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Date: Thu, 31 Jul 2014 13:22:11 +0200
From: Humberto Silva Naves <hsnaves@...il.com>
To: linux-samsung-soc@...r.kernel.org
Cc: linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
linux-doc@...r.kernel.org, devicetree@...r.kernel.org,
Kukjin Kim <kgene.kim@...sung.com>,
Tomasz Figa <t.figa@...sung.com>,
Thomas Abraham <ta.omasab@...il.com>,
Andreas Farber <afaerber@...e.de>,
Randy Dunlap <rdunlap@...radead.org>,
Ian Campbell <ijc+devicetree@...lion.org.uk>,
Humberto Silva Naves <hsnaves@...il.com>
Subject: [PATCHv2 4/5] clk: samsung: exynos5410: Add fixed rate clocks
This implements the fixed rate clocks generated either inside or
outside the SoC. It also adds a dt-binding constant for the
sclk_hdmiphy clock, which shall be later used by other drivers,
such as the DRM.
Since the external fixed rate clock fin_pll is now registered by
the clk-exynos5410 file, the bindings with the device tree file have
changed. It is no longer needed to define fin_pll as a fixed clock,
such as in:
fin_pll: xxti {
compatible = "fixed-clock";
clock-frequency = <24000000>;
clock-output-names = "fin_pll";
#clock-cells = <0>;
};
The above lines should be replaced by the following lines:
fixed-rate-clocks {
oscclk {
compatible = "samsung,exynos5410-oscclk";
clock-frequency = <24000000>;
};
};
This new form of binding was properly documented in the relevant
documentation file.
Signed-off-by: Humberto Silva Naves <hsnaves@...il.com>
---
.../devicetree/bindings/clock/exynos5410-clock.txt | 17 ++++++++++---
drivers/clk/samsung/clk-exynos5410.c | 26 +++++++++++++++++++-
include/dt-bindings/clock/exynos5410.h | 1 +
3 files changed, 39 insertions(+), 5 deletions(-)
diff --git a/Documentation/devicetree/bindings/clock/exynos5410-clock.txt b/Documentation/devicetree/bindings/clock/exynos5410-clock.txt
index aeab635..9f4a286 100644
--- a/Documentation/devicetree/bindings/clock/exynos5410-clock.txt
+++ b/Documentation/devicetree/bindings/clock/exynos5410-clock.txt
@@ -18,12 +18,21 @@ tree sources.
External clock:
-There is clock that is generated outside the SoC. It
-is expected that it is defined using standard clock bindings
-with following clock-output-name:
-
+There is a clock that is generated outside the SoC, namely
- "fin_pll" - PLL input clock from XXTI
+It is expected that a binding compatible with "samsung,exynos5410-oscclk"
+having a populated clock-frequency field such as follows to be used in
+order to define this external clock:
+
+ fixed-rate-clocks {
+ oscclk {
+ compatible = "samsung,exynos5410-oscclk";
+ clock-frequency = <24000000>;
+ };
+ };
+
+
Example 1: An example of a clock controller node is listed below.
clock: clock-controller@...0010000 {
diff --git a/drivers/clk/samsung/clk-exynos5410.c b/drivers/clk/samsung/clk-exynos5410.c
index a9c261c..efbe734 100644
--- a/drivers/clk/samsung/clk-exynos5410.c
+++ b/drivers/clk/samsung/clk-exynos5410.c
@@ -307,6 +307,20 @@ PNAME(group2_p) = { "fin_pll", "fin_pll", "none", "none",
"none", "none", "sclk_mpll_bpll",
"none", "none", "sclk_cpll" };
+/* fixed rate clocks generated outside the soc */
+static struct samsung_fixed_rate_clock exynos5410_fixed_rate_ext_clks[] __initdata = {
+ FRATE(CLK_FIN_PLL, "fin_pll", NULL, CLK_IS_ROOT, 0),
+};
+
+/* fixed rate clocks generated inside the soc */
+static struct samsung_fixed_rate_clock exynos5410_fixed_rate_clks[] __initdata = {
+ FRATE(CLK_SCLK_HDMIPHY, "sclk_hdmiphy", NULL, CLK_IS_ROOT, 24000000),
+ FRATE(0, "sclk_hdmi24m", NULL, CLK_IS_ROOT, 24000000),
+ FRATE(0, "sclk_hdmi27m", NULL, CLK_IS_ROOT, 27000000),
+ FRATE(0, "sclk_dptxphy", NULL, CLK_IS_ROOT, 24000000),
+ FRATE(0, "sclk_uhostphy", NULL, CLK_IS_ROOT, 48000000),
+};
+
static struct samsung_mux_clock exynos5410_mux_clks[] __initdata = {
MUX(0, "mout_apll", apll_p, SRC_CPU, 0, 1),
MUX(0, "mout_cpu", mout_cpu_p, SRC_CPU, 16, 1),
@@ -411,6 +425,11 @@ static struct samsung_pll_clock exynos5410_plls[nr_plls] __initdata = {
KPLL_CON0, NULL),
};
+static const struct of_device_id ext_clk_match[] __initconst = {
+ { .compatible = "samsung,exynos5410-oscclk", .data = (void *)0, },
+ { },
+};
+
/* register exynos5410 clocks */
static void __init exynos5410_clk_init(struct device_node *np)
{
@@ -428,9 +447,14 @@ static void __init exynos5410_clk_init(struct device_node *np)
if (!ctx)
panic("%s: unable to allocate context.\n", __func__);
+ samsung_clk_of_register_fixed_ext(ctx, exynos5410_fixed_rate_ext_clks,
+ ARRAY_SIZE(exynos5410_fixed_rate_ext_clks),
+ ext_clk_match);
+
samsung_clk_register_pll(ctx, exynos5410_plls,
ARRAY_SIZE(exynos5410_plls), reg_base);
-
+ samsung_clk_register_fixed_rate(ctx, exynos5410_fixed_rate_clks,
+ ARRAY_SIZE(exynos5410_fixed_rate_clks));
samsung_clk_register_mux(ctx, exynos5410_mux_clks,
ARRAY_SIZE(exynos5410_mux_clks));
samsung_clk_register_div(ctx, exynos5410_div_clks,
diff --git a/include/dt-bindings/clock/exynos5410.h b/include/dt-bindings/clock/exynos5410.h
index 9b180f0..3a8da3c 100644
--- a/include/dt-bindings/clock/exynos5410.h
+++ b/include/dt-bindings/clock/exynos5410.h
@@ -17,6 +17,7 @@
#define CLK_SCLK_MMC0 132
#define CLK_SCLK_MMC1 133
#define CLK_SCLK_MMC2 134
+#define CLK_SCLK_HDMIPHY 135
/* gate clocks */
#define CLK_UART0 257
--
1.7.10.4
--
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