Re: [PATCH] bq25890_charger.c : add the BQ25896 part

From: Krzysztof Kozlowski
Date: Wed Jul 25 2018 - 05:58:44 EST

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On 23 July 2018 at 15:51, Angus Ainslie <angus@xxxxxxxx> wrote:
> Add some debugging to be able to check the proper initialization
> of the BQ25896 part.

Hi,

This should be split into separate patchset. Do not mix two features
in one commit.

> Enable the BQ25896 part.
>
> Add 2 new parameters "voltage_now" and "model_name".
>
> Signed-off-by: Angus Ainslie <angus.ainslie@xxxxxxx>

Your signed-off-by does not match From address.

> ---
> drivers/power/supply/bq25890_charger.c | 68 ++++++++++++++++++++++----
> 1 file changed, 58 insertions(+), 10 deletions(-)
>
> diff --git a/drivers/power/supply/bq25890_charger.c b/drivers/power/supply/bq25890_charger.c
> index 8e2c41ded171..32cdae15ce40 100644
> --- a/drivers/power/supply/bq25890_charger.c
> +++ b/drivers/power/supply/bq25890_charger.c
> @@ -32,6 +32,7 @@
> #define BQ25890_IRQ_PIN "bq25890_irq"
>
> #define BQ25890_ID 3
> +#define BQ25896_ID 0
>
> enum bq25890_fields {
> F_EN_HIZ, F_EN_ILIM, F_IILIM, /* Reg00 */
> @@ -153,8 +154,8 @@ static const struct reg_field bq25890_reg_fields[] = {
> [F_CONV_RATE] = REG_FIELD(0x02, 6, 6),
> [F_BOOSTF] = REG_FIELD(0x02, 5, 5),
> [F_ICO_EN] = REG_FIELD(0x02, 4, 4),
> - [F_HVDCP_EN] = REG_FIELD(0x02, 3, 3),
> - [F_MAXC_EN] = REG_FIELD(0x02, 2, 2),
> + [F_HVDCP_EN] = REG_FIELD(0x02, 3, 3), // reserved on BQ25896
> + [F_MAXC_EN] = REG_FIELD(0x02, 2, 2), // reserved on BQ25896
> [F_FORCE_DPM] = REG_FIELD(0x02, 1, 1),
> [F_AUTO_DPDM_EN] = REG_FIELD(0x02, 0, 0),
> /* REG03 */
> @@ -163,6 +164,7 @@ static const struct reg_field bq25890_reg_fields[] = {
> [F_OTG_CFG] = REG_FIELD(0x03, 5, 5),
> [F_CHG_CFG] = REG_FIELD(0x03, 4, 4),
> [F_SYSVMIN] = REG_FIELD(0x03, 1, 3),
> + /* MIN_VBAT_SEL on BQ25896 */
> /* REG04 */
> [F_PUMPX_EN] = REG_FIELD(0x04, 7, 7),
> [F_ICHG] = REG_FIELD(0x04, 0, 6),
> @@ -181,7 +183,7 @@ static const struct reg_field bq25890_reg_fields[] = {
> [F_CHG_TMR] = REG_FIELD(0x07, 1, 2),
> [F_JEITA_ISET] = REG_FIELD(0x07, 0, 0),
> /* REG08 */
> - [F_BATCMP] = REG_FIELD(0x08, 6, 7),
> + [F_BATCMP] = REG_FIELD(0x08, 6, 7), // 5-7 on BQ25896

So this field is different on BQ25896...

> [F_VCLAMP] = REG_FIELD(0x08, 2, 4),
> [F_TREG] = REG_FIELD(0x08, 0, 1),
> /* REG09 */
> @@ -195,12 +197,13 @@ static const struct reg_field bq25890_reg_fields[] = {
> [F_PUMPX_DN] = REG_FIELD(0x09, 0, 0),
> /* REG0A */
> [F_BOOSTV] = REG_FIELD(0x0A, 4, 7),
> + /* PFM_OTG_DIS 3 on BQ25896 */
> [F_BOOSTI] = REG_FIELD(0x0A, 0, 2),
> /* REG0B */
> [F_VBUS_STAT] = REG_FIELD(0x0B, 5, 7),
> [F_CHG_STAT] = REG_FIELD(0x0B, 3, 4),
> [F_PG_STAT] = REG_FIELD(0x0B, 2, 2),
> - [F_SDP_STAT] = REG_FIELD(0x0B, 1, 1),
> + [F_SDP_STAT] = REG_FIELD(0x0B, 1, 1), // reserved on BQ25896
> [F_VSYS_STAT] = REG_FIELD(0x0B, 0, 0),
> /* REG0C */
> [F_WD_FAULT] = REG_FIELD(0x0C, 7, 7),
> @@ -401,6 +404,18 @@ static int bq25890_power_supply_get_property(struct power_supply *psy,
> val->strval = BQ25890_MANUFACTURER;
> break;
>
> + case POWER_SUPPLY_PROP_MODEL_NAME:
> + bq->chip_id = bq25890_field_read(bq, F_PN);

Why do you need to read it again?

> +
> + if (bq->chip_id == BQ25890_ID)
> + val->strval = "BQ25890";
> + else if (bq->chip_id == BQ25896_ID)
> + val->strval = "BQ25896";
> + else
> + val->strval = "UNKNOWN";
> +
> + break;
> +
> case POWER_SUPPLY_PROP_ONLINE:
> val->intval = state.online;
> break;
> @@ -453,6 +468,20 @@ static int bq25890_power_supply_get_property(struct power_supply *psy,
> val->intval = bq25890_find_val(bq->init_data.iterm, TBL_ITERM);
> break;
>
> + case POWER_SUPPLY_PROP_VOLTAGE_NOW:
> + if (!state.online) {
> + val->intval = 0;
> + break;
> + }

This looks like unrelated change. Please split it.

> +
> + ret = bq25890_field_read(bq, F_SYSV); /* read measured value */
> + if (ret < 0)
> + return ret;
> +
> + /* converted_val = 2.304V + ADC_val * 20mV (table 10.3.15) */
> + val->intval = 2304000 + ret * 20000;
> + break;
> +
> default:
> return -EINVAL;
> }
> @@ -608,30 +637,43 @@ static int bq25890_hw_init(struct bq25890_device *bq)
> };
>
> ret = bq25890_chip_reset(bq);
> - if (ret < 0)
> + if (ret < 0) {
> + dev_dbg(bq->dev, "BQ259x reset failed %d\n", ret);

"BQ259x" prefix is not needed.

> return ret;
> + }
>
> /* disable watchdog */
> ret = bq25890_field_write(bq, F_WD, 0);
> - if (ret < 0)
> + if (ret < 0) {
> + dev_dbg(bq->dev, "disabling watchdog failed %d\n", ret );

1. Run checkpatch to point coding style issues and fix them.
2. Start string with capital letter.

> return ret;
> + }
>
> /* initialize currents/voltages and other parameters */
> for (i = 0; i < ARRAY_SIZE(init_data); i++) {
> ret = bq25890_field_write(bq, init_data[i].id,
> init_data[i].value);
> - if (ret < 0)
> + if (ret < 0) {
> + dev_dbg(bq->dev, "writing init data failed %d\n",
> + ret);

Start string with capital letter.

> return ret;
> + }
> }
>
> /* Configure ADC for continuous conversions. This does not enable it. */
> ret = bq25890_field_write(bq, F_CONV_RATE, 1);
> - if (ret < 0)
> + if (ret < 0) {
> + dev_dbg(bq->dev, "Config ADC failed %d\n",
> + ret);

Line break looks unneeded. Run checkpatch.

> return ret;
> + }
>
> ret = bq25890_get_chip_state(bq, &state);
> - if (ret < 0)
> + if (ret < 0) {
> + dev_dbg(bq->dev, "BQ2589x get state failed %d\n",
> + ret);

Prefix is not needed.

> return ret;
> + }
>
> mutex_lock(&bq->lock);
> bq->state = state;
> @@ -644,12 +686,14 @@ static enum power_supply_property bq25890_power_supply_props[] = {
> POWER_SUPPLY_PROP_MANUFACTURER,
> POWER_SUPPLY_PROP_STATUS,
> POWER_SUPPLY_PROP_ONLINE,
> + POWER_SUPPLY_PROP_MODEL_NAME,
> POWER_SUPPLY_PROP_HEALTH,
> POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
> POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
> POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
> POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
> POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT,
> + POWER_SUPPLY_PROP_VOLTAGE_NOW,
> };
>
> static char *bq25890_charger_supplied_to[] = {
> @@ -767,6 +811,9 @@ static int bq25890_fw_read_u32_props(struct bq25890_device *bq)
> if (props[i].optional)
> continue;
>
> + printk( KERN_ERR "unable to read property %d %s\n", ret
> + , props[i].name );

Remove it. And again - run checkpatch.

> +
> return ret;
> }
>
> @@ -840,7 +887,7 @@ static int bq25890_probe(struct i2c_client *client,
> return bq->chip_id;
> }
>
> - if (bq->chip_id != BQ25890_ID) {
> + if ((bq->chip_id != BQ25890_ID) && (bq->chip_id != BQ25896_ID)) {
> dev_err(dev, "Chip with ID=%d, not supported!\n", bq->chip_id);
> return -ENODEV;
> }
> @@ -966,6 +1013,7 @@ MODULE_DEVICE_TABLE(i2c, bq25890_i2c_ids);
>
> static const struct of_device_id bq25890_of_match[] = {
> { .compatible = "ti,bq25890", },
> + { .compatible = "ti,bq25896", },

Document the compatible. If you run checkpatch.... it would point it.

Best regards,
Krzysztof

Next message: Aapo Vienamo: "Re: [PATCH 02/10] mmc: tegra: Set calibration pad voltage reference"
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