[PATCH v2 2/4] clk: rs9: Limit check to vendor ID in VID register

[Marek Vasut <marek.vasut+renesas@mailbox.org>]

Extract only vendor ID from VID register, the top 4 bits are
revision ID which are not useful for the vendor ID check.

Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
---
Cc: Alexander Stein <alexander.stein@ew.tq-group.com>
Cc: Conor Dooley <conor+dt@kernel.org>
Cc: Geert Uytterhoeven <geert+renesas@glider.be>
Cc: Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>
Cc: Michael Turquette <mturquette@baylibre.com>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Stephen Boyd <sboyd@kernel.org>
Cc: devicetree@vger.kernel.org
Cc: linux-clk@vger.kernel.org
Cc: linux-renesas-soc@vger.kernel.org
---
V2: Split off patch from 4/4
---
 drivers/clk/clk-renesas-pcie.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/clk/clk-renesas-pcie.c b/drivers/clk/clk-renesas-pcie.c
index 6606aba253c5..b5c430e4899c 100644
--- a/drivers/clk/clk-renesas-pcie.c
+++ b/drivers/clk/clk-renesas-pcie.c
@@ -42,6 +42,7 @@
 #define RS9_REG_DID				0x6
 #define RS9_REG_BCP				0x7
 
+#define RS9_REG_VID_MASK			GENMASK(3, 0)
 #define RS9_REG_VID_IDT				0x01
 
 #define RS9_REG_DID_TYPE_FGV			(0x0 << RS9_REG_DID_TYPE_SHIFT)
@@ -333,6 +334,7 @@ static int rs9_probe(struct i2c_client *client)
 	if (ret < 0)
 		return ret;
 
+	vid &= RS9_REG_VID_MASK;
 	if (vid != RS9_REG_VID_IDT || did != rs9->chip_info->did)
 		return dev_err_probe(&client->dev, -ENODEV,
 				     "Incorrect VID/DID: %#02x, %#02x. Expected %#02x, %#02x\n",
-- 
2.42.0