[v4,00/12] watchdog: s3c2410: Add Exynos850 support

Message

Sam Protsenko Nov. 21, 2021, 4:56 p.m. UTC

Exynos850 WDT IP-core differs a bit from existing platforms:
  - Another set of PMU registers
  - Separate WDT instance for each CPU cluster, having different PMU
    registers/bits
  - Source clock is different from PCLK

Implement all missing features above and enable Exynos850 WDT support.
While at it, do a bit of cleaning up.

Changes in v4:
  - Fixed build error when CONFIG_OF is disabled (found by 0-day)
  - Added R-b tag by Guenter Roeck to all patches

Changes in v3:
  - Renamed "samsung,index" property to more descriptive
    "samsung,cluster-index"
  - bindings: Disabled "samsung,cluster-index" property for SoCs other
    than Exynos850
  - Added quirks documentation
  - Removed has_src_clk field: clk framework can handle NULL clk; added
    s3c2410wdt_get_freq() function instead, to figure out which clock to
    use for getting the rate
  - Used pre-defined and completely set driver data for cluster0 and
    cluster1
  - Coding style changes
  - Added R-b tags

Changes in v2:
  - Added patch to fail probe if no valid timeout was found, as
    suggested by Guenter Roeck (03/12)
  - Extracted code for separating disable/mask functions into separate
    patch (06/12)
  - Added patch for inverting mask register value (07/12)
  - Extracted PMU cleanup code to separate patch, to ease the review and
    porting (09/12)
  - Added patch for removing not needed 'err' label in probe function
    (11/12)
  - Addressed all outstanding review comments on mailing list

Sam Protsenko (12):
  dt-bindings: watchdog: Require samsung,syscon-phandle for Exynos7
  dt-bindings: watchdog: Document Exynos850 watchdog bindings
  watchdog: s3c2410: Fail probe if can't find valid timeout
  watchdog: s3c2410: Let kernel kick watchdog
  watchdog: s3c2410: Make reset disable register optional
  watchdog: s3c2410: Extract disable and mask code into separate
    functions
  watchdog: s3c2410: Implement a way to invert mask reg value
  watchdog: s3c2410: Add support for WDT counter enable register
  watchdog: s3c2410: Cleanup PMU related code
  watchdog: s3c2410: Support separate source clock
  watchdog: s3c2410: Remove superfluous err label
  watchdog: s3c2410: Add Exynos850 support

 .../bindings/watchdog/samsung-wdt.yaml        |  48 ++-
 drivers/watchdog/s3c2410_wdt.c                | 324 +++++++++++++-----
 2 files changed, 289 insertions(+), 83 deletions(-)