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Date: Tue, 8 Nov 2011 18:19:43 -0700
From: Grant Likely <grant.likely@...retlab.ca>
To: devicetree-discuss@...ts.ozlabs.org,
linux-arm-kernel@...ts.infradead.org,
Sascha Hauer <kernel@...gutronix.de>,
Rob Herring <rob.herring@...xeda.com>
Cc: linux-kernel@...r.kernel.org,
Grant Likely <grant.likely@...retlab.ca>
Subject: [RFC 8/8] dt/arm: versatile add clock parsing
Signed-off-by: Grant Likely <grant.likely@...retlab.ca>
---
arch/arm/boot/dts/versatile-ab.dts | 37 ++++++++++++++++++++++++++++++++
arch/arm/boot/dts/versatile-pb.dts | 2 +
arch/arm/mach-versatile/core.c | 37 +------------------------------
arch/arm/mach-versatile/versatile_dt.c | 33 ++++++++++++++++++++++++++++
4 files changed, 74 insertions(+), 35 deletions(-)
diff --git a/arch/arm/boot/dts/versatile-ab.dts b/arch/arm/boot/dts/versatile-ab.dts
index 0b32925..cb8a49e 100644
--- a/arch/arm/boot/dts/versatile-ab.dts
+++ b/arch/arm/boot/dts/versatile-ab.dts
@@ -19,6 +19,35 @@
reg = <0x0 0x08000000>;
};
+ clocks {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ ref24_clk: clock0 {
+ compatible = "fixed-clock";
+ #clock-cells = <1>;
+ clock-frequency = <24000000>;
+ clock-output-names = "ref";
+ };
+
+ sp804_clk: clock1 {
+ compatible = "fixed-clock";
+ #clock-cells = <1>;
+ clock-frequency = <1000000>;
+ clock-output-names = "ref";
+ };
+
+ osc4_clk: clock3 {
+ compatible = "ics,icst307";
+ #clock-cells = <1>;
+ ref = <24000>;
+ vco-max = <200000>;
+ vd-range = <12 519>;
+ rd-range = <3 129>;
+ clock-output-names = "osc4";
+ };
+ };
+
flash@...00000 {
compatible = "arm,versatile-flash";
reg = <0x34000000 0x4000000>;
@@ -80,18 +109,21 @@
compatible = "arm,pl011", "arm,primecell";
reg = <0x101f1000 0x1000>;
interrupts = <12>;
+ clock = <&ref24_clk 0>;
};
uart1: uart@...f2000 {
compatible = "arm,pl011", "arm,primecell";
reg = <0x101f2000 0x1000>;
interrupts = <13>;
+ clock = <&ref24_clk 0>;
};
uart2: uart@...f3000 {
compatible = "arm,pl011", "arm,primecell";
reg = <0x101f3000 0x1000>;
interrupts = <14>;
+ clock = <&ref24_clk 0>;
};
smc@...00000 {
@@ -108,6 +140,7 @@
compatible = "arm,pl110", "arm,primecell";
reg = <0x10120000 0x1000>;
interrupts = <16>;
+ clock = <&osc4_clk 0>;
};
sctl@...e0000 {
@@ -157,6 +190,7 @@
compatible = "arm,pl022", "arm,primecell";
reg = <0x101f4000 0x1000>;
interrupts = <11>;
+ clock = <&ref24_clk 0>;
};
fpga {
@@ -174,18 +208,21 @@
compatible = "arm,primecell";
reg = < 0x5000 0x1000>;
interrupts = <22>;
+ clock = <&ref24_clk 0>;
};
kmi@...0 {
compatible = "arm,pl050", "arm,primecell";
reg = <0x6000 0x1000>;
interrupt-parent = <&sic>;
interrupts = <3>;
+ clock = <&ref24_clk 0>;
};
kmi@...0 {
compatible = "arm,pl050", "arm,primecell";
reg = <0x7000 0x1000>;
interrupt-parent = <&sic>;
interrupts = <4>;
+ clock = <&ref24_clk 0>;
};
};
};
diff --git a/arch/arm/boot/dts/versatile-pb.dts b/arch/arm/boot/dts/versatile-pb.dts
index 1664610..05e014a 100644
--- a/arch/arm/boot/dts/versatile-pb.dts
+++ b/arch/arm/boot/dts/versatile-pb.dts
@@ -31,6 +31,7 @@
reg = <0x9000 0x1000>;
interrupt-parent = <&sic>;
interrupts = <6>;
+ clock = <&ref24_clk 0>;
};
sci@...0 {
compatible = "arm,primecell";
@@ -42,6 +43,7 @@
compatible = "arm,primecell";
reg = <0xb000 0x1000>;
interrupts = <23>;
+ clock = <&ref24_clk 0>;
};
};
};
diff --git a/arch/arm/mach-versatile/core.c b/arch/arm/mach-versatile/core.c
index e340a54..4cd9822 100644
--- a/arch/arm/mach-versatile/core.c
+++ b/arch/arm/mach-versatile/core.c
@@ -666,44 +666,11 @@ static struct amba_device *amba_devs[] __initdata = {
/*
* Lookup table for attaching a specific name and platform_data pointer to
* devices as they get created by of_platform_populate(). Ideally this table
- * would not exist, but the current clock implementation depends on some devices
- * having a specific name.
+ * would not exist, but some devices still need platform data.
*/
struct of_dev_auxdata versatile_auxdata_lookup[] __initdata = {
- OF_DEV_AUXDATA("arm,primecell", VERSATILE_MMCI0_BASE, "fpga:05", NULL),
- OF_DEV_AUXDATA("arm,primecell", VERSATILE_KMI0_BASE, "fpga:06", NULL),
- OF_DEV_AUXDATA("arm,primecell", VERSATILE_KMI1_BASE, "fpga:07", NULL),
- OF_DEV_AUXDATA("arm,primecell", VERSATILE_UART3_BASE, "fpga:09", NULL),
- OF_DEV_AUXDATA("arm,primecell", VERSATILE_MMCI1_BASE, "fpga:0b", NULL),
-
- OF_DEV_AUXDATA("arm,primecell", VERSATILE_CLCD_BASE, "dev:20", &clcd_plat_data),
- OF_DEV_AUXDATA("arm,primecell", VERSATILE_UART0_BASE, "dev:f1", NULL),
- OF_DEV_AUXDATA("arm,primecell", VERSATILE_UART1_BASE, "dev:f2", NULL),
- OF_DEV_AUXDATA("arm,primecell", VERSATILE_UART2_BASE, "dev:f3", NULL),
- OF_DEV_AUXDATA("arm,primecell", VERSATILE_SSP_BASE, "dev:f4", NULL),
-#if 0
- /*
- * These entries are unnecessary because no clocks referencing
- * them. I've left them in for now as place holders in case
- * any of them need to be added back, but they should be
- * removed before actually committing this patch. --gcl
- */
- OF_DEV_AUXDATA("arm,primecell", VERSATILE_AACI_BASE, "fpga:04", NULL),
- OF_DEV_AUXDATA("arm,primecell", VERSATILE_SCI1_BASE, "fpga:0a", NULL),
- OF_DEV_AUXDATA("arm,primecell", VERSATILE_SMC_BASE, "dev:00", NULL),
- OF_DEV_AUXDATA("arm,primecell", VERSATILE_MPMC_BASE, "dev:10", NULL),
- OF_DEV_AUXDATA("arm,primecell", VERSATILE_DMAC_BASE, "dev:30", NULL),
-
- OF_DEV_AUXDATA("arm,primecell", VERSATILE_SCTL_BASE, "dev:e0", NULL),
- OF_DEV_AUXDATA("arm,primecell", VERSATILE_WATCHDOG_BASE, "dev:e1", NULL),
- OF_DEV_AUXDATA("arm,primecell", VERSATILE_GPIO0_BASE, "dev:e4", NULL),
- OF_DEV_AUXDATA("arm,primecell", VERSATILE_GPIO1_BASE, "dev:e5", NULL),
- OF_DEV_AUXDATA("arm,primecell", VERSATILE_GPIO2_BASE, "dev:e6", NULL),
- OF_DEV_AUXDATA("arm,primecell", VERSATILE_GPIO3_BASE, "dev:e7", NULL),
- OF_DEV_AUXDATA("arm,primecell", VERSATILE_RTC_BASE, "dev:e8", NULL),
- OF_DEV_AUXDATA("arm,primecell", VERSATILE_SCI_BASE, "dev:f0", NULL),
-#endif
+ OF_DEV_AUXDATA("arm,primecell", VERSATILE_CLCD_BASE, NULL, &clcd_plat_data),
{}
};
#endif
diff --git a/arch/arm/mach-versatile/versatile_dt.c b/arch/arm/mach-versatile/versatile_dt.c
index 54e037c..f11f6d0 100644
--- a/arch/arm/mach-versatile/versatile_dt.c
+++ b/arch/arm/mach-versatile/versatile_dt.c
@@ -24,13 +24,46 @@
#include <linux/init.h>
#include <linux/of_irq.h>
#include <linux/of_platform.h>
+#include <linux/of_clk.h>
+#include <linux/slab.h>
+
+#include <mach/hardware.h>
+#include <mach/clkdev.h>
+#include <asm/irq.h>
#include <asm/mach-types.h>
#include <asm/mach/arch.h>
#include "core.h"
+/* Scan for fixed clocks */
+static struct clk *versatile_dt_clk_get(struct of_phandle_args *a, void *data)
+{
+ return data;
+}
+
static void __init versatile_dt_init(void)
{
+ struct device_node *node;
+ struct clk *clk;
+ int rc;
+
+ for_each_compatible_node(node, NULL, "fixed-clock") {
+ u32 rate;
+ if (of_property_read_u32(node, "clock-frequency", &rate))
+ continue;
+
+ clk = kzalloc(sizeof(*clk), GFP_KERNEL);
+ if (!clk)
+ panic("out of memory\n");
+ clk->rate = rate;
+
+ rc = of_clk_add_provider(node, versatile_dt_clk_get, clk);
+ if (rc) {
+ kfree(clk);
+ pr_err("error adding fixed clk %s\n", node->name);
+ }
+ }
+
of_platform_populate(NULL, of_default_bus_match_table,
versatile_auxdata_lookup, NULL);
}
--
1.7.5.4
--
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