This patch converts OMAP1 dual mode timers into platform devices
and adds support for registering them through generic linux
platform device layer.
Signed-off-by: Thara Gopinath <thara@xxxxxx>
---
arch/arm/mach-omap1/Makefile | 1 +
arch/arm/mach-omap1/dmtimers.c | 148 ++++++++++++++++++++++++++++++++++++++++
arch/arm/mach-omap1/timer32k.c | 3 -
3 files changed, 149 insertions(+), 3 deletions(-)
create mode 100644 arch/arm/mach-omap1/dmtimers.c
diff --git a/arch/arm/mach-omap1/Makefile b/arch/arm/mach-omap1/Makefile
index b6a537c..9abc6b7 100644
--- a/arch/arm/mach-omap1/Makefile
+++ b/arch/arm/mach-omap1/Makefile
@@ -10,6 +10,7 @@ obj-$(CONFIG_OMAP_MCBSP) += mcbsp.o
obj-$(CONFIG_OMAP_MPU_TIMER) += time.o
obj-$(CONFIG_OMAP_32K_TIMER) += timer32k.o
+obj-$(CONFIG_OMAP_DM_TIMER) += dmtimers.o
# Power Management
obj-$(CONFIG_PM) += pm.o sleep.o
diff --git a/arch/arm/mach-omap1/dmtimers.c b/arch/arm/mach-omap1/dmtimers.c
new file mode 100644
index 0000000..4034fb7
--- /dev/null
+++ b/arch/arm/mach-omap1/dmtimers.c
@@ -0,0 +1,148 @@
+/**
+ * OMAP1 Dual-Mode Timers
+ *
+ * Copyright (C) 2010 Texas Instruments, Inc.
+ * Thara Gopinath <thara@xxxxxx>
+ *
+ * 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/io.h>
+#include <linux/err.h>
+#include <linux/slab.h>
+
+#include <mach/irqs.h>
+#include <plat/dmtimer.h>
+
+#define OMAP1610_GPTIMER1_BASE 0xfffb1400
+#define OMAP1610_GPTIMER2_BASE 0xfffb1c00
+#define OMAP1610_GPTIMER3_BASE 0xfffb2400
+#define OMAP1610_GPTIMER4_BASE 0xfffb2c00
+#define OMAP1610_GPTIMER5_BASE 0xfffb3400
+#define OMAP1610_GPTIMER6_BASE 0xfffb3c00
+#define OMAP1610_GPTIMER7_BASE 0xfffb7400
+#define OMAP1610_GPTIMER8_BASE 0xfffbd400
+
+#define OMAP1_DM_TIMER_COUNT 8
+
+static int omap1_dm_timer_set_clk(struct platform_device *pdev, int source)
+{
+ int n = (pdev->id) << 1;
+ u32 l;
+
+ l = omap_readl(MOD_CONF_CTRL_1) & ~(0x03 << n);
+ l |= source << n;
+ omap_writel(l, MOD_CONF_CTRL_1);
+
+ return 0;
+}
+
+int __init omap1_dm_timer_init(void)
+{
+ int i = 0;
+
+ if (!cpu_is_omap16xx())
+ return 0;
+
+ omap_dm_timer_count = OMAP1_DM_TIMER_COUNT;
+
+ for (i = 0; i < omap_dm_timer_count; i++) {
+ struct platform_device *pdev;
+ struct omap_dm_timer_plat_info *pdata;
+ struct resource res[2];
+ u32 base, irq;
+ int ret;
+
+ switch (i) {
+ case 0:
+ base = OMAP1610_GPTIMER1_BASE;
+ irq = INT_1610_GPTIMER1;
+ break;
+ case 1:
+ base = OMAP1610_GPTIMER2_BASE;
+ irq = INT_1610_GPTIMER2;
+ break;
+ case 2:
+ base = OMAP1610_GPTIMER3_BASE;
+ irq = INT_1610_GPTIMER3;
+ break;
+ case 3:
+ base = OMAP1610_GPTIMER4_BASE;
+ irq = INT_1610_GPTIMER4;
+ break;
+ case 4:
+ base = OMAP1610_GPTIMER5_BASE;
+ irq = INT_1610_GPTIMER5;
+ break;
+ case 5:
+ base = OMAP1610_GPTIMER6_BASE;
+ irq = INT_1610_GPTIMER6;
+ break;
+ case 6:
+ base = OMAP1610_GPTIMER7_BASE;
+ irq = INT_1610_GPTIMER7;
+ break;
+ case 7:
+ base = OMAP1610_GPTIMER8_BASE;
+ irq = INT_1610_GPTIMER8;
+ break;
+ default:
+ /* Should never reach here */
+ return -EINVAL;
+ }
+
+ pdev = platform_device_alloc("dmtimer", i);
+ if (!pdev) {
+ pr_err("%s: Unable to device alloc for dmtimer%d\n",
+ __func__, i);
+ return -ENOMEM;
+ }
+
+ memset(res, 0, 2 * sizeof(struct resource));
+ res[0].start = base;
+ res[0].end = base + 0xff;
+ res[0].flags = IORESOURCE_MEM;
+ res[1].start = res[1].end = irq;
+ res[1].flags = IORESOURCE_IRQ;
+ ret = platform_device_add_resources(pdev, res, ARRAY_SIZE(res));
+ if (ret) {
+ pr_err("%s: Unable to add resources for %s%d\n",
+ __func__, pdev->name, pdev->id);
+ goto exit_device_put;
+ }
+
+ pdata = kzalloc(sizeof(struct omap_dm_timer_plat_info),
+ GFP_KERNEL);
+ if (!pdata) {
+ pr_err("%s: Unable to allocate pdata for %s%d\n",
+ __func__, pdev->name, pdev->id);
+ ret = -ENOMEM;
+ goto exit_device_put;
+ }
+
+ pdata->omap_dm_set_source_clk = omap1_dm_timer_set_clk;
+ ret = platform_device_add_data(pdev, pdata, sizeof(*pdata));
+ if (ret) {
+ pr_err("%s: Unable to add platform data for %s%d\n",
+ __func__, pdev->name, pdev->id);
+ goto exit_release_pdata;
+ }
+ ret = platform_device_add(pdev);
+ if (ret) {
+ pr_err("%s: Unable to add platform device for %s%d\n",
+ __func__, pdev->name, pdev->id);
+ goto exit_release_pdata;
+ }
+ continue;
+exit_release_pdata:
+ kfree(pdata);
+exit_device_put:
+ platform_device_put(pdev);
+ return ret;
+ }
+ return 0;
+}
+arch_initcall(omap1_dm_timer_init);
diff --git a/arch/arm/mach-omap1/timer32k.c b/arch/arm/mach-omap1/timer32k.c
index 20cfbcc..6b8ab9b 100644
--- a/arch/arm/mach-omap1/timer32k.c
+++ b/arch/arm/mach-omap1/timer32k.c
@@ -183,9 +183,6 @@ static __init void omap_init_32k_timer(void)
*/
static void __init omap_timer_init(void)
{
-#ifdef CONFIG_OMAP_DM_TIMER
- omap_dm_timer_init();
-#endif
omap_init_32k_timer();
}
--
1.7.0.rc1.33.g07cf0f
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