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Diffstat (limited to 'arch/arm/mach-shmobile/clock-r8a7779.c')
-rw-r--r--arch/arm/mach-shmobile/clock-r8a7779.c105
1 files changed, 105 insertions, 0 deletions
diff --git a/arch/arm/mach-shmobile/clock-r8a7779.c b/arch/arm/mach-shmobile/clock-r8a7779.c
new file mode 100644
index 000000000000..8a901068a53c
--- /dev/null
+++ b/arch/arm/mach-shmobile/clock-r8a7779.c
@@ -0,0 +1,105 @@
+/*
+ * r8a7779 clock framework support
+ *
+ * Copyright (C) 2011 Renesas Solutions Corp.
+ * Copyright (C) 2011 Magnus Damm
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/io.h>
+#include <linux/sh_clk.h>
+#include <linux/clkdev.h>
+#include <mach/common.h>
+
+#define FRQMR 0xffc80014
+#define MSTPCR0 0xffc80030
+#define MSTPCR1 0xffc80034
+#define MSTPCR3 0xffc8003c
+#define MSTPSR1 0xffc80044
+#define MSTPSR4 0xffc80048
+#define MSTPSR6 0xffc8004c
+#define MSTPCR4 0xffc80050
+#define MSTPCR5 0xffc80054
+#define MSTPCR6 0xffc80058
+#define MSTPCR7 0xffc80040
+
+/* ioremap() through clock mapping mandatory to avoid
+ * collision with ARM coherent DMA virtual memory range.
+ */
+
+static struct clk_mapping cpg_mapping = {
+ .phys = 0xffc80000,
+ .len = 0x80,
+};
+
+static struct clk clkp = {
+ .rate = 62500000, /* FIXME: shortcut */
+ .flags = CLK_ENABLE_ON_INIT,
+ .mapping = &cpg_mapping,
+};
+
+static struct clk *main_clks[] = {
+ &clkp,
+};
+
+enum { MSTP026, MSTP025, MSTP024, MSTP023, MSTP022, MSTP021,
+ MSTP016, MSTP015, MSTP014,
+ MSTP_NR };
+
+#define MSTP(_parent, _reg, _bit, _flags) \
+ SH_CLK_MSTP32(_parent, _reg, _bit, _flags)
+
+static struct clk mstp_clks[MSTP_NR] = {
+ [MSTP026] = MSTP(&clkp, MSTPCR0, 26, 0), /* SCIF0 */
+ [MSTP025] = MSTP(&clkp, MSTPCR0, 25, 0), /* SCIF1 */
+ [MSTP024] = MSTP(&clkp, MSTPCR0, 24, 0), /* SCIF2 */
+ [MSTP023] = MSTP(&clkp, MSTPCR0, 23, 0), /* SCIF3 */
+ [MSTP022] = MSTP(&clkp, MSTPCR0, 22, 0), /* SCIF4 */
+ [MSTP021] = MSTP(&clkp, MSTPCR0, 21, 0), /* SCIF5 */
+ [MSTP016] = MSTP(&clkp, MSTPCR0, 16, 0), /* TMU0 */
+ [MSTP015] = MSTP(&clkp, MSTPCR0, 15, 0), /* TMU1 */
+ [MSTP014] = MSTP(&clkp, MSTPCR0, 14, 0), /* TMU2 */
+};
+
+static struct clk_lookup lookups[] = {
+ /* MSTP32 clocks */
+ CLKDEV_DEV_ID("sh_tmu.0", &mstp_clks[MSTP016]), /* TMU00 */
+ CLKDEV_DEV_ID("sh_tmu.1", &mstp_clks[MSTP016]), /* TMU01 */
+ CLKDEV_DEV_ID("sh-sci.0", &mstp_clks[MSTP026]), /* SCIF0 */
+ CLKDEV_DEV_ID("sh-sci.1", &mstp_clks[MSTP025]), /* SCIF1 */
+ CLKDEV_DEV_ID("sh-sci.2", &mstp_clks[MSTP024]), /* SCIF2 */
+ CLKDEV_DEV_ID("sh-sci.3", &mstp_clks[MSTP023]), /* SCIF3 */
+ CLKDEV_DEV_ID("sh-sci.4", &mstp_clks[MSTP022]), /* SCIF4 */
+ CLKDEV_DEV_ID("sh-sci.5", &mstp_clks[MSTP021]), /* SCIF6 */
+};
+
+void __init r8a7779_clock_init(void)
+{
+ int k, ret = 0;
+
+ for (k = 0; !ret && (k < ARRAY_SIZE(main_clks)); k++)
+ ret = clk_register(main_clks[k]);
+
+ if (!ret)
+ ret = sh_clk_mstp32_register(mstp_clks, MSTP_NR);
+
+ clkdev_add_table(lookups, ARRAY_SIZE(lookups));
+
+ if (!ret)
+ clk_init();
+ else
+ panic("failed to setup r8a7779 clocks\n");
+}