[PATCH 00/13] clk: imx: convert from clk round_rate() to determine_rate()

[Brian Masney <bmasney@redhat.com>]

The round_rate() clk ops is deprecated in the clk framework in favor
of the determine_rate() clk ops. The first two patches in this series
drops the round_rate() function since a determine_rate() function is
already implemented. The remaining patches convert the drivers using
the Coccinelle semantic patch posted below. I did a few minor cosmetic
cleanups of the code in a few cases.

Coccinelle semantic patch:

    virtual patch

    // Look up the current name of the round_rate function
    @ has_round_rate @
    identifier round_rate_name =~ ".*_round_rate";
    identifier hw_param, rate_param, parent_rate_param;
    @@

    long round_rate_name(struct clk_hw *hw_param, unsigned long rate_param,
                  unsigned long *parent_rate_param)
    {
    	...
    }

    // Rename the route_rate function name to determine_rate()
    @ script:python generate_name depends on has_round_rate @
    round_rate_name << has_round_rate.round_rate_name;
    new_name;
    @@

    coccinelle.new_name = round_rate_name.replace("_round_rate", "_determine_rate")

    // Change rate to req->rate; also change occurrences of 'return XXX'.
    @ chg_rate depends on generate_name @
    identifier has_round_rate.round_rate_name;
    identifier has_round_rate.hw_param;
    identifier has_round_rate.rate_param;
    identifier has_round_rate.parent_rate_param;
    identifier ERR =~ "E.*";
    expression E;
    @@

    long round_rate_name(struct clk_hw *hw_param, unsigned long rate_param,
                  unsigned long *parent_rate_param)
    {
    <...
    (
    -return -ERR;
    +return -ERR;
    |
    - return rate_param;
    + return 0;
    |
    - return E;
    + req->rate = E;
    +
    + return 0;
    |
    - rate_param
    + req->rate
    )
    ...>
    }

    // Coccinelle only transforms the first occurrence of the rate parameter
    // Run a second time. FIXME: Is there a better way to do this?
    @ chg_rate2 depends on generate_name @
    identifier has_round_rate.round_rate_name;
    identifier has_round_rate.hw_param;
    identifier has_round_rate.rate_param;
    identifier has_round_rate.parent_rate_param;
    @@

    long round_rate_name(struct clk_hw *hw_param, unsigned long rate_param,
                  unsigned long *parent_rate_param)
    {
    <...
    - rate_param
    + req->rate
    ...>
    }

    // Change parent_rate to req->best_parent_rate
    @ chg_parent_rate depends on generate_name @
    identifier has_round_rate.round_rate_name;
    identifier has_round_rate.hw_param;
    identifier has_round_rate.rate_param;
    identifier has_round_rate.parent_rate_param;
    @@

    long round_rate_name(struct clk_hw *hw_param, unsigned long rate_param,
                  unsigned long *parent_rate_param)
    {
    <...
    (
    - *parent_rate_param
    + req->best_parent_rate
    |
    - parent_rate_param
    + &req->best_parent_rate
    )
    ...>
    }

    // Convert the function definition from round_rate() to determine_rate()
    @ func_definition depends on chg_rate @
    identifier has_round_rate.round_rate_name;
    identifier has_round_rate.hw_param;
    identifier has_round_rate.rate_param;
    identifier has_round_rate.parent_rate_param;
    identifier generate_name.new_name;
    @@

    - long round_rate_name(struct clk_hw *hw_param, unsigned long rate_param,
    -               unsigned long *parent_rate_param)
    + int new_name(struct clk_hw *hw, struct clk_rate_request *req)
    {
        ...
    }

    // Update the ops from round_rate() to determine_rate()
    @ ops depends on func_definition @
    identifier has_round_rate.round_rate_name;
    identifier generate_name.new_name;
    @@

    {
        ...,
    -   .round_rate = round_rate_name,
    +   .determine_rate = new_name,
        ...,
    }

Note that I used coccinelle 1.2 instead of 1.3 since the newer version
adds unnecessary braces as described in this post.
https://lore.kernel.org/cocci/67642477-5f3e-4b2a-914d-579a54f48cbd@intel.com/

Signed-off-by: Brian Masney <bmasney@redhat.com>
---
Brian Masney (13):
      clk: imx: composite-8m: remove round_rate() in favor of determine_rate()
      clk: imx: composite-93: remove round_rate() in favor of determine_rate()
      clk: imx: busy: convert from round_rate() to determine_rate()
      clk: imx: cpu: convert from round_rate() to determine_rate()
      clk: imx: fixup-div: convert from round_rate() to determine_rate()
      clk: imx: fracn-gppll: convert from round_rate() to determine_rate()
      clk: imx: frac-pll: convert from round_rate() to determine_rate()
      clk: imx: pfd: convert from round_rate() to determine_rate()
      clk: imx: pll14xx: convert from round_rate() to determine_rate()
      clk: imx: pllv2: convert from round_rate() to determine_rate()
      clk: imx: pllv3: convert from round_rate() to determine_rate()
      clk: imx: pllv4: convert from round_rate() to determine_rate()
      clk: imx: scu: convert from round_rate() to determine_rate()

 drivers/clk/imx/clk-busy.c         |  8 ++---
 drivers/clk/imx/clk-composite-8m.c | 16 ---------
 drivers/clk/imx/clk-composite-93.c |  7 ----
 drivers/clk/imx/clk-cpu.c          | 10 +++---
 drivers/clk/imx/clk-fixup-div.c    |  8 ++---
 drivers/clk/imx/clk-frac-pll.c     | 20 ++++++-----
 drivers/clk/imx/clk-fracn-gppll.c  | 17 +++++----
 drivers/clk/imx/clk-pfd.c          | 18 +++++-----
 drivers/clk/imx/clk-pll14xx.c      | 29 +++++++++------
 drivers/clk/imx/clk-pllv2.c        | 23 +++++++-----
 drivers/clk/imx/clk-pllv3.c        | 72 +++++++++++++++++++++-----------------
 drivers/clk/imx/clk-pllv4.c        | 29 +++++++++------
 drivers/clk/imx/clk-scu.c          | 36 +++++--------------
 13 files changed, 146 insertions(+), 147 deletions(-)
---
base-commit: b551c4e2a98a177a06148cf16505643cd2108386
change-id: 20250710-clk-imx-round-rate-b9fca1f65834

Best regards,
-- 
Brian Masney <bmasney@redhat.com>