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path: root/drivers/clk/versatile/clk-realview.c
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Diffstat (limited to 'drivers/clk/versatile/clk-realview.c')
-rw-r--r--drivers/clk/versatile/clk-realview.c65
1 files changed, 22 insertions, 43 deletions
diff --git a/drivers/clk/versatile/clk-realview.c b/drivers/clk/versatile/clk-realview.c
index e21a99cef378..cda07e70a408 100644
--- a/drivers/clk/versatile/clk-realview.c
+++ b/drivers/clk/versatile/clk-realview.c
@@ -1,3 +1,11 @@
+/*
+ * Clock driver for the ARM RealView boards
+ * 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.h>
#include <linux/clkdev.h>
#include <linux/err.h>
@@ -13,38 +21,6 @@
* Implementation of the ARM RealView clock trees.
*/
-static void __iomem *sys_lock;
-static void __iomem *sys_vcoreg;
-
-/**
- * realview_oscvco_get() - get ICST OSC settings for the RealView
- */
-static struct icst_vco realview_oscvco_get(void)
-{
- u32 val;
- struct icst_vco vco;
-
- val = readl(sys_vcoreg);
- vco.v = val & 0x1ff;
- vco.r = (val >> 9) & 0x7f;
- vco.s = (val >> 16) & 03;
- return vco;
-}
-
-static void realview_oscvco_set(struct icst_vco vco)
-{
- u32 val;
-
- val = readl(sys_vcoreg) & ~0x7ffff;
- val |= vco.v | (vco.r << 9) | (vco.s << 16);
-
- /* This magic unlocks the CM VCO so it can be controlled */
- writel(0xa05f, sys_lock);
- writel(val, sys_vcoreg);
- /* This locks the CM again */
- writel(0, sys_lock);
-}
-
static const struct icst_params realview_oscvco_params = {
.ref = 24000000,
.vco_max = ICST307_VCO_MAX,
@@ -57,10 +33,16 @@ static const struct icst_params realview_oscvco_params = {
.idx2s = icst307_idx2s,
};
-static const struct clk_icst_desc __initdata realview_icst_desc = {
+static const struct clk_icst_desc __initdata realview_osc0_desc = {
+ .params = &realview_oscvco_params,
+ .vco_offset = REALVIEW_SYS_OSC0_OFFSET,
+ .lock_offset = REALVIEW_SYS_LOCK_OFFSET,
+};
+
+static const struct clk_icst_desc __initdata realview_osc4_desc = {
.params = &realview_oscvco_params,
- .getvco = realview_oscvco_get,
- .setvco = realview_oscvco_set,
+ .vco_offset = REALVIEW_SYS_OSC4_OFFSET,
+ .lock_offset = REALVIEW_SYS_LOCK_OFFSET,
};
/*
@@ -70,13 +52,6 @@ void __init realview_clk_init(void __iomem *sysbase, bool is_pb1176)
{
struct clk *clk;
- sys_lock = sysbase + REALVIEW_SYS_LOCK_OFFSET;
- if (is_pb1176)
- sys_vcoreg = sysbase + REALVIEW_SYS_OSC0_OFFSET;
- else
- sys_vcoreg = sysbase + REALVIEW_SYS_OSC4_OFFSET;
-
-
/* APB clock dummy */
clk = clk_register_fixed_rate(NULL, "apb_pclk", NULL, CLK_IS_ROOT, 0);
clk_register_clkdev(clk, "apb_pclk", NULL);
@@ -108,7 +83,11 @@ void __init realview_clk_init(void __iomem *sysbase, bool is_pb1176)
clk_register_clkdev(clk, NULL, "sp804");
/* ICST VCO clock */
- clk = icst_clk_register(NULL, &realview_icst_desc);
+ if (is_pb1176)
+ clk = icst_clk_register(NULL, &realview_osc0_desc, sysbase);
+ else
+ clk = icst_clk_register(NULL, &realview_osc4_desc, sysbase);
+
clk_register_clkdev(clk, NULL, "dev:clcd");
clk_register_clkdev(clk, NULL, "issp:clcd");
}