^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Copyright 2017 IBM Corp.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) #include <linux/bitfield.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #include <linux/bitops.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/debugfs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/i2c.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/jiffies.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/leds.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/mutex.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/of_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/pmbus.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include "pmbus.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #define CFFPS_FRU_CMD 0x9A
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #define CFFPS_PN_CMD 0x9B
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #define CFFPS_HEADER_CMD 0x9C
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #define CFFPS_SN_CMD 0x9E
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #define CFFPS_MAX_POWER_OUT_CMD 0xA7
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #define CFFPS_CCIN_CMD 0xBD
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #define CFFPS_FW_CMD 0xFA
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #define CFFPS1_FW_NUM_BYTES 4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #define CFFPS2_FW_NUM_WORDS 3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #define CFFPS_SYS_CONFIG_CMD 0xDA
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #define CFFPS_12VCS_VOUT_CMD 0xDE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #define CFFPS_INPUT_HISTORY_CMD 0xD6
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #define CFFPS_INPUT_HISTORY_SIZE 100
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) #define CFFPS_CCIN_REVISION GENMASK(7, 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #define CFFPS_CCIN_REVISION_LEGACY 0xde
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) #define CFFPS_CCIN_VERSION GENMASK(15, 8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) #define CFFPS_CCIN_VERSION_1 0x2b
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) #define CFFPS_CCIN_VERSION_2 0x2e
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) #define CFFPS_CCIN_VERSION_3 0x51
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) /* STATUS_MFR_SPECIFIC bits */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) #define CFFPS_MFR_FAN_FAULT BIT(0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) #define CFFPS_MFR_THERMAL_FAULT BIT(1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) #define CFFPS_MFR_OV_FAULT BIT(2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) #define CFFPS_MFR_UV_FAULT BIT(3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) #define CFFPS_MFR_PS_KILL BIT(4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) #define CFFPS_MFR_OC_FAULT BIT(5)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) #define CFFPS_MFR_VAUX_FAULT BIT(6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) #define CFFPS_MFR_CURRENT_SHARE_WARNING BIT(7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) #define CFFPS_LED_BLINK (BIT(0) | BIT(6))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) #define CFFPS_LED_ON (BIT(1) | BIT(6))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) #define CFFPS_LED_OFF (BIT(2) | BIT(6))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) #define CFFPS_BLINK_RATE_MS 250
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) enum {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) CFFPS_DEBUGFS_INPUT_HISTORY = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) CFFPS_DEBUGFS_FRU,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) CFFPS_DEBUGFS_PN,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) CFFPS_DEBUGFS_HEADER,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) CFFPS_DEBUGFS_SN,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) CFFPS_DEBUGFS_MAX_POWER_OUT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) CFFPS_DEBUGFS_CCIN,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) CFFPS_DEBUGFS_FW,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) CFFPS_DEBUGFS_ON_OFF_CONFIG,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) CFFPS_DEBUGFS_NUM_ENTRIES
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) enum versions { cffps1, cffps2, cffps_unknown };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) struct ibm_cffps_input_history {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) struct mutex update_lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) unsigned long last_update;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) u8 byte_count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) u8 data[CFFPS_INPUT_HISTORY_SIZE];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) struct ibm_cffps {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) enum versions version;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) struct i2c_client *client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) struct ibm_cffps_input_history input_history;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) int debugfs_entries[CFFPS_DEBUGFS_NUM_ENTRIES];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) char led_name[32];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) u8 led_state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) struct led_classdev led;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) static const struct i2c_device_id ibm_cffps_id[];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) #define to_psu(x, y) container_of((x), struct ibm_cffps, debugfs_entries[(y)])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) static ssize_t ibm_cffps_read_input_history(struct ibm_cffps *psu,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) char __user *buf, size_t count,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) loff_t *ppos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) u8 msgbuf0[1] = { CFFPS_INPUT_HISTORY_CMD };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) u8 msgbuf1[CFFPS_INPUT_HISTORY_SIZE + 1] = { 0 };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) struct i2c_msg msg[2] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) .addr = psu->client->addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) .flags = psu->client->flags,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) .len = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) .buf = msgbuf0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) }, {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) .addr = psu->client->addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) .flags = psu->client->flags | I2C_M_RD,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) .len = CFFPS_INPUT_HISTORY_SIZE + 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) .buf = msgbuf1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) if (!*ppos) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) mutex_lock(&psu->input_history.update_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) if (time_after(jiffies, psu->input_history.last_update + HZ)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) * Use a raw i2c transfer, since we need more bytes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) * than Linux I2C supports through smbus xfr (only 32).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) rc = i2c_transfer(psu->client->adapter, msg, 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) if (rc < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) mutex_unlock(&psu->input_history.update_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) psu->input_history.byte_count = msgbuf1[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) memcpy(psu->input_history.data, &msgbuf1[1],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) CFFPS_INPUT_HISTORY_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) psu->input_history.last_update = jiffies;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) mutex_unlock(&psu->input_history.update_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) return simple_read_from_buffer(buf, count, ppos,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) psu->input_history.data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) psu->input_history.byte_count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) static ssize_t ibm_cffps_debugfs_read(struct file *file, char __user *buf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) size_t count, loff_t *ppos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) u8 cmd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) int i, rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) int *idxp = file->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) int idx = *idxp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) struct ibm_cffps *psu = to_psu(idxp, idx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) char data[I2C_SMBUS_BLOCK_MAX + 2] = { 0 };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) pmbus_set_page(psu->client, 0, 0xff);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) switch (idx) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) case CFFPS_DEBUGFS_INPUT_HISTORY:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) return ibm_cffps_read_input_history(psu, buf, count, ppos);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) case CFFPS_DEBUGFS_FRU:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) cmd = CFFPS_FRU_CMD;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) case CFFPS_DEBUGFS_PN:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) cmd = CFFPS_PN_CMD;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) case CFFPS_DEBUGFS_HEADER:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) cmd = CFFPS_HEADER_CMD;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) case CFFPS_DEBUGFS_SN:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) cmd = CFFPS_SN_CMD;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) case CFFPS_DEBUGFS_MAX_POWER_OUT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) if (psu->version == cffps1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) rc = i2c_smbus_read_word_swapped(psu->client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) CFFPS_MAX_POWER_OUT_CMD);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) rc = i2c_smbus_read_word_data(psu->client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) CFFPS_MAX_POWER_OUT_CMD);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) if (rc < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) rc = snprintf(data, I2C_SMBUS_BLOCK_MAX, "%d", rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) case CFFPS_DEBUGFS_CCIN:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) rc = i2c_smbus_read_word_swapped(psu->client, CFFPS_CCIN_CMD);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) if (rc < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) rc = snprintf(data, 5, "%04X", rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) case CFFPS_DEBUGFS_FW:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) switch (psu->version) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) case cffps1:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) for (i = 0; i < CFFPS1_FW_NUM_BYTES; ++i) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) rc = i2c_smbus_read_byte_data(psu->client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) CFFPS_FW_CMD +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) if (rc < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) snprintf(&data[i * 2], 3, "%02X", rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) rc = i * 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) case cffps2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) for (i = 0; i < CFFPS2_FW_NUM_WORDS; ++i) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) rc = i2c_smbus_read_word_data(psu->client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) CFFPS_FW_CMD +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) if (rc < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) snprintf(&data[i * 4], 5, "%04X", rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) rc = i * 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) case CFFPS_DEBUGFS_ON_OFF_CONFIG:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) rc = i2c_smbus_read_byte_data(psu->client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) PMBUS_ON_OFF_CONFIG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) if (rc < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) rc = snprintf(data, 3, "%02x", rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) rc = i2c_smbus_read_block_data(psu->client, cmd, data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) if (rc < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) done:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) data[rc] = '\n';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) rc += 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) return simple_read_from_buffer(buf, count, ppos, data, rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) static ssize_t ibm_cffps_debugfs_write(struct file *file,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) const char __user *buf, size_t count,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) loff_t *ppos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) u8 data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) ssize_t rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) int *idxp = file->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) int idx = *idxp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) struct ibm_cffps *psu = to_psu(idxp, idx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) switch (idx) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) case CFFPS_DEBUGFS_ON_OFF_CONFIG:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) pmbus_set_page(psu->client, 0, 0xff);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) rc = simple_write_to_buffer(&data, 1, ppos, buf, count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) if (rc <= 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) rc = i2c_smbus_write_byte_data(psu->client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) PMBUS_ON_OFF_CONFIG, data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) rc = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) static const struct file_operations ibm_cffps_fops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) .llseek = noop_llseek,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) .read = ibm_cffps_debugfs_read,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) .write = ibm_cffps_debugfs_write,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) .open = simple_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) static int ibm_cffps_read_byte_data(struct i2c_client *client, int page,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) int reg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) int rc, mfr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) switch (reg) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) case PMBUS_STATUS_VOUT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) case PMBUS_STATUS_IOUT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) case PMBUS_STATUS_TEMPERATURE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) case PMBUS_STATUS_FAN_12:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) rc = pmbus_read_byte_data(client, page, reg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) if (rc < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) mfr = pmbus_read_byte_data(client, page,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) PMBUS_STATUS_MFR_SPECIFIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) if (mfr < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) * Return the status register instead of an error,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) * since we successfully read status.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) /* Add MFR_SPECIFIC bits to the standard pmbus status regs. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) if (reg == PMBUS_STATUS_FAN_12) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) if (mfr & CFFPS_MFR_FAN_FAULT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) rc |= PB_FAN_FAN1_FAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) } else if (reg == PMBUS_STATUS_TEMPERATURE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) if (mfr & CFFPS_MFR_THERMAL_FAULT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) rc |= PB_TEMP_OT_FAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) } else if (reg == PMBUS_STATUS_VOUT) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) if (mfr & (CFFPS_MFR_OV_FAULT | CFFPS_MFR_VAUX_FAULT))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) rc |= PB_VOLTAGE_OV_FAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) if (mfr & CFFPS_MFR_UV_FAULT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) rc |= PB_VOLTAGE_UV_FAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) } else if (reg == PMBUS_STATUS_IOUT) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) if (mfr & CFFPS_MFR_OC_FAULT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) rc |= PB_IOUT_OC_FAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) if (mfr & CFFPS_MFR_CURRENT_SHARE_WARNING)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) rc |= PB_CURRENT_SHARE_FAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) rc = -ENODATA;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) static int ibm_cffps_read_word_data(struct i2c_client *client, int page,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) int phase, int reg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) int rc, mfr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) switch (reg) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) case PMBUS_STATUS_WORD:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) rc = pmbus_read_word_data(client, page, phase, reg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) if (rc < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) mfr = pmbus_read_byte_data(client, page,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) PMBUS_STATUS_MFR_SPECIFIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) if (mfr < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) * Return the status register instead of an error,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) * since we successfully read status.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) if (mfr & CFFPS_MFR_PS_KILL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) rc |= PB_STATUS_OFF;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) case PMBUS_VIRT_READ_VMON:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) rc = pmbus_read_word_data(client, page, phase,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) CFFPS_12VCS_VOUT_CMD);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) rc = -ENODATA;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) static int ibm_cffps_led_brightness_set(struct led_classdev *led_cdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) enum led_brightness brightness)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) u8 next_led_state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) struct ibm_cffps *psu = container_of(led_cdev, struct ibm_cffps, led);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) if (brightness == LED_OFF) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) next_led_state = CFFPS_LED_OFF;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) brightness = LED_FULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) if (psu->led_state != CFFPS_LED_BLINK)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) next_led_state = CFFPS_LED_ON;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) next_led_state = CFFPS_LED_BLINK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) dev_dbg(&psu->client->dev, "LED brightness set: %d. Command: %d.\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) brightness, next_led_state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) pmbus_set_page(psu->client, 0, 0xff);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) rc = i2c_smbus_write_byte_data(psu->client, CFFPS_SYS_CONFIG_CMD,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) next_led_state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) if (rc < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) psu->led_state = next_led_state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) led_cdev->brightness = brightness;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) static int ibm_cffps_led_blink_set(struct led_classdev *led_cdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) unsigned long *delay_on,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) unsigned long *delay_off)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) struct ibm_cffps *psu = container_of(led_cdev, struct ibm_cffps, led);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) dev_dbg(&psu->client->dev, "LED blink set.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) pmbus_set_page(psu->client, 0, 0xff);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) rc = i2c_smbus_write_byte_data(psu->client, CFFPS_SYS_CONFIG_CMD,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) CFFPS_LED_BLINK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) if (rc < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) psu->led_state = CFFPS_LED_BLINK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) led_cdev->brightness = LED_FULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) *delay_on = CFFPS_BLINK_RATE_MS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) *delay_off = CFFPS_BLINK_RATE_MS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) static void ibm_cffps_create_led_class(struct ibm_cffps *psu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) struct i2c_client *client = psu->client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) struct device *dev = &client->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) snprintf(psu->led_name, sizeof(psu->led_name), "%s-%02x", client->name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) client->addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) psu->led.name = psu->led_name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) psu->led.max_brightness = LED_FULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) psu->led.brightness_set_blocking = ibm_cffps_led_brightness_set;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) psu->led.blink_set = ibm_cffps_led_blink_set;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) rc = devm_led_classdev_register(dev, &psu->led);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) dev_warn(dev, "failed to register led class: %d\n", rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) i2c_smbus_write_byte_data(client, CFFPS_SYS_CONFIG_CMD,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) CFFPS_LED_OFF);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) static struct pmbus_driver_info ibm_cffps_info[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) [cffps1] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) .pages = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) .func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT | PMBUS_HAVE_IOUT |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) PMBUS_HAVE_PIN | PMBUS_HAVE_FAN12 | PMBUS_HAVE_TEMP |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) PMBUS_HAVE_TEMP2 | PMBUS_HAVE_TEMP3 |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) PMBUS_HAVE_STATUS_VOUT | PMBUS_HAVE_STATUS_IOUT |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) PMBUS_HAVE_STATUS_INPUT | PMBUS_HAVE_STATUS_TEMP |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) PMBUS_HAVE_STATUS_FAN12,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) .read_byte_data = ibm_cffps_read_byte_data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) .read_word_data = ibm_cffps_read_word_data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) [cffps2] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) .pages = 2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) .func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT | PMBUS_HAVE_IOUT |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) PMBUS_HAVE_PIN | PMBUS_HAVE_FAN12 | PMBUS_HAVE_TEMP |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) PMBUS_HAVE_TEMP2 | PMBUS_HAVE_TEMP3 |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) PMBUS_HAVE_STATUS_VOUT | PMBUS_HAVE_STATUS_IOUT |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) PMBUS_HAVE_STATUS_INPUT | PMBUS_HAVE_STATUS_TEMP |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) PMBUS_HAVE_STATUS_FAN12 | PMBUS_HAVE_VMON,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) .func[1] = PMBUS_HAVE_VOUT | PMBUS_HAVE_IOUT |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) PMBUS_HAVE_TEMP | PMBUS_HAVE_TEMP2 | PMBUS_HAVE_TEMP3 |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) PMBUS_HAVE_STATUS_VOUT | PMBUS_HAVE_STATUS_IOUT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) .read_byte_data = ibm_cffps_read_byte_data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) .read_word_data = ibm_cffps_read_word_data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) static struct pmbus_platform_data ibm_cffps_pdata = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) .flags = PMBUS_SKIP_STATUS_CHECK,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) static int ibm_cffps_probe(struct i2c_client *client)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) int i, rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) enum versions vs = cffps_unknown;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) struct dentry *debugfs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) struct dentry *ibm_cffps_dir;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) struct ibm_cffps *psu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) const void *md = of_device_get_match_data(&client->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) const struct i2c_device_id *id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) if (md) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) vs = (enum versions)md;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) id = i2c_match_id(ibm_cffps_id, client);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) if (id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) vs = (enum versions)id->driver_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) if (vs == cffps_unknown) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) u16 ccin_revision = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) u16 ccin_version = CFFPS_CCIN_VERSION_1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) int ccin = i2c_smbus_read_word_swapped(client, CFFPS_CCIN_CMD);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) if (ccin > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) ccin_revision = FIELD_GET(CFFPS_CCIN_REVISION, ccin);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) ccin_version = FIELD_GET(CFFPS_CCIN_VERSION, ccin);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) switch (ccin_version) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) case CFFPS_CCIN_VERSION_1:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) vs = cffps1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) case CFFPS_CCIN_VERSION_2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) vs = cffps2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) case CFFPS_CCIN_VERSION_3:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) if (ccin_revision == CFFPS_CCIN_REVISION_LEGACY)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) vs = cffps1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) vs = cffps2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) /* Set the client name to include the version number. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) snprintf(client->name, I2C_NAME_SIZE, "cffps%d", vs + 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) client->dev.platform_data = &ibm_cffps_pdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) rc = pmbus_do_probe(client, &ibm_cffps_info[vs]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) * Don't fail the probe if there isn't enough memory for leds and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) * debugfs.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) psu = devm_kzalloc(&client->dev, sizeof(*psu), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) if (!psu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) psu->version = vs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) psu->client = client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) mutex_init(&psu->input_history.update_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) psu->input_history.last_update = jiffies - HZ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) ibm_cffps_create_led_class(psu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) /* Don't fail the probe if we can't create debugfs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) debugfs = pmbus_get_debugfs_dir(client);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) if (!debugfs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) ibm_cffps_dir = debugfs_create_dir(client->name, debugfs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) if (!ibm_cffps_dir)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) for (i = 0; i < CFFPS_DEBUGFS_NUM_ENTRIES; ++i)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) psu->debugfs_entries[i] = i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) debugfs_create_file("input_history", 0444, ibm_cffps_dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) &psu->debugfs_entries[CFFPS_DEBUGFS_INPUT_HISTORY],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) &ibm_cffps_fops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) debugfs_create_file("fru", 0444, ibm_cffps_dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) &psu->debugfs_entries[CFFPS_DEBUGFS_FRU],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) &ibm_cffps_fops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) debugfs_create_file("part_number", 0444, ibm_cffps_dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) &psu->debugfs_entries[CFFPS_DEBUGFS_PN],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) &ibm_cffps_fops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) debugfs_create_file("header", 0444, ibm_cffps_dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) &psu->debugfs_entries[CFFPS_DEBUGFS_HEADER],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) &ibm_cffps_fops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) debugfs_create_file("serial_number", 0444, ibm_cffps_dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) &psu->debugfs_entries[CFFPS_DEBUGFS_SN],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) &ibm_cffps_fops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) debugfs_create_file("max_power_out", 0444, ibm_cffps_dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) &psu->debugfs_entries[CFFPS_DEBUGFS_MAX_POWER_OUT],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) &ibm_cffps_fops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) debugfs_create_file("ccin", 0444, ibm_cffps_dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) &psu->debugfs_entries[CFFPS_DEBUGFS_CCIN],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) &ibm_cffps_fops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) debugfs_create_file("fw_version", 0444, ibm_cffps_dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) &psu->debugfs_entries[CFFPS_DEBUGFS_FW],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) &ibm_cffps_fops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) debugfs_create_file("on_off_config", 0644, ibm_cffps_dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) &psu->debugfs_entries[CFFPS_DEBUGFS_ON_OFF_CONFIG],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) &ibm_cffps_fops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) static const struct i2c_device_id ibm_cffps_id[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) { "ibm_cffps1", cffps1 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) { "ibm_cffps2", cffps2 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) { "ibm_cffps", cffps_unknown },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) {}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) MODULE_DEVICE_TABLE(i2c, ibm_cffps_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) static const struct of_device_id ibm_cffps_of_match[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) .compatible = "ibm,cffps1",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) .data = (void *)cffps1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) .compatible = "ibm,cffps2",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) .data = (void *)cffps2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) .compatible = "ibm,cffps",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) .data = (void *)cffps_unknown
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) {}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) MODULE_DEVICE_TABLE(of, ibm_cffps_of_match);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) static struct i2c_driver ibm_cffps_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) .name = "ibm-cffps",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) .of_match_table = ibm_cffps_of_match,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) .probe_new = ibm_cffps_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) .remove = pmbus_do_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) .id_table = ibm_cffps_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) module_i2c_driver(ibm_cffps_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) MODULE_AUTHOR("Eddie James");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) MODULE_DESCRIPTION("PMBus driver for IBM Common Form Factor power supplies");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) MODULE_LICENSE("GPL");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
3 Commits
0 Branches
0 Tags