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Date: Wed, 29 Jul 2020 22:37:49 +0200
From: Sebastian Reichel <sre@...nel.org>
To: Dan Murphy <dmurphy@...com>
Cc: afd@...com, pali@...nel.org, linux-pm@...r.kernel.org,
linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
robh@...nel.org
Subject: Re: [PATCH v6 2/4] power: supply: bq27xxx_battery: Add the BQ27Z561
Battery monitor
Hi,
On Wed, Jul 29, 2020 at 01:31:43PM -0500, Dan Murphy wrote:
> Add the Texas Instruments BQ27Z561 battery monitor. The register address
> map is laid out the same as compared to other devices within the file.
> The battery status register has differing bits to determine if the
> battery is full, discharging or dead.
>
> Signed-off-by: Dan Murphy <dmurphy@...com>
> ---
Thanks, queued.
-- Sebastian
> drivers/power/supply/bq27xxx_battery.c | 68 +++++++++++++++++++++-
> drivers/power/supply/bq27xxx_battery_i2c.c | 2 +
> include/linux/power/bq27xxx_battery.h | 1 +
> 3 files changed, 70 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/power/supply/bq27xxx_battery.c b/drivers/power/supply/bq27xxx_battery.c
> index acaafed037be..a05b9a2d112d 100644
> --- a/drivers/power/supply/bq27xxx_battery.c
> +++ b/drivers/power/supply/bq27xxx_battery.c
> @@ -43,6 +43,7 @@
> * https://www.ti.com/product/bq27411-g1
> * https://www.ti.com/product/bq27441-g1
> * https://www.ti.com/product/bq27621-g1
> + * https://www.ti.com/product/bq27z561
> */
>
> #include <linux/device.h>
> @@ -79,6 +80,11 @@
> #define BQ27000_FLAG_FC BIT(5)
> #define BQ27000_FLAG_CHGS BIT(7) /* Charge state flag */
>
> +/* BQ27Z561 has different layout for Flags register */
> +#define BQ27Z561_FLAG_FDC BIT(4) /* Battery fully discharged */
> +#define BQ27Z561_FLAG_FC BIT(5) /* Battery fully charged */
> +#define BQ27Z561_FLAG_DIS_CH BIT(6) /* Battery is discharging */
> +
> /* control register params */
> #define BQ27XXX_SEALED 0x20
> #define BQ27XXX_SET_CFGUPDATE 0x13
> @@ -431,12 +437,32 @@ static u8
> [BQ27XXX_REG_DCAP] = 0x3c,
> [BQ27XXX_REG_AP] = 0x18,
> BQ27XXX_DM_REG_ROWS,
> - };
> + },
> #define bq27411_regs bq27421_regs
> #define bq27425_regs bq27421_regs
> #define bq27426_regs bq27421_regs
> #define bq27441_regs bq27421_regs
> #define bq27621_regs bq27421_regs
> + bq27z561_regs[BQ27XXX_REG_MAX] = {
> + [BQ27XXX_REG_CTRL] = 0x00,
> + [BQ27XXX_REG_TEMP] = 0x06,
> + [BQ27XXX_REG_INT_TEMP] = INVALID_REG_ADDR,
> + [BQ27XXX_REG_VOLT] = 0x08,
> + [BQ27XXX_REG_AI] = 0x14,
> + [BQ27XXX_REG_FLAGS] = 0x0a,
> + [BQ27XXX_REG_TTE] = 0x16,
> + [BQ27XXX_REG_TTF] = 0x18,
> + [BQ27XXX_REG_TTES] = INVALID_REG_ADDR,
> + [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
> + [BQ27XXX_REG_NAC] = INVALID_REG_ADDR,
> + [BQ27XXX_REG_FCC] = 0x12,
> + [BQ27XXX_REG_CYCT] = 0x2a,
> + [BQ27XXX_REG_AE] = 0x22,
> + [BQ27XXX_REG_SOC] = 0x2c,
> + [BQ27XXX_REG_DCAP] = 0x3c,
> + [BQ27XXX_REG_AP] = 0x22,
> + BQ27XXX_DM_REG_ROWS,
> + };
>
> static enum power_supply_property bq27000_props[] = {
> POWER_SUPPLY_PROP_STATUS,
> @@ -672,6 +698,25 @@ static enum power_supply_property bq27421_props[] = {
> #define bq27441_props bq27421_props
> #define bq27621_props bq27421_props
>
> +static enum power_supply_property bq27z561_props[] = {
> + POWER_SUPPLY_PROP_STATUS,
> + POWER_SUPPLY_PROP_PRESENT,
> + POWER_SUPPLY_PROP_VOLTAGE_NOW,
> + POWER_SUPPLY_PROP_CURRENT_NOW,
> + POWER_SUPPLY_PROP_CAPACITY,
> + POWER_SUPPLY_PROP_CAPACITY_LEVEL,
> + POWER_SUPPLY_PROP_TEMP,
> + POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
> + POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
> + POWER_SUPPLY_PROP_TECHNOLOGY,
> + POWER_SUPPLY_PROP_CHARGE_FULL,
> + POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
> + POWER_SUPPLY_PROP_CYCLE_COUNT,
> + POWER_SUPPLY_PROP_POWER_AVG,
> + POWER_SUPPLY_PROP_HEALTH,
> + POWER_SUPPLY_PROP_MANUFACTURER,
> +};
> +
> struct bq27xxx_dm_reg {
> u8 subclass_id;
> u8 offset;
> @@ -767,11 +812,14 @@ static struct bq27xxx_dm_reg bq27621_dm_regs[] = {
> #define bq27621_dm_regs 0
> #endif
>
> +#define bq27z561_dm_regs 0
> +
> #define BQ27XXX_O_ZERO 0x00000001
> #define BQ27XXX_O_OTDC 0x00000002 /* has OTC/OTD overtemperature flags */
> #define BQ27XXX_O_UTOT 0x00000004 /* has OT overtemperature flag */
> #define BQ27XXX_O_CFGUP 0x00000008
> #define BQ27XXX_O_RAM 0x00000010
> +#define BQ27Z561_O_BITS 0x00000020
>
> #define BQ27XXX_DATA(ref, key, opt) { \
> .opts = (opt), \
> @@ -816,6 +864,7 @@ static struct {
> [BQ27426] = BQ27XXX_DATA(bq27426, 0x80008000, BQ27XXX_O_UTOT | BQ27XXX_O_CFGUP | BQ27XXX_O_RAM),
> [BQ27441] = BQ27XXX_DATA(bq27441, 0x80008000, BQ27XXX_O_UTOT | BQ27XXX_O_CFGUP | BQ27XXX_O_RAM),
> [BQ27621] = BQ27XXX_DATA(bq27621, 0x80008000, BQ27XXX_O_UTOT | BQ27XXX_O_CFGUP | BQ27XXX_O_RAM),
> + [BQ27Z561] = BQ27XXX_DATA(bq27z561, 0 , BQ27Z561_O_BITS),
> };
>
> static DEFINE_MUTEX(bq27xxx_list_lock);
> @@ -1551,6 +1600,8 @@ static bool bq27xxx_battery_dead(struct bq27xxx_device_info *di, u16 flags)
> {
> if (di->opts & BQ27XXX_O_ZERO)
> return flags & (BQ27000_FLAG_EDV1 | BQ27000_FLAG_EDVF);
> + else if (di->opts & BQ27Z561_O_BITS)
> + return flags & BQ27Z561_FLAG_FDC;
> else
> return flags & (BQ27XXX_FLAG_SOC1 | BQ27XXX_FLAG_SOCF);
> }
> @@ -1595,6 +1646,7 @@ void bq27xxx_battery_update(struct bq27xxx_device_info *di)
> cache.time_to_empty_avg = bq27xxx_battery_read_time(di, BQ27XXX_REG_TTECP);
> if (di->regs[BQ27XXX_REG_TTF] != INVALID_REG_ADDR)
> cache.time_to_full = bq27xxx_battery_read_time(di, BQ27XXX_REG_TTF);
> +
> cache.charge_full = bq27xxx_battery_read_fcc(di);
> cache.capacity = bq27xxx_battery_read_soc(di);
> if (di->regs[BQ27XXX_REG_AE] != INVALID_REG_ADDR)
> @@ -1682,6 +1734,13 @@ static int bq27xxx_battery_status(struct bq27xxx_device_info *di,
> status = POWER_SUPPLY_STATUS_NOT_CHARGING;
> else
> status = POWER_SUPPLY_STATUS_DISCHARGING;
> + } else if (di->opts & BQ27Z561_O_BITS) {
> + if (di->cache.flags & BQ27Z561_FLAG_FC)
> + status = POWER_SUPPLY_STATUS_FULL;
> + else if (di->cache.flags & BQ27Z561_FLAG_DIS_CH)
> + status = POWER_SUPPLY_STATUS_DISCHARGING;
> + else
> + status = POWER_SUPPLY_STATUS_CHARGING;
> } else {
> if (di->cache.flags & BQ27XXX_FLAG_FC)
> status = POWER_SUPPLY_STATUS_FULL;
> @@ -1710,6 +1769,13 @@ static int bq27xxx_battery_capacity_level(struct bq27xxx_device_info *di,
> level = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
> else
> level = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
> + } else if (di->opts & BQ27Z561_O_BITS) {
> + if (di->cache.flags & BQ27Z561_FLAG_FC)
> + level = POWER_SUPPLY_CAPACITY_LEVEL_FULL;
> + else if (di->cache.flags & BQ27Z561_FLAG_FDC)
> + level = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
> + else
> + level = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
> } else {
> if (di->cache.flags & BQ27XXX_FLAG_FC)
> level = POWER_SUPPLY_CAPACITY_LEVEL_FULL;
> diff --git a/drivers/power/supply/bq27xxx_battery_i2c.c b/drivers/power/supply/bq27xxx_battery_i2c.c
> index 8e114a7abfc9..15f4e75786ab 100644
> --- a/drivers/power/supply/bq27xxx_battery_i2c.c
> +++ b/drivers/power/supply/bq27xxx_battery_i2c.c
> @@ -253,6 +253,7 @@ static const struct i2c_device_id bq27xxx_i2c_id_table[] = {
> { "bq27426", BQ27426 },
> { "bq27441", BQ27441 },
> { "bq27621", BQ27621 },
> + { "bq27z561", BQ27Z561 },
> {},
> };
> MODULE_DEVICE_TABLE(i2c, bq27xxx_i2c_id_table);
> @@ -286,6 +287,7 @@ static const struct of_device_id bq27xxx_battery_i2c_of_match_table[] = {
> { .compatible = "ti,bq27426" },
> { .compatible = "ti,bq27441" },
> { .compatible = "ti,bq27621" },
> + { .compatible = "ti,bq27z561" },
> {},
> };
> MODULE_DEVICE_TABLE(of, bq27xxx_battery_i2c_of_match_table);
> diff --git a/include/linux/power/bq27xxx_battery.h b/include/linux/power/bq27xxx_battery.h
> index 507c5e214c42..1f6ea5d5063d 100644
> --- a/include/linux/power/bq27xxx_battery.h
> +++ b/include/linux/power/bq27xxx_battery.h
> @@ -30,6 +30,7 @@ enum bq27xxx_chip {
> BQ27426,
> BQ27441,
> BQ27621,
> + BQ27Z561,
> };
>
> struct bq27xxx_device_info;
> --
> 2.28.0
>
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