Add cs42l43 PC focused SoundWire CODEC

Merge series from Charles Keepax <ckeepax@opensource.cirrus.com>:

This patch chain adds support for the Cirrus Logic cs42l43 PC focused
SoundWire CODEC. The chain is currently based of Lee's for-mfd-next
branch.

This series is mostly just a resend keeping pace with the kernel under
it, except for a minor fixup in the ASoC stuff.

Thanks,
Charles

Charles Keepax (4):
  dt-bindings: mfd: cirrus,cs42l43: Add initial DT binding
  mfd: cs42l43: Add support for cs42l43 core driver
  pinctrl: cs42l43: Add support for the cs42l43
  ASoC: cs42l43: Add support for the cs42l43

Lucas Tanure (2):
  soundwire: bus: Allow SoundWire peripherals to register IRQ handlers
  spi: cs42l43: Add SPI controller support

 .../bindings/sound/cirrus,cs42l43.yaml        |  313 +++
 MAINTAINERS                                   |    4 +
 drivers/mfd/Kconfig                           |   23 +
 drivers/mfd/Makefile                          |    3 +
 drivers/mfd/cs42l43-i2c.c                     |   98 +
 drivers/mfd/cs42l43-sdw.c                     |  239 ++
 drivers/mfd/cs42l43.c                         | 1188 +++++++++
 drivers/mfd/cs42l43.h                         |   28 +
 drivers/pinctrl/cirrus/Kconfig                |   11 +
 drivers/pinctrl/cirrus/Makefile               |    2 +
 drivers/pinctrl/cirrus/pinctrl-cs42l43.c      |  609 +++++
 drivers/soundwire/bus.c                       |   32 +
 drivers/soundwire/bus_type.c                  |   12 +
 drivers/spi/Kconfig                           |    7 +
 drivers/spi/Makefile                          |    1 +
 drivers/spi/spi-cs42l43.c                     |  284 ++
 include/linux/mfd/cs42l43-regs.h              | 1184 +++++++++
 include/linux/mfd/cs42l43.h                   |  102 +
 include/linux/soundwire/sdw.h                 |    9 +
 include/sound/cs42l43.h                       |   17 +
 sound/soc/codecs/Kconfig                      |   16 +
 sound/soc/codecs/Makefile                     |    4 +
 sound/soc/codecs/cs42l43-jack.c               |  946 +++++++
 sound/soc/codecs/cs42l43-sdw.c                |   74 +
 sound/soc/codecs/cs42l43.c                    | 2278 +++++++++++++++++
 sound/soc/codecs/cs42l43.h                    |  131 +
 26 files changed, 7615 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/sound/cirrus,cs42l43.yaml
 create mode 100644 drivers/mfd/cs42l43-i2c.c
 create mode 100644 drivers/mfd/cs42l43-sdw.c
 create mode 100644 drivers/mfd/cs42l43.c
 create mode 100644 drivers/mfd/cs42l43.h
 create mode 100644 drivers/pinctrl/cirrus/pinctrl-cs42l43.c
 create mode 100644 drivers/spi/spi-cs42l43.c
 create mode 100644 include/linux/mfd/cs42l43-regs.h
 create mode 100644 include/linux/mfd/cs42l43.h
 create mode 100644 include/sound/cs42l43.h
 create mode 100644 sound/soc/codecs/cs42l43-jack.c
 create mode 100644 sound/soc/codecs/cs42l43-sdw.c
 create mode 100644 sound/soc/codecs/cs42l43.c
 create mode 100644 sound/soc/codecs/cs42l43.h

--
2.30.2

1 files changed, 51 insertions, 24 deletions

diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 64a3239b6407..6da626bfb52e 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -1579,9 +1579,37 @@ static inline void destroy_compound_gigantic_folio(struct folio *folio,
 						unsigned int order) { }
 #endif
 
+static inline void __clear_hugetlb_destructor(struct hstate *h,
+						struct folio *folio)
+{
+	lockdep_assert_held(&hugetlb_lock);
+
+	/*
+	 * Very subtle
+	 *
+	 * For non-gigantic pages set the destructor to the normal compound
+	 * page dtor.  This is needed in case someone takes an additional
+	 * temporary ref to the page, and freeing is delayed until they drop
+	 * their reference.
+	 *
+	 * For gigantic pages set the destructor to the null dtor.  This
+	 * destructor will never be called.  Before freeing the gigantic
+	 * page destroy_compound_gigantic_folio will turn the folio into a
+	 * simple group of pages.  After this the destructor does not
+	 * apply.
+	 *
+	 */
+	if (hstate_is_gigantic(h))
+		folio_set_compound_dtor(folio, NULL_COMPOUND_DTOR);
+	else
+		folio_set_compound_dtor(folio, COMPOUND_PAGE_DTOR);
+}
+
 /*
- * Remove hugetlb folio from lists, and update dtor so that the folio appears
- * as just a compound page.
+ * Remove hugetlb folio from lists.
+ * If vmemmap exists for the folio, update dtor so that the folio appears
+ * as just a compound page.  Otherwise, wait until after allocating vmemmap
+ * to update dtor.
  *
  * A reference is held on the folio, except in the case of demote.
  *
@@ -1612,31 +1640,19 @@ static void __remove_hugetlb_folio(struct hstate *h, struct folio *folio,
 	}
 
 	/*
-	 * Very subtle
-	 *
-	 * For non-gigantic pages set the destructor to the normal compound
-	 * page dtor.  This is needed in case someone takes an additional
-	 * temporary ref to the page, and freeing is delayed until they drop
-	 * their reference.
-	 *
-	 * For gigantic pages set the destructor to the null dtor.  This
-	 * destructor will never be called.  Before freeing the gigantic
-	 * page destroy_compound_gigantic_folio will turn the folio into a
-	 * simple group of pages.  After this the destructor does not
-	 * apply.
-	 *
-	 * This handles the case where more than one ref is held when and
-	 * after update_and_free_hugetlb_folio is called.
-	 *
-	 * In the case of demote we do not ref count the page as it will soon
-	 * be turned into a page of smaller size.
+	 * We can only clear the hugetlb destructor after allocating vmemmap
+	 * pages.  Otherwise, someone (memory error handling) may try to write
+	 * to tail struct pages.
+	 */
+	if (!folio_test_hugetlb_vmemmap_optimized(folio))
+		__clear_hugetlb_destructor(h, folio);
+
+	 /*
+	  * In the case of demote we do not ref count the page as it will soon
+	  * be turned into a page of smaller size.
 	 */
 	if (!demote)
 		folio_ref_unfreeze(folio, 1);
-	if (hstate_is_gigantic(h))
-		folio_set_compound_dtor(folio, NULL_COMPOUND_DTOR);
-	else
-		folio_set_compound_dtor(folio, COMPOUND_PAGE_DTOR);
 
 	h->nr_huge_pages--;
 	h->nr_huge_pages_node[nid]--;
@@ -1705,6 +1721,7 @@ static void __update_and_free_hugetlb_folio(struct hstate *h,
 {
 	int i;
 	struct page *subpage;
+	bool clear_dtor = folio_test_hugetlb_vmemmap_optimized(folio);
 
 	if (hstate_is_gigantic(h) && !gigantic_page_runtime_supported())
 		return;
@@ -1735,6 +1752,16 @@ static void __update_and_free_hugetlb_folio(struct hstate *h,
 	if (unlikely(folio_test_hwpoison(folio)))
 		folio_clear_hugetlb_hwpoison(folio);
 
+	/*
+	 * If vmemmap pages were allocated above, then we need to clear the
+	 * hugetlb destructor under the hugetlb lock.
+	 */
+	if (clear_dtor) {
+		spin_lock_irq(&hugetlb_lock);
+		__clear_hugetlb_destructor(h, folio);
+		spin_unlock_irq(&hugetlb_lock);
+	}
+
 	for (i = 0; i < pages_per_huge_page(h); i++) {
 		subpage = folio_page(folio, i);
 		subpage->flags &= ~(1 << PG_locked | 1 << PG_error |