From: Neil Armstrong <narmstrong@baylibre.com>
To: sboyd@kernel.org, jbrunet@baylibre.com
Cc: Neil Armstrong <narmstrong@baylibre.com>,
Martin Blumenstingl <martin.blumenstingl@googlemail.com>,
linux-kernel@vger.kernel.org, linux-amlogic@lists.infradead.org,
linux-clk@vger.kernel.org, linux-arm-kernel@lists.infradead.org
Subject: [PATCH v2 1/4] clk: core: introduce clk_hw_set_parent()
Date: Wed, 31 Jul 2019 10:40:16 +0200 [thread overview]
Message-ID: <20190731084019.8451-2-narmstrong@baylibre.com> (raw)
In-Reply-To: <20190731084019.8451-1-narmstrong@baylibre.com>
Introduce the clk_hw_set_parent() provider call to change parent of
a clock by using the clk_hw pointers.
This eases the clock reparenting from clock rate notifiers and
implementing DVFS with simpler code avoiding the boilerplates
functions as __clk_lookup(clk_hw_get_name()) then clk_set_parent().
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Acked-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
---
drivers/clk/clk.c | 6 ++++++
include/linux/clk-provider.h | 1 +
2 files changed, 7 insertions(+)
diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index c0990703ce54..c11b1781d24a 100644
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c
@@ -2487,6 +2487,12 @@ static int clk_core_set_parent_nolock(struct clk_core *core,
return ret;
}
+int clk_hw_set_parent(struct clk_hw *hw, struct clk_hw *parent)
+{
+ return clk_core_set_parent_nolock(hw->core, parent->core);
+}
+EXPORT_SYMBOL_GPL(clk_hw_set_parent);
+
/**
* clk_set_parent - switch the parent of a mux clk
* @clk: the mux clk whose input we are switching
diff --git a/include/linux/clk-provider.h b/include/linux/clk-provider.h
index 2ae7604783dd..dce5521a9bf6 100644
--- a/include/linux/clk-provider.h
+++ b/include/linux/clk-provider.h
@@ -817,6 +817,7 @@ unsigned int clk_hw_get_num_parents(const struct clk_hw *hw);
struct clk_hw *clk_hw_get_parent(const struct clk_hw *hw);
struct clk_hw *clk_hw_get_parent_by_index(const struct clk_hw *hw,
unsigned int index);
+int clk_hw_set_parent(struct clk_hw *hw, struct clk_hw *new_parent);
unsigned int __clk_get_enable_count(struct clk *clk);
unsigned long clk_hw_get_rate(const struct clk_hw *hw);
unsigned long __clk_get_flags(struct clk *clk);
--
2.22.0
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next prev parent reply other threads:[~2019-07-31 8:41 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-31 8:40 [PATCH v2 0/4] clk: meson: g12a: add support for DVFS Neil Armstrong
2019-07-31 8:40 ` Neil Armstrong [this message]
2019-08-06 8:28 ` [PATCH v2 1/4] clk: core: introduce clk_hw_set_parent() Jerome Brunet
2019-08-08 4:47 ` Stephen Boyd
2019-07-31 8:40 ` [PATCH v2 2/4] clk: meson: add g12a cpu dynamic divider driver Neil Armstrong
2019-08-03 18:34 ` Martin Blumenstingl
2019-07-31 8:40 ` [PATCH v2 3/4] clk: meson: g12a: add notifiers to handle cpu clock change Neil Armstrong
2019-07-31 8:40 ` [PATCH v2 4/4] clk: meson: g12a: expose CPUB clock ID for G12B Neil Armstrong
2019-08-06 8:38 ` [PATCH v2 0/4] clk: meson: g12a: add support for DVFS Jerome Brunet
2019-08-08 21:18 ` Kevin Hilman
2019-08-09 13:02 ` Jerome Brunet
2019-08-09 17:55 ` Kevin Hilman
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