bus: ti-sysc: Move rstctrl reset to happen later

We can do the rsstctrl a bit later, but need to deassert rstctrl reset
before the clocks are enabled if asserted. Let's only init restctrl
in sysc_init_resets() and do the reset later on just before we enable
the device clocks.

Signed-off-by: Tony Lindgren <tony@atomide.com>

diff --git a/drivers/bus/ti-sysc.c b/drivers/bus/ti-sysc.c
index d4aae997b78112b6cf8af70cf4d0693966e07059..8bf153d821381101afe5d18f510538c541e13a00 100644 (file)
--- a/drivers/bus/ti-sysc.c
+++ b/drivers/bus/ti-sysc.c
@@ -339,38 +339,18 @@ static void sysc_disable_opt_clocks(struct sysc *ddata)
 }
 
 /**
- * sysc_init_resets - reset module on init
+ * sysc_init_resets - init rstctrl reset line if configured
  * @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.
+ * See sysc_rstctrl_reset_deassert().
  */
 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;
 }
 
@@ -1031,6 +1011,35 @@ static int sysc_legacy_init(struct sysc *ddata)
        return error;
 }
 
+/**
+ * sysc_rstctrl_reset_deassert - deassert rstctrl reset
+ * @ddata: device driver data
+ * @reset: reset before deassert
+ *
+ * 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_rstctrl_reset_deassert(struct sysc *ddata, bool reset)
+{
+       int error;
+
+       if (!ddata->rsts)
+               return 0;
+
+       if (reset) {
+               error = reset_control_assert(ddata->rsts);
+               if (error)
+                       return error;
+       }
+
+       return reset_control_deassert(ddata->rsts);
+}
+
 static int sysc_reset(struct sysc *ddata)
 {
        int offset = ddata->offsets[SYSC_SYSCONFIG];
@@ -1071,6 +1080,14 @@ static int sysc_init_module(struct sysc *ddata)
 {
        int error = 0;
        bool manage_clocks = true;
+       bool reset = true;
+
+       if (ddata->cfg.quirks & SYSC_QUIRK_NO_RESET_ON_INIT)
+               reset = false;
+
+       error = sysc_rstctrl_reset_deassert(ddata, reset);
+       if (error)
+               return error;
 
        if (ddata->cfg.quirks &
            (SYSC_QUIRK_NO_IDLE | SYSC_QUIRK_NO_IDLE_ON_INIT))