[PATCH] ARM: 2831/1: S3C2440 - split s3c2440 clocks from central clock code

Patch from Ben Dooks

Split the s3c2440 specific clocks from the arch clock support, to
make the code clearer.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 116 insertions, 0 deletions

diff --git a/arch/arm/mach-s3c2410/s3c2440-clock.c b/arch/arm/mach-s3c2410/s3c2440-clock.c
new file mode 100644
index 000000000000..b018a1f680ce
--- /dev/null
+++ b/arch/arm/mach-s3c2410/s3c2440-clock.c
@@ -0,0 +1,116 @@
+/* linux/arch/arm/mach-s3c2410/s3c2440-clock.c
+ *
+ * Copyright (c) 2004-2005 Simtec Electronics
+ *      http://armlinux.simtec.co.uk/
+ *      Ben Dooks <ben@simtec.co.uk>
+ *
+ * S3C2440 Clock support
+ *
+ * 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, or
+ * (at your option) any later version.
+ *
+ * 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/module.h>
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/errno.h>
+#include <linux/err.h>
+#include <linux/device.h>
+#include <linux/sysdev.h>
+
+#include <linux/interrupt.h>
+#include <linux/ioport.h>
+
+#include <asm/hardware.h>
+#include <asm/atomic.h>
+#include <asm/irq.h>
+#include <asm/io.h>
+
+#include <asm/hardware/clock.h>
+#include <asm/arch/regs-clock.h>
+
+#include "clock.h"
+#include "cpu.h"
+
+/* S3C2440 extended clock support */
+
+static struct clk s3c2440_clk_upll = {
+        .name           = "upll",
+        .id             = -1,
+};
+
+static struct clk s3c2440_clk_cam = {
+        .name           = "camif",
+        .id             = -1,
+        .enable         = s3c24xx_clkcon_enable,
+        .ctrlbit        = S3C2440_CLKCON_CAMERA,
+};
+
+static struct clk s3c2440_clk_ac97 = {
+        .name           = "ac97",
+        .id             = -1,
+        .enable         = s3c24xx_clkcon_enable,
+        .ctrlbit        = S3C2440_CLKCON_CAMERA,
+};
+
+static int s3c2440_clk_add(struct sys_device *sysdev)
+{
+        unsigned long upllcon = __raw_readl(S3C2410_UPLLCON);
+        struct clk *clk_h;
+        struct clk *clk_p;
+        struct clk *clk_xtal;
+
+        clk_xtal = clk_get(NULL, "xtal");
+        if (IS_ERR(clk_xtal)) {
+                printk(KERN_ERR "S3C2440: Failed to get clk_xtal\n");
+                return -EINVAL;
+        }
+
+        s3c2440_clk_upll.rate = s3c2410_get_pll(upllcon, clk_xtal->rate);
+
+        printk("S3C2440: Clock Support, UPLL %ld.%03ld MHz\n",
+               print_mhz(s3c2440_clk_upll.rate));
+
+        clk_p = clk_get(NULL, "pclk");
+        clk_h = clk_get(NULL, "hclk");
+
+        if (IS_ERR(clk_p) || IS_ERR(clk_h)) {
+                printk(KERN_ERR "S3C2440: Failed to get parent clocks\n");
+                return -EINVAL;
+        }
+
+        s3c2440_clk_cam.parent = clk_h;
+        s3c2440_clk_ac97.parent = clk_p;
+
+        s3c24xx_register_clock(&s3c2440_clk_ac97);
+        s3c24xx_register_clock(&s3c2440_clk_cam);
+        s3c24xx_register_clock(&s3c2440_clk_upll);
+
+        clk_disable(&s3c2440_clk_ac97);
+        clk_disable(&s3c2440_clk_cam);
+
+        return 0;
+}
+
+static struct sysdev_driver s3c2440_clk_driver = {
+        .add    = s3c2440_clk_add,
+};
+
+static __init int s3c24xx_clk_driver(void)
+{
+        return sysdev_driver_register(&s3c2440_sysclass, &s3c2440_clk_driver);
+}
+
+arch_initcall(s3c24xx_clk_driver);