linux-kernel - [PATCH RFT] regulator: fan53555: Fix off-by-one for TCS4525

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Message-Id: <20210427134529.818784-1-axel.lin@ingics.com>
Date:   Tue, 27 Apr 2021 21:45:29 +0800
From:   Axel Lin <axel.lin@...ics.com>
To:     Mark Brown <broonie@...nel.org>
Cc:     Joseph Chen <chenjh@...k-chips.com>,
        Ezequiel Garcia <ezequiel@...labora.com>,
        Liam Girdwood <lgirdwood@...il.com>,
        linux-kernel@...r.kernel.org, Axel Lin <axel.lin@...ics.com>
Subject: [PATCH RFT] regulator: fan53555: Fix off-by-one for TCS4525_NVOLTAGES

While at it, also remove unused TCS_VSEL_NSEL_MASK.

Signed-off-by: Axel Lin <axel.lin@...ics.com>
---
Hi Joseph & Ezequiel,
The TCS4525_NVOLTAGES is unlikely to be 127 because if it's 127 the
rdesc->vsel_mask will be 126 (i.e. 0b1111110, which only allows 64 different selectors).
I don't have the hw to verify (I just read the code and I might be wrong),
please check if this patch is correct or not.
Thanks,
Axel
 drivers/regulator/fan53555.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/regulator/fan53555.c b/drivers/regulator/fan53555.c
index f3918f03aaf3..aa963435d2b2 100644
--- a/drivers/regulator/fan53555.c
+++ b/drivers/regulator/fan53555.c
@@ -55,9 +55,8 @@
 
 #define FAN53555_NVOLTAGES	64	/* Numbers of voltages */
 #define FAN53526_NVOLTAGES	128
-#define TCS4525_NVOLTAGES	127	/* Numbers of voltages */
+#define TCS4525_NVOLTAGES	128	/* Numbers of voltages */
 
-#define TCS_VSEL_NSEL_MASK	0x7f
 #define TCS_VSEL0_MODE		(1 << 7)
 #define TCS_VSEL1_MODE		(1 << 6)
 
-- 
2.25.1