From: Jerome Brunet <jbrunet@baylibre.com> To: Michael Turquette <mturquette@baylibre.com>, Stephen Boyd <sboyd@codeaurora.org>, Kevin Hilman <khilman@baylibre.com> Cc: Jerome Brunet <jbrunet@baylibre.com>, linux-clk@vger.kernel.org, linux-amlogic@lists.infradead.org, Linus Walleij <linus.walleij@linaro.org>, Boris Brezillon <boris.brezillon@free-electrons.com> Subject: [PATCH v2 03/11] clk: rework calls to round and determine rate callbacks Date: Sun, 21 May 2017 23:59:50 +0200 [thread overview] Message-ID: <20170521215958.19743-4-jbrunet@baylibre.com> (raw) In-Reply-To: <20170521215958.19743-1-jbrunet@baylibre.com> Rework the way the callbacks round_rate and determine_rate are called. The goal is to do this at a single point and make it easier to add conditions before calling them. This rework is done to ease the integration of "protected" clock functionality. Signed-off-by: Jerome Brunet <jbrunet@baylibre.com> --- drivers/clk/clk.c | 78 +++++++++++++++++++++++++++++++------------------------ 1 file changed, 44 insertions(+), 34 deletions(-) diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c index 6031fada37f9..100f72472e10 100644 --- a/drivers/clk/clk.c +++ b/drivers/clk/clk.c @@ -833,16 +833,34 @@ static int clk_disable_unused(void) } late_initcall_sync(clk_disable_unused); -static int clk_core_round_rate_nolock(struct clk_core *core, - struct clk_rate_request *req) +static int clk_core_determine_round(struct clk_core *core, + struct clk_rate_request *req) { - struct clk_core *parent; long rate; - lockdep_assert_held(&prepare_lock); + if (core->ops->determine_rate) { + return core->ops->determine_rate(core->hw, req); + } else if (core->ops->round_rate) { + rate = core->ops->round_rate(core->hw, req->rate, + &req->best_parent_rate); + if (rate < 0) + return rate; - if (!core) - return 0; + req->rate = rate; + } else { + return -EINVAL; + } + + return 0; +} + +static void clk_core_init_rate_req(struct clk_core *core, + struct clk_rate_request *req) +{ + struct clk_core *parent; + + if (WARN_ON(!core || !req)) + return; parent = core->parent; if (parent) { @@ -852,22 +870,24 @@ static int clk_core_round_rate_nolock(struct clk_core *core, req->best_parent_hw = NULL; req->best_parent_rate = 0; } +} - if (core->ops->determine_rate) { - return core->ops->determine_rate(core->hw, req); - } else if (core->ops->round_rate) { - rate = core->ops->round_rate(core->hw, req->rate, - &req->best_parent_rate); - if (rate < 0) - return rate; +static int clk_core_round_rate_nolock(struct clk_core *core, + struct clk_rate_request *req) +{ + lockdep_assert_held(&prepare_lock); - req->rate = rate; - } else if (core->flags & CLK_SET_RATE_PARENT) { - return clk_core_round_rate_nolock(parent, req); - } else { - req->rate = core->rate; - } + if (!core) + return 0; + + clk_core_init_rate_req(core, req); + + if (core->ops->determine_rate || core->ops->round_rate) + return clk_core_determine_round(core, req); + else if (core->flags & CLK_SET_RATE_PARENT) + return clk_core_round_rate_nolock(core->parent, req); + req->rate = core->rate; return 0; } @@ -1356,36 +1376,26 @@ static struct clk_core *clk_calc_new_rates(struct clk_core *core, clk_core_get_boundaries(core, &min_rate, &max_rate); /* find the closest rate and parent clk/rate */ - if (core->ops->determine_rate) { + if (core->ops->determine_rate || core->ops->round_rate) { struct clk_rate_request req; req.rate = rate; req.min_rate = min_rate; req.max_rate = max_rate; - if (parent) { - req.best_parent_hw = parent->hw; - req.best_parent_rate = parent->rate; - } else { - req.best_parent_hw = NULL; - req.best_parent_rate = 0; - } - ret = core->ops->determine_rate(core->hw, &req); + clk_core_init_rate_req(core, &req); + + ret = clk_core_determine_round(core, &req); if (ret < 0) return NULL; best_parent_rate = req.best_parent_rate; new_rate = req.rate; parent = req.best_parent_hw ? req.best_parent_hw->core : NULL; - } else if (core->ops->round_rate) { - ret = core->ops->round_rate(core->hw, rate, - &best_parent_rate); - if (ret < 0) - return NULL; - new_rate = ret; if (new_rate < min_rate || new_rate > max_rate) return NULL; + } else if (!parent || !(core->flags & CLK_SET_RATE_PARENT)) { /* pass-through clock without adjustable parent */ core->new_rate = core->rate; -- 2.9.4
WARNING: multiple messages have this Message-ID (diff)
From: jbrunet@baylibre.com (Jerome Brunet) To: linus-amlogic@lists.infradead.org Subject: [PATCH v2 03/11] clk: rework calls to round and determine rate callbacks Date: Sun, 21 May 2017 23:59:50 +0200 [thread overview] Message-ID: <20170521215958.19743-4-jbrunet@baylibre.com> (raw) In-Reply-To: <20170521215958.19743-1-jbrunet@baylibre.com> Rework the way the callbacks round_rate and determine_rate are called. The goal is to do this at a single point and make it easier to add conditions before calling them. This rework is done to ease the integration of "protected" clock functionality. Signed-off-by: Jerome Brunet <jbrunet@baylibre.com> --- drivers/clk/clk.c | 78 +++++++++++++++++++++++++++++++------------------------ 1 file changed, 44 insertions(+), 34 deletions(-) diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c index 6031fada37f9..100f72472e10 100644 --- a/drivers/clk/clk.c +++ b/drivers/clk/clk.c @@ -833,16 +833,34 @@ static int clk_disable_unused(void) } late_initcall_sync(clk_disable_unused); -static int clk_core_round_rate_nolock(struct clk_core *core, - struct clk_rate_request *req) +static int clk_core_determine_round(struct clk_core *core, + struct clk_rate_request *req) { - struct clk_core *parent; long rate; - lockdep_assert_held(&prepare_lock); + if (core->ops->determine_rate) { + return core->ops->determine_rate(core->hw, req); + } else if (core->ops->round_rate) { + rate = core->ops->round_rate(core->hw, req->rate, + &req->best_parent_rate); + if (rate < 0) + return rate; - if (!core) - return 0; + req->rate = rate; + } else { + return -EINVAL; + } + + return 0; +} + +static void clk_core_init_rate_req(struct clk_core *core, + struct clk_rate_request *req) +{ + struct clk_core *parent; + + if (WARN_ON(!core || !req)) + return; parent = core->parent; if (parent) { @@ -852,22 +870,24 @@ static int clk_core_round_rate_nolock(struct clk_core *core, req->best_parent_hw = NULL; req->best_parent_rate = 0; } +} - if (core->ops->determine_rate) { - return core->ops->determine_rate(core->hw, req); - } else if (core->ops->round_rate) { - rate = core->ops->round_rate(core->hw, req->rate, - &req->best_parent_rate); - if (rate < 0) - return rate; +static int clk_core_round_rate_nolock(struct clk_core *core, + struct clk_rate_request *req) +{ + lockdep_assert_held(&prepare_lock); - req->rate = rate; - } else if (core->flags & CLK_SET_RATE_PARENT) { - return clk_core_round_rate_nolock(parent, req); - } else { - req->rate = core->rate; - } + if (!core) + return 0; + + clk_core_init_rate_req(core, req); + + if (core->ops->determine_rate || core->ops->round_rate) + return clk_core_determine_round(core, req); + else if (core->flags & CLK_SET_RATE_PARENT) + return clk_core_round_rate_nolock(core->parent, req); + req->rate = core->rate; return 0; } @@ -1356,36 +1376,26 @@ static struct clk_core *clk_calc_new_rates(struct clk_core *core, clk_core_get_boundaries(core, &min_rate, &max_rate); /* find the closest rate and parent clk/rate */ - if (core->ops->determine_rate) { + if (core->ops->determine_rate || core->ops->round_rate) { struct clk_rate_request req; req.rate = rate; req.min_rate = min_rate; req.max_rate = max_rate; - if (parent) { - req.best_parent_hw = parent->hw; - req.best_parent_rate = parent->rate; - } else { - req.best_parent_hw = NULL; - req.best_parent_rate = 0; - } - ret = core->ops->determine_rate(core->hw, &req); + clk_core_init_rate_req(core, &req); + + ret = clk_core_determine_round(core, &req); if (ret < 0) return NULL; best_parent_rate = req.best_parent_rate; new_rate = req.rate; parent = req.best_parent_hw ? req.best_parent_hw->core : NULL; - } else if (core->ops->round_rate) { - ret = core->ops->round_rate(core->hw, rate, - &best_parent_rate); - if (ret < 0) - return NULL; - new_rate = ret; if (new_rate < min_rate || new_rate > max_rate) return NULL; + } else if (!parent || !(core->flags & CLK_SET_RATE_PARENT)) { /* pass-through clock without adjustable parent */ core->new_rate = core->rate; -- 2.9.4
next prev parent reply other threads:[~2017-05-21 21:59 UTC|newest] Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top 2017-05-21 21:59 [PATCH v2 00/11] clk: implement clock rate protection mechanism Jerome Brunet 2017-05-21 21:59 ` Jerome Brunet 2017-05-21 21:59 ` [PATCH v2 01/11] clk: take the prepare lock out of clk_core_set_parent Jerome Brunet 2017-05-21 21:59 ` Jerome Brunet 2017-05-25 18:54 ` Michael Turquette 2017-05-25 18:54 ` Michael Turquette 2017-05-29 9:35 ` Jerome Brunet 2017-05-29 9:35 ` Jerome Brunet 2017-05-21 21:59 ` [PATCH v2 02/11] clk: add clk_core_set_phase_nolock function Jerome Brunet 2017-05-21 21:59 ` Jerome Brunet 2017-05-23 9:35 ` Adriana Reus 2017-05-23 9:35 ` Adriana Reus 2017-05-23 9:48 ` Jerome Brunet 2017-05-23 9:48 ` Jerome Brunet 2017-05-25 18:58 ` Michael Turquette 2017-05-25 18:58 ` Michael Turquette 2017-05-21 21:59 ` Jerome Brunet [this message] 2017-05-21 21:59 ` [PATCH v2 03/11] clk: rework calls to round and determine rate callbacks Jerome Brunet 2017-05-25 20:13 ` Michael Turquette 2017-05-25 20:13 ` Michael Turquette 2017-05-21 21:59 ` [PATCH v2 04/11] clk: use round rate to bail out early in set_rate Jerome Brunet 2017-05-21 21:59 ` Jerome Brunet 2017-05-25 20:20 ` Michael Turquette 2017-05-25 20:20 ` Michael Turquette 2017-05-29 9:12 ` Jerome Brunet 2017-05-29 9:12 ` Jerome Brunet 2017-05-21 21:59 ` [PATCH v2 05/11] clk: add support for clock protection Jerome Brunet 2017-05-21 21:59 ` Jerome Brunet 2017-05-25 20:58 ` Michael Turquette 2017-05-25 20:58 ` Michael Turquette 2017-05-29 9:15 ` Jerome Brunet 2017-05-29 9:15 ` Jerome Brunet 2017-05-21 21:59 ` [PATCH v2 06/11] clk: add clk_set_rate_protect Jerome Brunet 2017-05-21 21:59 ` Jerome Brunet 2017-05-21 21:59 ` [PATCH v2 07/11] clk: rollback set_rate_range changes on failure Jerome Brunet 2017-05-21 21:59 ` Jerome Brunet 2017-05-21 21:59 ` [PATCH v2 08/11] clk: cosmetic changes to clk_summary debugfs entry Jerome Brunet 2017-05-21 21:59 ` Jerome Brunet 2017-05-21 21:59 ` [PATCH v2 09/11] clk: fix incorrect usage of ENOSYS Jerome Brunet 2017-05-21 21:59 ` Jerome Brunet 2017-05-21 21:59 ` [PATCH v2 10/11] clk: fix CLK_SET_RATE_GATE with clock rate protection Jerome Brunet 2017-05-21 21:59 ` Jerome Brunet 2017-05-23 13:42 ` Adriana Reus 2017-05-23 13:42 ` Adriana Reus 2017-05-23 15:09 ` Jerome Brunet 2017-05-23 15:09 ` Jerome Brunet 2017-05-21 21:59 ` [PATCH v2 11/11] clk: move CLK_SET_RATE_GATE protection from prepare to enable Jerome Brunet 2017-05-21 21:59 ` Jerome Brunet 2017-05-29 9:17 ` Jerome Brunet 2017-05-29 9:17 ` Jerome Brunet
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