| Message ID | 20210423145543.d007e8aa9bd2fc91dc51caa5@uvos.xyz (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [v2,1/2] power: supply: cpcap-battery: Add battery type auto detection for mapphone devices | expand |
Hi, * Carl Philipp Klemm <philipp@uvos.xyz> [210423 12:55]: > +static void cpcap_battery_detect_battery_type(struct cpcap_battery_ddata *ddata) > +{ > + struct nvmem_device *nvmem; > + u8 battery_id = 0; > + > + ddata->check_nvmem = false; > + > + nvmem = nvmem_device_find(NULL, &cpcap_battery_match_nvmem); > + if (IS_ERR_OR_NULL(nvmem)) { > + ddata->check_nvmem = true; > + if (!ddata->no_nvmem_warned) { > + dev_info(ddata->dev, "Can not find battery nvmem device. Assuming generic lipo battery\n"); > + ddata->no_nvmem_warned = true; > + } Folks are also using the device with no battery at all to have it directly connected to the power supply. This is handy for remotely power cycling the device, and also for measuring power consumption with a bench power supply. So by default I think we should continue assuming no battery is inserted rather than assume a generic battery is inserted. How about require configuring the undetected battery parameters via /sys/class/power_supply to indicate a non-standard battery is inserted? At least battery type, capacity, and voltage can depend on the generic battery inserted. Other than that, the NVRAM changes look nice to me. Regards, Tony
Hi, On Fri, Apr 23, 2021 at 02:55:43PM +0200, Carl Philipp Klemm wrote: > This allows cpcap-battery to detect whitch battery is inserted, HW4X or BW8X for > xt875 and EB41 for xt894 by examining the battery nvmem. If no known battery is > detected sane defaults are used. > > Signed-off-by: Carl Philipp Klemm <philipp@uvos.xyz> > --- > drivers/power/supply/cpcap-battery.c | 131 ++++++++++++++++++++------- > 1 file changed, 98 insertions(+), 33 deletions(-) > > diff --git a/drivers/power/supply/cpcap-battery.c b/drivers/power/supply/cpcap-battery.c > index 6d5bcdb9f45d..386d269e699f 100644 > --- a/drivers/power/supply/cpcap-battery.c > +++ b/drivers/power/supply/cpcap-battery.c > @@ -28,6 +28,7 @@ > #include <linux/power_supply.h> > #include <linux/reboot.h> > #include <linux/regmap.h> > +#include <linux/nvmem-consumer.h> You need to squash PATCH 2/2 into this patch. The kernel tree should be bisectable and this patch adds the requirement for NVMEM. > #include <linux/moduleparam.h> > > #include <linux/iio/consumer.h> > @@ -73,6 +74,9 @@ > > #define CPCAP_BATTERY_CC_SAMPLE_PERIOD_MS 250 > > +#define CPCAP_BATTERY_EB41_HW4X_ID 0x9E > +#define CPCAP_BATTERY_BW8X_ID 0x98 > + > enum { > CPCAP_BATTERY_IIO_BATTDET, > CPCAP_BATTERY_IIO_VOLTAGE, > @@ -97,6 +101,7 @@ struct cpcap_interrupt_desc { > > struct cpcap_battery_config { > int cd_factor; > + char id; id is unused? > struct power_supply_info info; > struct power_supply_battery_info bat; > }; > @@ -138,6 +143,8 @@ struct cpcap_battery_ddata { > int charge_full; > int status; > u16 vendor; > + bool check_nvmem; > + bool no_nvmem_warned; > unsigned int is_full:1; > }; > > @@ -354,6 +361,91 @@ cpcap_battery_read_accumulated(struct cpcap_battery_ddata *ddata, > ccd->offset); > } > > + > +/* > + * Based on the values from Motorola mapphone Linux kernel for the > + * stock Droid 4 battery eb41. In the Motorola mapphone Linux > + * kernel tree the value for pm_cd_factor is passed to the kernel > + * via device tree. If it turns out to be something device specific > + * we can consider that too later. These values are also fine for > + * Bionic's hw4x. > + * > + * And looking at the battery full and shutdown values for the stock > + * kernel on droid 4, full is 4351000 and software initiates shutdown > + * at 3078000. The device will die around 2743000. > + */ > +static const struct cpcap_battery_config cpcap_battery_eb41_data = { > + .cd_factor = 0x3cc, > + .info.technology = POWER_SUPPLY_TECHNOLOGY_LION, > + .info.voltage_max_design = 4351000, > + .info.voltage_min_design = 3100000, > + .info.charge_full_design = 1740000, > + .bat.constant_charge_voltage_max_uv = 4200000, > +}; > + > +/* Values for the extended Droid Bionic battery bw8x. */ > +static const struct cpcap_battery_config cpcap_battery_bw8x_data = { > + .cd_factor = 0x3cc, > + .info.technology = POWER_SUPPLY_TECHNOLOGY_LION, > + .info.voltage_max_design = 4200000, > + .info.voltage_min_design = 3200000, > + .info.charge_full_design = 2760000, > + .bat.constant_charge_voltage_max_uv = 4200000, > +}; > + > +/* > + * Safe values for any lipo battery likely to fit into a mapphone > + * battery bay. > + */ > +static const struct cpcap_battery_config cpcap_battery_unkown_data = { > + .cd_factor = 0x3cc, > + .info.technology = POWER_SUPPLY_TECHNOLOGY_LION, > + .info.voltage_max_design = 4200000, > + .info.voltage_min_design = 3200000, > + .info.charge_full_design = 3000000, > + .bat.constant_charge_voltage_max_uv = 4200000, > +}; > + > +static int cpcap_battery_match_nvmem(struct device *dev, const void *data) > +{ > + if (strcmp(dev_name(dev), "89-500029ba0f73") == 0) > + return 1; > + else > + return 0; > +} > + > +static void cpcap_battery_detect_battery_type(struct cpcap_battery_ddata *ddata) > +{ > + struct nvmem_device *nvmem; > + u8 battery_id = 0; > + > + ddata->check_nvmem = false; > + > + nvmem = nvmem_device_find(NULL, &cpcap_battery_match_nvmem); > + if (IS_ERR_OR_NULL(nvmem)) { > + ddata->check_nvmem = true; > + if (!ddata->no_nvmem_warned) { > + dev_info(ddata->dev, "Can not find battery nvmem device. Assuming generic lipo battery\n"); > + ddata->no_nvmem_warned = true; > + } Please use dev_info_once() and drop no_nvmem_warned. > + } else if (nvmem_device_read(nvmem, 2, 1, &battery_id) < 0) { > + battery_id = 0; > + ddata->check_nvmem = true; > + dev_warn(ddata->dev, "Can not read battery nvmem device. Assuming generic lipo battery\n"); > + } > + > + switch (battery_id) { > + case CPCAP_BATTERY_EB41_HW4X_ID: > + memcpy(&ddata->config, &cpcap_battery_eb41_data, sizeof(ddata->config)); > + break; > + case CPCAP_BATTERY_BW8X_ID: > + memcpy(&ddata->config, &cpcap_battery_bw8x_data, sizeof(ddata->config)); > + break; > + default: > + memcpy(&ddata->config, &cpcap_battery_unkown_data, sizeof(ddata->config)); > + } No need to use memcpy, you can just assign the struct and get free type checking, e.g.: ddata->config = cpcap_battery_eb41_data; > +} > + > /** > * cpcap_battery_cc_get_avg_current - read cpcap coulumb counter > * @ddata: cpcap battery driver device data > @@ -571,6 +663,9 @@ static int cpcap_battery_get_property(struct power_supply *psy, > latest = cpcap_battery_latest(ddata); > previous = cpcap_battery_previous(ddata); > > + if (ddata->check_nvmem) > + cpcap_battery_detect_battery_type(ddata); > + > switch (psp) { > case POWER_SUPPLY_PROP_PRESENT: > if (latest->temperature > CPCAP_NO_BATTERY || ignore_temperature_probe) > @@ -969,30 +1064,10 @@ static int cpcap_battery_calibrate(struct cpcap_battery_ddata *ddata) > return error; > } > > -/* > - * Based on the values from Motorola mapphone Linux kernel. In the > - * the Motorola mapphone Linux kernel tree the value for pm_cd_factor > - * is passed to the kernel via device tree. If it turns out to be > - * something device specific we can consider that too later. > - * > - * And looking at the battery full and shutdown values for the stock > - * kernel on droid 4, full is 4351000 and software initiates shutdown > - * at 3078000. The device will die around 2743000. > - */ > -static const struct cpcap_battery_config cpcap_battery_default_data = { > - .cd_factor = 0x3cc, > - .info.technology = POWER_SUPPLY_TECHNOLOGY_LION, > - .info.voltage_max_design = 4351000, > - .info.voltage_min_design = 3100000, > - .info.charge_full_design = 1740000, > - .bat.constant_charge_voltage_max_uv = 4200000, > -}; > - > #ifdef CONFIG_OF > static const struct of_device_id cpcap_battery_id_table[] = { > { > .compatible = "motorola,cpcap-battery", > - .data = &cpcap_battery_default_data, > }, > {}, > }; > @@ -1010,31 +1085,21 @@ static const struct power_supply_desc cpcap_charger_battery_desc = { > .external_power_changed = cpcap_battery_external_power_changed, > }; > > + spurious newline. > static int cpcap_battery_probe(struct platform_device *pdev) > { > struct cpcap_battery_ddata *ddata; > - const struct of_device_id *match; > struct power_supply_config psy_cfg = {}; > int error; > > - match = of_match_device(of_match_ptr(cpcap_battery_id_table), > - &pdev->dev); > - if (!match) > - return -EINVAL; > - > - if (!match->data) { > - dev_err(&pdev->dev, "no configuration data found\n"); > - > - return -ENODEV; > - } > - > ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL); > if (!ddata) > return -ENOMEM; > > + cpcap_battery_detect_battery_type(ddata); > + > INIT_LIST_HEAD(&ddata->irq_list); > ddata->dev = &pdev->dev; > - memcpy(&ddata->config, match->data, sizeof(ddata->config)); > > ddata->reg = dev_get_regmap(ddata->dev->parent, NULL); > if (!ddata->reg) Otherwise LGTM. -- Sebastian
diff --git a/drivers/power/supply/cpcap-battery.c b/drivers/power/supply/cpcap-battery.c index 6d5bcdb9f45d..386d269e699f 100644 --- a/drivers/power/supply/cpcap-battery.c +++ b/drivers/power/supply/cpcap-battery.c @@ -28,6 +28,7 @@ #include <linux/power_supply.h> #include <linux/reboot.h> #include <linux/regmap.h> +#include <linux/nvmem-consumer.h> #include <linux/moduleparam.h> #include <linux/iio/consumer.h> @@ -73,6 +74,9 @@ #define CPCAP_BATTERY_CC_SAMPLE_PERIOD_MS 250 +#define CPCAP_BATTERY_EB41_HW4X_ID 0x9E +#define CPCAP_BATTERY_BW8X_ID 0x98 + enum { CPCAP_BATTERY_IIO_BATTDET, CPCAP_BATTERY_IIO_VOLTAGE, @@ -97,6 +101,7 @@ struct cpcap_interrupt_desc { struct cpcap_battery_config { int cd_factor; + char id; struct power_supply_info info; struct power_supply_battery_info bat; }; @@ -138,6 +143,8 @@ struct cpcap_battery_ddata { int charge_full; int status; u16 vendor; + bool check_nvmem; + bool no_nvmem_warned; unsigned int is_full:1; }; @@ -354,6 +361,91 @@ cpcap_battery_read_accumulated(struct cpcap_battery_ddata *ddata, ccd->offset); } + +/* + * Based on the values from Motorola mapphone Linux kernel for the + * stock Droid 4 battery eb41. In the Motorola mapphone Linux + * kernel tree the value for pm_cd_factor is passed to the kernel + * via device tree. If it turns out to be something device specific + * we can consider that too later. These values are also fine for + * Bionic's hw4x. + * + * And looking at the battery full and shutdown values for the stock + * kernel on droid 4, full is 4351000 and software initiates shutdown + * at 3078000. The device will die around 2743000. + */ +static const struct cpcap_battery_config cpcap_battery_eb41_data = { + .cd_factor = 0x3cc, + .info.technology = POWER_SUPPLY_TECHNOLOGY_LION, + .info.voltage_max_design = 4351000, + .info.voltage_min_design = 3100000, + .info.charge_full_design = 1740000, + .bat.constant_charge_voltage_max_uv = 4200000, +}; + +/* Values for the extended Droid Bionic battery bw8x. */ +static const struct cpcap_battery_config cpcap_battery_bw8x_data = { + .cd_factor = 0x3cc, + .info.technology = POWER_SUPPLY_TECHNOLOGY_LION, + .info.voltage_max_design = 4200000, + .info.voltage_min_design = 3200000, + .info.charge_full_design = 2760000, + .bat.constant_charge_voltage_max_uv = 4200000, +}; + +/* + * Safe values for any lipo battery likely to fit into a mapphone + * battery bay. + */ +static const struct cpcap_battery_config cpcap_battery_unkown_data = { + .cd_factor = 0x3cc, + .info.technology = POWER_SUPPLY_TECHNOLOGY_LION, + .info.voltage_max_design = 4200000, + .info.voltage_min_design = 3200000, + .info.charge_full_design = 3000000, + .bat.constant_charge_voltage_max_uv = 4200000, +}; + +static int cpcap_battery_match_nvmem(struct device *dev, const void *data) +{ + if (strcmp(dev_name(dev), "89-500029ba0f73") == 0) + return 1; + else + return 0; +} + +static void cpcap_battery_detect_battery_type(struct cpcap_battery_ddata *ddata) +{ + struct nvmem_device *nvmem; + u8 battery_id = 0; + + ddata->check_nvmem = false; + + nvmem = nvmem_device_find(NULL, &cpcap_battery_match_nvmem); + if (IS_ERR_OR_NULL(nvmem)) { + ddata->check_nvmem = true; + if (!ddata->no_nvmem_warned) { + dev_info(ddata->dev, "Can not find battery nvmem device. Assuming generic lipo battery\n"); + ddata->no_nvmem_warned = true; + } + } else if (nvmem_device_read(nvmem, 2, 1, &battery_id) < 0) { + battery_id = 0; + ddata->check_nvmem = true; + dev_warn(ddata->dev, "Can not read battery nvmem device. Assuming generic lipo battery\n"); + } + + switch (battery_id) { + case CPCAP_BATTERY_EB41_HW4X_ID: + memcpy(&ddata->config, &cpcap_battery_eb41_data, sizeof(ddata->config)); + break; + case CPCAP_BATTERY_BW8X_ID: + memcpy(&ddata->config, &cpcap_battery_bw8x_data, sizeof(ddata->config)); + break; + default: + memcpy(&ddata->config, &cpcap_battery_unkown_data, sizeof(ddata->config)); + } +} + /** * cpcap_battery_cc_get_avg_current - read cpcap coulumb counter * @ddata: cpcap battery driver device data @@ -571,6 +663,9 @@ static int cpcap_battery_get_property(struct power_supply *psy, latest = cpcap_battery_latest(ddata); previous = cpcap_battery_previous(ddata); + if (ddata->check_nvmem) + cpcap_battery_detect_battery_type(ddata); + switch (psp) { case POWER_SUPPLY_PROP_PRESENT: if (latest->temperature > CPCAP_NO_BATTERY || ignore_temperature_probe) @@ -969,30 +1064,10 @@ static int cpcap_battery_calibrate(struct cpcap_battery_ddata *ddata) return error; } -/* - * Based on the values from Motorola mapphone Linux kernel. In the - * the Motorola mapphone Linux kernel tree the value for pm_cd_factor - * is passed to the kernel via device tree. If it turns out to be - * something device specific we can consider that too later. - * - * And looking at the battery full and shutdown values for the stock - * kernel on droid 4, full is 4351000 and software initiates shutdown - * at 3078000. The device will die around 2743000. - */ -static const struct cpcap_battery_config cpcap_battery_default_data = { - .cd_factor = 0x3cc, - .info.technology = POWER_SUPPLY_TECHNOLOGY_LION, - .info.voltage_max_design = 4351000, - .info.voltage_min_design = 3100000, - .info.charge_full_design = 1740000, - .bat.constant_charge_voltage_max_uv = 4200000, -}; - #ifdef CONFIG_OF static const struct of_device_id cpcap_battery_id_table[] = { { .compatible = "motorola,cpcap-battery", - .data = &cpcap_battery_default_data, }, {}, }; @@ -1010,31 +1085,21 @@ static const struct power_supply_desc cpcap_charger_battery_desc = { .external_power_changed = cpcap_battery_external_power_changed, }; + static int cpcap_battery_probe(struct platform_device *pdev) { struct cpcap_battery_ddata *ddata; - const struct of_device_id *match; struct power_supply_config psy_cfg = {}; int error; - match = of_match_device(of_match_ptr(cpcap_battery_id_table), - &pdev->dev); - if (!match) - return -EINVAL; - - if (!match->data) { - dev_err(&pdev->dev, "no configuration data found\n"); - - return -ENODEV; - } - ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL); if (!ddata) return -ENOMEM; + cpcap_battery_detect_battery_type(ddata); + INIT_LIST_HEAD(&ddata->irq_list); ddata->dev = &pdev->dev; - memcpy(&ddata->config, match->data, sizeof(ddata->config)); ddata->reg = dev_get_regmap(ddata->dev->parent, NULL); if (!ddata->reg)
This allows cpcap-battery to detect whitch battery is inserted, HW4X or BW8X for xt875 and EB41 for xt894 by examining the battery nvmem. If no known battery is detected sane defaults are used. Signed-off-by: Carl Philipp Klemm <philipp@uvos.xyz> --- drivers/power/supply/cpcap-battery.c | 131 ++++++++++++++++++++------- 1 file changed, 98 insertions(+), 33 deletions(-)