linux-kernel - [PATCH v2 2/2] clk: ingenic-tcu: Fix missing TCU clock for X1000 SoC

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Date:   Sat, 12 Feb 2022 15:09:28 +0000
From:   Aidan MacDonald <aidanmacdonald.0x0@...il.com>
To:     paul@...pouillou.net, robh+dt@...nel.org, mturquette@...libre.com,
        sboyd@...nel.org
Cc:     linux-mips@...r.kernel.org, devicetree@...r.kernel.org,
        linux-clk@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2 2/2] clk: ingenic-tcu: Fix missing TCU clock for X1000 SoC

The X1000 does have a TCU clock gate, so pass it to the driver.
Without this the TCU can be gated automatically, which prevents
timers from running.

Fixes: dc6a81c3382f74fe ("clk: Ingenic: Add support for TCU of X1000.")
Signed-off-by: Aidan MacDonald <aidanmacdonald.0x0@...il.com>
---
I've just realized, maybe this is an ABI break. Now that the TCU clock is
required, the driver probe will fail if given an old device tree which is
missing that clock. Is it necessary to add a hack of some sort to support
the old device tree?

 drivers/clk/ingenic/tcu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/clk/ingenic/tcu.c b/drivers/clk/ingenic/tcu.c
index 77acfbeb4830..9c86043f673a 100644
--- a/drivers/clk/ingenic/tcu.c
+++ b/drivers/clk/ingenic/tcu.c
@@ -320,7 +320,7 @@ static const struct ingenic_soc_info jz4770_soc_info = {
 static const struct ingenic_soc_info x1000_soc_info = {
 	.num_channels = 8,
 	.has_ost = false, /* X1000 has OST, but it not belong TCU */
-	.has_tcu_clk = false,
+	.has_tcu_clk = true,
 };
 
 static const struct of_device_id __maybe_unused ingenic_tcu_of_match[] __initconst = {
-- 
2.34.1