clk: add support for TI CDCE6214

The CDCE6214 is a Ultra-Low Power Clock Generator With One PLL, Four
Differential Outputs, Two Inputs, and Internal EEPROM.

This series adds a common clk framework driver for this chip along with
the dt-bindings document. The cdce6214 needs several pins to be
configured for different input/output modes which are abstracted with a
pinctrl driver.

In v5 I tried to split up the patch into a non controversial part (to be
applied) and a part which needs more discussion (to be applied later).
That was not very well received, so I merged it back in v6. I didn't
mention that explicitly in v6, so doing it now.

v7 contains only small changes, mostly binding updates requested by Rob.

Sascha

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
Changes in v7:
- add missing blank line between properties in binding (Rob)
- drop unnecessary #size-cells #address-cells in binding (Rob)
- add vendor prefix to custom properties (Rob)
- Use standard units where appropriate (Rob)
- add dependency to PINCTRL and select GENERIC_PINCONF (0day bot)
- re-add missing SPDX in ti,cdce6214.h
- Link to v6: https://lore.kernel.org/r/20250903-clk-cdce6214-v6-0-b2cc...

Changes in v6:
- merge split up patches back together (forgot to mention when sending v6)
- use pinctrl subsystem to configure pins
- Link to v5: https://lore.kernel.org/r/20250618-clk-cdce6214-v5-0-9938...

Changes in v5:
- Reword commit message for binding patch (Krzysztof)
- Make clock binding yaml simpler (Krzysztof)
- add link to datasheet to driver code (Stephen)
- Drop inclusion of linux/clk.h (Stephen)
- Add missing #include <linux/bitfield.h> (Kernel test robot)
- simplify cdce6214_clk_out0_get_parent() (Stephen)
- Use divider_get_val() where appropriate (Stephen)
- Add Rxx defines for registers (Stephen)
- Add define for magic value 24 (Stephen)
- introduce and use cdce6214_clk_psx_mask() (Stephen)
- Use clamp() instead of open code (Stephen)
- declare const arrays const (Stephen)
- more use of dev_err_probe() (Stephen)
- use determine_rate() instead of round_rate (Stephen)
- split out pin configuration to separate patches
- Link to v4: https://lore.kernel.org/r/20250430-clk-cdce6214-v4-0-9f15...

Changes in v4:
- add missing '>' modifier in include/dt-bindings/clock/ti,cdce6214.h
- fix clocks maxItems should be 2
- add missing license in include/dt-bindings/clock/ti,cdce6214.h
- Fix checkpatch issues
- Link to v3: https://lore.kernel.org/r/20250410-clk-cdce6214-v3-0-d73c...

Changes in v3:
- Use string properties instead of int for enums
- Use units from property-units in dtschema
- Link to v2: https://lore.kernel.org/r/20250409-clk-cdce6214-v2-0-40b2...

Changes in v2:
- Use consistent quotes in binding document
- make clock-names an enum to make each clock fully optional
- drop '|' in binding description where not needed
- encode clock input mode into integer
- encode clock output mode into integer
- do not use defines for reg properties
- support setting load capacity for the oscillator via device tree
- support setting Bias current for the oscillator via device tree
- support setting polarities of CMOS outputs via device tree
- fix compatible string in driver
- remove unused struct cdce6214_config
- Link to v1: https://lore.kernel.org/r/20250408-clk-cdce6214-v1-0-bd4e...

---
Sascha Hauer (2):
      dt-bindings: clock: add TI CDCE6214 binding
      clk: add TI CDCE6214 clock driver

 .../devicetree/bindings/clock/ti,cdce6214.yaml     |  192 +++
 drivers/clk/Kconfig                                |    9 +
 drivers/clk/Makefile                               |    1 +
 drivers/clk/clk-cdce6214.c                         | 1620 ++++++++++++++++++++
 include/dt-bindings/clock/ti,cdce6214.h            |   25 +
 5 files changed, 1847 insertions(+)
---
base-commit: e5f0a698b34ed76002dc5cff3804a61c80233a7a
change-id: 20250408-clk-cdce6214-0c74043dc267

Best regards,
-- 
Sascha Hauer <s.hauer@pengutronix.de>