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From: Axel Lin <axel.lin@ingics.com>
To: Mark Brown <broonie@kernel.org>
Cc: Cristian Marussi <cristian.marussi@arm.com>,
	Liam Girdwood <lgirdwood@gmail.com>,
	linux-kernel@vger.kernel.org, Axel Lin <axel.lin@ingics.com>
Subject: [PATCH] regulator: scmi: Fix off-by-one for linear regulators .n_voltages setting
Date: Fri, 21 May 2021 15:30:20 +0800	[thread overview]
Message-ID: <20210521073020.1944981-1-axel.lin@ingics.com> (raw)

For linear regulators, the .n_voltages is (max_uv - min_uv) / uv_step + 1.

Fixes: 0fbeae70ee7c ("regulator: add SCMI driver")
Signed-off-by: Axel Lin <axel.lin@ingics.com>
---
 drivers/regulator/scmi-regulator.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/regulator/scmi-regulator.c b/drivers/regulator/scmi-regulator.c
index bbadf72b94e8..1f02f60ad136 100644
--- a/drivers/regulator/scmi-regulator.c
+++ b/drivers/regulator/scmi-regulator.c
@@ -173,7 +173,7 @@ scmi_config_linear_regulator_mappings(struct scmi_regulator *sreg,
 		sreg->desc.uV_step =
 			vinfo->levels_uv[SCMI_VOLTAGE_SEGMENT_STEP];
 		sreg->desc.linear_min_sel = 0;
-		sreg->desc.n_voltages = delta_uV / sreg->desc.uV_step;
+		sreg->desc.n_voltages = (delta_uV / sreg->desc.uV_step) + 1;
 		sreg->desc.ops = &scmi_reg_linear_ops;
 	}
 
-- 
2.25.1


             reply	other threads:[~2021-05-21  7:31 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-21  7:30 Axel Lin [this message]
2021-05-21 18:26 ` [PATCH] regulator: scmi: Fix off-by-one for linear regulators .n_voltages setting Cristian Marussi
2021-05-21 19:37 ` Mark Brown

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