On 16.09.2015 02:58, Andreas Dannenberg wrote:
> The patch adds a way to setup and initialize the device through the use
> of platform data with configuration options equivalent to when using
> device firmware (DT or ACPI) for systems where this is not available.
>
> Signed-off-by: Andreas Dannenberg <[email protected]>
> ---
> drivers/power/bq24257_charger.c | 117
> ++++++++++++++++++++++++++++++----
> include/linux/power/bq24257_charger.h | 29 +++++++++
> 2 files changed, 135 insertions(+), 11 deletions(-)
> create mode 100644 include/linux/power/bq24257_charger.h
>
> diff --git a/drivers/power/bq24257_charger.c b/drivers/power/bq24257_charger.c
> index a0cb33c..fa18b1f 100644
> --- a/drivers/power/bq24257_charger.c
> +++ b/drivers/power/bq24257_charger.c
> @@ -27,10 +27,13 @@
> #include <linux/gpio/consumer.h>
> #include <linux/interrupt.h>
> #include <linux/delay.h>
> +#include <linux/gpio.h>
>
> #include <linux/acpi.h>
> #include <linux/of.h>
>
> +#include <linux/power/bq24257_charger.h>
> +
> #define BQ24257_REG_1 0x00
> #define BQ24257_REG_2 0x01
> #define BQ24257_REG_3 0x02
> @@ -877,28 +880,112 @@ static int bq24257_power_supply_init(struct
> bq24257_device *bq)
>
> static int bq24257_irq_probe(struct bq24257_device *bq)
> {
> + struct bq24257_platform_data *pdata = bq->client->dev.platform_data;
> struct gpio_desc *stat_irq;
> + int ret;
> +
> + if (!pdata) {
> + stat_irq = devm_gpiod_get_index(bq->dev, BQ24257_STAT_IRQ, 0,
> + GPIOD_IN);
> + if (IS_ERR(stat_irq)) {
> + dev_err(bq->dev, "could not probe stat_irq pin\n");
> + return PTR_ERR(stat_irq);
> + }
> + } else {
> + if (!gpio_is_valid(pdata->stat_gpio)) {
> + dev_err(bq->dev, "invalid stat_irq pin\n");
> + return -EINVAL;
> + }
>
> - stat_irq = devm_gpiod_get_index(bq->dev, BQ24257_STAT_IRQ, 0, GPIOD_IN);
> - if (IS_ERR(stat_irq)) {
> - dev_err(bq->dev, "could not probe stat_irq pin\n");
> - return PTR_ERR(stat_irq);
> + ret = devm_gpio_request_one(bq->dev, pdata->stat_gpio,
> + GPIOD_IN, BQ24257_STAT_IRQ);
That should be GPIOF_* flag, not GPIOD.
> + if (ret) {
> + dev_err(bq->dev, "stat_irq pin request failed\n");
> + return ret;
> + }
> +
> + stat_irq = gpio_to_desc(pdata->stat_gpio);
> + if (!stat_irq) {
> + dev_err(bq->dev,
> + "could not get stat_irq pin descriptor\n");
> + return -EINVAL;
> + }
> }
>
> + dev_dbg(bq->dev, "probed stat_irq pin = %d", desc_to_gpio(stat_irq));
> +
> return gpiod_to_irq(stat_irq);
> }
>
> static int bq24257_pg_gpio_probe(struct bq24257_device *bq)
> {
> - bq->pg = devm_gpiod_get_index(bq->dev, BQ24257_PG_GPIO, 0, GPIOD_IN);
> - if (IS_ERR(bq->pg)) {
> - dev_info(bq->dev, "could not probe PG pin\n");
> - return PTR_ERR(bq->pg);
> + struct bq24257_platform_data *pdata = bq->client->dev.platform_data;
> + int ret;
> +
> + if (!pdata) {
> + bq->pg = devm_gpiod_get_index(bq->dev, BQ24257_PG_GPIO, 0,
> + GPIOD_IN);
> + if (IS_ERR(bq->pg)) {
> + dev_info(bq->dev, "could not probe PG pin\n");
> + return PTR_ERR(bq->pg);
> + }
> + } else {
> + if (!gpio_is_valid(pdata->pg_gpio)) {
> + dev_info(bq->dev, "invalid PG pin\n");
> + return -EINVAL;
> + }
> +
> + ret = devm_gpio_request_one(bq->dev, pdata->pg_gpio,
> + GPIOD_IN, BQ24257_PG_GPIO);
ditto
> + if (ret) {
> + dev_info(bq->dev, "PG pin request failed\n");
> + return ret;
> + }
> +
> + bq->pg = gpio_to_desc(pdata->pg_gpio);
> + if (!bq->pg) {
> + dev_info(bq->dev, "could not get PG pin descriptor\n");
> + return -EINVAL;
> + }
> }
>
> + dev_dbg(bq->dev, "probed PG pin = %d", desc_to_gpio(bq->pg));
> +
> return 0;
> }
>
> +static void bq24257_pdata_probe(struct bq24257_device *bq,
> + struct bq24257_platform_data *pdata)
> +{
> + bq->init_data.ichg = bq24257_find_idx(pdata->ichg,
> + bq24257_ichg_map,
> + BQ24257_ICHG_MAP_SIZE);
> +
> + bq->init_data.vbat = bq24257_find_idx(pdata->vbat,
> + bq24257_vbat_map,
> + BQ24257_VBAT_MAP_SIZE);
> +
> + bq->init_data.iterm = bq24257_find_idx(pdata->iterm,
> + bq24257_iterm_map,
> + BQ24257_ITERM_MAP_SIZE);
> +
> + bq->init_data.in_ilimit = bq24257_find_idx(pdata->in_ilimit,
> + bq24257_iilimit_map,
> + BQ24257_IILIMIT_MAP_SIZE);
> +
> + bq->init_data.vovp = bq24257_find_idx(pdata->vovp,
> + bq24257_vovp_map,
> + BQ24257_VOVP_MAP_SIZE);
> +
> + bq->init_data.vindpm = bq24257_find_idx(pdata->vindpm,
> + bq24257_vindpm_map,
> + BQ24257_VINDPM_MAP_SIZE);
> +
> + bq->in_ilimit_autoset_disable = pdata->in_ilimit_autoset_disable;
> +
> + bq->pg_gpio_disable = pdata->pg_gpio_disable;
> +}
> +
> static int bq24257_fw_probe(struct bq24257_device *bq)
> {
> int ret;
> @@ -974,6 +1061,7 @@ static int bq24257_probe(struct i2c_client *client,
> struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
> struct device *dev = &client->dev;
> const struct acpi_device_id *acpi_id;
> + struct bq24257_platform_data *pdata = client->dev.platform_data;
> struct bq24257_device *bq;
> int ret;
> int i;
> @@ -1023,14 +1111,15 @@ static int bq24257_probe(struct i2c_client *client,
>
> i2c_set_clientdata(client, bq);
>
> - if (!dev->platform_data) {
> + if (!pdata) {
> ret = bq24257_fw_probe(bq);
> if (ret < 0) {
> dev_err(dev, "Cannot read device properties.\n");
> return ret;
> }
> } else {
> - return -ENODEV;
> + dev_dbg(dev, "init using platform data\n");
> + bq24257_pdata_probe(bq, pdata);
> }
>
> /*
> @@ -1087,7 +1176,13 @@ static int bq24257_probe(struct i2c_client *client,
> return ret;
> }
>
> - if (client->irq <= 0)
> + /*
> + * When using device firmware we either take the IRQ specified directly
> + * or probe for a pin named BQ24257_STAT_IRQ. In case of using platform
> + * data always run the IRQ pin probe function to finish IRQ and GPIO
> + * setup based on the stat pin specified in the platform data.
> + */
Why?
> + if (client->irq <= 0 || pdata)
> client->irq = bq24257_irq_probe(bq);
>
> if (client->irq < 0) {
> diff --git a/include/linux/power/bq24257_charger.h
> b/include/linux/power/bq24257_charger.h
> new file mode 100644
> index 0000000..d4f3703
> --- /dev/null
> +++ b/include/linux/power/bq24257_charger.h
> @@ -0,0 +1,29 @@
> +/*
> + * Platform data for the TI bq24257 battery charger driver.
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 as
> + * published by the Free Software Foundation.
> + */
> +
> +#ifndef _BQ24257_CHARGER_H_
> +#define _BQ24257_CHARGER_H_
> +
> +#include <asm/types.h>
> +#include <linux/types.h>
> +
> +struct bq24257_platform_data {
> + u32 ichg; /* charge current (uA) */
> + u32 vbat; /* regulation voltage (uV) */
> + u32 iterm; /* termination current (uA) */
> + u32 in_ilimit; /* input current limit (uA) */
> + u32 vovp; /* over voltage protection voltage (uV) */
> + u32 vindpm; /* VDMP input threshold voltage (uV) */
> + bool in_ilimit_autoset_disable; /* auto-detect of input current limit */
> + bool pg_gpio_disable; /* use of a dedicated pin for Power Good */
> +
> + int stat_gpio; /* stat_int (interrupt) pin */
> + int pg_gpio; /* power good pin */
> +};
> +
> +#endif
#endif /* _BQ24257_CHARGER_H_ */
Best regards,
Krzysztof
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