Documentation/hwmon/zl6100.rst

   1 Kernel driver zl6100
   2 ====================
   3
   4 Supported chips:
   5
   6   * Renesas / Intersil / Zilker Labs ZL2004
   7
   8     Prefix: 'zl2004'
   9
  10     Addresses scanned: -
  11
  12     Datasheet: https://www.renesas.com/us/en/document/dst/zl2004-datasheet.pdf
  13
  14   * Renesas / Intersil / Zilker Labs ZL2005
  15
  16     Prefix: 'zl2005'
  17
  18     Addresses scanned: -
  19
  20     Datasheet: https://www.renesas.com/us/en/document/dst/zl2005-datasheet.pdf
  21
  22   * Renesas / Intersil / Zilker Labs ZL2006
  23
  24     Prefix: 'zl2006'
  25
  26     Addresses scanned: -
  27
  28     Datasheet: https://www.renesas.com/us/en/document/dst/zl2006-datasheet.pdf
  29
  30   * Renesas / Intersil / Zilker Labs ZL2008
  31
  32     Prefix: 'zl2008'
  33
  34     Addresses scanned: -
  35
  36     Datasheet: https://www.renesas.com/us/en/document/dst/zl2008-datasheet.pdf
  37
  38   * Renesas / Intersil / Zilker Labs ZL2105
  39
  40     Prefix: 'zl2105'
  41
  42     Addresses scanned: -
  43
  44     Datasheet: https://www.renesas.com/us/en/document/dst/zl2105-datasheet.pdf
  45
  46   * Renesas / Intersil / Zilker Labs ZL2106
  47
  48     Prefix: 'zl2106'
  49
  50     Addresses scanned: -
  51
  52     Datasheet: https://www.renesas.com/us/en/document/dst/zl2106-datasheet.pdf
  53
  54   * Renesas / Intersil / Zilker Labs ZL6100
  55
  56     Prefix: 'zl6100'
  57
  58     Addresses scanned: -
  59
  60     Datasheet: https://www.renesas.com/us/en/document/dst/zl6100-datasheet.pdf
  61
  62   * Renesas / Intersil / Zilker Labs ZL6105
  63
  64     Prefix: 'zl6105'
  65
  66     Addresses scanned: -
  67
  68     Datasheet: https://www.renesas.com/us/en/document/dst/zl6105-datasheet.pdf
  69
  70   * Renesas / Intersil / Zilker Labs ZL8802
  71
  72     Prefix: 'zl8802'
  73
  74     Addresses scanned: -
  75
  76     Datasheet: https://www.renesas.com/us/en/document/dst/zl8802-datasheet
  77
  78   * Renesas / Intersil / Zilker Labs ZL9101M
  79
  80     Prefix: 'zl9101'
  81
  82     Addresses scanned: -
  83
  84     Datasheet: https://www.renesas.com/us/en/document/dst/zl9101m-datasheet
  85
  86   * Renesas / Intersil / Zilker Labs ZL9117M
  87
  88     Prefix: 'zl9117'
  89
  90     Addresses scanned: -
  91
  92     Datasheet: https://www.renesas.com/us/en/document/dst/zl9117m-datasheet
  93
  94   * Renesas / Intersil / Zilker Labs ZLS1003, ZLS4009
  95
  96     Prefix: 'zls1003', zls4009
  97
  98     Addresses scanned: -
  99
 100     Datasheet: Not published
 101
 102   * Flex BMR450, BMR451
 103
 104     Prefix: 'bmr450', 'bmr451'
 105
 106     Addresses scanned: -
 107
 108     Datasheet:
 109
 110 https://flexpowermodules.com/resources/fpm-techspec-bmr450-digital-pol-regulators-20a
 111
 112   * Flex BMR462, BMR463, BMR464
 113
 114     Prefixes: 'bmr462', 'bmr463', 'bmr464'
 115
 116     Addresses scanned: -
 117
 118     Datasheet: https://flexpowermodules.com/resources/fpm-techspec-bmr462
 119
 120   * Flex BMR465, BMR467
 121
 122     Prefixes: 'bmr465', 'bmr467'
 123
 124     Addresses scanned: -
 125
 126     Datasheet: https://flexpowermodules.com/resources/fpm-techspec-bmr465-digital-pol
 127
 128   * Flex BMR466
 129
 130     Prefixes: 'bmr466'
 131
 132     Addresses scanned: -
 133
 134     Datasheet: https://flexpowermodules.com/resources/fpm-techspec-bmr466-8x12
 135
 136   * Flex BMR469
 137
 138     Prefixes: 'bmr469'
 139
 140     Addresses scanned: -
 141
 142     Datasheet: https://flexpowermodules.com/resources/fpm-techspec-bmr4696001
 143
 144 Author: Guenter Roeck <linux@roeck-us.net>
 145
 146
 147 Description
 148 -----------
 149
 150 This driver supports hardware monitoring for Renesas / Intersil / Zilker Labs
 151 ZL6100 and compatible digital DC-DC controllers.
 152
 153 The driver is a client driver to the core PMBus driver. Please see
 154 Documentation/hwmon/pmbus.rst and Documentation.hwmon/pmbus-core for details
 155 on PMBus client drivers.
 156
 157
 158 Usage Notes
 159 -----------
 160
 161 This driver does not auto-detect devices. You will have to instantiate the
 162 devices explicitly. Please see Documentation/i2c/instantiating-devices.rst for
 163 details.
 164
 165 .. warning::
 166
 167   Do not access chip registers using the i2cdump command, and do not use
 168   any of the i2ctools commands on a command register used to save and restore
 169   configuration data (0x11, 0x12, 0x15, 0x16, and 0xf4). The chips supported by
 170   this driver interpret any access to those command registers (including read
 171   commands) as request to execute the command in question. Unless write accesses
 172   to those registers are protected, this may result in power loss, board resets,
 173   and/or Flash corruption. Worst case, your board may turn into a brick.
 174
 175
 176 Platform data support
 177 ---------------------
 178
 179 The driver supports standard PMBus driver platform data.
 180
 181
 182 Module parameters
 183 -----------------
 184
 185 delay
 186 -----
 187
 188 Renesas/Intersil/Zilker Labs DC-DC controllers require a minimum interval
 189 between I2C bus accesses. According to Intersil, the minimum interval is 2 ms,
 190 though 1 ms appears to be sufficient and has not caused any problems in testing.
 191 The problem is known to affect all currently supported chips. For manual override,
 192 the driver provides a writeable module parameter, 'delay', which can be used
 193 to set the interval to a value between 0 and 65,535 microseconds.
 194
 195
 196 Sysfs entries
 197 -------------
 198
 199 The following attributes are supported. Limits are read-write; all other
 200 attributes are read-only.
 201
 202 ======================= ========================================================
 203 in1_label               "vin"
 204 in1_input               Measured input voltage.
 205 in1_min                 Minimum input voltage.
 206 in1_max                 Maximum input voltage.
 207 in1_lcrit               Critical minimum input voltage.
 208 in1_crit                Critical maximum input voltage.
 209 in1_min_alarm           Input voltage low alarm.
 210 in1_max_alarm           Input voltage high alarm.
 211 in1_lcrit_alarm         Input voltage critical low alarm.
 212 in1_crit_alarm          Input voltage critical high alarm.
 213
 214 in2_label               "vmon"
 215 in2_input               Measured voltage on VMON (ZL2004) or VDRV (ZL9101M,
 216                         ZL9117M) pin. Reported voltage is 16x the voltage on the
 217                         pin (adjusted internally by the chip).
 218 in2_lcrit               Critical minimum VMON/VDRV Voltage.
 219 in2_crit                Critical maximum VMON/VDRV voltage.
 220 in2_lcrit_alarm         VMON/VDRV voltage critical low alarm.
 221 in2_crit_alarm          VMON/VDRV voltage critical high alarm.
 222
 223                         vmon attributes are supported on ZL2004, ZL8802,
 224                         ZL9101M, ZL9117M and ZLS4009 only.
 225
 226 inX_label               "vout[12]"
 227 inX_input               Measured output voltage.
 228 inX_lcrit               Critical minimum output Voltage.
 229 inX_crit                Critical maximum output voltage.
 230 inX_lcrit_alarm         Critical output voltage critical low alarm.
 231 inX_crit_alarm          Critical output voltage critical high alarm.
 232
 233                         X is 3 for ZL2004, ZL9101M, and ZL9117M,
 234                         3, 4 for ZL8802 and 2 otherwise.
 235
 236 curr1_label             "iin"
 237 curr1_input             Measured input current.
 238
 239                         iin attributes are supported on ZL8802 only
 240
 241 currY_label             "iout[12]"
 242 currY_input             Measured output current.
 243 currY_lcrit             Critical minimum output current.
 244 currY_crit              Critical maximum output current.
 245 currY_lcrit_alarm       Output current critical low alarm.
 246 currY_crit_alarm        Output current critical high alarm.
 247
 248                         Y is 2, 3 for ZL8802, 1 otherwise
 249
 250 temp[12]_input          Measured temperature.
 251 temp[12]_min            Minimum temperature.
 252 temp[12]_max            Maximum temperature.
 253 temp[12]_lcrit          Critical low temperature.
 254 temp[12]_crit           Critical high temperature.
 255 temp[12]_min_alarm      Chip temperature low alarm.
 256 temp[12]_max_alarm      Chip temperature high alarm.
 257 temp[12]_lcrit_alarm    Chip temperature critical low alarm.
 258 temp[12]_crit_alarm     Chip temperature critical high alarm.
 259 ======================= ========================================================