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[v10,0/1] Add clkcfg driver for Microchip PolarFire SoC

Message ID 20220126154003.3797323-1-conor.dooley@microchip.com
Headers show
Series Add clkcfg driver for Microchip PolarFire SoC | expand

Message

Conor Dooley Jan. 26, 2022, 3:40 p.m. UTC 
From: Conor Dooley <conor.dooley@microchip.com>

This patch adds support for the clkcfg hardware block on the Microchip
PolarFire SoC

Changes since v9:
* removed devm_clk_get, replaced by index 0 clk_parent_data
* moved CLK_HW_INIT_x out of register functions
* dropped no longer needed name/flags/parent struct members
* added CLK_DIVIDER_ONE_BASED flags
* added rationale for critical clocks
* use lock directly
* dropped mpfs_periph_clk_recalc_rate
* dropped manual devm_ _unregisters
* dropped goto err in probe function
* dropped dt-binding

Changes since v8:
* Use devm_clk_hw_unregister directly
* Get parent clk in probe rather than register function

Changes since v7:
* Dropped clock-output-names again (oops)

Changes since v6:
* Dropped clock-output-names *as a required property*
* Dropped if(lock) check on spinlocks, added spinlocks to all
  read-modify-write register access
* Removed kfree()s on non-dynamically allocated variables
* Use devm_clk_get to get the reference clock
* Account for reserved clock when calculating the size of num_clks

Changes since v5:
* Dropped clock-output-names property

Major changes since v4:
* Adjusted license for microchip,mpfs-clock.h to match microchip,mpfs.yaml
* Corrected the number of clocks to 33 from 32

Major changes since v3:
* Patch reformatted so microchip,mpfs-clock.h is part of device-tree patch

Major changes since v2:
* In mpfs_cfg_clk_set_rate, return immediately if divider_get_val
    returns <0 
* rebased to v5.12-rc1

Major changes since v1:
 * Dependency on SOC_MICROCHIP_POLARFIRE
 * All references to PFSOC/pfsoc changed to MPFS/mpfs
 * Cleaned error handling in _probe
 * Re-ordered code to place structs et al at top

Daire McNamara (1):
  clk: microchip: Add driver for Microchip PolarFire SoC

 drivers/clk/Kconfig              |   4 +-
 drivers/clk/Makefile             |   2 +-
 drivers/clk/microchip/Kconfig    |  10 +
 drivers/clk/microchip/Makefile   |   1 +
 drivers/clk/microchip/clk-mpfs.c | 382 +++++++++++++++++++++++++++++++
 5 files changed, 395 insertions(+), 4 deletions(-)
 create mode 100644 drivers/clk/microchip/Kconfig
 create mode 100644 drivers/clk/microchip/clk-mpfs.c