ARM: OMAP2+: WDT: move init; add read_reset_sources pdata function pointer

The OMAP watchdog timer driver directly calls a function exported by
code in arch/arm/mach-omap2.  This is not good; it tightly couples
this driver to the mach-omap2 integration code.  Instead, add a
temporary platform_data function pointer to abstract this function
call.  A subsequent patch will convert the watchdog driver to use this
function pointer.

This patch also moves the device creation code out of
arch/arm/mach-omap2/devices.c and into arch/arm/mach-omap2/wd_timer.c.
This is another step towards the removal of
arch/arm/mach-omap2/devices.c.

Cc: Wim Van Sebroeck <wim@iguana.be>
Acked-by: Wim Van Sebroeck <wim@iguana.be>
[paul@pwsan.com: skip wd_timer device creation when DT blob is present]
Signed-off-by: Paul Walmsley <paul@pwsan.com>

1 files changed, 34 insertions, 1 deletions

diff --git a/arch/arm/mach-omap2/wd_timer.c b/arch/arm/mach-omap2/wd_timer.c
index f6b6c37ac3f4..5a8629ff0ab0 100644
--- a/arch/arm/mach-omap2/wd_timer.c
+++ b/arch/arm/mach-omap2/wd_timer.c
@@ -11,10 +11,14 @@
 #include <linux/io.h>
 #include <linux/err.h>
 
-#include "omap_hwmod.h"
+#include <linux/platform_data/omap-wd-timer.h>
 
+#include "omap_hwmod.h"
+#include "omap_device.h"
 #include "wd_timer.h"
 #include "common.h"
+#include "prm.h"
+#include "soc.h"
 
 /*
  * In order to avoid any assumptions from bootloader regarding WDT
@@ -99,3 +103,32 @@ int omap2_wd_timer_reset(struct omap_hwmod *oh)
         return (c == MAX_MODULE_SOFTRESET_WAIT) ? -ETIMEDOUT :
                 omap2_wd_timer_disable(oh);
 }
+
+static int __init omap_init_wdt(void)
+{
+        int id = -1;
+        struct platform_device *pdev;
+        struct omap_hwmod *oh;
+        char *oh_name = "wd_timer2";
+        char *dev_name = "omap_wdt";
+        struct omap_wd_timer_platform_data pdata;
+
+        if (!cpu_class_is_omap2() || of_have_populated_dt())
+                return 0;
+
+        oh = omap_hwmod_lookup(oh_name);
+        if (!oh) {
+                pr_err("Could not look up wd_timer%d hwmod\n", id);
+                return -EINVAL;
+        }
+
+        pdata.read_reset_sources = prm_read_reset_sources;
+
+        pdev = omap_device_build(dev_name, id, oh, &pdata,
+                                 sizeof(struct omap_wd_timer_platform_data),
+                                 NULL, 0, 0);
+        WARN(IS_ERR(pdev), "Can't build omap_device for %s:%s.\n",
+             dev_name, oh->name);
+        return 0;
+}
+subsys_initcall(omap_init_wdt);