sensor: bq274xx: fix design energy calculation

mcunha-rsc · jhedberg · commit 1c2d7f48eeed · 2025-11-03T16:59:14.000+02:00
In the function bq274xx_gauge_configure it was being used an hardocded
value of 3.7V instead of using the design voltage parameter defined in
the device tree.

Signed-off-by: Marcelo Cunha &lt;mcunha@petsafe.net&gt;
diff --git a/drivers/sensor/ti/bq274xx/bq274xx.c b/drivers/sensor/ti/bq274xx/bq274xx.c
@@ -418,7 +418,8 @@ static int bq274xx_gauge_configure(const struct device *dev)
 	}
 	regs = data->regs;
 
-	designenergy_mwh = (uint32_t)config->design_capacity * 37 / 10; /* x3.7 */
+	designenergy_mwh = (uint32_t)config->design_capacity *
+					((uint32_t)config->design_voltage) / 1000;
 	taperrate = config->design_capacity * 10 / config->taper_current;
 
 	ret = bq274xx_ctrl_reg_write(dev, BQ274XX_UNSEAL_KEY_A);

Original file line number	Diff line number	Diff line change
`@@ -418,7 +418,8 @@ static int bq274xx_gauge_configure(const struct device *dev)`
`418`	`418`	`}`
`419`	`419`	`regs = data->regs;`
`420`	`420`
`421`		`- designenergy_mwh = (uint32_t)config->design_capacity * 37 / 10; /* x3.7 */`
	`421`	`+ designenergy_mwh = (uint32_t)config->design_capacity *`
	`422`	`+ ((uint32_t)config->design_voltage) / 1000;`
`422`	`423`	`taperrate = config->design_capacity * 10 / config->taper_current;`
`423`	`424`
`424`	`425`	`ret = bq274xx_ctrl_reg_write(dev, BQ274XX_UNSEAL_KEY_A);`