From 2928135c93f873b260ba1a88023f0bbe0f67e315 Mon Sep 17 00:00:00 2001
From: Tony Lindgren <tony@atomide.com>
Date: Mon, 16 Nov 2020 12:57:13 +0200
Subject: bus: ti-sysc: Support modules without control registers
Some modules like MPU have a powerdomain and functional clock but not
necessarily any control registers. Let's allow configuring interconnect
target modules with no control registers.
Signed-off-by: Tony Lindgren <tony@atomide.com>
---
drivers/bus/ti-sysc.c | 7 +++++++
1 file changed, 7 insertions(+)
(limited to 'drivers/bus')
diff --git a/drivers/bus/ti-sysc.c b/drivers/bus/ti-sysc.c
index 2b99fd5a4740..88a5d22091f3 100644
--- a/drivers/bus/ti-sysc.c
+++ b/drivers/bus/ti-sysc.c
@@ -853,8 +853,12 @@ static int sysc_ioremap(struct sysc *ddata)
*/
static int sysc_map_and_check_registers(struct sysc *ddata)
{
+ struct device_node *np = ddata->dev->of_node;
int error;
+ if (!of_get_property(np, "reg", NULL))
+ return 0;
+
error = sysc_parse_and_check_child_range(ddata);
if (error)
return error;
@@ -2911,6 +2915,9 @@ static int sysc_probe(struct platform_device *pdev)
if (!ddata)
return -ENOMEM;
+ ddata->offsets[SYSC_REVISION] = -ENODEV;
+ ddata->offsets[SYSC_SYSCONFIG] = -ENODEV;
+ ddata->offsets[SYSC_SYSSTATUS] = -ENODEV;
ddata->dev = &pdev->dev;
platform_set_drvdata(pdev, ddata);
--
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