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pmbus: (ibm-cffps) Add support for version 2 of the PSU 

Version 2 of the PSU supports a second page of data and changes the
format of the FW version. Use the devicetree binding to differentiate
between the version the driver should use.

Signed-off-by: Eddie James <eajames@linux.ibm.com>
Link: https://lore.kernel.org/r/1567192263-15065-4-git-send-email-eajames@linux.ibm.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Eddie James 2019-08-30 14:11:03 -05:00 committed by Guenter Roeck
parent d600981d80
commit 2f8a855efe
1 changed files with 88 additions and 22 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

110
drivers/hwmon/pmbus/ibm-cffps.c
View File

@ -12,6 +12,7 @@
#include <linux/leds.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/of_device.h>
#include <linux/pmbus.h>
#include "pmbus.h"
@ -20,8 +21,9 @@
#define CFFPS_PN_CMD 0x9B
#define CFFPS_SN_CMD 0x9E
#define CFFPS_CCIN_CMD 0xBD
#define CFFPS_FW_CMD_START 0xFA
#define CFFPS_FW_NUM_BYTES 4
#define CFFPS_FW_CMD 0xFA
#define CFFPS1_FW_NUM_BYTES 4
#define CFFPS2_FW_NUM_WORDS 3
#define CFFPS_SYS_CONFIG_CMD 0xDA
#define CFFPS_INPUT_HISTORY_CMD 0xD6
@ -52,6 +54,8 @@ enum {
CFFPS_DEBUGFS_NUM_ENTRIES
};
enum versions { cffps1, cffps2 };
struct ibm_cffps_input_history {
struct mutex update_lock;
unsigned long last_update;
@ -61,6 +65,7 @@ struct ibm_cffps_input_history {
};
struct ibm_cffps {
enum versions version;
struct i2c_client *client;
struct ibm_cffps_input_history input_history;
@ -132,6 +137,8 @@ static ssize_t ibm_cffps_debugfs_op(struct file *file, char __user *buf,
struct ibm_cffps *psu = to_psu(idxp, idx);
char data[I2C_SMBUS_BLOCK_MAX] = { 0 };
pmbus_set_page(psu->client, 0);
switch (idx) {
case CFFPS_DEBUGFS_INPUT_HISTORY:
return ibm_cffps_read_input_history(psu, buf, count, ppos);
@ -152,16 +159,36 @@ static ssize_t ibm_cffps_debugfs_op(struct file *file, char __user *buf,
rc = snprintf(data, 5, "%04X", rc);
goto done;
case CFFPS_DEBUGFS_FW:
for (i = 0; i < CFFPS_FW_NUM_BYTES; ++i) {
rc = i2c_smbus_read_byte_data(psu->client,
CFFPS_FW_CMD_START + i);
if (rc < 0)
return rc;
switch (psu->version) {
case cffps1:
for (i = 0; i < CFFPS1_FW_NUM_BYTES; ++i) {
rc = i2c_smbus_read_byte_data(psu->client,
CFFPS_FW_CMD +
i);
if (rc < 0)
return rc;
snprintf(&data[i * 2], 3, "%02X", rc);
snprintf(&data[i * 2], 3, "%02X", rc);
}
rc = i * 2;
break;
case cffps2:
for (i = 0; i < CFFPS2_FW_NUM_WORDS; ++i) {
rc = i2c_smbus_read_word_data(psu->client,
CFFPS_FW_CMD +
i);
if (rc < 0)
return rc;
snprintf(&data[i * 4], 5, "%04X", rc);
}
rc = i * 4;
break;
default:
return -EOPNOTSUPP;
}
rc = i * 2;
goto done;
default:
return -EINVAL;
@ -279,6 +306,8 @@ static void ibm_cffps_led_brightness_set(struct led_classdev *led_cdev,
psu->led_state = CFFPS_LED_ON;
}
pmbus_set_page(psu->client, 0);
rc = i2c_smbus_write_byte_data(psu->client, CFFPS_SYS_CONFIG_CMD,
psu->led_state);
if (rc < 0)
@ -299,6 +328,8 @@ static int ibm_cffps_led_blink_set(struct led_classdev *led_cdev,
if (led_cdev->brightness == LED_OFF)
return 0;
pmbus_set_page(psu->client, 0);
rc = i2c_smbus_write_byte_data(psu->client, CFFPS_SYS_CONFIG_CMD,
CFFPS_LED_BLINK);
if (rc < 0)
@ -328,15 +359,32 @@ static void ibm_cffps_create_led_class(struct ibm_cffps *psu)
dev_warn(dev, "failed to register led class: %d\n", rc);
}
static struct pmbus_driver_info ibm_cffps_info = {
.pages = 1,
.func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT | PMBUS_HAVE_IOUT |
PMBUS_HAVE_PIN | PMBUS_HAVE_FAN12 | PMBUS_HAVE_TEMP |
PMBUS_HAVE_TEMP2 | PMBUS_HAVE_TEMP3 | PMBUS_HAVE_STATUS_VOUT |
PMBUS_HAVE_STATUS_IOUT | PMBUS_HAVE_STATUS_INPUT |
PMBUS_HAVE_STATUS_TEMP | PMBUS_HAVE_STATUS_FAN12,
.read_byte_data = ibm_cffps_read_byte_data,
.read_word_data = ibm_cffps_read_word_data,
static struct pmbus_driver_info ibm_cffps_info[] = {
[cffps1] = {
.pages = 1,
.func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT | PMBUS_HAVE_IOUT |
PMBUS_HAVE_PIN | PMBUS_HAVE_FAN12 | PMBUS_HAVE_TEMP |
PMBUS_HAVE_TEMP2 | PMBUS_HAVE_TEMP3 |
PMBUS_HAVE_STATUS_VOUT | PMBUS_HAVE_STATUS_IOUT |
PMBUS_HAVE_STATUS_INPUT | PMBUS_HAVE_STATUS_TEMP |
PMBUS_HAVE_STATUS_FAN12,
.read_byte_data = ibm_cffps_read_byte_data,
.read_word_data = ibm_cffps_read_word_data,
},
[cffps2] = {
.pages = 2,
.func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT | PMBUS_HAVE_IOUT |
PMBUS_HAVE_PIN | PMBUS_HAVE_FAN12 | PMBUS_HAVE_TEMP |
PMBUS_HAVE_TEMP2 | PMBUS_HAVE_TEMP3 |
PMBUS_HAVE_STATUS_VOUT | PMBUS_HAVE_STATUS_IOUT |
PMBUS_HAVE_STATUS_INPUT | PMBUS_HAVE_STATUS_TEMP |
PMBUS_HAVE_STATUS_FAN12,
.func[1] = PMBUS_HAVE_VOUT | PMBUS_HAVE_IOUT |
PMBUS_HAVE_TEMP | PMBUS_HAVE_TEMP2 | PMBUS_HAVE_TEMP3 |
PMBUS_HAVE_STATUS_VOUT | PMBUS_HAVE_STATUS_IOUT,
.read_byte_data = ibm_cffps_read_byte_data,
.read_word_data = ibm_cffps_read_word_data,
},
};
static struct pmbus_platform_data ibm_cffps_pdata = {
@ -347,12 +395,21 @@ static int ibm_cffps_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
int i, rc;
enum versions vs;
struct dentry *debugfs;
struct dentry *ibm_cffps_dir;
struct ibm_cffps *psu;
const void *md = of_device_get_match_data(&client->dev);
if (md)
vs = (enum versions)md;
else if (id)
vs = (enum versions)id->driver_data;
else
vs = cffps1;
client->dev.platform_data = &ibm_cffps_pdata;
rc = pmbus_do_probe(client, id, &ibm_cffps_info);
rc = pmbus_do_probe(client, id, &ibm_cffps_info[vs]);
if (rc)
return rc;
@ -364,6 +421,7 @@ static int ibm_cffps_probe(struct i2c_client *client,
if (!psu)
return 0;
psu->version = vs;
psu->client = client;
mutex_init(&psu->input_history.update_lock);
psu->input_history.last_update = jiffies - HZ;
@ -405,13 +463,21 @@ static int ibm_cffps_probe(struct i2c_client *client,
}
static const struct i2c_device_id ibm_cffps_id[] = {
{ "ibm_cffps1", 1 },
{ "ibm_cffps1", cffps1 },
{ "ibm_cffps2", cffps2 },
{}
};
MODULE_DEVICE_TABLE(i2c, ibm_cffps_id);
static const struct of_device_id ibm_cffps_of_match[] = {
{ .compatible = "ibm,cffps1" },
{
.compatible = "ibm,cffps1",
.data = (void *)cffps1
},
{
.compatible = "ibm,cffps2",
.data = (void *)cffps2
},
{}
};
MODULE_DEVICE_TABLE(of, ibm_cffps_of_match);