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authorOlof Johansson <olof@lixom.net>2012-03-08 17:53:14 +0100
committerOlof Johansson <olof@lixom.net>2012-03-08 17:53:14 +0100
commitd60d506e6baaf423148c458df3ece0c1d440dce4 (patch)
treec25c44e70ebaaddcbe39559df5c5cd260e956be4 /arch/arm/mach-s3c24xx/s3c2442.c
parentMerge branch 'next/cleanup-use-static' of git://git.kernel.org/pub/scm/linux/... (diff)
parentARM: S3C24XX: remove call to s3c24xx_setup_clocks (diff)
downloadlinux-d60d506e6baaf423148c458df3ece0c1d440dce4.tar.xz
linux-d60d506e6baaf423148c458df3ece0c1d440dce4.zip
Merge branch 'next/cleanup-s3c24xx' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung into next/cleanup
* 'next/cleanup-s3c24xx' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung: (24 commits) ARM: S3C24XX: remove call to s3c24xx_setup_clocks ARM: S3C24XX: add get_rate for clk_p on S3C2416/2443 ARM: S3C24XX: add get_rate for clk_h on S3C2416/2443 ARM: S3C24XX: remove XXX_setup_clocks method from S3C2443 ARM: S3C24XX: remove obsolete S3C2416_DMA option ARM: S3C24XX: Reuse S3C2443 dma for S3C2416 ARM: S3C24XX: Fix indentation of dma-s3c2443 ARM: S3C24XX: Move device setup files to mach directory ARM: S3C24XX: Consolidate Simtec extensions ARM: S3C24XX: move simtec-specific code to mach directory ARM: S3C24XX: Move common-smdk code to mach directory ARM: S3C24XX: Move s3c2443-clock.c to mach-s3c24xx ARM: s3c2410_defconfig: update s3c2410_defconfig ARM: S3C2443: move mach-s3c2443/* into mach-s3c24xx/ ARM: S3C2440: move mach-s3c2440/* into mach-s3c24xx/ ARM: S3C2416: move mach-s3c2416/* into mach-s3c24xx/ ARM: S3C2412: move mach-s3c2412/* into mach-s3c24xx/ ARM: S3C2410: move mach-s3c2410/* into mach-s3c24xx/ ARM: S3C24XX: change the ARCH_S3C2410 to ARCH_S3C24XX ARM: S3C2410: move s3c2410_baseclk_add to clock.h ...
Diffstat (limited to 'arch/arm/mach-s3c24xx/s3c2442.c')
-rw-r--r--arch/arm/mach-s3c24xx/s3c2442.c188
1 files changed, 188 insertions, 0 deletions
diff --git a/arch/arm/mach-s3c24xx/s3c2442.c b/arch/arm/mach-s3c24xx/s3c2442.c
new file mode 100644
index 000000000000..22cb7c94a8c8
--- /dev/null
+++ b/arch/arm/mach-s3c24xx/s3c2442.c
@@ -0,0 +1,188 @@
+/* linux/arch/arm/mach-s3c2442/s3c2442.c
+ *
+ * Copyright (c) 2004-2005 Simtec Electronics
+ * http://armlinux.simtec.co.uk/
+ * Ben Dooks <ben@simtec.co.uk>
+ *
+ * S3C2442 core and lock 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/syscore_ops.h>
+#include <linux/interrupt.h>
+#include <linux/ioport.h>
+#include <linux/mutex.h>
+#include <linux/gpio.h>
+#include <linux/clk.h>
+#include <linux/io.h>
+
+#include <mach/hardware.h>
+#include <linux/atomic.h>
+#include <asm/irq.h>
+
+#include <mach/regs-clock.h>
+
+#include <plat/clock.h>
+#include <plat/cpu.h>
+#include <plat/s3c244x.h>
+#include <plat/pm.h>
+
+#include <plat/gpio-core.h>
+#include <plat/gpio-cfg.h>
+#include <plat/gpio-cfg-helpers.h>
+
+/* S3C2442 extended clock support */
+
+static unsigned long s3c2442_camif_upll_round(struct clk *clk,
+ unsigned long rate)
+{
+ unsigned long parent_rate = clk_get_rate(clk->parent);
+ int div;
+
+ if (rate > parent_rate)
+ return parent_rate;
+
+ div = parent_rate / rate;
+
+ if (div == 3)
+ return parent_rate / 3;
+
+ /* note, we remove the +/- 1 calculations for the divisor */
+
+ div /= 2;
+
+ if (div < 1)
+ div = 1;
+ else if (div > 16)
+ div = 16;
+
+ return parent_rate / (div * 2);
+}
+
+static int s3c2442_camif_upll_setrate(struct clk *clk, unsigned long rate)
+{
+ unsigned long parent_rate = clk_get_rate(clk->parent);
+ unsigned long camdivn = __raw_readl(S3C2440_CAMDIVN);
+
+ rate = s3c2442_camif_upll_round(clk, rate);
+
+ camdivn &= ~S3C2442_CAMDIVN_CAMCLK_DIV3;
+
+ if (rate == parent_rate) {
+ camdivn &= ~S3C2440_CAMDIVN_CAMCLK_SEL;
+ } else if ((parent_rate / rate) == 3) {
+ camdivn |= S3C2440_CAMDIVN_CAMCLK_SEL;
+ camdivn |= S3C2442_CAMDIVN_CAMCLK_DIV3;
+ } else {
+ camdivn &= ~S3C2440_CAMDIVN_CAMCLK_MASK;
+ camdivn |= S3C2440_CAMDIVN_CAMCLK_SEL;
+ camdivn |= (((parent_rate / rate) / 2) - 1);
+ }
+
+ __raw_writel(camdivn, S3C2440_CAMDIVN);
+
+ return 0;
+}
+
+/* Extra S3C2442 clocks */
+
+static struct clk s3c2442_clk_cam = {
+ .name = "camif",
+ .id = -1,
+ .enable = s3c2410_clkcon_enable,
+ .ctrlbit = S3C2440_CLKCON_CAMERA,
+};
+
+static struct clk s3c2442_clk_cam_upll = {
+ .name = "camif-upll",
+ .id = -1,
+ .ops = &(struct clk_ops) {
+ .set_rate = s3c2442_camif_upll_setrate,
+ .round_rate = s3c2442_camif_upll_round,
+ },
+};
+
+static int s3c2442_clk_add(struct device *dev, struct subsys_interface *sif)
+{
+ struct clk *clock_upll;
+ struct clk *clock_h;
+ struct clk *clock_p;
+
+ clock_p = clk_get(NULL, "pclk");
+ clock_h = clk_get(NULL, "hclk");
+ clock_upll = clk_get(NULL, "upll");
+
+ if (IS_ERR(clock_p) || IS_ERR(clock_h) || IS_ERR(clock_upll)) {
+ printk(KERN_ERR "S3C2442: Failed to get parent clocks\n");
+ return -EINVAL;
+ }
+
+ s3c2442_clk_cam.parent = clock_h;
+ s3c2442_clk_cam_upll.parent = clock_upll;
+
+ s3c24xx_register_clock(&s3c2442_clk_cam);
+ s3c24xx_register_clock(&s3c2442_clk_cam_upll);
+
+ clk_disable(&s3c2442_clk_cam);
+
+ return 0;
+}
+
+static struct subsys_interface s3c2442_clk_interface = {
+ .name = "s3c2442_clk",
+ .subsys = &s3c2442_subsys,
+ .add_dev = s3c2442_clk_add,
+};
+
+static __init int s3c2442_clk_init(void)
+{
+ return subsys_interface_register(&s3c2442_clk_interface);
+}
+
+arch_initcall(s3c2442_clk_init);
+
+
+static struct device s3c2442_dev = {
+ .bus = &s3c2442_subsys,
+};
+
+int __init s3c2442_init(void)
+{
+ printk("S3C2442: Initialising architecture\n");
+
+#ifdef CONFIG_PM
+ register_syscore_ops(&s3c2410_pm_syscore_ops);
+#endif
+ register_syscore_ops(&s3c244x_pm_syscore_ops);
+ register_syscore_ops(&s3c24xx_irq_syscore_ops);
+
+ return device_register(&s3c2442_dev);
+}
+
+void __init s3c2442_map_io(void)
+{
+ s3c244x_map_io();
+
+ s3c24xx_gpiocfg_default.set_pull = s3c24xx_gpio_setpull_1down;
+ s3c24xx_gpiocfg_default.get_pull = s3c24xx_gpio_getpull_1down;
+}