summaryrefslogtreecommitdiffstats
path: root/arch/sh/kernel/cpu/sh2a/clock-sh7201.c
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2008-12-28 11:39:19 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2008-12-28 11:39:19 -0800
commit81d6e59dabb1ae0c782e9eb7e3d88f699d25b314 (patch)
tree532afd14c119f1c95206ef0d23db9c4c26a0aa34 /arch/sh/kernel/cpu/sh2a/clock-sh7201.c
parent4a6908a3a050aacc9c3a2f36b276b46c0629ad91 (diff)
parent59de580af1c2fd671b0cb27c41ff958859ae5288 (diff)
Merge git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6: (132 commits) sh: oprofile: Fix up the module build. sh: add UIO support for JPU on SH7722. serial: sh-sci: Fix up port pinmux for SH7366. sh: mach-rsk: Use uImage generation by default for rsk7201/7203. sh: mach-sh03: Fix up pata_platform build breakage. sh: enable deferred io LCDC on Migo-R video: sh_mobile_lcdcfb deferred io support video: deferred io with physically contiguous memory video: deferred io cleanup video: fix deferred io fsync() sh: add LCDC interrupt configuration to AP325 and Migo-R sh_mobile_lcdc: use FB_SYS helpers instead of FB_CFB sh: split coherent pages sh: dma: Kill off ISA DMA wrapper. sh: Conditionalize the code dumper on CONFIG_DUMP_CODE. sh: Kill off the unused SH_ALPHANUMERIC debug option. sh: Enable skipping of bss on debug platforms for sh32 also. doc: Update sh cpufreq documentation. sh: mrshpc_setup_windows() needs to be inline. serial: sh-sci: sci_poll_get_char() is only used by CONFIG_CONSOLE_POLL. ...
Diffstat (limited to 'arch/sh/kernel/cpu/sh2a/clock-sh7201.c')
-rw-r--r--arch/sh/kernel/cpu/sh2a/clock-sh7201.c85
1 files changed, 85 insertions, 0 deletions
diff --git a/arch/sh/kernel/cpu/sh2a/clock-sh7201.c b/arch/sh/kernel/cpu/sh2a/clock-sh7201.c
new file mode 100644
index 00000000000..020a96fe961
--- /dev/null
+++ b/arch/sh/kernel/cpu/sh2a/clock-sh7201.c
@@ -0,0 +1,85 @@
+/*
+ * arch/sh/kernel/cpu/sh2a/clock-sh7201.c
+ *
+ * SH7201 support for the clock framework
+ *
+ * Copyright (C) 2008 Peter Griffin <pgriffin@mpc-data.co.uk>
+ *
+ * Based on clock-sh4.c
+ * Copyright (C) 2005 Paul Mundt
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <asm/clock.h>
+#include <asm/freq.h>
+#include <asm/io.h>
+
+const static int pll1rate[]={1,2,3,4,6,8};
+const static int pfc_divisors[]={1,2,3,4,6,8,12};
+#define ifc_divisors pfc_divisors
+
+#if (CONFIG_SH_CLK_MD == 0)
+#define PLL2 (4)
+#elif (CONFIG_SH_CLK_MD == 2)
+#define PLL2 (2)
+#elif (CONFIG_SH_CLK_MD == 3)
+#define PLL2 (1)
+#else
+#error "Illegal Clock Mode!"
+#endif
+
+static void master_clk_init(struct clk *clk)
+{
+ clk->rate = 10000000 * PLL2 * pll1rate[(ctrl_inw(FREQCR) >> 8) & 0x0007];
+}
+
+static struct clk_ops sh7201_master_clk_ops = {
+ .init = master_clk_init,
+};
+
+static void module_clk_recalc(struct clk *clk)
+{
+ int idx = (ctrl_inw(FREQCR) & 0x0007);
+ clk->rate = clk->parent->rate / pfc_divisors[idx];
+}
+
+static struct clk_ops sh7201_module_clk_ops = {
+ .recalc = module_clk_recalc,
+};
+
+static void bus_clk_recalc(struct clk *clk)
+{
+ int idx = (ctrl_inw(FREQCR) & 0x0007);
+ clk->rate = clk->parent->rate / pfc_divisors[idx];
+}
+
+static struct clk_ops sh7201_bus_clk_ops = {
+ .recalc = bus_clk_recalc,
+};
+
+static void cpu_clk_recalc(struct clk *clk)
+{
+ int idx = ((ctrl_inw(FREQCR) >> 4) & 0x0007);
+ clk->rate = clk->parent->rate / ifc_divisors[idx];
+}
+
+static struct clk_ops sh7201_cpu_clk_ops = {
+ .recalc = cpu_clk_recalc,
+};
+
+static struct clk_ops *sh7201_clk_ops[] = {
+ &sh7201_master_clk_ops,
+ &sh7201_module_clk_ops,
+ &sh7201_bus_clk_ops,
+ &sh7201_cpu_clk_ops,
+};
+
+void __init arch_init_clk_ops(struct clk_ops **ops, int idx)
+{
+ if (idx < ARRAY_SIZE(sh7201_clk_ops))
+ *ops = sh7201_clk_ops[idx];
+}