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Message-ID: <1363703220-4777-2-git-send-email-rogerq@ti.com>
Date: Tue, 19 Mar 2013 16:26:59 +0200
From: Roger Quadros <rogerq@...com>
To: <tony@...mide.com>, <b-cousson@...com>
CC: <linux@....linux.org.uk>, <rnayak@...com>, <balbi@...com>,
<rogerq@...com>, <linux-omap@...r.kernel.org>,
<linux-arm-kernel@...ts.infradead.org>,
<linux-usb@...r.kernel.org>, <devicetree-discuss@...ts.ozlabs.org>,
<linux-kernel@...r.kernel.org>
Subject: [RFC][PATCH 1/2] ARM: OMAP4: clock: Add device tree support for AUXCLKs
Register a device tree clock provider for AUX clocks
on the OMAP4 SoC. Also provide the binding information.
Signed-off-by: Roger Quadros <rogerq@...com>
---
.../devicetree/bindings/clock/omap4-clock.txt | 32 ++++++++++++++++++
arch/arm/boot/dts/omap4.dtsi | 5 +++
arch/arm/mach-omap2/board-generic.c | 2 +-
arch/arm/mach-omap2/cclock44xx_data.c | 35 ++++++++++++++++++++
arch/arm/mach-omap2/clock44xx.h | 1 +
arch/arm/mach-omap2/common.h | 9 +++++
arch/arm/mach-omap2/io.c | 6 +++
7 files changed, 89 insertions(+), 1 deletions(-)
create mode 100644 Documentation/devicetree/bindings/clock/omap4-clock.txt
diff --git a/Documentation/devicetree/bindings/clock/omap4-clock.txt b/Documentation/devicetree/bindings/clock/omap4-clock.txt
new file mode 100644
index 0000000..9d5448b
--- /dev/null
+++ b/Documentation/devicetree/bindings/clock/omap4-clock.txt
@@ -0,0 +1,32 @@
+* Clock bindings for Texas Instruments OMAP4 SCRM clocks
+
+Required properties:
+- compatible: Should be "ti,omap4-scrm"
+- #clock-cells: Should be <1>
+
+The clock consumer should specify the desired clock by having the clock
+ID in its "clocks" phandle cell. The following is a full list of SCRM
+clocks and IDs.
+
+ Clock ID
+ ------------------
+ auxclk0_ck 0
+ auxclk1_ck 1
+ auxclk1_ck 1
+ auxclk1_ck 1
+ auxclk1_ck 1
+
+Example:
+
+aux_clks: scrmclks {
+ compatible = "ti,omap4-scrm";
+ #clock-cells = <1>;
+};
+
+hsusb1_phy: hsusb1_phy {
+ compatible = "usb-nop-xceiv";
+ reset-supply = <&hsusb1_reset>;
+ clocks = <&aux_clks 3>;
+ clock-names = "main_clk";
+ clock-frequency = <19200000>;
+};
diff --git a/arch/arm/boot/dts/omap4.dtsi b/arch/arm/boot/dts/omap4.dtsi
index b7db1a2..97de56c 100644
--- a/arch/arm/boot/dts/omap4.dtsi
+++ b/arch/arm/boot/dts/omap4.dtsi
@@ -101,6 +101,11 @@
ti,hwmods = "counter_32k";
};
+ aux_clks: scrmclks {
+ compatible = "ti,omap4-scrm";
+ #clock-cells = <1>;
+ };
+
omap4_pmx_core: pinmux@...00040 {
compatible = "ti,omap4-padconf", "pinctrl-single";
reg = <0x4a100040 0x0196>;
diff --git a/arch/arm/mach-omap2/board-generic.c b/arch/arm/mach-omap2/board-generic.c
index 0274ff7..23f2064 100644
--- a/arch/arm/mach-omap2/board-generic.c
+++ b/arch/arm/mach-omap2/board-generic.c
@@ -158,7 +158,7 @@ DT_MACHINE_START(OMAP4_DT, "Generic OMAP4 (Flattened Device Tree)")
.init_irq = omap_gic_of_init,
.init_machine = omap_generic_init,
.init_late = omap4430_init_late,
- .init_time = omap4_local_timer_init,
+ .init_time = omap4_init_time,
.dt_compat = omap4_boards_compat,
.restart = omap44xx_restart,
MACHINE_END
diff --git a/arch/arm/mach-omap2/cclock44xx_data.c b/arch/arm/mach-omap2/cclock44xx_data.c
index 3d58f33..bfc46c1 100644
--- a/arch/arm/mach-omap2/cclock44xx_data.c
+++ b/arch/arm/mach-omap2/cclock44xx_data.c
@@ -27,6 +27,7 @@
#include <linux/clk-private.h>
#include <linux/clkdev.h>
#include <linux/io.h>
+#include <linux/of.h>
#include "soc.h"
#include "iomap.h"
@@ -1663,6 +1664,40 @@ static struct omap_clk omap44xx_clks[] = {
CLK(NULL, "cpufreq_ck", &dpll_mpu_ck, CK_443X),
};
+static struct clk *scrm_clks[] = {
+ &auxclk0_ck,
+ &auxclk1_ck,
+ &auxclk2_ck,
+ &auxclk3_ck,
+ &auxclk4_ck,
+ &auxclk5_ck,
+};
+
+static struct clk_onecell_data scrm_data;
+
+#ifdef CONFIG_OF
+int __init omap4_clk_init_dt(void)
+{
+ struct device_node *np;
+
+ np = of_find_compatible_node(NULL, NULL, "ti,omap4-scrm");
+ if (np) {
+ scrm_data.clks = scrm_clks;
+ scrm_data.clk_num = ARRAY_SIZE(scrm_clks);
+ of_clk_add_provider(np, of_clk_src_onecell_get, &scrm_data);
+ }
+
+ return 0;
+}
+
+#else
+
+int __init omap4_clk_init_dt(void)
+{
+ return 0;
+}
+#endif /* CONFIG_OF */
+
int __init omap4xxx_clk_init(void)
{
u32 cpu_clkflg;
diff --git a/arch/arm/mach-omap2/clock44xx.h b/arch/arm/mach-omap2/clock44xx.h
index 287a46f..6395f63 100644
--- a/arch/arm/mach-omap2/clock44xx.h
+++ b/arch/arm/mach-omap2/clock44xx.h
@@ -16,5 +16,6 @@
#define OMAP4430_REGM4XEN_MULT 4
int omap4xxx_clk_init(void);
+int omap4_clk_init_dt(void);
#endif
diff --git a/arch/arm/mach-omap2/common.h b/arch/arm/mach-omap2/common.h
index 0a6b9c7..1941d1c 100644
--- a/arch/arm/mach-omap2/common.h
+++ b/arch/arm/mach-omap2/common.h
@@ -98,6 +98,7 @@ void am35xx_init_early(void);
void ti81xx_init_early(void);
void am33xx_init_early(void);
void omap4430_init_early(void);
+void omap4_init_time(void);
void omap5_init_early(void);
void omap3_init_late(void); /* Do not use this one */
void omap4430_init_late(void);
@@ -143,6 +144,14 @@ static inline void omap44xx_restart(char mode, const char *cmd)
}
#endif
+#ifdef CONFIG_ARCH_OMAP4
+void omap4_init_time(void);
+#else
+static inline void omap4_init_time(void)
+{
+}
+#endif
+
/* This gets called from mach-omap2/io.c, do not call this */
void __init omap2_set_globals_tap(u32 class, void __iomem *tap);
diff --git a/arch/arm/mach-omap2/io.c b/arch/arm/mach-omap2/io.c
index 2c3fdd6..c504363 100644
--- a/arch/arm/mach-omap2/io.c
+++ b/arch/arm/mach-omap2/io.c
@@ -603,6 +603,12 @@ void __init omap4430_init_late(void)
omap4_pm_init();
omap2_clk_enable_autoidle_all();
}
+
+void __init omap4_init_time(void)
+{
+ omap4_clk_init_dt();
+ omap4_local_timer_init();
+}
#endif
#ifdef CONFIG_SOC_OMAP5
--
1.7.4.1
--
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