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clk: rs9: Limit check to vendor ID in VID register

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

Reviewed-by: Biju Das <biju.das.jz@bp.renesas.com>
Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
Link: https://lore.kernel.org/r/20231113221949.111964-2-marek.vasut+renesas@mailbox.org
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
This commit is contained in:
Marek Vasut 2023-11-13 23:18:52 +01:00 committed by Stephen Boyd
parent ff1b5154b5
commit 780da7f11a
1 changed files with 2 additions and 0 deletions
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2
drivers/clk/clk-renesas-pcie.c
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@ -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",