[PATCH 5.12 119/173] regulator: scmi: Fix off-by-one for linear regulators .n_voltages setting

[Greg Kroah-Hartman]

From: Axel Lin <axel.lin@xxxxxxxxxx>

commit 36cb555fae0875d5416e8514a84a427bec6e4cda upstream.

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@xxxxxxxxxx>
Reviewed-by: Cristian Marussi <cristian.marussi@xxxxxxx>
Link: https://lore.kernel.org/r/20210521073020.1944981-1-axel.lin@xxxxxxxxxx
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 drivers/regulator/scmi-regulator.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/regulator/scmi-regulator.c
+++ b/drivers/regulator/scmi-regulator.c
@@ -176,7 +176,7 @@ scmi_config_linear_regulator_mappings(st
 		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;
 	}