On Sun, 07 Nov 2021 22:29:33 +0200, Sam Protsenko wrote:

Exynos850 SoC has two CPU clusters:
  - cluster 0: contains CPUs #0, #1, #2, #3
  - cluster 1: contains CPUs #4, #5, #6, #7

Each cluster has its own dedicated watchdog timer. Those WDT instances
are controlled using different bits in PMU registers, new
"samsung,index" property is added to tell the driver which bits to use
for defined watchdog node.

Also on Exynos850 the peripheral clock and the source clock are two
different clocks. Provide a way to specify two clocks in watchdog device
tree node.

Signed-off-by: Sam Protsenko <semen.protsenko@linaro.org>
---
Changes in v3:
  - Renamed "samsung,index" property to more descriptive
    "samsung,cluster-index"
  - Disabled "samsung,cluster-index" property for SoCs other than
    Exynos850

Changes in v2:
  - Stated explicitly that Exynos850 driver requires 2 clocks
  - Used single compatible for Exynos850
  - Added "index" property to specify CPU cluster index
  - Fixed a typo in commit message: dedicater -> dedicated

 .../bindings/watchdog/samsung-wdt.yaml        | 45 +++++++++++++++++--
 1 file changed, 41 insertions(+), 4 deletions(-)

Reviewed-by: Rob Herring <robh@kernel.org>