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Message-Id: <1466068833-5055-5-git-send-email-gabriel.fernandez@linaro.org>
Date: Thu, 16 Jun 2016 11:20:24 +0200
From: Gabriel Fernandez <gabriel.fernandez@...aro.org>
To: Rob Herring <robh+dt@...nel.org>,
Mark Rutland <mark.rutland@....com>,
Ian Campbell <ijc+devicetree@...lion.org.uk>,
Kumar Gala <galak@...eaurora.org>,
Srinivas Kandagatla <srinivas.kandagatla@...il.com>,
Maxime Coquelin <maxime.coquelin@...com>,
Patrice Chotard <patrice.chotard@...com>,
Russell King <linux@...linux.org.uk>,
Michael Turquette <mturquette@...libre.com>,
Stephen Boyd <sboyd@...eaurora.org>,
Olivier Bideau <olivier.bideau@...com>,
Gabriel Fernandez <gabriel.fernandez@...aro.org>,
Geert Uytterhoeven <geert+renesas@...der.be>,
Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
Andrzej Hajda <a.hajda@...sung.com>,
Pankaj Dev <pankaj.dev@...com>,
Dinh Nguyen <dinguyen@...nsource.altera.com>,
Arnd Bergmann <arnd@...db.de>,
Thierry Reding <treding@...dia.com>
Cc: devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org, kernel@...inux.com,
linux-clk@...r.kernel.org, Lee Jones <lee.jones@...aro.org>,
Peter Griffin <peter.griffin@...aro.org>,
<arnaud.pouliquen@...com>, <benjamin.gaignard@...com>,
<vincent.abriou@...com>, <gabriel.fernandez@...com>
Subject: [RESEND PATCH v2 04/13] drivers: clk: st: Add clock propagation for audio clocks
This patch allows fine tuning of the quads FS for audio clocks
accuracy.
Signed-off-by: Olivier Bideau <olivier.bideau@...com>
Signed-off-by: Gabriel Fernandez <gabriel.fernandez@...aro.org>
---
.../devicetree/bindings/clock/st/st,flexgen.txt | 2 ++
drivers/clk/st/clk-flexgen.c | 24 ++++++++++++++++++++++
2 files changed, 26 insertions(+)
diff --git a/Documentation/devicetree/bindings/clock/st/st,flexgen.txt b/Documentation/devicetree/bindings/clock/st/st,flexgen.txt
index b7ee5c7..d68f6a5f 100644
--- a/Documentation/devicetree/bindings/clock/st/st,flexgen.txt
+++ b/Documentation/devicetree/bindings/clock/st/st,flexgen.txt
@@ -60,6 +60,8 @@ This binding uses the common clock binding[2].
Required properties:
- compatible : shall be:
"st,flexgen"
+ "st,flexgen-audio", "st,flexgen" (enable clock propagation on parent for
+ audio use case)
- #clock-cells : from common clock binding; shall be set to 1 (multiple clock
outputs).
diff --git a/drivers/clk/st/clk-flexgen.c b/drivers/clk/st/clk-flexgen.c
index 627267c..33d6ced 100644
--- a/drivers/clk/st/clk-flexgen.c
+++ b/drivers/clk/st/clk-flexgen.c
@@ -15,6 +15,10 @@
#include <linux/of.h>
#include <linux/of_address.h>
+struct clkgen_data {
+ unsigned long flags;
+};
+
struct flexgen {
struct clk_hw hw;
@@ -259,6 +263,18 @@ static const char ** __init flexgen_get_parents(struct device_node *np,
return parents;
}
+static const struct clkgen_data clkgen_audio = {
+ .flags = CLK_SET_RATE_PARENT,
+};
+
+static const struct of_device_id flexgen_of_match[] = {
+ {
+ .compatible = "st,flexgen-audio",
+ .data = &clkgen_audio,
+ },
+ {}
+};
+
static void __init st_of_flexgen_setup(struct device_node *np)
{
struct device_node *pnode;
@@ -267,6 +283,8 @@ static void __init st_of_flexgen_setup(struct device_node *np)
const char **parents;
int num_parents, i;
spinlock_t *rlock = NULL;
+ const struct of_device_id *match;
+ struct clkgen_data *data = NULL;
unsigned long flex_flags = 0;
int ret;
@@ -282,6 +300,12 @@ static void __init st_of_flexgen_setup(struct device_node *np)
if (!parents)
return;
+ match = of_match_node(flexgen_of_match, np);
+ if (match) {
+ data = (struct clkgen_data *)match->data;
+ flex_flags = data->flags;
+ }
+
clk_data = kzalloc(sizeof(*clk_data), GFP_KERNEL);
if (!clk_data)
goto err;
--
1.9.1
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