struct device *dev, int num_rstcs,
+				 struct reset_control_bulk_data *rstcs)
+{
+	return __reset_control_bulk_get(dev, num_rstcs, rstcs, false, false, true);
+}
+
+/**
  * reset_control_get_exclusive_released - Lookup and obtain a temoprarily
  *                                        exclusive reference to a reset
  *                                        controller.
@@ -177,6 +273,48 @@ __must_check reset_control_get_exclusive_released(struct device *dev,
 }
 
 /**
+ * reset_control_bulk_get_exclusive_released - Lookup and obtain temporarily
+ *                                    exclusive references to multiple reset
+ *                                    controllers.
+ * @dev: device to be reset by the controller
+ * @num_rstcs: number of entries in rstcs array
+ * @rstcs: array of struct reset_control_bulk_data with reset line names set
+ *
+ * Fills the rstcs array with pointers to exclusive reset controls and
+ * returns 0, or an IS_ERR() condition containing errno.
+ * reset-controls returned by this function must be acquired via
+ * reset_control_bulk_acquire() before they can be used and should be released
+ * via reset_control_bulk_release() afterwards.
+ */
+static inline int __must_check
+reset_control_bulk_get_exclusive_released(struct device *dev, int num_rstcs,
+					  struct reset_control_bulk_data *rstcs)
+{
+	return __reset_control_bulk_get(dev, num_rstcs, rstcs, false, false, false);
+}
+
+/**
+ * reset_control_bulk_get_optional_exclusive_released - Lookup and obtain optional
+ *                                    temporarily exclusive references to multiple
+ *                                    reset controllers.
+ * @dev: device to be reset by the controller
+ * @num_rstcs: number of entries in rstcs array
+ * @rstcs: array of struct reset_control_bulk_data with reset line names set
+ *
+ * Optional variant of reset_control_bulk_get_exclusive_released(). If the
+ * requested reset is not specified in the device tree, this function returns 0
+ * instead of an error and missing rtsc is set to NULL.
+ *
+ * See reset_control_bulk_get_exclusive_released() for more information.
+ */
+static inline int __must_check
+reset_control_bulk_get_optional_exclusive_released(struct device *dev, int num_rstcs,
+						   struct reset_control_bulk_data *rstcs)
+{
+	return __reset_control_bulk_get(dev, num_rstcs, rstcs, false, true, false);
+}
+
+/**
  * reset_control_get_shared - Lookup and obtain a shared reference to a
  *                            reset controller.
  * @dev: device to be reset by the controller
@@ -205,6 +343,23 @@ static inline struct reset_control *reset_control_get_shared(
 }
 
 /**
+ * reset_control_bulk_get_shared - Lookup and obtain shared references to
+ *                                 multiple reset controllers.
+ * @dev: device to be reset by the controller
+ * @num_rstcs: number of entries in rstcs array
+ * @rstcs: array of struct reset_control_bulk_data with reset line names set
+ *
+ * Fills the rstcs array with pointers to shared reset controls and
+ * returns 0, or an IS_ERR() condition containing errno.
+ */
+static inline int __must_check
+reset_control_bulk_get_shared(struct device *dev, int num_rstcs,
+			      struct reset_control_bulk_data *rstcs)
+{
+	return __reset_control_bulk_get(dev, num_rstcs, rstcs, true, false, false);
+}
+
+/**
  * reset_control_get_optional_exclusive - optional reset_control_get_exclusive()
  * @dev: device to be reset by the controller
  * @id: reset line name
@@ -222,6 +377,26 @@ static inline struct reset_control *reset_control_get_optional_exclusive(
 }
 
 /**
+ * reset_control_bulk_get_optional_exclusive - optional
+ *                                             reset_control_bulk_get_exclusive()
+ * @dev: device to be reset by the controller
+ * @num_rstcs: number of entries in rstcs array
+ * @rstcs: array of struct reset_control_bulk_data with reset line names set
+ *
+ * Optional variant of reset_control_bulk_get_exclusive(). If any of the
+ * requested resets are not specified in the device tree, this function sets
+ * them to NULL instead of returning an error.
+ *
+ * See reset_control_bulk_get_exclusive() for more information.
+ */
+static inline int __must_check
+reset_control_bulk_get_optional_exclusive(struct device *dev, int num_rstcs,
+					  struct reset_control_bulk_data *rstcs)
+{
+	return __reset_control_bulk_get(dev, num_rstcs, rstcs, false, true, true);
+}
+
+/**
  * reset_control_get_optional_shared - optional reset_control_get_shared()
  * @dev: device to be reset by the controller
  * @id: reset line name
@@ -239,6 +414,26 @@ static inline struct reset_control *reset_control_get_optional_shared(
 }
 
 /**
+ * reset_control_bulk_get_optional_shared - optional
+ *                                             reset_control_bulk_get_shared()
+ * @dev: device to be reset by the controller
+ * @num_rstcs: number of entries in rstcs array
+ * @rstcs: array of struct reset_control_bulk_data with reset line names set
+ *
+ * Optional variant of reset_control_bulk_get_shared(). If the requested resets
+ * are not specified in the device tree, this function sets them to NULL
+ * instead of returning an error.
+ *
+ * See reset_control_bulk_get_shared() for more information.
+ */
+static inline int __must_check
+reset_control_bulk_get_optional_shared(struct device *dev, int num_rstcs,
+				       struct reset_control_bulk_data *rstcs)
+{
+	return __reset_control_bulk_get(dev, num_rstcs, rstcs, true, true, false);
+}
+
+/**
  * of_reset_control_get_exclusive - Lookup and obtain an exclusive reference
  *                                  to a reset controller.
  * @node: device to be reset by the controller
@@ -344,6 +539,26 @@ __must_check devm_reset_control_get_exclusive(struct device *dev,
 }
 
 /**
+ * devm_reset_control_bulk_get_exclusive - resource managed
+ *                                         reset_control_bulk_get_exclusive()
+ * @dev: device to be reset by the controller
+ * @num_rstcs: number of entries in rstcs array
+ * @rstcs: array of struct reset_control_bulk_data with reset line names set
+ *
+ * Managed reset_control_bulk_get_exclusive(). For reset controllers returned
+ * from this function, reset_control_put() is called automatically on driver
+ * detach.
+ *
+ * See reset_control_bulk_get_exclusive() for more information.
+ */
+static inline int __must_check
+devm_reset_control_bulk_get_exclusive(struct device *dev, int num_rstcs,
+				      struct reset_control_bulk_data *rstcs)
+{
+	return __devm_reset_control_bulk_get(dev, num_rstcs, rstcs, false, false, true);
+}
+
+/**
  * devm_reset_control_get_exclusive_released - resource managed
  *                                             reset_control_get_exclusive_released()
  * @dev: device to be reset by the controller
@@ -363,6 +578,26 @@ __must_check devm_reset_control_get_exclusive_released(struct device *dev,
 }
 
 /**
+ * devm_reset_control_bulk_get_exclusive_released - resource managed
+ *                                                  reset_control_bulk_get_exclusive_released()
+ * @dev: device to be reset by the controller
+ * @num_rstcs: number of entries in rstcs array
+ * @rstcs: array of struct reset_control_bulk_data with reset line names set
+ *
+ * Managed reset_control_bulk_get_exclusive_released(). For reset controllers
+ * returned from this function, reset_control_put() is called automatically on
+ * driver detach.
+ *
+ * See reset_control_bulk_get_exclusive_released() for more information.
+ */
+static inline int __must_check
+devm_reset_control_bulk_get_exclusive_released(struct device *dev, int num_rstcs,
+					       struct reset_control_bulk_data *rstcs)
+{
+	return __devm_reset_control_bulk_get(dev, num_rstcs, rstcs, false, false, false);
+}
+
+/**
  * devm_reset_control_get_optional_exclusive_released - resource managed
  *                                                      reset_control_get_optional_exclusive_released()
  * @dev: device to be reset by the controller
@@ -382,6 +617,26 @@ __must_check devm_reset_control_get_optional_exclusive_released(struct device *d
 }
 
 /**
+ * devm_reset_control_bulk_get_optional_exclusive_released - resource managed
+ *                                                           reset_control_bulk_optional_get_exclusive_released()
+ * @dev: device to be reset by the controller
+ * @num_rstcs: number of entries in rstcs array
+ * @rstcs: array of struct reset_control_bulk_data with reset line names set
+ *
+ * Managed reset_control_bulk_optional_get_exclusive_released(). For reset
+ * controllers returned from this function, reset_control_put() is called
+ * automatically on driver detach.
+ *
+ * See reset_control_bulk_optional_get_exclusive_released() for more information.
+ */
+static inline int __must_check
+devm_reset_control_bulk_get_optional_exclusive_released(struct device *dev, int num_rstcs,
+							struct reset_control_bulk_data *rstcs)
+{
+	return __devm_reset_control_bulk_get(dev, num_rstcs, rstcs, false, true, false);
+}
+
+/**
  * devm_reset_control_get_shared - resource managed reset_control_get_shared()
  * @dev: device to be reset by the controller
  * @id: reset line name
@@ -397,6 +652,26 @@ static inline struct reset_control *devm_reset_control_get_shared(
 }
 
 /**
+ * devm_reset_control_bulk_get_shared - resource managed
+ *                                      reset_control_bulk_get_shared()
+ * @dev: device to be reset by the controller
+ * @num_rstcs: number of entries in rstcs array
+ * @rstcs: array of struct reset_control_bulk_data with reset line names set
+ *
+ * Managed reset_control_bulk_get_shared(). For reset controllers returned
+ * from this function, reset_control_put() is called automatically on driver
+ * detach.
+ *
+ * See reset_control_bulk_get_shared() for more information.
+ */
+static inline int __must_check
+devm_reset_control_bulk_get_shared(struct device *dev, int num_rstcs,
+				   struct reset_control_bulk_data *rstcs)
+{
+	return __devm_reset_control_bulk_get(dev, num_rstcs, rstcs, true, false, false);
+}
+
+/**
  * devm_reset_control_get_optional_exclusive - resource managed
  *                                             reset_control_get_optional_exclusive()
  * @dev: device to be reset by the controller
@@ -415,6 +690,26 @@ static inline struct reset_control *devm_reset_control_get_optional_exclusive(
 }
 
 /**
+ * devm_reset_control_bulk_get_optional_exclusive - resource managed
+ *                                                  reset_control_bulk_get_optional_exclusive()
+ * @dev: device to be reset by the controller
+ * @num_rstcs: number of entries in rstcs array
+ * @rstcs: array of struct reset_control_bulk_data with reset line names set
+ *
+ * Managed reset_control_bulk_get_optional_exclusive(). For reset controllers
+ * returned from this function, reset_control_put() is called automatically on
+ * driver detach.
+ *
+ * See reset_control_bulk_get_optional_exclusive() for more information.
+ */
+static inline int __must_check
+devm_reset_control_bulk_get_optional_exclusive(struct device *dev, int num_rstcs,
+					       struct reset_control_bulk_data *rstcs)
+{
+	return __devm_reset_control_bulk_get(dev, num_rstcs, rstcs, true, false, true);
+}
+
+/**
  * devm_reset_control_get_optional_shared - resource managed
  *                                          reset_control_get_optional_shared()
  * @dev: device to be reset by the controller
@@ -433,6 +728,26 @@ static inline struct reset_control *devm_reset_control_get_optional_shared(
 }
 
 /**
+ * devm_reset_control_bulk_get_optional_shared - resource managed
+ *                                               reset_control_bulk_get_optional_shared()
+ * @dev: device to be reset by the controller
+ * @num_rstcs: number of entries in rstcs array
+ * @rstcs: array of struct reset_control_bulk_data with reset line names set
+ *
+ * Managed reset_control_bulk_get_optional_shared(). For reset controllers
+ * returned from this function, reset_control_put() is called automatically on
+ * driver detach.
+ *
+ * See reset_control_bulk_get_optional_shared() for more information.
+ */
+static inline int __must_check
+devm_reset_control_bulk_get_optional_shared(struct device *dev, int num_rstcs,
+					    struct reset_control_bulk_data *rstcs)
+{
+	return __devm_reset_control_bulk_get(dev, num_rstcs, rstcs, true, true, false);
+}
+
+/**
  * devm_reset_control_get_exclusive_by_index - resource managed
  *                                             reset_control_get_exclusive()
  * @dev: device to be reset by the controller