linux-kernel - [PATCH 05/15] bus: ti-sysc: Ignore timer12 on secure omap3

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Date:   Wed, 29 Apr 2020 14:53:52 -0700
From:   Tony Lindgren <tony@...mide.com>
To:     Daniel Lezcano <daniel.lezcano@...aro.org>,
        Thomas Gleixner <tglx@...utronix.de>
Cc:     linux-kernel@...r.kernel.org, linux-omap@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, Keerthy <j-keerthy@...com>,
        Lokesh Vutla <lokeshvutla@...com>,
        Tero Kristo <t-kristo@...com>,
        "H. Nikolaus Schaller" <hns@...delico.com>,
        Aaro Koskinen <aaro.koskinen@....fi>,
        Adam Ford <aford173@...il.com>,
        Andreas Kemnade <andreas@...nade.info>,
        Brian Hutchinson <b.hutchman@...il.com>,
        Graeme Smecher <gsmecher@...eespeedlogic.com>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>, devicetree@...r.kernel.org,
        linux-clk@...r.kernel.org
Subject: [PATCH 05/15] bus: ti-sysc: Ignore timer12 on secure omap3

Some early omap3 boards use timer12 for system timer, but for secure
SoCs like on n900 it's not accessible. Likely we will be configuring
unavailable devices for other SoCs too based on runtime SoC detection,
so let's use a switch to start with.

Cc: Keerthy <j-keerthy@...com>
Cc: Lokesh Vutla <lokeshvutla@...com>
Cc: Tero Kristo <t-kristo@...com>
Signed-off-by: Tony Lindgren <tony@...mide.com>
---
 drivers/bus/ti-sysc.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/drivers/bus/ti-sysc.c b/drivers/bus/ti-sysc.c
--- a/drivers/bus/ti-sysc.c
+++ b/drivers/bus/ti-sysc.c
@@ -2744,6 +2744,17 @@ static int sysc_init_soc(struct sysc *ddata)
 	if (match && match->data)
 		sysc_soc->soc = (int)match->data;
 
+	/* Ignore devices that are not available on HS and EMU SoCs */
+	if (!sysc_soc->general_purpose) {
+		switch (sysc_soc->soc) {
+		case SOC_3430 ... SOC_3630:
+			sysc_add_disabled(0x48304000);	/* timer12 */
+			break;
+		default:
+			break;
+		};
+	}
+
 	match = soc_device_match(sysc_soc_feat_match);
 	if (!match)
 		return 0;
-- 
2.26.2