diff mbox series

[3/3] bus: ti-sysc: allow reset sharing across devices

Message ID 1565181965-21039-4-git-send-email-t-kristo@ti.com (mailing list archive)
State New, archived
Headers show
Series bus: ti-sysc: fixes for reset handling | expand

Commit Message

Tero Kristo Aug. 7, 2019, 12:46 p.m. UTC 
Some devices need to share their reset signals, like DSP MMUs, thus drop
the exclusive notation from reset request. Also, balance the init time
reset count, otherwise the resets will never be applied post boot.

Signed-off-by: Tero Kristo <t-kristo@ti.com>
---
 drivers/bus/ti-sysc.c | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)
diff mbox series

Patch

diff --git a/drivers/bus/ti-sysc.c b/drivers/bus/ti-sysc.c
index e08125a..b30eb05 100644
--- a/drivers/bus/ti-sysc.c
+++ b/drivers/bus/ti-sysc.c
@@ -502,7 +502,7 @@  static void sysc_clkdm_allow_idle(struct sysc *ddata)
 static int sysc_init_resets(struct sysc *ddata)
 {
 	ddata->rsts =
-		devm_reset_control_get_optional(ddata->dev, "rstctrl");
+		devm_reset_control_get_optional_shared(ddata->dev, "rstctrl");
 	if (IS_ERR(ddata->rsts))
 		return PTR_ERR(ddata->rsts);
 
@@ -1527,7 +1527,7 @@  static int sysc_legacy_init(struct sysc *ddata)
  */
 static int sysc_rstctrl_reset_deassert(struct sysc *ddata, bool reset)
 {
-	int error, val;
+	int error;
 
 	if (!ddata->rsts)
 		return 0;
@@ -1538,7 +1538,9 @@  static int sysc_rstctrl_reset_deassert(struct sysc *ddata, bool reset)
 			return error;
 	}
 
-	return reset_control_deassert(ddata->rsts);
+	reset_control_deassert(ddata->rsts);
+
+	return 0;
 }
 
 /*
@@ -2418,6 +2420,10 @@  static int sysc_probe(struct platform_device *pdev)
 		goto unprepare;
 	}
 
+	/* Balance reset counts */
+	if (ddata->rsts)
+		reset_control_assert(ddata->rsts);
+
 	sysc_show_registers(ddata);
 
 	ddata->dev->type = &sysc_device_type;