[PATCH v2 02/11] ARM: davinci: add set_parent callback for mux clocks
From: david@lechnology.com (David Lechner)
Date: 2016-03-17 03:40:13
Also in:
linux-devicetree, lkml
Subsystem:
arm port, the rest, ti davinci machine support · Maintainers:
Russell King, Linus Torvalds, Bartosz Golaszewski
Introduce a set_parent callback that will be used for mux clocks, such as the USB PHY muxes and the async3 clock domain mux. Signed-off-by: David Lechner <david@lechnology.com> --- v2 changes: This is a new patch in v2. arch/arm/mach-davinci/clock.c | 17 ++++++++++++++++- arch/arm/mach-davinci/clock.h | 1 + 2 files changed, 17 insertions(+), 1 deletion(-)
diff --git a/arch/arm/mach-davinci/clock.c b/arch/arm/mach-davinci/clock.c
index 3424eac6..3143e8b 100644
--- a/arch/arm/mach-davinci/clock.c
+++ b/arch/arm/mach-davinci/clock.c@@ -195,6 +195,13 @@ int clk_set_parent(struct clk *clk, struct clk *parent) return -EINVAL; mutex_lock(&clocks_mutex); + if (clk->set_parent) { + int ret = clk->set_parent(clk, parent); + if (ret) { + mutex_unlock(&clocks_mutex); + return ret; + } + } clk->parent = parent; list_del_init(&clk->childnode); list_add(&clk->childnode, &clk->parent->children);
@@ -224,8 +231,16 @@ int clk_register(struct clk *clk) mutex_lock(&clocks_mutex); list_add_tail(&clk->node, &clocks); - if (clk->parent) + if (clk->parent) { + if (clk->set_parent) { + int ret = clk->set_parent(clk, clk->parent); + if (ret) { + mutex_unlock(&clocks_mutex); + return ret; + } + } list_add_tail(&clk->childnode, &clk->parent->children); + } mutex_unlock(&clocks_mutex); /* If rate is already set, use it */
diff --git a/arch/arm/mach-davinci/clock.h b/arch/arm/mach-davinci/clock.h
index 1e4e836..e2a5437 100644
--- a/arch/arm/mach-davinci/clock.h
+++ b/arch/arm/mach-davinci/clock.h@@ -106,6 +106,7 @@ struct clk { int (*reset) (struct clk *clk, bool reset); void (*clk_enable) (struct clk *clk); void (*clk_disable) (struct clk *clk); + int (*set_parent) (struct clk *clk, struct clk *parent); }; /* Clock flags: SoC-specific flags start at BIT(16) */
--
1.9.1