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Diffstat (limited to 'arch/arm/mach-omap2/omap_hwmod.c')
-rw-r--r--arch/arm/mach-omap2/omap_hwmod.c97
1 files changed, 80 insertions, 17 deletions
diff --git a/arch/arm/mach-omap2/omap_hwmod.c b/arch/arm/mach-omap2/omap_hwmod.c
index 4653efb87a2..d25a95fe992 100644
--- a/arch/arm/mach-omap2/omap_hwmod.c
+++ b/arch/arm/mach-omap2/omap_hwmod.c
@@ -138,6 +138,11 @@
#include <linux/spinlock.h>
#include <linux/slab.h>
#include <linux/bootmem.h>
+#include <linux/cpu.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+
+#include <asm/system_misc.h>
#include "clock.h"
#include "omap_hwmod.h"
@@ -608,8 +613,6 @@ static int _enable_wakeup(struct omap_hwmod *oh, u32 *v)
/* XXX test pwrdm_get_wken for this hwmod's subsystem */
- oh->_int_flags |= _HWMOD_WAKEUP_ENABLED;
-
return 0;
}
@@ -643,8 +646,6 @@ static int _disable_wakeup(struct omap_hwmod *oh, u32 *v)
/* XXX test pwrdm_get_wken for this hwmod's subsystem */
- oh->_int_flags &= ~_HWMOD_WAKEUP_ENABLED;
-
return 0;
}
@@ -1366,7 +1367,9 @@ static void _enable_sysc(struct omap_hwmod *oh)
}
if (sf & SYSC_HAS_MIDLEMODE) {
- if (oh->flags & HWMOD_SWSUP_MSTANDBY) {
+ if (oh->flags & HWMOD_FORCE_MSTANDBY) {
+ idlemode = HWMOD_IDLEMODE_FORCE;
+ } else if (oh->flags & HWMOD_SWSUP_MSTANDBY) {
idlemode = HWMOD_IDLEMODE_NO;
} else {
if (sf & SYSC_HAS_ENAWAKEUP)
@@ -1438,7 +1441,8 @@ static void _idle_sysc(struct omap_hwmod *oh)
}
if (sf & SYSC_HAS_MIDLEMODE) {
- if (oh->flags & HWMOD_SWSUP_MSTANDBY) {
+ if ((oh->flags & HWMOD_SWSUP_MSTANDBY) ||
+ (oh->flags & HWMOD_FORCE_MSTANDBY)) {
idlemode = HWMOD_IDLEMODE_FORCE;
} else {
if (sf & SYSC_HAS_ENAWAKEUP)
@@ -1661,7 +1665,7 @@ static int _deassert_hardreset(struct omap_hwmod *oh, const char *name)
return -ENOSYS;
ret = _lookup_hardreset(oh, name, &ohri);
- if (IS_ERR_VALUE(ret))
+ if (ret < 0)
return ret;
if (oh->clkdm) {
@@ -2053,6 +2057,23 @@ static int _omap4_get_context_lost(struct omap_hwmod *oh)
}
/**
+ * _enable_preprogram - Pre-program an IP block during the _enable() process
+ * @oh: struct omap_hwmod *
+ *
+ * Some IP blocks (such as AESS) require some additional programming
+ * after enable before they can enter idle. If a function pointer to
+ * do so is present in the hwmod data, then call it and pass along the
+ * return value; otherwise, return 0.
+ */
+static int __init _enable_preprogram(struct omap_hwmod *oh)
+{
+ if (!oh->class->enable_preprogram)
+ return 0;
+
+ return oh->class->enable_preprogram(oh);
+}
+
+/**
* _enable - enable an omap_hwmod
* @oh: struct omap_hwmod *
*
@@ -2134,6 +2155,8 @@ static int _enable(struct omap_hwmod *oh)
_enable_clocks(oh);
if (soc_ops.enable_module)
soc_ops.enable_module(oh);
+ if (oh->flags & HWMOD_BLOCK_WFI)
+ cpu_idle_poll_ctrl(true);
if (soc_ops.update_context_lost)
soc_ops.update_context_lost(oh);
@@ -2156,6 +2179,7 @@ static int _enable(struct omap_hwmod *oh)
_update_sysc_cache(oh);
_enable_sysc(oh);
}
+ r = _enable_preprogram(oh);
} else {
if (soc_ops.disable_module)
soc_ops.disable_module(oh);
@@ -2195,6 +2219,8 @@ static int _idle(struct omap_hwmod *oh)
_idle_sysc(oh);
_del_initiator_dep(oh, mpu_oh);
+ if (oh->flags & HWMOD_BLOCK_WFI)
+ cpu_idle_poll_ctrl(false);
if (soc_ops.disable_module)
soc_ops.disable_module(oh);
@@ -2303,6 +2329,8 @@ static int _shutdown(struct omap_hwmod *oh)
if (oh->_state == _HWMOD_STATE_ENABLED) {
_del_initiator_dep(oh, mpu_oh);
/* XXX what about the other system initiators here? dma, dsp */
+ if (oh->flags & HWMOD_BLOCK_WFI)
+ cpu_idle_poll_ctrl(false);
if (soc_ops.disable_module)
soc_ops.disable_module(oh);
_disable_clocks(oh);
@@ -2324,6 +2352,34 @@ static int _shutdown(struct omap_hwmod *oh)
}
/**
+ * of_dev_hwmod_lookup - look up needed hwmod from dt blob
+ * @np: struct device_node *
+ * @oh: struct omap_hwmod *
+ *
+ * Parse the dt blob and find out needed hwmod. Recursive function is
+ * implemented to take care hierarchical dt blob parsing.
+ * Return: The device node on success or NULL on failure.
+ */
+static struct device_node *of_dev_hwmod_lookup(struct device_node *np,
+ struct omap_hwmod *oh)
+{
+ struct device_node *np0 = NULL, *np1 = NULL;
+ const char *p;
+
+ for_each_child_of_node(np, np0) {
+ if (of_find_property(np0, "ti,hwmods", NULL)) {
+ p = of_get_property(np0, "ti,hwmods", NULL);
+ if (!strcmp(p, oh->name))
+ return np0;
+ np1 = of_dev_hwmod_lookup(np0, oh);
+ if (np1)
+ return np1;
+ }
+ }
+ return NULL;
+}
+
+/**
* _init_mpu_rt_base - populate the virtual address for a hwmod
* @oh: struct omap_hwmod * to locate the virtual address
*
@@ -2335,7 +2391,8 @@ static int _shutdown(struct omap_hwmod *oh)
static void __init _init_mpu_rt_base(struct omap_hwmod *oh, void *data)
{
struct omap_hwmod_addr_space *mem;
- void __iomem *va_start;
+ void __iomem *va_start = NULL;
+ struct device_node *np;
if (!oh)
return;
@@ -2349,10 +2406,18 @@ static void __init _init_mpu_rt_base(struct omap_hwmod *oh, void *data)
if (!mem) {
pr_debug("omap_hwmod: %s: no MPU register target found\n",
oh->name);
- return;
+
+ /* Extract the IO space from device tree blob */
+ if (!of_have_populated_dt())
+ return;
+
+ np = of_dev_hwmod_lookup(of_find_node_by_name(NULL, "ocp"), oh);
+ if (np)
+ va_start = of_iomap(np, 0);
+ } else {
+ va_start = ioremap(mem->pa_start, mem->pa_end - mem->pa_start);
}
- va_start = ioremap(mem->pa_start, mem->pa_end - mem->pa_start);
if (!va_start) {
pr_err("omap_hwmod: %s: Could not ioremap\n", oh->name);
return;
@@ -2384,10 +2449,11 @@ static int __init _init(struct omap_hwmod *oh, void *data)
if (oh->_state != _HWMOD_STATE_REGISTERED)
return 0;
- _init_mpu_rt_base(oh, NULL);
+ if (oh->class->sysc)
+ _init_mpu_rt_base(oh, NULL);
r = _init_clocks(oh, NULL);
- if (IS_ERR_VALUE(r)) {
+ if (r < 0) {
WARN(1, "omap_hwmod: %s: couldn't init clocks\n", oh->name);
return -EINVAL;
}
@@ -3041,11 +3107,8 @@ static int _am33xx_assert_hardreset(struct omap_hwmod *oh,
static int _am33xx_deassert_hardreset(struct omap_hwmod *oh,
struct omap_hwmod_rst_info *ohri)
{
- if (ohri->st_shift)
- pr_err("omap_hwmod: %s: %s: hwmod data error: OMAP4 does not support st_shift\n",
- oh->name, ohri->name);
-
return am33xx_prm_deassert_hardreset(ohri->rst_shift,
+ ohri->st_shift,
oh->clkdm->pwrdm.ptr->prcm_offs,
oh->prcm.omap4.rstctrl_offs,
oh->prcm.omap4.rstst_offs);
@@ -3303,7 +3366,7 @@ static int __init omap_hwmod_setup_all(void)
return 0;
}
-core_initcall(omap_hwmod_setup_all);
+omap_core_initcall(omap_hwmod_setup_all);
/**
* omap_hwmod_enable - enable an omap_hwmod
generated by cgit v1.2.3-70-g09d2 (git 2.51.2) at 2025-11-05 10:07:40 +0000