forked from Minki/linux
hwmon: (pmbus/max20730) add device monitoring via debugfs
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> Link: https://lore.kernel.org/r/MWHPR11MB1965C01083AD013C630646B2FD3B0@MWHPR11MB1965.namprd11.prod.outlook.com [groeck: Resolved conflics seen due to PMBus driver API changes] Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Ugur Usug
Guenter Roeck
parent
2b52278150
commit
8910c0bd53
@ -8,6 +8,7 @@
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*/
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#include <linux/bits.h>
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#include <linux/debugfs.h>
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#include <linux/err.h>
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#include <linux/i2c.h>
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#include <linux/init.h>
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@ -26,16 +27,367 @@ enum chips {
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max20743
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};
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enum {
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MAX20730_DEBUGFS_VOUT_MIN = 0,
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MAX20730_DEBUGFS_FREQUENCY,
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MAX20730_DEBUGFS_PG_DELAY,
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MAX20730_DEBUGFS_INTERNAL_GAIN,
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MAX20730_DEBUGFS_BOOT_VOLTAGE,
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MAX20730_DEBUGFS_OUT_V_RAMP_RATE,
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MAX20730_DEBUGFS_OC_PROTECT_MODE,
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MAX20730_DEBUGFS_SS_TIMING,
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MAX20730_DEBUGFS_IMAX,
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MAX20730_DEBUGFS_OPERATION,
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MAX20730_DEBUGFS_ON_OFF_CONFIG,
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MAX20730_DEBUGFS_SMBALERT_MASK,
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MAX20730_DEBUGFS_VOUT_MODE,
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MAX20730_DEBUGFS_VOUT_COMMAND,
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MAX20730_DEBUGFS_VOUT_MAX,
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MAX20730_DEBUGFS_NUM_ENTRIES
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};
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struct max20730_data {
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enum chips id;
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struct pmbus_driver_info info;
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struct mutex lock; /* Used to protect against parallel writes */
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u16 mfr_devset1;
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u16 mfr_devset2;
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u16 mfr_voutmin;
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};
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#define to_max20730_data(x) container_of(x, struct max20730_data, info)
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#define VOLT_FROM_REG(val) DIV_ROUND_CLOSEST((val), 1 << 9)
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#define PMBUS_SMB_ALERT_MASK 0x1B
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#define MAX20730_MFR_VOUT_MIN 0xd1
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#define MAX20730_MFR_DEVSET1 0xd2
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#define MAX20730_MFR_DEVSET2 0xd3
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#define MAX20730_MFR_VOUT_MIN_MASK GENMASK(9, 0)
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#define MAX20730_MFR_VOUT_MIN_BIT_POS 0
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#define MAX20730_MFR_DEVSET1_RGAIN_MASK (BIT(13) | BIT(14))
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#define MAX20730_MFR_DEVSET1_OTP_MASK (BIT(11) | BIT(12))
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#define MAX20730_MFR_DEVSET1_VBOOT_MASK (BIT(8) | BIT(9))
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#define MAX20730_MFR_DEVSET1_OCP_MASK (BIT(5) | BIT(6))
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#define MAX20730_MFR_DEVSET1_FSW_MASK GENMASK(4, 2)
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#define MAX20730_MFR_DEVSET1_TSTAT_MASK (BIT(0) | BIT(1))
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#define MAX20730_MFR_DEVSET1_RGAIN_BIT_POS 13
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#define MAX20730_MFR_DEVSET1_OTP_BIT_POS 11
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#define MAX20730_MFR_DEVSET1_VBOOT_BIT_POS 8
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#define MAX20730_MFR_DEVSET1_OCP_BIT_POS 5
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#define MAX20730_MFR_DEVSET1_FSW_BIT_POS 2
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#define MAX20730_MFR_DEVSET1_TSTAT_BIT_POS 0
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#define MAX20730_MFR_DEVSET2_IMAX_MASK GENMASK(10, 8)
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#define MAX20730_MFR_DEVSET2_VRATE (BIT(6) | BIT(7))
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#define MAX20730_MFR_DEVSET2_OCPM_MASK BIT(5)
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#define MAX20730_MFR_DEVSET2_SS_MASK (BIT(0) | BIT(1))
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#define MAX20730_MFR_DEVSET2_IMAX_BIT_POS 8
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#define MAX20730_MFR_DEVSET2_VRATE_BIT_POS 6
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#define MAX20730_MFR_DEVSET2_OCPM_BIT_POS 5
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#define MAX20730_MFR_DEVSET2_SS_BIT_POS 0
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#define DEBUG_FS_DATA_MAX 16
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struct max20730_debugfs_data {
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struct i2c_client *client;
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int debugfs_entries[MAX20730_DEBUGFS_NUM_ENTRIES];
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};
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#define to_psu(x, y) container_of((x), \
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struct max20730_debugfs_data, debugfs_entries[(y)])
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#ifdef CONFIG_DEBUG_FS
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static ssize_t max20730_debugfs_read(struct file *file, char __user *buf,
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size_t count, loff_t *ppos)
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{
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int ret, len;
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int *idxp = file->private_data;
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int idx = *idxp;
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struct max20730_debugfs_data *psu = to_psu(idxp, idx);
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const struct pmbus_driver_info *info;
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const struct max20730_data *data;
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char tbuf[DEBUG_FS_DATA_MAX] = { 0 };
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u16 val;
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info = pmbus_get_driver_info(psu->client);
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data = to_max20730_data(info);
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switch (idx) {
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case MAX20730_DEBUGFS_VOUT_MIN:
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ret = VOLT_FROM_REG(data->mfr_voutmin * 10000);
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len = snprintf(tbuf, DEBUG_FS_DATA_MAX, "%d.%d\n",
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ret / 10000, ret % 10000);
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break;
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case MAX20730_DEBUGFS_FREQUENCY:
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val = (data->mfr_devset1 & MAX20730_MFR_DEVSET1_FSW_MASK)
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>> MAX20730_MFR_DEVSET1_FSW_BIT_POS;
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if (val == 0)
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ret = 400;
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else if (val == 1)
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ret = 500;
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else if (val == 2 || val == 3)
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ret = 600;
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else if (val == 4)
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ret = 700;
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else if (val == 5)
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ret = 800;
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else
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ret = 900;
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len = snprintf(tbuf, DEBUG_FS_DATA_MAX, "%d\n", ret);
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break;
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case MAX20730_DEBUGFS_PG_DELAY:
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val = (data->mfr_devset1 & MAX20730_MFR_DEVSET1_TSTAT_MASK)
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>> MAX20730_MFR_DEVSET1_TSTAT_BIT_POS;
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if (val == 0)
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len = strlcpy(tbuf, "2000\n", DEBUG_FS_DATA_MAX);
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else if (val == 1)
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len = strlcpy(tbuf, "125\n", DEBUG_FS_DATA_MAX);
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else if (val == 2)
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len = strlcpy(tbuf, "62.5\n", DEBUG_FS_DATA_MAX);
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else
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len = strlcpy(tbuf, "32\n", DEBUG_FS_DATA_MAX);
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break;
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case MAX20730_DEBUGFS_INTERNAL_GAIN:
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val = (data->mfr_devset1 & MAX20730_MFR_DEVSET1_RGAIN_MASK)
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>> MAX20730_MFR_DEVSET1_RGAIN_BIT_POS;
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if (data->id == max20734) {
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/* AN6209 */
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if (val == 0)
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len = strlcpy(tbuf, "0.8\n", DEBUG_FS_DATA_MAX);
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else if (val == 1)
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len = strlcpy(tbuf, "3.2\n", DEBUG_FS_DATA_MAX);
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else if (val == 2)
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len = strlcpy(tbuf, "1.6\n", DEBUG_FS_DATA_MAX);
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else
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len = strlcpy(tbuf, "6.4\n", DEBUG_FS_DATA_MAX);
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} else if (data->id == max20730 || data->id == max20710) {
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/* AN6042 or AN6140 */
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if (val == 0)
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len = strlcpy(tbuf, "0.9\n", DEBUG_FS_DATA_MAX);
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else if (val == 1)
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len = strlcpy(tbuf, "3.6\n", DEBUG_FS_DATA_MAX);
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else if (val == 2)
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len = strlcpy(tbuf, "1.8\n", DEBUG_FS_DATA_MAX);
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else
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len = strlcpy(tbuf, "7.2\n", DEBUG_FS_DATA_MAX);
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} else if (data->id == max20743) {
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/* AN6042 */
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if (val == 0)
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len = strlcpy(tbuf, "0.45\n", DEBUG_FS_DATA_MAX);
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else if (val == 1)
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len = strlcpy(tbuf, "1.8\n", DEBUG_FS_DATA_MAX);
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else if (val == 2)
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len = strlcpy(tbuf, "0.9\n", DEBUG_FS_DATA_MAX);
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else
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len = strlcpy(tbuf, "3.6\n", DEBUG_FS_DATA_MAX);
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} else {
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len = strlcpy(tbuf, "Not supported\n", DEBUG_FS_DATA_MAX);
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}
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break;
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case MAX20730_DEBUGFS_BOOT_VOLTAGE:
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val = (data->mfr_devset1 & MAX20730_MFR_DEVSET1_VBOOT_MASK)
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>> MAX20730_MFR_DEVSET1_VBOOT_BIT_POS;
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if (val == 0)
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len = strlcpy(tbuf, "0.6484\n", DEBUG_FS_DATA_MAX);
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else if (val == 1)
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len = strlcpy(tbuf, "0.8984\n", DEBUG_FS_DATA_MAX);
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else if (val == 2)
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len = strlcpy(tbuf, "1.0\n", DEBUG_FS_DATA_MAX);
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else
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len = strlcpy(tbuf, "Invalid\n", DEBUG_FS_DATA_MAX);
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break;
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case MAX20730_DEBUGFS_OUT_V_RAMP_RATE:
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val = (data->mfr_devset2 & MAX20730_MFR_DEVSET2_VRATE)
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>> MAX20730_MFR_DEVSET2_VRATE_BIT_POS;
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if (val == 0)
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len = strlcpy(tbuf, "4\n", DEBUG_FS_DATA_MAX);
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else if (val == 1)
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len = strlcpy(tbuf, "2\n", DEBUG_FS_DATA_MAX);
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else if (val == 2)
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len = strlcpy(tbuf, "1\n", DEBUG_FS_DATA_MAX);
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else
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len = strlcpy(tbuf, "Invalid\n", DEBUG_FS_DATA_MAX);
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break;
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case MAX20730_DEBUGFS_OC_PROTECT_MODE:
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ret = (data->mfr_devset2 & MAX20730_MFR_DEVSET2_OCPM_MASK)
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>> MAX20730_MFR_DEVSET2_OCPM_BIT_POS;
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len = snprintf(tbuf, DEBUG_FS_DATA_MAX, "%d\n", ret);
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break;
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case MAX20730_DEBUGFS_SS_TIMING:
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val = (data->mfr_devset2 & MAX20730_MFR_DEVSET2_SS_MASK)
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>> MAX20730_MFR_DEVSET2_SS_BIT_POS;
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if (val == 0)
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len = strlcpy(tbuf, "0.75\n", DEBUG_FS_DATA_MAX);
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else if (val == 1)
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len = strlcpy(tbuf, "1.5\n", DEBUG_FS_DATA_MAX);
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else if (val == 2)
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len = strlcpy(tbuf, "3\n", DEBUG_FS_DATA_MAX);
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else
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len = strlcpy(tbuf, "6\n", DEBUG_FS_DATA_MAX);
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break;
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case MAX20730_DEBUGFS_IMAX:
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ret = (data->mfr_devset2 & MAX20730_MFR_DEVSET2_IMAX_MASK)
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>> MAX20730_MFR_DEVSET2_IMAX_BIT_POS;
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len = snprintf(tbuf, DEBUG_FS_DATA_MAX, "%d\n", ret);
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break;
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case MAX20730_DEBUGFS_OPERATION:
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ret = i2c_smbus_read_byte_data(psu->client, PMBUS_OPERATION);
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if (ret < 0)
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return ret;
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len = snprintf(tbuf, DEBUG_FS_DATA_MAX, "%d\n", ret);
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break;
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case MAX20730_DEBUGFS_ON_OFF_CONFIG:
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ret = i2c_smbus_read_byte_data(psu->client, PMBUS_ON_OFF_CONFIG);
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if (ret < 0)
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return ret;
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len = snprintf(tbuf, DEBUG_FS_DATA_MAX, "%d\n", ret);
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break;
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case MAX20730_DEBUGFS_SMBALERT_MASK:
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ret = i2c_smbus_read_word_data(psu->client,
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PMBUS_SMB_ALERT_MASK);
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if (ret < 0)
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return ret;
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len = snprintf(tbuf, DEBUG_FS_DATA_MAX, "%d\n", ret);
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break;
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case MAX20730_DEBUGFS_VOUT_MODE:
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ret = i2c_smbus_read_byte_data(psu->client, PMBUS_VOUT_MODE);
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if (ret < 0)
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return ret;
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len = snprintf(tbuf, DEBUG_FS_DATA_MAX, "%d\n", ret);
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break;
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case MAX20730_DEBUGFS_VOUT_COMMAND:
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ret = i2c_smbus_read_word_data(psu->client, PMBUS_VOUT_COMMAND);
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if (ret < 0)
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return ret;
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ret = VOLT_FROM_REG(ret * 10000);
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len = snprintf(tbuf, DEBUG_FS_DATA_MAX,
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"%d.%d\n", ret / 10000, ret % 10000);
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break;
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case MAX20730_DEBUGFS_VOUT_MAX:
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ret = i2c_smbus_read_word_data(psu->client, PMBUS_VOUT_MAX);
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if (ret < 0)
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return ret;
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ret = VOLT_FROM_REG(ret * 10000);
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len = snprintf(tbuf, DEBUG_FS_DATA_MAX,
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"%d.%d\n", ret / 10000, ret % 10000);
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break;
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default:
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len = strlcpy(tbuf, "Invalid\n", DEBUG_FS_DATA_MAX);
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}
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return simple_read_from_buffer(buf, count, ppos, tbuf, len);
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}
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static const struct file_operations max20730_fops = {
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.llseek = noop_llseek,
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.read = max20730_debugfs_read,
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.write = NULL,
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.open = simple_open,
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};
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static int max20730_init_debugfs(struct i2c_client *client,
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struct max20730_data *data)
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{
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int ret, i;
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struct dentry *debugfs;
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struct dentry *max20730_dir;
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struct max20730_debugfs_data *psu;
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ret = i2c_smbus_read_word_data(client, MAX20730_MFR_DEVSET2);
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if (ret < 0)
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return ret;
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data->mfr_devset2 = ret;
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ret = i2c_smbus_read_word_data(client, MAX20730_MFR_VOUT_MIN);
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if (ret < 0)
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return ret;
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data->mfr_voutmin = ret;
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psu = devm_kzalloc(&client->dev, sizeof(*psu), GFP_KERNEL);
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if (!psu)
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return -ENOMEM;
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psu->client = client;
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debugfs = pmbus_get_debugfs_dir(client);
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if (!debugfs)
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return -ENOENT;
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max20730_dir = debugfs_create_dir(client->name, debugfs);
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if (!max20730_dir)
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return -ENOENT;
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for (i = 0; i < MAX20730_DEBUGFS_NUM_ENTRIES; ++i)
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psu->debugfs_entries[i] = i;
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debugfs_create_file("vout_min", 0444, max20730_dir,
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&psu->debugfs_entries[MAX20730_DEBUGFS_VOUT_MIN],
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&max20730_fops);
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debugfs_create_file("frequency", 0444, max20730_dir,
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&psu->debugfs_entries[MAX20730_DEBUGFS_FREQUENCY],
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&max20730_fops);
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debugfs_create_file("power_good_delay", 0444, max20730_dir,
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&psu->debugfs_entries[MAX20730_DEBUGFS_PG_DELAY],
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&max20730_fops);
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debugfs_create_file("internal_gain", 0444, max20730_dir,
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&psu->debugfs_entries[MAX20730_DEBUGFS_INTERNAL_GAIN],
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&max20730_fops);
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debugfs_create_file("boot_voltage", 0444, max20730_dir,
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&psu->debugfs_entries[MAX20730_DEBUGFS_BOOT_VOLTAGE],
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&max20730_fops);
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debugfs_create_file("out_voltage_ramp_rate", 0444, max20730_dir,
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&psu->debugfs_entries[MAX20730_DEBUGFS_OUT_V_RAMP_RATE],
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&max20730_fops);
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debugfs_create_file("oc_protection_mode", 0444, max20730_dir,
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&psu->debugfs_entries[MAX20730_DEBUGFS_OC_PROTECT_MODE],
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&max20730_fops);
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debugfs_create_file("soft_start_timing", 0444, max20730_dir,
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&psu->debugfs_entries[MAX20730_DEBUGFS_SS_TIMING],
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&max20730_fops);
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debugfs_create_file("imax", 0444, max20730_dir,
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&psu->debugfs_entries[MAX20730_DEBUGFS_IMAX],
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&max20730_fops);
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debugfs_create_file("operation", 0444, max20730_dir,
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&psu->debugfs_entries[MAX20730_DEBUGFS_OPERATION],
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&max20730_fops);
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debugfs_create_file("on_off_config", 0444, max20730_dir,
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&psu->debugfs_entries[MAX20730_DEBUGFS_ON_OFF_CONFIG],
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&max20730_fops);
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debugfs_create_file("smbalert_mask", 0444, max20730_dir,
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&psu->debugfs_entries[MAX20730_DEBUGFS_SMBALERT_MASK],
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&max20730_fops);
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debugfs_create_file("vout_mode", 0444, max20730_dir,
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&psu->debugfs_entries[MAX20730_DEBUGFS_VOUT_MODE],
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&max20730_fops);
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debugfs_create_file("vout_command", 0444, max20730_dir,
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&psu->debugfs_entries[MAX20730_DEBUGFS_VOUT_COMMAND],
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&max20730_fops);
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debugfs_create_file("vout_max", 0444, max20730_dir,
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&psu->debugfs_entries[MAX20730_DEBUGFS_VOUT_MAX],
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&max20730_fops);
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return 0;
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}
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#else
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static int max20730_init_debugfs(struct i2c_client *client,
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struct max20730_data *data)
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{
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return 0;
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}
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#endif /* CONFIG_DEBUG_FS */
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static const struct i2c_device_id max20730_id[];
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||||
|
||||
@ -371,7 +723,16 @@ static int max20730_probe(struct i2c_client *client)
|
||||
return ret;
|
||||
data->mfr_devset1 = ret;
|
||||
|
||||
return pmbus_do_probe(client, &data->info);
|
||||
ret = pmbus_do_probe(client, &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[] = {
|
||||
|
||||
Loading…
Reference in New Issue
Block a user