linux-kernel - [PATCH 5.4 37/52] bus: ti-sysc: Use CLKDM_NOAUTO for dra7 dcan1 for errata i893

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Message-Id: <20211011134505.002056141@linuxfoundation.org>
Date:   Mon, 11 Oct 2021 15:46:06 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Tony Lindgren <tony@...mide.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.4 37/52] bus: ti-sysc: Use CLKDM_NOAUTO for dra7 dcan1 for errata i893

From: Tony Lindgren <tony@...mide.com>

[ Upstream commit b13a270ace2e4c70653aa1d1d0394c553905802f ]

Commit 94f6345712b3 ("bus: ti-sysc: Implement quirk handling for
CLKDM_NOAUTO") should have also added the quirk for dra7 dcan1 in
addition to dcan2 for errata i893 handling.

Let's also pass the quirk flag for legacy mode booting for if "ti,hwmods"
dts property is used with related dcan hwmod data. This should be only
needed if anybody needs to git bisect earlier stable trees though.

Fixes: 94f6345712b3 ("bus: ti-sysc: Implement quirk handling for CLKDM_NOAUTO")
Signed-off-by: Tony Lindgren <tony@...mide.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 arch/arm/mach-omap2/omap_hwmod.c | 2 ++
 drivers/bus/ti-sysc.c            | 3 +++
 2 files changed, 5 insertions(+)

diff --git a/arch/arm/mach-omap2/omap_hwmod.c b/arch/arm/mach-omap2/omap_hwmod.c
index eb74aa182661..6289b288d60a 100644
--- a/arch/arm/mach-omap2/omap_hwmod.c
+++ b/arch/arm/mach-omap2/omap_hwmod.c
@@ -3656,6 +3656,8 @@ int omap_hwmod_init_module(struct device *dev,
 		oh->flags |= HWMOD_SWSUP_SIDLE_ACT;
 	if (data->cfg->quirks & SYSC_QUIRK_SWSUP_MSTANDBY)
 		oh->flags |= HWMOD_SWSUP_MSTANDBY;
+	if (data->cfg->quirks & SYSC_QUIRK_CLKDM_NOAUTO)
+		oh->flags |= HWMOD_CLKDM_NOAUTO;
 
 	error = omap_hwmod_check_module(dev, oh, data, sysc_fields,
 					rev_offs, sysc_offs, syss_offs,
diff --git a/drivers/bus/ti-sysc.c b/drivers/bus/ti-sysc.c
index 90053c4a8290..469ca73de4ce 100644
--- a/drivers/bus/ti-sysc.c
+++ b/drivers/bus/ti-sysc.c
@@ -1388,6 +1388,9 @@ static const struct sysc_revision_quirk sysc_revision_quirks[] = {
 	/* Quirks that need to be set based on detected module */
 	SYSC_QUIRK("aess", 0, 0, 0x10, -ENODEV, 0x40000000, 0xffffffff,
 		   SYSC_MODULE_QUIRK_AESS),
+	/* Errata i893 handling for dra7 dcan1 and 2 */
+	SYSC_QUIRK("dcan", 0x4ae3c000, 0x20, -ENODEV, -ENODEV, 0xa3170504, 0xffffffff,
+		   SYSC_QUIRK_CLKDM_NOAUTO),
 	SYSC_QUIRK("dcan", 0x48480000, 0x20, -ENODEV, -ENODEV, 0xa3170504, 0xffffffff,
 		   SYSC_QUIRK_CLKDM_NOAUTO),
 	SYSC_QUIRK("dss", 0x4832a000, 0, 0x10, 0x14, 0x00000020, 0xffffffff,
-- 
2.33.0