From 3ae5f06681fc0e9ce6a0ac4f909aa7695e1f3228 Mon Sep 17 00:00:00 2001 From: Tony Lindgren Date: Wed, 3 May 2017 17:15:30 -0700 Subject: [PATCH] power: supply: cpcap-charger: Fix charge voltage configuration We have the charge voltage wrong, it should be 4.35V instead of 4.2V. This will cause the battery to never get fully charged. I noticed this when looking at the Andoid kernel battery and charger status for a fully charged battery: POWER_SUPPLY_VOLTAGE_NOW=4351000 Also the battery on droid 4 says "4.35, 1735/1785mAh (min/typ), 6.6/6.8 Wh (min/typ)". Presumably the 4.35 on the battery is the charge voltage. And finally, on Android the CPCAP CRM register is set to 0x03b5 where the b is the charge voltage. Let's fix the charge voltage define and update the charge configuration to use the 4.35V setting. Fixes: 0c9888e3c192 ("power: supply: cpcap-charger: Add minimal CPCAP PMIC battery charger") Cc: Marcel Partap Cc: Michael Scott Signed-off-by: Tony Lindgren Signed-off-by: Sebastian Reichel --- drivers/power/supply/cpcap-charger.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/power/supply/cpcap-charger.c b/drivers/power/supply/cpcap-charger.c index 17907fc..33ca117 100644 --- a/drivers/power/supply/cpcap-charger.c +++ b/drivers/power/supply/cpcap-charger.c @@ -76,7 +76,7 @@ #define CPCAP_REG_CRM_VCHRG_4V30 CPCAP_REG_CRM_VCHRG(0x8) #define CPCAP_REG_CRM_VCHRG_4V32 CPCAP_REG_CRM_VCHRG(0x9) #define CPCAP_REG_CRM_VCHRG_4V34 CPCAP_REG_CRM_VCHRG(0xa) -#define CPCAP_REG_CRM_VCHRG_4V36 CPCAP_REG_CRM_VCHRG(0xb) +#define CPCAP_REG_CRM_VCHRG_4V35 CPCAP_REG_CRM_VCHRG(0xb) #define CPCAP_REG_CRM_VCHRG_4V38 CPCAP_REG_CRM_VCHRG(0xc) #define CPCAP_REG_CRM_VCHRG_4V40 CPCAP_REG_CRM_VCHRG(0xd) #define CPCAP_REG_CRM_VCHRG_4V42 CPCAP_REG_CRM_VCHRG(0xe) @@ -433,7 +433,7 @@ static void cpcap_usb_detect(struct work_struct *work) max_current = CPCAP_REG_CRM_ICHRG_0A528; error = cpcap_charger_set_state(ddata, - CPCAP_REG_CRM_VCHRG_4V20, + CPCAP_REG_CRM_VCHRG_4V35, max_current, CPCAP_REG_CRM_TR_0A72); if (error) -- 2.7.4