Merge tag 'samsung-drivers-5.17' of git://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux into arm/drivers

Samsung SoC drivers changes for v5.17

1. Exynos ChipID: add Exynos7885 support.
2. Exynos PMU: add Exynos850 support.
3. Minor bindings cleanup.
4. Add Exynos USIv2 (Universal Serial Interface) driver. The USI block is
   a shared IP block between I2C, UART/serial and SPI. Basically one has
   to choose which feature the USI block will support and later the
   regular I2C/serial/SPI driver will bind and work.
   This merges also one commit with dt-binding headers from my dts64
   pull request.

   Together with a future serial driver change, this will break the ABI.

   Affected: Serial on ExynosAutov9 SADK and out-of-tree ExynosAutov9 boards

   Why: To properly and efficiently support the USI with new hierarchy
   of USI-{serial,SPI,I2C} devicetree nodes.

   Rationale:
   Recently added serial and USI support was short-sighted and did not
   allow to smooth support of other features (SPI and I2C). Adding
   support for USI-SPI and USI-I2C would effect in code duplication.
   Adding support for different USI versions (currently supported is
   USIv2 but support for v1 is planned) would cause even more code
   duplication and create a solution difficult to maintain.
   Since USI-serial and ExynosAutov9 have been added recently, are
   considered fresh development features and there are no supported
   products using them, the code/solution is being refactored in
   non-backwards compatible way.  The compatibility is not broken yet.
   It will be when serial driver changes are accepted.
   The ABI break was discussed with only known users of ExynosAutov9 and
   received their permission.

* tag 'samsung-drivers-5.17' of git://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux:
  dt-bindings: soc: samsung: keep SoC driver bindings together
  soc: samsung: Add USI driver
  dt-bindings: soc: samsung: Add Exynos USI bindings
  soc: samsung: exynos-pmu: Add Exynos850 support
  dt-bindings: samsung: pmu: Document Exynos850
  soc: samsung: exynos-chipid: add Exynos7885 SoC support
  soc: samsung: exynos-chipid: describe which SoCs go with compatibles

Link: https://lore.kernel.org/r/20211220115405.30434-2-krzysztof.kozlowski@canonical.com
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

1 files changed, 17 insertions, 0 deletions

diff --git a/include/dt-bindings/soc/samsung,exynos-usi.h b/include/dt-bindings/soc/samsung,exynos-usi.h
new file mode 100644
index 000000000000..a01af169d249
--- /dev/null
+++ b/include/dt-bindings/soc/samsung,exynos-usi.h
@@ -0,0 +1,17 @@
+/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */
+/*
+ * Copyright (c) 2021 Linaro Ltd.
+ * Author: Sam Protsenko <semen.protsenko@linaro.org>
+ *
+ * Device Tree bindings for Samsung Exynos USI (Universal Serial Interface).
+ */
+
+#ifndef __DT_BINDINGS_SAMSUNG_EXYNOS_USI_H
+#define __DT_BINDINGS_SAMSUNG_EXYNOS_USI_H
+
+#define USI_V2_NONE		0
+#define USI_V2_UART		1
+#define USI_V2_SPI		2
+#define USI_V2_I2C		3
+
+#endif /* __DT_BINDINGS_SAMSUNG_EXYNOS_USI_H */