This patch series adds a PWM driver and DT documentation for HiFive Unleashed board. The patches are mostly based on Wesley's patch.
This patchset is based on Linux v5.2-rc1 and tested on HiFive Unleashed board with additional board related patches needed for testing can be found at dev/yashs/pwm_v13 branch of: https://github.com/yashshah7/riscv-linux.git v13 - Rebased onto Mainline v5.2-rc1 - Correct the order of pwmchip_remove() after clk_disable() in .remove() v12 - Rebased onto Mainline v5.1 v11 - Change naming convention for pwm_device and pwm_sifive_ddata pointers - Assign of_pwm_xlate_with_flag() to of_xlate func ptr since this driver use three pwm-cells (Issue reported by Andreas Schwab <sch...@suse.de> - Other minor fixes v10 - Use DIV_ROUND_CLOSEST_ULL instead of div_u64_round - Change 'num' defination to u64 bit (in pwm_sifive_apply). - Remove the usage of pwm_get_state() v9 - Use appropriate bitfield macros - Add approx_period in pwm_sifive_ddata struct and related changes - Correct the eqn for calculation of frac (in pwm_sifive_apply) - Other minor fixes v8 - Typo corrections - Remove active_user and related code - Do not clear PWM_SIFIVE_PWMCFG_EN_ALWAYS - Other minor fixes v7 - Modify description of compatible property in DT documentation - Use mutex locks at appropriate places - Fix all bad line breaks - Allow enabling/disabling PWM only when the user is the only active user - Remove Deglitch logic - Other minor fixes v6 - Remove the global property 'sifive,period-ns' - Implement free and request callbacks to maintain user counts. - Add user_count member to struct pwm_sifive_ddata - Allow period change only if user_count is one - Add pwm_sifive_enable function to enable/disable PWM - Change calculation logic of frac (in pwm_sifive_apply) - Remove state correction - Remove pwm_sifive_xlate function - Clock to be enabled only when PWM is enabled - Other minor fixes v5 - Correct the order of compatible string properties - PWM state correction to be done always - Other minor fixes based upon feedback on v4 v4 - Rename macros with appropriate names - Remove unused macros - Rename struct sifive_pwm_device to struct pwm_sifive_ddata - Rename function prefix as per driver name - Other minor fixes based upon feedback on v3 v3 - Add a link to the reference manaul - Use appropriate apis for division operation - Add check for polarity - Enable clk before calling clk_get_rate - Other minor fixes based upon feedback on v2 V2 changed from V1: - Remove inclusion of dt-bindings/pwm/pwm.h - Remove artificial alignments - Replace ioread32/iowrite32 with readl/writel - Remove camelcase - Change dev_info to dev_dbg for unnecessary log - Correct typo in driver name - Remove use of of_match_ptr macro - Update the DT compatible strings and Add reference to a common versioning document Yash Shah (2): pwm: sifive: Add DT documentation for SiFive PWM Controller pwm: sifive: Add a driver for SiFive SoC PWM .../devicetree/bindings/pwm/pwm-sifive.txt | 33 ++ drivers/pwm/Kconfig | 11 + drivers/pwm/Makefile | 1 + drivers/pwm/pwm-sifive.c | 339 +++++++++++++++++++++ 4 files changed, 384 insertions(+) create mode 100644 Documentation/devicetree/bindings/pwm/pwm-sifive.txt create mode 100644 drivers/pwm/pwm-sifive.c -- 1.9.1
