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Diffstat (limited to 'arch/arm/plat-omap/omap_device.c')
-rw-r--r--arch/arm/plat-omap/omap_device.c110
1 files changed, 68 insertions, 42 deletions
diff --git a/arch/arm/plat-omap/omap_device.c b/arch/arm/plat-omap/omap_device.c
index d2b160942ccc..abe933cd8f09 100644
--- a/arch/arm/plat-omap/omap_device.c
+++ b/arch/arm/plat-omap/omap_device.c
@@ -82,6 +82,7 @@
#include <linux/slab.h>
#include <linux/err.h>
#include <linux/io.h>
+#include <linux/clk.h>
#include <plat/omap_device.h>
#include <plat/omap_hwmod.h>
@@ -90,12 +91,6 @@
#define USE_WAKEUP_LAT 0
#define IGNORE_WAKEUP_LAT 1
-/*
- * OMAP_DEVICE_MAGIC: used to determine whether a struct omap_device
- * obtained via container_of() is in fact a struct omap_device
- */
-#define OMAP_DEVICE_MAGIC 0xf00dcafe
-
/* Private functions */
/**
@@ -243,6 +238,44 @@ static inline struct omap_device *_find_by_pdev(struct platform_device *pdev)
return container_of(pdev, struct omap_device, pdev);
}
+/**
+ * _add_optional_clock_alias - Add clock alias for hwmod optional clocks
+ * @od: struct omap_device *od
+ *
+ * For every optional clock present per hwmod per omap_device, this function
+ * adds an entry in the clocks list of the form <dev-id=dev_name, con-id=role>
+ * if an entry is already present in it with the form <dev-id=NULL, con-id=role>
+ *
+ * The function is called from inside omap_device_build_ss(), after
+ * omap_device_register.
+ *
+ * This allows drivers to get a pointer to its optional clocks based on its role
+ * by calling clk_get(<dev*>, <role>).
+ *
+ * No return value.
+ */
+static void _add_optional_clock_alias(struct omap_device *od,
+ struct omap_hwmod *oh)
+{
+ int i;
+
+ for (i = 0; i < oh->opt_clks_cnt; i++) {
+ struct omap_hwmod_opt_clk *oc;
+ int r;
+
+ oc = &oh->opt_clks[i];
+
+ if (!oc->_clk)
+ continue;
+
+ r = clk_add_alias(oc->role, dev_name(&od->pdev.dev),
+ (char *)oc->clk, &od->pdev.dev);
+ if (r)
+ pr_err("omap_device: %s: clk_add_alias for %s failed\n",
+ dev_name(&od->pdev.dev), oc->role);
+ }
+}
+
/* Public functions for use by core code */
@@ -257,12 +290,11 @@ static inline struct omap_device *_find_by_pdev(struct platform_device *pdev)
*/
int omap_device_count_resources(struct omap_device *od)
{
- struct omap_hwmod *oh;
int c = 0;
int i;
- for (i = 0, oh = *od->hwmods; i < od->hwmods_cnt; i++, oh++)
- c += omap_hwmod_count_resources(oh);
+ for (i = 0; i < od->hwmods_cnt; i++)
+ c += omap_hwmod_count_resources(od->hwmods[i]);
pr_debug("omap_device: %s: counted %d total resources across %d "
"hwmods\n", od->pdev.name, c, od->hwmods_cnt);
@@ -289,12 +321,11 @@ int omap_device_count_resources(struct omap_device *od)
*/
int omap_device_fill_resources(struct omap_device *od, struct resource *res)
{
- struct omap_hwmod *oh;
int c = 0;
int i, r;
- for (i = 0, oh = *od->hwmods; i < od->hwmods_cnt; i++, oh++) {
- r = omap_hwmod_fill_resources(oh, res);
+ for (i = 0; i < od->hwmods_cnt; i++) {
+ r = omap_hwmod_fill_resources(od->hwmods[i], res);
res += r;
c += r;
}
@@ -414,15 +445,15 @@ struct omap_device *omap_device_build_ss(const char *pdev_name, int pdev_id,
od->pm_lats = pm_lats;
od->pm_lats_cnt = pm_lats_cnt;
- od->magic = OMAP_DEVICE_MAGIC;
-
if (is_early_device)
ret = omap_early_device_register(od);
else
ret = omap_device_register(od);
- for (i = 0; i < oh_cnt; i++)
+ for (i = 0; i < oh_cnt; i++) {
hwmods[i]->od = od;
+ _add_optional_clock_alias(od, hwmods[i]);
+ }
if (ret)
goto odbs_exit4;
@@ -473,6 +504,7 @@ int omap_device_register(struct omap_device *od)
{
pr_debug("omap_device: %s: registering\n", od->pdev.name);
+ od->pdev.dev.parent = &omap_device_parent;
return platform_device_register(&od->pdev);
}
@@ -566,7 +598,6 @@ int omap_device_shutdown(struct platform_device *pdev)
{
int ret, i;
struct omap_device *od;
- struct omap_hwmod *oh;
od = _find_by_pdev(pdev);
@@ -579,8 +610,8 @@ int omap_device_shutdown(struct platform_device *pdev)
ret = _omap_device_deactivate(od, IGNORE_WAKEUP_LAT);
- for (i = 0, oh = *od->hwmods; i < od->hwmods_cnt; i++, oh++)
- omap_hwmod_shutdown(oh);
+ for (i = 0; i < od->hwmods_cnt; i++)
+ omap_hwmod_shutdown(od->hwmods[i]);
od->_state = OMAP_DEVICE_STATE_SHUTDOWN;
@@ -627,18 +658,6 @@ int omap_device_align_pm_lat(struct platform_device *pdev,
}
/**
- * omap_device_is_valid - Check if pointer is a valid omap_device
- * @od: struct omap_device *
- *
- * Return whether struct omap_device pointer @od points to a valid
- * omap_device.
- */
-bool omap_device_is_valid(struct omap_device *od)
-{
- return (od && od->magic == OMAP_DEVICE_MAGIC);
-}
-
-/**
* omap_device_get_pwrdm - return the powerdomain * associated with @od
* @od: struct omap_device *
*
@@ -692,11 +711,10 @@ void __iomem *omap_device_get_rt_va(struct omap_device *od)
*/
int omap_device_enable_hwmods(struct omap_device *od)
{
- struct omap_hwmod *oh;
int i;
- for (i = 0, oh = *od->hwmods; i < od->hwmods_cnt; i++, oh++)
- omap_hwmod_enable(oh);
+ for (i = 0; i < od->hwmods_cnt; i++)
+ omap_hwmod_enable(od->hwmods[i]);
/* XXX pass along return value here? */
return 0;
@@ -710,11 +728,10 @@ int omap_device_enable_hwmods(struct omap_device *od)
*/
int omap_device_idle_hwmods(struct omap_device *od)
{
- struct omap_hwmod *oh;
int i;
- for (i = 0, oh = *od->hwmods; i < od->hwmods_cnt; i++, oh++)
- omap_hwmod_idle(oh);
+ for (i = 0; i < od->hwmods_cnt; i++)
+ omap_hwmod_idle(od->hwmods[i]);
/* XXX pass along return value here? */
return 0;
@@ -729,11 +746,10 @@ int omap_device_idle_hwmods(struct omap_device *od)
*/
int omap_device_disable_clocks(struct omap_device *od)
{
- struct omap_hwmod *oh;
int i;
- for (i = 0, oh = *od->hwmods; i < od->hwmods_cnt; i++, oh++)
- omap_hwmod_disable_clocks(oh);
+ for (i = 0; i < od->hwmods_cnt; i++)
+ omap_hwmod_disable_clocks(od->hwmods[i]);
/* XXX pass along return value here? */
return 0;
@@ -748,12 +764,22 @@ int omap_device_disable_clocks(struct omap_device *od)
*/
int omap_device_enable_clocks(struct omap_device *od)
{
- struct omap_hwmod *oh;
int i;
- for (i = 0, oh = *od->hwmods; i < od->hwmods_cnt; i++, oh++)
- omap_hwmod_enable_clocks(oh);
+ for (i = 0; i < od->hwmods_cnt; i++)
+ omap_hwmod_enable_clocks(od->hwmods[i]);
/* XXX pass along return value here? */
return 0;
}
+
+struct device omap_device_parent = {
+ .init_name = "omap",
+ .parent = &platform_bus,
+};
+
+static int __init omap_device_init(void)
+{
+ return device_register(&omap_device_parent);
+}
+core_initcall(omap_device_init);