config HWSPINLOCK_OMAP
tristate "OMAP Hardware Spinlock device"
- depends on ARCH_OMAP4 || SOC_OMAP5
+ depends on ARCH_OMAP4 || SOC_OMAP5 || SOC_DRA7XX || SOC_AM33XX || SOC_AM43XX
select HWSPINLOCK
help
Say y here to support the OMAP Hardware Spinlock device (firstly
if (!io_base)
return -ENOMEM;
+ /*
+ * make sure the module is enabled and clocked before reading
+ * the module SYSSTATUS register
+ */
+ pm_runtime_enable(&pdev->dev);
+ ret = pm_runtime_get_sync(&pdev->dev);
+ if (ret < 0) {
+ pm_runtime_put_noidle(&pdev->dev);
+ goto iounmap_base;
+ }
+
/* Determine number of locks */
i = readl(io_base + SYSSTATUS_OFFSET);
i >>= SPINLOCK_NUMLOCKS_BIT_OFFSET;
+ /*
+ * runtime PM will make sure the clock of this module is
+ * enabled again iff at least one lock is requested
+ */
+ ret = pm_runtime_put(&pdev->dev);
+ if (ret < 0)
+ goto iounmap_base;
+
/* one of the four lsb's must be set, and nothing else */
if (hweight_long(i & 0xf) != 1 || i > 8) {
ret = -EINVAL;
for (i = 0, hwlock = &bank->lock[0]; i < num_locks; i++, hwlock++)
hwlock->priv = io_base + LOCK_BASE_OFFSET + sizeof(u32) * i;
- /*
- * runtime PM will make sure the clock of this module is
- * enabled iff at least one lock is requested
- */
- pm_runtime_enable(&pdev->dev);
-
ret = hwspin_lock_register(bank, &pdev->dev, &omap_hwspinlock_ops,
pdata->base_id, num_locks);
if (ret)
return 0;
reg_fail:
- pm_runtime_disable(&pdev->dev);
kfree(bank);
iounmap_base:
+ pm_runtime_disable(&pdev->dev);
iounmap(io_base);
return ret;
}