| Message ID | MWHPR11MB19659276002CE27A5E36DAD2FD540@MWHPR11MB1965.namprd11.prod.outlook.com (mailing list archive) |
|---|---|
| State | Changes Requested |
| Headers | show |
| Series | [v2] hwmon (pmbus/max20730): add device monitoring via debugfs | expand |
On Wed, Aug 26, 2020 at 09:06:04PM +0000, Ugur Usug wrote: > Add debugfs interface support for accessing device specific registers (MFR_VOUT_MIN, MFR_DEVSET1 and MFR_DEVSET2) and others including OPERATION, ON_OFF_CONFIG, SMB_ALERT_MASK, VOUT_MODE, VOUT_COMMAND and VOUT_MAX. > > Signed-off-by: Ugur Usug <ugur.usug@maximintegrated.com> Please run checkpatch --strict and fix what it reports; mostly continuation alignment issues. > --- > drivers/hwmon/pmbus/max20730.c | 364 ++++++++++++++++++++++++++++++++++++++++- > 1 file changed, 363 insertions(+), 1 deletion(-) > > diff --git a/drivers/hwmon/pmbus/max20730.c b/drivers/hwmon/pmbus/max20730.c > index a151a2b..aa5e2be 100644 > --- a/drivers/hwmon/pmbus/max20730.c > +++ b/drivers/hwmon/pmbus/max20730.c > @@ -8,6 +8,7 @@ > */ > > #include <linux/bits.h> > +#include <linux/debugfs.h> > #include <linux/err.h> > #include <linux/i2c.h> > #include <linux/init.h> > @@ -26,16 +27,368 @@ enum chips { > max20743 > }; > > +enum { > + MAX20730_DEBUGFS_VOUT_MIN = 0, > + MAX20730_DEBUGFS_FREQUENCY, > + MAX20730_DEBUGFS_PG_DELAY, > + MAX20730_DEBUGFS_INTERNAL_GAIN, > + MAX20730_DEBUGFS_BOOT_VOLTAGE, > + MAX20730_DEBUGFS_OUT_V_RAMP_RATE, > + MAX20730_DEBUGFS_OC_PROTECT_MODE, > + MAX20730_DEBUGFS_SS_TIMING, > + MAX20730_DEBUGFS_IMAX, > + MAX20730_DEBUGFS_OPERATION, > + MAX20730_DEBUGFS_ON_OFF_CONFIG, > + MAX20730_DEBUGFS_SMBALERT_MASK, > + MAX20730_DEBUGFS_VOUT_MODE, > + MAX20730_DEBUGFS_VOUT_COMMAND, > + MAX20730_DEBUGFS_VOUT_MAX, > + MAX20730_DEBUGFS_NUM_ENTRIES > +}; > + > struct max20730_data { > enum chips id; > struct pmbus_driver_info info; > struct mutex lock; /* Used to protect against parallel writes */ > u16 mfr_devset1; > + u16 mfr_devset2; > + u16 mfr_voutmin; > }; > > #define to_max20730_data(x) container_of(x, struct max20730_data, info) > > +#define PMBUS_SMB_ALERT_MASK 0x1B > + > +#define MAX20730_MFR_VOUT_MIN 0xd1 > #define MAX20730_MFR_DEVSET1 0xd2 > +#define MAX20730_MFR_DEVSET2 0xd3 > + > +#define MAX20730_MFR_VOUT_MIN_MASK GENMASK(9, 0) > +#define MAX20730_MFR_VOUT_MIN_BIT_POS 0 > + > +#define MAX20730_MFR_DEVSET1_RGAIN_MASK (BIT(13) | BIT(14)) > +#define MAX20730_MFR_DEVSET1_OTP_MASK (BIT(11) | BIT(12)) > +#define MAX20730_MFR_DEVSET1_VBOOT_MASK (BIT(8) | BIT(9)) > +#define MAX20730_MFR_DEVSET1_OCP_MASK (BIT(5) | BIT(6)) > +#define MAX20730_MFR_DEVSET1_FSW_MASK GENMASK(4, 2) > +#define MAX20730_MFR_DEVSET1_TSTAT_MASK (BIT(0) | BIT(1)) > + > +#define MAX20730_MFR_DEVSET1_RGAIN_BIT_POS 13 > +#define MAX20730_MFR_DEVSET1_OTP_BIT_POS 11 > +#define MAX20730_MFR_DEVSET1_VBOOT_BIT_POS 8 > +#define MAX20730_MFR_DEVSET1_OCP_BIT_POS 5 > +#define MAX20730_MFR_DEVSET1_FSW_BIT_POS 2 > +#define MAX20730_MFR_DEVSET1_TSTAT_BIT_POS 0 > + > +#define MAX20730_MFR_DEVSET2_IMAX_MASK GENMASK(10, 8) > +#define MAX20730_MFR_DEVSET2_VRATE (BIT(6) | BIT(7)) > +#define MAX20730_MFR_DEVSET2_OCPM_MASK BIT(5) > +#define MAX20730_MFR_DEVSET2_SS_MASK (BIT(0) | BIT(1)) > + > +#define MAX20730_MFR_DEVSET2_IMAX_BIT_POS 8 > +#define MAX20730_MFR_DEVSET2_VRATE_BIT_POS 6 > +#define MAX20730_MFR_DEVSET2_OCPM_BIT_POS 5 > +#define MAX20730_MFR_DEVSET2_SS_BIT_POS 0 > + > +#define DEBUG_FS_DATA_MAX 8 > + > +struct max20730_debugfs_data { > + struct i2c_client *client; > + int debugfs_entries[MAX20730_DEBUGFS_NUM_ENTRIES]; > +}; > + > +#define to_psu(x, y) container_of((x), \ > + struct max20730_debugfs_data, debugfs_entries[(y)]) > + > +#ifdef CONFIG_DEBUG_FS > +static ssize_t max20730_debugfs_read(struct file *file, char __user *buf, > + size_t count, loff_t *ppos) > +{ > + int ret, len; > + int *idxp = file->private_data; > + int idx = *idxp; > + struct max20730_debugfs_data *psu = to_psu(idxp, idx); > + const struct pmbus_driver_info *info; > + const struct max20730_data *data; > + char tbuf[DEBUG_FS_DATA_MAX + 2] = { 0 }; > + u16 val; > + > + info = pmbus_get_driver_info(psu->client); > + data = to_max20730_data(info); > + > + switch (idx) { > + case MAX20730_DEBUGFS_VOUT_MIN: > + len = snprintf(tbuf, 5, "%d", data->mfr_voutmin); Do you really want to report raw numbers here ? > + break; > + case MAX20730_DEBUGFS_FREQUENCY: > + val = (data->mfr_devset1 & MAX20730_MFR_DEVSET1_FSW_MASK) > + >> MAX20730_MFR_DEVSET1_FSW_BIT_POS; > + if (val == 0) > + ret = 400; > + else if (val == 1) > + ret = 500; > + else if (val == 2 || val == 3) > + ret = 600; > + else if (val == 4) > + ret = 700; > + else if (val == 5) > + ret = 800; > + else > + ret = 900; > + len = snprintf(tbuf, 4, "%d", ret); > + break; > + case MAX20730_DEBUGFS_PG_DELAY: > + val = (data->mfr_devset1 & MAX20730_MFR_DEVSET1_TSTAT_MASK) > + >> MAX20730_MFR_DEVSET1_TSTAT_BIT_POS; > + > + if (val == 0) > + strcpy(tbuf, "2000"); > + else if (val == 1) > + strcpy(tbuf, "125"); > + else if (val == 2) > + strcpy(tbuf, "62.5"); > + else > + strcpy(tbuf, "32"); > + len = strnlen(tbuf, DEBUG_FS_DATA_MAX); FWIW, strnlen() is kind of odd here, especially since strlcpy() or similar was not used above. Same everywhere else, really. > + break; > + > + case MAX20730_DEBUGFS_INTERNAL_GAIN: > + val = (data->mfr_devset1 & MAX20730_MFR_DEVSET1_RGAIN_MASK) > + >> MAX20730_MFR_DEVSET1_RGAIN_BIT_POS; > + > + if (data->id == max20734) { > + /* AN6209 */ > + if (val == 0) > + strcpy(tbuf, "0.8"); > + else if (val == 1) > + strcpy(tbuf, "3.2"); > + else if (val == 2) > + strcpy(tbuf, "1.6"); > + else > + strcpy(tbuf, "6.4"); > + } else if (data->id == max20730 || data->id == max20710) { > + /* AN6042 or AN6140 */ > + if (val == 0) > + strcpy(tbuf, "0.9"); > + else if (val == 1) > + strcpy(tbuf, "3.6"); > + else if (val == 2) > + strcpy(tbuf, "1.8"); > + else > + strcpy(tbuf, "7.2"); > + } else if (data->id == max20743) { > + /* AN6042 */ > + if (val == 0) > + strcpy(tbuf, "0.45"); > + else if (val == 1) > + strcpy(tbuf, "1.8"); > + else if (val == 2) > + strcpy(tbuf, "0.9"); > + else > + strcpy(tbuf, "3.6"); > + } else > + return -EINVAL; Missing { } in the last else branch. Also, I would suggest to return a string such as "Invalid", not an error. -EINVAL is at the very least confusing here; the user did not do anything wrong. The same applies to other -EINVAL return values. > + > + len = strnlen(tbuf, DEBUG_FS_DATA_MAX); > + break; > + case MAX20730_DEBUGFS_BOOT_VOLTAGE: > + val = (data->mfr_devset1 & MAX20730_MFR_DEVSET1_VBOOT_MASK) > + >> MAX20730_MFR_DEVSET1_VBOOT_BIT_POS; > + > + if (val == 0) > + strcpy(tbuf, "0.6484"); > + else if (val == 1) > + strcpy(tbuf, "0.8984"); > + else if (val == 2) > + strcpy(tbuf, "1.0"); > + else > + return -EINVAL; > + > + len = strnlen(tbuf, DEBUG_FS_DATA_MAX); > + break; > + case MAX20730_DEBUGFS_OUT_V_RAMP_RATE: > + val = (data->mfr_devset2 & MAX20730_MFR_DEVSET2_VRATE) > + >> MAX20730_MFR_DEVSET2_VRATE_BIT_POS; > + > + if (val == 0) > + ret = 4; > + else if (val == 1) > + ret = 2; > + else if (val == 2) > + ret = 1; > + else > + return -EINVAL; > + > + len = snprintf(tbuf, 2, "%d", ret); > + break; > + case MAX20730_DEBUGFS_OC_PROTECT_MODE: > + ret = (data->mfr_devset2 & MAX20730_MFR_DEVSET2_OCPM_MASK) > + >> MAX20730_MFR_DEVSET2_OCPM_BIT_POS; > + len = snprintf(tbuf, 2, "%d", ret); > + break; > + case MAX20730_DEBUGFS_SS_TIMING: > + val = (data->mfr_devset2 & MAX20730_MFR_DEVSET2_SS_MASK) > + >> MAX20730_MFR_DEVSET2_SS_BIT_POS; > + > + if (val == 0) > + strcpy(tbuf, "0.75"); > + else if (val == 1) > + strcpy(tbuf, "1.5"); > + else if (val == 2) > + strcpy(tbuf, "3"); > + else > + strcpy(tbuf, "6"); > + > + len = strnlen(tbuf, DEBUG_FS_DATA_MAX); > + break; > + case MAX20730_DEBUGFS_IMAX: > + ret = (data->mfr_devset2 & MAX20730_MFR_DEVSET2_IMAX_MASK) > + >> MAX20730_MFR_DEVSET2_IMAX_BIT_POS; > + len = snprintf(tbuf, 2, "%d", ret); > + break; > + case MAX20730_DEBUGFS_OPERATION: > + ret = i2c_smbus_read_byte_data(psu->client, PMBUS_OPERATION); > + if (ret < 0) > + return ret; > + len = snprintf(tbuf, 2, "%d", ret); > + break; > + case MAX20730_DEBUGFS_ON_OFF_CONFIG: > + ret = i2c_smbus_read_byte_data(psu->client, PMBUS_ON_OFF_CONFIG); > + if (ret < 0) > + return ret; > + len = snprintf(tbuf, 2, "%d", ret); > + break; > + case MAX20730_DEBUGFS_SMBALERT_MASK: > + ret = i2c_smbus_read_word_data(psu->client, > + PMBUS_SMB_ALERT_MASK); > + if (ret < 0) > + return ret; > + len = snprintf(tbuf, 3, "%d", ret); > + break; > + case MAX20730_DEBUGFS_VOUT_MODE: > + ret = i2c_smbus_read_byte_data(psu->client, PMBUS_VOUT_MODE); > + if (ret < 0) > + return ret; > + len = snprintf(tbuf, 2, "%d", ret); > + break; > + case MAX20730_DEBUGFS_VOUT_COMMAND: > + ret = i2c_smbus_read_word_data(psu->client, PMBUS_VOUT_COMMAND); > + if (ret < 0) > + return ret; > + len = snprintf(tbuf, 3, "%d", ret); > + break; > + case MAX20730_DEBUGFS_VOUT_MAX: > + ret = i2c_smbus_read_word_data(psu->client, PMBUS_VOUT_MAX); > + if (ret < 0) > + return ret; > + len = snprintf(tbuf, 3, "%d", ret); > + break; > + default: > + return -EINVAL; > + } > + > + tbuf[len] = '\n'; > + len += 2; Why + 2 ? Doesn't that also return the terminating '\0' ? Or is that on purpose ? > + > + return simple_read_from_buffer(buf, count, ppos, tbuf, len); > +} > + > +static const struct file_operations max20730_fops = { > + .llseek = noop_llseek, > + .read = max20730_debugfs_read, > + .write = NULL, > + .open = simple_open, > +}; > + > +static int max20730_init_debugfs(struct i2c_client *client, > + struct max20730_data *data) > +{ > + int ret, i; > + struct dentry *debugfs; > + struct dentry *max20730_dir; > + struct max20730_debugfs_data *psu; > + > + ret = i2c_smbus_read_word_data(client, MAX20730_MFR_DEVSET2); > + if (ret < 0) > + return ret; > + data->mfr_devset2 = ret; > + > + ret = i2c_smbus_read_word_data(client, MAX20730_MFR_VOUT_MIN); > + if (ret < 0) > + return ret; > + data->mfr_voutmin = ret; > + > + psu = devm_kzalloc(&client->dev, sizeof(*psu), GFP_KERNEL); > + if (!psu) > + return -ENOMEM; > + psu->client = client; > + > + debugfs = pmbus_get_debugfs_dir(client); > + if (!debugfs) > + return -ENOENT; > + > + max20730_dir = debugfs_create_dir(client->name, debugfs); > + if (!max20730_dir) > + return -ENOENT; > + > + for (i = 0; i < MAX20730_DEBUGFS_NUM_ENTRIES; ++i) > + psu->debugfs_entries[i] = i; > + > + debugfs_create_file("vout_min", 0444, max20730_dir, > + &psu->debugfs_entries[MAX20730_DEBUGFS_VOUT_MIN], > + &max20730_fops); > + debugfs_create_file("frequency", 0444, max20730_dir, > + &psu->debugfs_entries[MAX20730_DEBUGFS_FREQUENCY], > + &max20730_fops); > + debugfs_create_file("power_good_delay", 0444, max20730_dir, > + &psu->debugfs_entries[MAX20730_DEBUGFS_PG_DELAY], > + &max20730_fops); > + debugfs_create_file("internal_gain", 0444, max20730_dir, > + &psu->debugfs_entries[MAX20730_DEBUGFS_INTERNAL_GAIN], > + &max20730_fops); > + debugfs_create_file("boot_voltage", 0444, max20730_dir, > + &psu->debugfs_entries[MAX20730_DEBUGFS_BOOT_VOLTAGE], > + &max20730_fops); > + debugfs_create_file("out_voltage_ramp_rate", 0444, max20730_dir, > + &psu->debugfs_entries[MAX20730_DEBUGFS_OUT_V_RAMP_RATE], > + &max20730_fops); > + debugfs_create_file("oc_protection_mode", 0444, max20730_dir, > + &psu->debugfs_entries[MAX20730_DEBUGFS_OC_PROTECT_MODE], > + &max20730_fops); > + debugfs_create_file("soft_start_timing", 0444, max20730_dir, > + &psu->debugfs_entries[MAX20730_DEBUGFS_SS_TIMING], > + &max20730_fops); > + debugfs_create_file("imax", 0444, max20730_dir, > + &psu->debugfs_entries[MAX20730_DEBUGFS_IMAX], > + &max20730_fops); > + debugfs_create_file("operation", 0444, max20730_dir, > + &psu->debugfs_entries[MAX20730_DEBUGFS_OPERATION], > + &max20730_fops); > + debugfs_create_file("on_off_config", 0444, max20730_dir, > + &psu->debugfs_entries[MAX20730_DEBUGFS_ON_OFF_CONFIG], > + &max20730_fops); > + debugfs_create_file("smbalert_mask", 0444, max20730_dir, > + &psu->debugfs_entries[MAX20730_DEBUGFS_SMBALERT_MASK], > + &max20730_fops); > + debugfs_create_file("vout_mode", 0444, max20730_dir, > + &psu->debugfs_entries[MAX20730_DEBUGFS_VOUT_MODE], > + &max20730_fops); > + debugfs_create_file("vout_command", 0444, max20730_dir, > + &psu->debugfs_entries[MAX20730_DEBUGFS_VOUT_COMMAND], > + &max20730_fops); > + debugfs_create_file("vout_max", 0444, max20730_dir, > + &psu->debugfs_entries[MAX20730_DEBUGFS_VOUT_MAX], > + &max20730_fops); > + > + return 0; > +} > +#else > +static int max20730_init_debugfs(struct i2c_client *client, > + struct max20730_data *data) > +{ > + return 0; > +} > +#endif /* CONFIG_DEBUG_FS */ > > /* > * Convert discreet value to direct data format. Strictly speaking, all passed > @@ -370,7 +723,16 @@ static int max20730_probe(struct i2c_client *client, > return ret; > data->mfr_devset1 = ret; > > - return pmbus_do_probe(client, id, &data->info); > + ret = pmbus_do_probe(client, id, &data->info); > + if (ret < 0) > + return ret; > + > + ret = max20730_init_debugfs(client, data); > + if (ret) > + dev_warn(dev, "Failed to register debugfs: %d\n", > + ret); > + > + return 0; > } > > static const struct i2c_device_id max20730_id[] = {
diff --git a/drivers/hwmon/pmbus/max20730.c b/drivers/hwmon/pmbus/max20730.c index a151a2b..aa5e2be 100644 --- a/drivers/hwmon/pmbus/max20730.c +++ b/drivers/hwmon/pmbus/max20730.c @@ -8,6 +8,7 @@ */ #include <linux/bits.h> +#include <linux/debugfs.h> #include <linux/err.h> #include <linux/i2c.h> #include <linux/init.h> @@ -26,16 +27,368 @@ enum chips { max20743 }; +enum { + MAX20730_DEBUGFS_VOUT_MIN = 0, + MAX20730_DEBUGFS_FREQUENCY, + MAX20730_DEBUGFS_PG_DELAY, + MAX20730_DEBUGFS_INTERNAL_GAIN, + MAX20730_DEBUGFS_BOOT_VOLTAGE, + MAX20730_DEBUGFS_OUT_V_RAMP_RATE, + MAX20730_DEBUGFS_OC_PROTECT_MODE, + MAX20730_DEBUGFS_SS_TIMING, + MAX20730_DEBUGFS_IMAX, + MAX20730_DEBUGFS_OPERATION, + MAX20730_DEBUGFS_ON_OFF_CONFIG, + MAX20730_DEBUGFS_SMBALERT_MASK, + MAX20730_DEBUGFS_VOUT_MODE, + MAX20730_DEBUGFS_VOUT_COMMAND, + MAX20730_DEBUGFS_VOUT_MAX, + MAX20730_DEBUGFS_NUM_ENTRIES +}; + struct max20730_data { enum chips id; struct pmbus_driver_info info; struct mutex lock; /* Used to protect against parallel writes */ u16 mfr_devset1; + u16 mfr_devset2; + u16 mfr_voutmin; }; #define to_max20730_data(x) container_of(x, struct max20730_data, info) +#define PMBUS_SMB_ALERT_MASK 0x1B + +#define MAX20730_MFR_VOUT_MIN 0xd1 #define MAX20730_MFR_DEVSET1 0xd2 +#define MAX20730_MFR_DEVSET2 0xd3 + +#define MAX20730_MFR_VOUT_MIN_MASK GENMASK(9, 0) +#define MAX20730_MFR_VOUT_MIN_BIT_POS 0 + +#define MAX20730_MFR_DEVSET1_RGAIN_MASK (BIT(13) | BIT(14)) +#define MAX20730_MFR_DEVSET1_OTP_MASK (BIT(11) | BIT(12)) +#define MAX20730_MFR_DEVSET1_VBOOT_MASK (BIT(8) | BIT(9)) +#define MAX20730_MFR_DEVSET1_OCP_MASK (BIT(5) | BIT(6)) +#define MAX20730_MFR_DEVSET1_FSW_MASK GENMASK(4, 2) +#define MAX20730_MFR_DEVSET1_TSTAT_MASK (BIT(0) | BIT(1)) + +#define MAX20730_MFR_DEVSET1_RGAIN_BIT_POS 13 +#define MAX20730_MFR_DEVSET1_OTP_BIT_POS 11 +#define MAX20730_MFR_DEVSET1_VBOOT_BIT_POS 8 +#define MAX20730_MFR_DEVSET1_OCP_BIT_POS 5 +#define MAX20730_MFR_DEVSET1_FSW_BIT_POS 2 +#define MAX20730_MFR_DEVSET1_TSTAT_BIT_POS 0 + +#define MAX20730_MFR_DEVSET2_IMAX_MASK GENMASK(10, 8) +#define MAX20730_MFR_DEVSET2_VRATE (BIT(6) | BIT(7)) +#define MAX20730_MFR_DEVSET2_OCPM_MASK BIT(5) +#define MAX20730_MFR_DEVSET2_SS_MASK (BIT(0) | BIT(1)) + +#define MAX20730_MFR_DEVSET2_IMAX_BIT_POS 8 +#define MAX20730_MFR_DEVSET2_VRATE_BIT_POS 6 +#define MAX20730_MFR_DEVSET2_OCPM_BIT_POS 5 +#define MAX20730_MFR_DEVSET2_SS_BIT_POS 0 + +#define DEBUG_FS_DATA_MAX 8 + +struct max20730_debugfs_data { + struct i2c_client *client; + int debugfs_entries[MAX20730_DEBUGFS_NUM_ENTRIES]; +}; + +#define to_psu(x, y) container_of((x), \ + struct max20730_debugfs_data, debugfs_entries[(y)]) + +#ifdef CONFIG_DEBUG_FS +static ssize_t max20730_debugfs_read(struct file *file, char __user *buf, + size_t count, loff_t *ppos) +{ + int ret, len; + int *idxp = file->private_data; + int idx = *idxp; + struct max20730_debugfs_data *psu = to_psu(idxp, idx); + const struct pmbus_driver_info *info; + const struct max20730_data *data; + char tbuf[DEBUG_FS_DATA_MAX + 2] = { 0 }; + u16 val; + + info = pmbus_get_driver_info(psu->client); + data = to_max20730_data(info); + + switch (idx) { + case MAX20730_DEBUGFS_VOUT_MIN: + len = snprintf(tbuf, 5, "%d", data->mfr_voutmin); + break; + case MAX20730_DEBUGFS_FREQUENCY: + val = (data->mfr_devset1 & MAX20730_MFR_DEVSET1_FSW_MASK) + >> MAX20730_MFR_DEVSET1_FSW_BIT_POS; + if (val == 0) + ret = 400; + else if (val == 1) + ret = 500; + else if (val == 2 || val == 3) + ret = 600; + else if (val == 4) + ret = 700; + else if (val == 5) + ret = 800; + else + ret = 900; + len = snprintf(tbuf, 4, "%d", ret); + break; + case MAX20730_DEBUGFS_PG_DELAY: + val = (data->mfr_devset1 & MAX20730_MFR_DEVSET1_TSTAT_MASK) + >> MAX20730_MFR_DEVSET1_TSTAT_BIT_POS; + + if (val == 0) + strcpy(tbuf, "2000"); + else if (val == 1) + strcpy(tbuf, "125"); + else if (val == 2) + strcpy(tbuf, "62.5"); + else + strcpy(tbuf, "32"); + len = strnlen(tbuf, DEBUG_FS_DATA_MAX); + break; + + case MAX20730_DEBUGFS_INTERNAL_GAIN: + val = (data->mfr_devset1 & MAX20730_MFR_DEVSET1_RGAIN_MASK) + >> MAX20730_MFR_DEVSET1_RGAIN_BIT_POS; + + if (data->id == max20734) { + /* AN6209 */ + if (val == 0) + strcpy(tbuf, "0.8"); + else if (val == 1) + strcpy(tbuf, "3.2"); + else if (val == 2) + strcpy(tbuf, "1.6"); + else + strcpy(tbuf, "6.4"); + } else if (data->id == max20730 || data->id == max20710) { + /* AN6042 or AN6140 */ + if (val == 0) + strcpy(tbuf, "0.9"); + else if (val == 1) + strcpy(tbuf, "3.6"); + else if (val == 2) + strcpy(tbuf, "1.8"); + else + strcpy(tbuf, "7.2"); + } else if (data->id == max20743) { + /* AN6042 */ + if (val == 0) + strcpy(tbuf, "0.45"); + else if (val == 1) + strcpy(tbuf, "1.8"); + else if (val == 2) + strcpy(tbuf, "0.9"); + else + strcpy(tbuf, "3.6"); + } else + return -EINVAL; + + len = strnlen(tbuf, DEBUG_FS_DATA_MAX); + break; + case MAX20730_DEBUGFS_BOOT_VOLTAGE: + val = (data->mfr_devset1 & MAX20730_MFR_DEVSET1_VBOOT_MASK) + >> MAX20730_MFR_DEVSET1_VBOOT_BIT_POS; + + if (val == 0) + strcpy(tbuf, "0.6484"); + else if (val == 1) + strcpy(tbuf, "0.8984"); + else if (val == 2) + strcpy(tbuf, "1.0"); + else + return -EINVAL; + + len = strnlen(tbuf, DEBUG_FS_DATA_MAX); + break; + case MAX20730_DEBUGFS_OUT_V_RAMP_RATE: + val = (data->mfr_devset2 & MAX20730_MFR_DEVSET2_VRATE) + >> MAX20730_MFR_DEVSET2_VRATE_BIT_POS; + + if (val == 0) + ret = 4; + else if (val == 1) + ret = 2; + else if (val == 2) + ret = 1; + else + return -EINVAL; + + len = snprintf(tbuf, 2, "%d", ret); + break; + case MAX20730_DEBUGFS_OC_PROTECT_MODE: + ret = (data->mfr_devset2 & MAX20730_MFR_DEVSET2_OCPM_MASK) + >> MAX20730_MFR_DEVSET2_OCPM_BIT_POS; + len = snprintf(tbuf, 2, "%d", ret); + break; + case MAX20730_DEBUGFS_SS_TIMING: + val = (data->mfr_devset2 & MAX20730_MFR_DEVSET2_SS_MASK) + >> MAX20730_MFR_DEVSET2_SS_BIT_POS; + + if (val == 0) + strcpy(tbuf, "0.75"); + else if (val == 1) + strcpy(tbuf, "1.5"); + else if (val == 2) + strcpy(tbuf, "3"); + else + strcpy(tbuf, "6"); + + len = strnlen(tbuf, DEBUG_FS_DATA_MAX); + break; + case MAX20730_DEBUGFS_IMAX: + ret = (data->mfr_devset2 & MAX20730_MFR_DEVSET2_IMAX_MASK) + >> MAX20730_MFR_DEVSET2_IMAX_BIT_POS; + len = snprintf(tbuf, 2, "%d", ret); + break; + case MAX20730_DEBUGFS_OPERATION: + ret = i2c_smbus_read_byte_data(psu->client, PMBUS_OPERATION); + if (ret < 0) + return ret; + len = snprintf(tbuf, 2, "%d", ret); + break; + case MAX20730_DEBUGFS_ON_OFF_CONFIG: + ret = i2c_smbus_read_byte_data(psu->client, PMBUS_ON_OFF_CONFIG); + if (ret < 0) + return ret; + len = snprintf(tbuf, 2, "%d", ret); + break; + case MAX20730_DEBUGFS_SMBALERT_MASK: + ret = i2c_smbus_read_word_data(psu->client, + PMBUS_SMB_ALERT_MASK); + if (ret < 0) + return ret; + len = snprintf(tbuf, 3, "%d", ret); + break; + case MAX20730_DEBUGFS_VOUT_MODE: + ret = i2c_smbus_read_byte_data(psu->client, PMBUS_VOUT_MODE); + if (ret < 0) + return ret; + len = snprintf(tbuf, 2, "%d", ret); + break; + case MAX20730_DEBUGFS_VOUT_COMMAND: + ret = i2c_smbus_read_word_data(psu->client, PMBUS_VOUT_COMMAND); + if (ret < 0) + return ret; + len = snprintf(tbuf, 3, "%d", ret); + break; + case MAX20730_DEBUGFS_VOUT_MAX: + ret = i2c_smbus_read_word_data(psu->client, PMBUS_VOUT_MAX); + if (ret < 0) + return ret; + len = snprintf(tbuf, 3, "%d", ret); + break; + default: + return -EINVAL; + } + + tbuf[len] = '\n'; + len += 2; + + return simple_read_from_buffer(buf, count, ppos, tbuf, len); +} + +static const struct file_operations max20730_fops = { + .llseek = noop_llseek, + .read = max20730_debugfs_read, + .write = NULL, + .open = simple_open, +}; + +static int max20730_init_debugfs(struct i2c_client *client, + struct max20730_data *data) +{ + int ret, i; + struct dentry *debugfs; + struct dentry *max20730_dir; + struct max20730_debugfs_data *psu; + + ret = i2c_smbus_read_word_data(client, MAX20730_MFR_DEVSET2); + if (ret < 0) + return ret; + data->mfr_devset2 = ret; + + ret = i2c_smbus_read_word_data(client, MAX20730_MFR_VOUT_MIN); + if (ret < 0) + return ret; + data->mfr_voutmin = ret; + + psu = devm_kzalloc(&client->dev, sizeof(*psu), GFP_KERNEL); + if (!psu) + return -ENOMEM; + psu->client = client; + + debugfs = pmbus_get_debugfs_dir(client); + if (!debugfs) + return -ENOENT; + + max20730_dir = debugfs_create_dir(client->name, debugfs); + if (!max20730_dir) + return -ENOENT; + + for (i = 0; i < MAX20730_DEBUGFS_NUM_ENTRIES; ++i) + psu->debugfs_entries[i] = i; + + debugfs_create_file("vout_min", 0444, max20730_dir, + &psu->debugfs_entries[MAX20730_DEBUGFS_VOUT_MIN], + &max20730_fops); + debugfs_create_file("frequency", 0444, max20730_dir, + &psu->debugfs_entries[MAX20730_DEBUGFS_FREQUENCY], + &max20730_fops); + debugfs_create_file("power_good_delay", 0444, max20730_dir, + &psu->debugfs_entries[MAX20730_DEBUGFS_PG_DELAY], + &max20730_fops); + debugfs_create_file("internal_gain", 0444, max20730_dir, + &psu->debugfs_entries[MAX20730_DEBUGFS_INTERNAL_GAIN], + &max20730_fops); + debugfs_create_file("boot_voltage", 0444, max20730_dir, + &psu->debugfs_entries[MAX20730_DEBUGFS_BOOT_VOLTAGE], + &max20730_fops); + debugfs_create_file("out_voltage_ramp_rate", 0444, max20730_dir, + &psu->debugfs_entries[MAX20730_DEBUGFS_OUT_V_RAMP_RATE], + &max20730_fops); + debugfs_create_file("oc_protection_mode", 0444, max20730_dir, + &psu->debugfs_entries[MAX20730_DEBUGFS_OC_PROTECT_MODE], + &max20730_fops); + debugfs_create_file("soft_start_timing", 0444, max20730_dir, + &psu->debugfs_entries[MAX20730_DEBUGFS_SS_TIMING], + &max20730_fops); + debugfs_create_file("imax", 0444, max20730_dir, + &psu->debugfs_entries[MAX20730_DEBUGFS_IMAX], + &max20730_fops); + debugfs_create_file("operation", 0444, max20730_dir, + &psu->debugfs_entries[MAX20730_DEBUGFS_OPERATION], + &max20730_fops); + debugfs_create_file("on_off_config", 0444, max20730_dir, + &psu->debugfs_entries[MAX20730_DEBUGFS_ON_OFF_CONFIG], + &max20730_fops); + debugfs_create_file("smbalert_mask", 0444, max20730_dir, + &psu->debugfs_entries[MAX20730_DEBUGFS_SMBALERT_MASK], + &max20730_fops); + debugfs_create_file("vout_mode", 0444, max20730_dir, + &psu->debugfs_entries[MAX20730_DEBUGFS_VOUT_MODE], + &max20730_fops); + debugfs_create_file("vout_command", 0444, max20730_dir, + &psu->debugfs_entries[MAX20730_DEBUGFS_VOUT_COMMAND], + &max20730_fops); + debugfs_create_file("vout_max", 0444, max20730_dir, + &psu->debugfs_entries[MAX20730_DEBUGFS_VOUT_MAX], + &max20730_fops); + + return 0; +} +#else +static int max20730_init_debugfs(struct i2c_client *client, + struct max20730_data *data) +{ + return 0; +} +#endif /* CONFIG_DEBUG_FS */ /* * Convert discreet value to direct data format. Strictly speaking, all passed @@ -370,7 +723,16 @@ static int max20730_probe(struct i2c_client *client, return ret; data->mfr_devset1 = ret; - return pmbus_do_probe(client, id, &data->info); + ret = pmbus_do_probe(client, id, &data->info); + if (ret < 0) + return ret; + + ret = max20730_init_debugfs(client, data); + if (ret) + dev_warn(dev, "Failed to register debugfs: %d\n", + ret); + + return 0; } static const struct i2c_device_id max20730_id[] = {
Add debugfs interface support for accessing device specific registers (MFR_VOUT_MIN, MFR_DEVSET1 and MFR_DEVSET2) and others including OPERATION, ON_OFF_CONFIG, SMB_ALERT_MASK, VOUT_MODE, VOUT_COMMAND and VOUT_MAX. Signed-off-by: Ugur Usug <ugur.usug@maximintegrated.com> --- drivers/hwmon/pmbus/max20730.c | 364 ++++++++++++++++++++++++++++++++++++++++- 1 file changed, 363 insertions(+), 1 deletion(-)