Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 0c95706d authored by Subbaraman Narayanamurthy's avatar Subbaraman Narayanamurthy
Browse files

power: smb1351-charger: add support for reading charger version 



Add support to read the charger version whether it is SMB1350 or
SMB1351. This is needed to set different parameters based on the
chip version.

Change-Id: Ifc3569bc9973ca38081ecbdb7ab0cba52faa261e
Signed-off-by: default avatarSubbaraman Narayanamurthy <subbaram@codeaurora.org>
parent 0ff24e8b

drivers/power/smb1351-charger.c

+54 −2
Original line number Diff line number Diff line
@@ -216,6 +216,9 @@ 
#define AFVC_OVERRIDE_BIT			BIT(1)

#define SYSOK_PIN_CONFIG_BIT			BIT(0)



#define VERSION_REG				0x2E

#define VERSION_MASK				BIT(1)



/* Command registers */

#define CMD_I2C_REG				0x30

#define CMD_RELOAD_BIT				BIT(7)
@@ -408,6 +411,19 @@ struct smb1351_regulator { 
	struct regulator_dev	*rdev;

};



enum chip_version {

	SMB_UNKNOWN = 0,

	SMB1350,

	SMB1351,

	SMB_MAX_TYPE,

};



static const char *smb1351_version_str[SMB_MAX_TYPE] = {

	[SMB_UNKNOWN] = "Unknown",

	[SMB1350] = "SMB1350",

	[SMB1351] = "SMB1351",

};



struct smb1351_charger {

	struct i2c_client	*client;

	struct device		*dev;
@@ -450,6 +466,7 @@ struct smb1351_charger { 
	bool			usbin_ov;

	bool			chg_remove_work_scheduled;

	bool			force_hvdcp_2p0;

	enum chip_version	version;



	/* psy */

	struct power_supply	*usb_psy;
@@ -877,6 +894,28 @@ static int smb1351_regulator_init(struct smb1351_charger *chip) 
	return rc;

}



static int smb_chip_get_version(struct smb1351_charger *chip)

{

	u8 ver;

	int rc = 0;



	if (chip->version == SMB_UNKNOWN) {

		rc = smb1351_read_reg(chip, VERSION_REG, &ver);

		if (rc) {

			pr_err("Couldn't read version rc=%d\n", rc);

			return rc;

		}



		/* If bit 1 is set, it is SMB1350 */

		if (ver & VERSION_MASK)

			chip->version = SMB1350;

		else

			chip->version = SMB1351;

	}



	return rc;

}



static int smb1351_hw_init(struct smb1351_charger *chip)

{

	int rc;
@@ -903,6 +942,12 @@ static int smb1351_hw_init(struct smb1351_charger *chip) 
		return 0;

	}



	rc = smb_chip_get_version(chip);

	if (rc) {

		pr_err("Couldn't get version rc = %d\n", rc);

		return rc;

	}



	rc = smb1351_enable_volatile_writes(chip);

	if (rc) {

		pr_err("Couldn't configure volatile writes rc=%d\n", rc);
@@ -1395,6 +1440,12 @@ static int smb1351_parallel_set_chg_present(struct smb1351_charger *chip, 
			return -ENODEV;

		}



		rc = smb_chip_get_version(chip);

		if (rc) {

			pr_err("Couldn't get version rc = %d\n", rc);

			return rc;

		}



		rc = smb1351_enable_volatile_writes(chip);

		if (rc) {

			pr_err("Couldn't configure for volatile rc = %d\n", rc);
@@ -2987,9 +3038,10 @@ static int smb1351_main_charger_probe(struct i2c_client *client, 


	dump_regs(chip);



	pr_info("smb1351 successfully probed. charger=%d, batt=%d\n",

	pr_info("smb1351 successfully probed. charger=%d, batt=%d version=%s\n",

			chip->chg_present,

			smb1351_get_prop_batt_present(chip));

			smb1351_get_prop_batt_present(chip),

			smb1351_version_str[chip->version]);

	return 0;



fail_smb1351_hw_init: