Hi Antoine, Am Mon, Dec 02, 2024 at 02:07:15PM +0100 schrieb Thomas Antoine via B4 Relay: > From: Thomas Antoine <t.antoine@xxxxxxxxxxxx> > > The Maxim max77759 fuel gauge has the same interface as the Maxim max1720x > except for the non-volatile memory slave address which is not available. > No slave is available at address 0xb of the i2c bus, which is coherent > with the following driver from google: line 5836 disables non-volatile > memory for m5 gauge. > > Link: https://android.googlesource.com/kernel/google-modules/bms/+/1a68c36bef474573cc8629cc1d121eb6a81ab68c/max1720x_battery.c > > Add support for the max77759 by allowing to use the non-volatile > memory or not based on the chip. Value for RSense comes from the following > stock devicetree: > > Link: https://android.googlesource.com/kernel/devices/google/gs101/+/33eca36d43da6c2b6a546806eb3e7411bbe6d60d/dts/gs101-raviole-battery.dtsi > > Signed-off-by: Thomas Antoine <t.antoine@xxxxxxxxxxxx> > --- > drivers/power/supply/max1720x_battery.c | 71 +++++++++++++++++++++++++++------ > 1 file changed, 59 insertions(+), 12 deletions(-) > > diff --git a/drivers/power/supply/max1720x_battery.c b/drivers/power/supply/max1720x_battery.c > index 33105419e2427bb37963bda9948b647c239f8faa..faf336938dd4306dd2ceeb0a84b90ca80ad41a9f 100644 > --- a/drivers/power/supply/max1720x_battery.c > +++ b/drivers/power/supply/max1720x_battery.c > @@ -13,6 +13,7 @@ > #include <linux/nvmem-provider.h> > #include <linux/power_supply.h> > #include <linux/regmap.h> > +#include <linux/types.h> > No need to include it, it is done by <linux/i2.c> which includes <linux/device.h> which includes <linux/types.h> > #include <linux/unaligned.h> > > @@ -39,6 +40,7 @@ > #define MAX172XX_DEV_NAME_TYPE_MASK GENMASK(3, 0) > #define MAX172XX_DEV_NAME_TYPE_MAX17201 BIT(0) > #define MAX172XX_DEV_NAME_TYPE_MAX17205 (BIT(0) | BIT(2)) > +#define MAX172XX_DEV_NAME_TYPE_MAX77759 0 > #define MAX172XX_QR_TABLE10 0x22 > #define MAX172XX_BATT 0xDA /* Battery voltage */ > #define MAX172XX_ATAVCAP 0xDF > @@ -46,6 +48,7 @@ > static const char *const max1720x_manufacturer = "Maxim Integrated"; > static const char *const max17201_model = "MAX17201"; > static const char *const max17205_model = "MAX17205"; > +static const char *const max77759_model = "MAX77759"; > > struct max1720x_device_info { > struct regmap *regmap; > @@ -54,6 +57,21 @@ struct max1720x_device_info { > int rsense; > }; > > +struct chip_data { > + u16 default_nrsense; /* in regs in 10^-5 */ > + u8 has_nvmem; > +}; > + > +static const struct chip_data max1720x_data = { > + .default_nrsense = 1000, > + .has_nvmem = 1, > +}; > + > +static const struct chip_data max77759_data = { > + .default_nrsense = 500, > + .has_nvmem = 0, > +}; > + You can get rid of chip_data by reading rsense from DT and moving has_nvmem to max1720x_device_info. By doing so you don't have to rely on default values. Either it is specified by DT or by rsense value in nvmem. Best regards, Dimitri Fedrau
