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 Subject: [PATCH 09/10] clk: fix CLK_SET_RATE_GATE with clock rate protection Date: Thu, 18 May 2017 18:38:03 +0200 [thread overview] Message-ID: <20170518163804.14123-10-jbrunet@baylibre.com> (raw) In-Reply-To: <20170518163804.14123-1-jbrunet@baylibre.com> Using clock rate protection, we can now enforce CLK_SET_RATE_GATE along the clock tree Signed-off-by: Jerome Brunet <jbrunet@baylibre.com> --- drivers/clk/clk.c | 14 +++++++++++--- 1 file changed, 11 insertions(+), 3 deletions(-) diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c index 5980080a86c0..1db3ad28dd85 100644 --- a/drivers/clk/clk.c +++ b/drivers/clk/clk.c @@ -491,6 +491,9 @@ static void clk_core_unprepare(struct clk_core *core) if (WARN_ON(core->prepare_count == 1 && core->flags & CLK_IS_CRITICAL)) return; + if (core->flags & CLK_SET_RATE_GATE) + clk_core_rate_unprotect(core); + if (--core->prepare_count > 0) return; @@ -561,6 +564,14 @@ static int clk_core_prepare(struct clk_core *core) core->prepare_count++; + /* + * CLK_SET_RATE_GATE is a special case of clock protection + * Instead of a consumer protection, the provider is protecting + * itself when prepared + */ + if (core->flags & CLK_SET_RATE_GATE) + clk_core_rate_protect(core); + return 0; } @@ -1710,9 +1721,6 @@ static int clk_core_set_rate_nolock(struct clk_core *core, if (clk_core_rate_is_protected(core)) return -EBUSY; - if ((core->flags & CLK_SET_RATE_GATE) && core->prepare_count) - return -EBUSY; - /* calculate new rates and get the topmost changed clock */ top = clk_calc_new_rates(core, rate); if (!top) -- 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 09/10] clk: fix CLK_SET_RATE_GATE with clock rate protection Date: Thu, 18 May 2017 18:38:03 +0200 [thread overview] Message-ID: <20170518163804.14123-10-jbrunet@baylibre.com> (raw) In-Reply-To: <20170518163804.14123-1-jbrunet@baylibre.com> Using clock rate protection, we can now enforce CLK_SET_RATE_GATE along the clock tree Signed-off-by: Jerome Brunet <jbrunet@baylibre.com> --- drivers/clk/clk.c | 14 +++++++++++--- 1 file changed, 11 insertions(+), 3 deletions(-) diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c index 5980080a86c0..1db3ad28dd85 100644 --- a/drivers/clk/clk.c +++ b/drivers/clk/clk.c @@ -491,6 +491,9 @@ static void clk_core_unprepare(struct clk_core *core) if (WARN_ON(core->prepare_count == 1 && core->flags & CLK_IS_CRITICAL)) return; + if (core->flags & CLK_SET_RATE_GATE) + clk_core_rate_unprotect(core); + if (--core->prepare_count > 0) return; @@ -561,6 +564,14 @@ static int clk_core_prepare(struct clk_core *core) core->prepare_count++; + /* + * CLK_SET_RATE_GATE is a special case of clock protection + * Instead of a consumer protection, the provider is protecting + * itself when prepared + */ + if (core->flags & CLK_SET_RATE_GATE) + clk_core_rate_protect(core); + return 0; } @@ -1710,9 +1721,6 @@ static int clk_core_set_rate_nolock(struct clk_core *core, if (clk_core_rate_is_protected(core)) return -EBUSY; - if ((core->flags & CLK_SET_RATE_GATE) && core->prepare_count) - return -EBUSY; - /* calculate new rates and get the topmost changed clock */ top = clk_calc_new_rates(core, rate); if (!top) -- 2.9.4
next prev parent reply other threads:[~2017-05-18 16:38 UTC|newest] Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top 2017-05-18 16:37 [PATCH 00/10] clk: implement clock rate protection mechanism Jerome Brunet 2017-05-18 16:37 ` Jerome Brunet 2017-05-18 16:37 ` [PATCH 01/10] clk: take the prepare lock out of clk_core_set_paren Jerome Brunet 2017-05-18 16:37 ` Jerome Brunet 2017-05-18 16:37 ` [PATCH 02/10] clk: add clk_core_set_phase_nolock function Jerome Brunet 2017-05-18 16:37 ` Jerome Brunet 2017-05-18 16:37 ` [PATCH 03/10] clk: rework calls to round and determine rate callbacks Jerome Brunet 2017-05-18 16:37 ` Jerome Brunet 2017-05-18 16:37 ` [PATCH 04/10] clk: add support for clock protection Jerome Brunet 2017-05-18 16:37 ` Jerome Brunet 2017-05-18 16:37 ` [PATCH 05/10] clk: add clk_set_rate_protect Jerome Brunet 2017-05-18 16:37 ` Jerome Brunet 2017-05-18 16:38 ` [PATCH 07/10] clk: cosmetic changes to clk_summary debugfs entry Jerome Brunet 2017-05-18 16:38 ` Jerome Brunet 2017-05-18 16:38 ` [PATCH 08/10] clk: fix incorrect usage of ENOSYS Jerome Brunet 2017-05-18 16:38 ` Jerome Brunet 2017-05-18 16:38 ` Jerome Brunet [this message] 2017-05-18 16:38 ` [PATCH 09/10] clk: fix CLK_SET_RATE_GATE with clock rate protection Jerome Brunet 2017-05-18 16:38 ` [PATCH 10/10] clk: move CLK_SET_RATE_GATE protection from prepare to enable Jerome Brunet 2017-05-18 16:38 ` Jerome Brunet 2017-05-19 10:05 ` [PATCH 00/10] clk: implement clock rate protection mechanism Jerome Brunet 2017-05-19 10:05 ` Jerome Brunet
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