#include <linux/platform_device.h>
#include <linux/pm_domain.h>
#include <linux/pm_runtime.h>
+#include <linux/reset.h>
#include <linux/of_address.h>
#include <linux/of_platform.h>
#include <linux/slab.h>
struct clk **clocks;
const char **clock_roles;
int nr_clocks;
+ struct reset_control *rsts;
const char *legacy_mode;
const struct sysc_capabilities *cap;
struct sysc_config cfg;
return 0;
}
+/**
+ * sysc_init_resets - reset module on init
+ * @ddata: device driver data
+ *
+ * A module can have both OCP softreset control and external rstctrl.
+ * If more complicated rstctrl resets are needed, please handle these
+ * directly from the child device driver and map only the module reset
+ * for the parent interconnect target module device.
+ *
+ * Automatic reset of the module on init can be skipped with the
+ * "ti,no-reset-on-init" device tree property.
+ */
+static int sysc_init_resets(struct sysc *ddata)
+{
+ int error;
+
+ ddata->rsts =
+ devm_reset_control_array_get_optional_exclusive(ddata->dev);
+ if (IS_ERR(ddata->rsts))
+ return PTR_ERR(ddata->rsts);
+
+ if (ddata->cfg.quirks & SYSC_QUIRK_NO_RESET_ON_INIT)
+ goto deassert;
+
+ error = reset_control_assert(ddata->rsts);
+ if (error)
+ return error;
+
+deassert:
+ error = reset_control_deassert(ddata->rsts);
+ if (error)
+ return error;
+
+ return 0;
+}
+
/**
* sysc_parse_and_check_child_range - parses module IO region from ranges
* @ddata: device driver data
return 0;
}
+
ddata->revision = sysc_read_revision(ddata);
pm_runtime_put_sync(ddata->dev);
if (error)
goto unprepare;
- pm_runtime_enable(ddata->dev);
+ error = sysc_init_resets(ddata);
+ if (error)
+ return error;
+ pm_runtime_enable(ddata->dev);
error = sysc_init_module(ddata);
if (error)
goto unprepare;
pm_runtime_put(&pdev->dev);
}
+ if (!of_get_available_child_count(ddata->dev->of_node))
+ reset_control_assert(ddata->rsts);
+
return 0;
err:
pm_runtime_put_sync(&pdev->dev);
pm_runtime_disable(&pdev->dev);
+ reset_control_assert(ddata->rsts);
unprepare:
sysc_unprepare(ddata);