@@ -8,19 +8,27 @@
#include <linux/platform_device.h>
#include <linux/err.h>
+#include <linux/clk.h>
+#include <linux/list.h>
-#include "omap_hwmod.h"
-#include "omap_device.h"
#include "clockdomain.h"
#include "powerdomain.h"
+struct pwrdm_link {
+ struct device *dev;
+ struct powerdomain *pwrdm;
+ struct list_head node;
+};
+
+static DEFINE_SPINLOCK(iommu_lock);
+static struct clockdomain *emu_clkdm;
+static atomic_t emu_count;
+
static void omap_iommu_dra7_emu_swsup_config(struct platform_device *pdev,
bool enable)
{
- static struct clockdomain *emu_clkdm;
- static DEFINE_SPINLOCK(emu_lock);
- static atomic_t count;
struct device_node *np = pdev->dev.of_node;
+ unsigned long flags;
if (!of_device_is_compatible(np, "ti,dra7-dsp-iommu"))
return;
@@ -31,34 +39,87 @@ static void omap_iommu_dra7_emu_swsup_config(struct platform_device *pdev,
return;
}
- spin_lock(&emu_lock);
+ spin_lock_irqsave(&iommu_lock, flags);
- if (enable && (atomic_inc_return(&count) == 1))
+ if (enable && (atomic_inc_return(&emu_count) == 1))
clkdm_deny_idle(emu_clkdm);
- else if (!enable && (atomic_dec_return(&count) == 0))
+ else if (!enable && (atomic_dec_return(&emu_count) == 0))
clkdm_allow_idle(emu_clkdm);
- spin_unlock(&emu_lock);
+ spin_unlock_irqrestore(&iommu_lock, flags);
+}
+
+static struct powerdomain *_get_pwrdm(struct device *dev)
+{
+ struct clk *clk;
+ struct clk_hw_omap *hwclk;
+ struct clockdomain *clkdm;
+ struct powerdomain *pwrdm = NULL;
+ struct pwrdm_link *entry;
+ unsigned long flags;
+ static LIST_HEAD(cache);
+
+ spin_lock_irqsave(&iommu_lock, flags);
+
+ list_for_each_entry(entry, &cache, node) {
+ if (entry->dev == dev) {
+ pwrdm = entry->pwrdm;
+ break;
+ }
+ }
+
+ spin_unlock_irqrestore(&iommu_lock, flags);
+
+ if (pwrdm)
+ return pwrdm;
+
+ clk = of_clk_get(dev->of_node->parent, 0);
+ if (!clk) {
+ dev_err(dev, "no fck found\n");
+ return NULL;
+ }
+
+ hwclk = to_clk_hw_omap(__clk_get_hw(clk));
+ clk_put(clk);
+ if (!hwclk || !hwclk->clkdm_name) {
+ dev_err(dev, "no hwclk data\n");
+ return NULL;
+ }
+
+ clkdm = clkdm_lookup(hwclk->clkdm_name);
+ if (!clkdm) {
+ dev_err(dev, "clkdm not found: %s\n", hwclk->clkdm_name);
+ return NULL;
+ }
+
+ pwrdm = clkdm_get_pwrdm(clkdm);
+ if (!pwrdm) {
+ dev_err(dev, "pwrdm not found: %s\n", clkdm->name);
+ return NULL;
+ }
+
+ entry = kmalloc(sizeof(*entry), GFP_KERNEL);
+ if (entry) {
+ entry->dev = dev;
+ entry->pwrdm = pwrdm;
+ spin_lock_irqsave(&iommu_lock, flags);
+ list_add(&entry->node, &cache);
+ spin_unlock_irqrestore(&iommu_lock, flags);
+ }
+
+ return pwrdm;
}
int omap_iommu_set_pwrdm_constraint(struct platform_device *pdev, bool request,
u8 *pwrst)
{
struct powerdomain *pwrdm;
- struct omap_device *od;
u8 next_pwrst;
int ret = 0;
- od = to_omap_device(pdev);
- if (!od)
- return -ENODEV;
-
- if (od->hwmods_cnt != 1)
- return -EINVAL;
-
- pwrdm = omap_hwmod_get_pwrdm(od->hwmods[0]);
+ pwrdm = _get_pwrdm(&pdev->dev);
if (!pwrdm)
- return -EINVAL;
+ return -ENODEV;
if (request) {
*pwrst = pwrdm_read_next_pwrst(pwrdm);
Convert omap2 iommu platform code to use ti-sysc instead of legacy omap-device / hwmod interfaces. Signed-off-by: Tero Kristo <t-kristo@ti.com> --- arch/arm/mach-omap2/omap-iommu.c | 99 ++++++++++++++++++++++++++------ 1 file changed, 80 insertions(+), 19 deletions(-) -- 2.17.1 -- Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki. Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki