clk: move IM-PD1 clocks to drivers/clk

The ARM IM-PD1 add-on module has a few clock of its own, let's
move also these down to the drivers/clk/versatile driver dir
and get rid of any remaining oldschool Integrator clocks.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>

4 files changed, 103 insertions, 66 deletions

diff --git a/arch/arm/mach-integrator/impd1.c b/arch/arm/mach-integrator/impd1.c
index e428f3ab15c7..b3d86d7081a0 100644
--- a/arch/arm/mach-integrator/impd1.c
+++ b/arch/arm/mach-integrator/impd1.c
@@ -21,10 +21,9 @@
 #include <linux/amba/bus.h>
 #include <linux/amba/clcd.h>
 #include <linux/io.h>
+#include <linux/platform_data/clk-integrator.h>
 #include <linux/slab.h>
-#include <linux/clkdev.h>
 
-#include <asm/hardware/icst.h>
 #include <mach/lm.h>
 #include <mach/impd1.h>
 #include <asm/sizes.h>
@@ -36,45 +35,6 @@ MODULE_PARM_DESC(lmid, "logic module stack position");
 
 struct impd1_module {
 	void __iomem	*base;
-	struct clk	vcos[2];
-	struct clk_lookup *clks[3];
-};
-
-static const struct icst_params impd1_vco_params = {
-	.ref		= 24000000,	/* 24 MHz */
-	.vco_max	= ICST525_VCO_MAX_3V,
-	.vco_min	= ICST525_VCO_MIN,
-	.vd_min		= 12,
-	.vd_max		= 519,
-	.rd_min		= 3,
-	.rd_max		= 120,
-	.s2div		= icst525_s2div,
-	.idx2s		= icst525_idx2s,
-};
-
-static void impd1_setvco(struct clk *clk, struct icst_vco vco)
-{
-	struct impd1_module *impd1 = clk->data;
-	u32 val = vco.v | (vco.r << 9) | (vco.s << 16);
-
-	writel(0xa05f, impd1->base + IMPD1_LOCK);
-	writel(val, clk->vcoreg);
-	writel(0, impd1->base + IMPD1_LOCK);
-
-#ifdef DEBUG
-	vco.v = val & 0x1ff;
-	vco.r = (val >> 9) & 0x7f;
-	vco.s = (val >> 16) & 7;
-
-	pr_debug("IM-PD1: VCO%d clock is %ld Hz\n",
-		 vconr, icst525_hz(&impd1_vco_params, vco));
-#endif
-}
-
-static const struct clk_ops impd1_clk_ops = {
-	.round	= icst_clk_round,
-	.set	= icst_clk_set,
-	.setvco	= impd1_setvco,
 };
 
 void impd1_tweak_control(struct device *dev, u32 mask, u32 val)
@@ -344,10 +304,6 @@ static struct impd1_device impd1_devs[] = {
 	}
 };
 
-static struct clk fixed_14745600 = {
-	.rate = 14745600,
-};
-
 static int impd1_probe(struct lm_device *dev)
 {
 	struct impd1_module *impd1;
@@ -376,23 +332,7 @@ static int impd1_probe(struct lm_device *dev)
 	printk("IM-PD1 found at 0x%08lx\n",
 		(unsigned long)dev->resource.start);
 
-	for (i = 0; i < ARRAY_SIZE(impd1->vcos); i++) {
-		impd1->vcos[i].ops = &impd1_clk_ops,
-		impd1->vcos[i].owner = THIS_MODULE,
-		impd1->vcos[i].params = &impd1_vco_params,
-		impd1->vcos[i].data = impd1;
-	}
-	impd1->vcos[0].vcoreg = impd1->base + IMPD1_OSC1;
-	impd1->vcos[1].vcoreg = impd1->base + IMPD1_OSC2;
-
-	impd1->clks[0] = clkdev_alloc(&impd1->vcos[0], NULL, "lm%x:01000",
-					dev->id);
-	impd1->clks[1] = clkdev_alloc(&fixed_14745600, NULL, "lm%x:00100",
-					dev->id);
-	impd1->clks[2] = clkdev_alloc(&fixed_14745600, NULL, "lm%x:00200",
-					dev->id);
-	for (i = 0; i < ARRAY_SIZE(impd1->clks); i++)
-		clkdev_add(impd1->clks[i]);
+	integrator_impd1_clk_init(impd1->base, dev->id);
 
 	for (i = 0; i < ARRAY_SIZE(impd1_devs); i++) {
 		struct impd1_device *idev = impd1_devs + i;
@@ -431,12 +371,9 @@ static int impd1_remove_one(struct device *dev, void *data)
 static void impd1_remove(struct lm_device *dev)
 {
 	struct impd1_module *impd1 = lm_get_drvdata(dev);
-	int i;
 
 	device_for_each_child(&dev->dev, NULL, impd1_remove_one);
-
-	for (i = 0; i < ARRAY_SIZE(impd1->clks); i++)
-		clkdev_drop(impd1->clks[i]);
+	integrator_impd1_clk_exit(dev->id);
 
 	lm_set_drvdata(dev, NULL);
 
diff --git a/drivers/clk/versatile/Makefile b/drivers/clk/versatile/Makefile
index c776053e5bb4..ec3b88fe3e6d 100644
--- a/drivers/clk/versatile/Makefile
+++ b/drivers/clk/versatile/Makefile
@@ -1,6 +1,7 @@
 # Makefile for Versatile-specific clocks
 obj-$(CONFIG_ICST)		+= clk-icst.o
 obj-$(CONFIG_ARCH_INTEGRATOR)	+= clk-integrator.o
+obj-$(CONFIG_INTEGRATOR_IMPD1)	+= clk-impd1.o
 obj-$(CONFIG_ARCH_REALVIEW)	+= clk-realview.o
 obj-$(CONFIG_ARCH_VEXPRESS)	+= clk-vexpress.o
 obj-$(CONFIG_VEXPRESS_CONFIG)	+= clk-vexpress-osc.o
diff --git a/drivers/clk/versatile/clk-impd1.c b/drivers/clk/versatile/clk-impd1.c
new file mode 100644
index 000000000000..369139af2a3b
--- /dev/null
+++ b/drivers/clk/versatile/clk-impd1.c
@@ -0,0 +1,97 @@
+/*
+ * Clock driver for the ARM Integrator/IM-PD1 board
+ * Copyright (C) 2012 Linus Walleij
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/clk-provider.h>
+#include <linux/clk.h>
+#include <linux/clkdev.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/platform_data/clk-integrator.h>
+
+#include <mach/impd1.h>
+
+#include "clk-icst.h"
+
+struct impd1_clk {
+	struct clk *vcoclk;
+	struct clk *uartclk;
+	struct clk_lookup *clks[3];
+};
+
+static struct impd1_clk impd1_clks[4];
+
+/*
+ * There are two VCO's on the IM-PD1 but only one is used by the
+ * kernel, that is why we are only implementing the control of
+ * IMPD1_OSC1 here.
+ */
+
+static const struct icst_params impd1_vco_params = {
+	.ref		= 24000000,	/* 24 MHz */
+	.vco_max	= ICST525_VCO_MAX_3V,
+	.vco_min	= ICST525_VCO_MIN,
+	.vd_min		= 12,
+	.vd_max		= 519,
+	.rd_min		= 3,
+	.rd_max		= 120,
+	.s2div		= icst525_s2div,
+	.idx2s		= icst525_idx2s,
+};
+
+static const struct clk_icst_desc impd1_icst1_desc = {
+	.params = &impd1_vco_params,
+	.vco_offset = IMPD1_OSC1,
+	.lock_offset = IMPD1_LOCK,
+};
+
+/**
+ * integrator_impd1_clk_init() - set up the integrator clock tree
+ * @base: base address of the logic module (LM)
+ * @id: the ID of this LM
+ */
+void integrator_impd1_clk_init(void __iomem *base, unsigned int id)
+{
+	struct impd1_clk *imc;
+	struct clk *clk;
+	int i;
+
+	if (id > 3) {
+		pr_crit("no more than 4 LMs can be attached\n");
+		return;
+	}
+	imc = &impd1_clks[id];
+
+	clk = icst_clk_register(NULL, &impd1_icst1_desc, base);
+	imc->vcoclk = clk;
+	imc->clks[0] = clkdev_alloc(clk, NULL, "lm%x:01000", id);
+
+	/* UART reference clock */
+	clk = clk_register_fixed_rate(NULL, "uartclk", NULL, CLK_IS_ROOT,
+				14745600);
+	imc->uartclk = clk;
+	imc->clks[1] = clkdev_alloc(clk, NULL, "lm%x:00100", id);
+	imc->clks[2] = clkdev_alloc(clk, NULL, "lm%x:00200", id);
+
+	for (i = 0; i < ARRAY_SIZE(imc->clks); i++)
+		clkdev_add(imc->clks[i]);
+}
+
+void integrator_impd1_clk_exit(unsigned int id)
+{
+	int i;
+	struct impd1_clk *imc;
+
+	if (id > 3)
+		return;
+	imc = &impd1_clks[id];
+
+	for (i = 0; i < ARRAY_SIZE(imc->clks); i++)
+		clkdev_drop(imc->clks[i]);
+	clk_unregister(imc->uartclk);
+	clk_unregister(imc->vcoclk);
+}
diff --git a/include/linux/platform_data/clk-integrator.h b/include/linux/platform_data/clk-integrator.h
index 83fe9c283bb8..280edac9d0a5 100644
--- a/include/linux/platform_data/clk-integrator.h
+++ b/include/linux/platform_data/clk-integrator.h
@@ -1 +1,3 @@
 void integrator_clk_init(bool is_cp);
+void integrator_impd1_clk_init(void __iomem *base, unsigned int id);
+void integrator_impd1_clk_exit(unsigned int id);