Merge remote-tracking branch 'remotes/philmd/tags/pmbus-20220308' into staging

I²C / SMBus / PMBus patches

- Add some Renesas models
- Add Titus Rwantare to MAINTAINERS

# gpg: Signature made Tue 08 Mar 2022 18:11:46 GMT
# gpg:                using RSA key FAABE75E12917221DCFD6BB2E3E32C2CDEADC0DE
# gpg: Good signature from "Philippe Mathieu-Daudé (F4BUG) <f4bug@amsat.org>" [unknown]
# gpg: WARNING: This key is not certified with a trusted signature!
# gpg:          There is no indication that the signature belongs to the owner.
# Primary key fingerprint: FAAB E75E 1291 7221 DCFD  6BB2 E3E3 2C2C DEAD C0DE

* remotes/philmd/tags/pmbus-20220308:
  hw/sensor: add Renesas raa228000 device
  hw/sensor: add Renesas raa229004 PMBus device
  hw/sensor: add Intersil ISL69260 device model
  hw/i2c: Added linear mode translation for pmbus devices
  hw/i2c: pmbus: update MAINTAINERS
  hw/i2c: pmbus: refactor uint handling
  hw/i2c: pmbus: add PEC unsupported warning
  hw/i2c: pmbus: fix error returns and guard against out of range accesses
  hw/i2c: pmbus: add registers

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

1 files changed, 24 insertions, 1 deletions

diff --git a/include/hw/i2c/pmbus_device.h b/include/hw/i2c/pmbus_device.h
index 62bd38c83f..0f4d6b3fad 100644
--- a/include/hw/i2c/pmbus_device.h
+++ b/include/hw/i2c/pmbus_device.h
@@ -43,6 +43,7 @@ enum pmbus_registers {
     PMBUS_VOUT_DROOP                = 0x28, /* R/W word */
     PMBUS_VOUT_SCALE_LOOP           = 0x29, /* R/W word */
     PMBUS_VOUT_SCALE_MONITOR        = 0x2A, /* R/W word */
+    PMBUS_VOUT_MIN                  = 0x2B, /* R/W word */
     PMBUS_COEFFICIENTS              = 0x30, /* Read-only block 5 bytes */
     PMBUS_POUT_MAX                  = 0x31, /* R/W word */
     PMBUS_MAX_DUTY                  = 0x32, /* R/W word */
@@ -227,6 +228,8 @@ enum pmbus_registers {
 #define PB_MAX_PAGES            0x1F
 #define PB_ALL_PAGES            0xFF
 
+#define PMBUS_ERR_BYTE          0xFF
+
 #define TYPE_PMBUS_DEVICE "pmbus-device"
 OBJECT_DECLARE_TYPE(PMBusDevice, PMBusDeviceClass,
                     PMBUS_DEVICE)
@@ -255,6 +258,7 @@ OBJECT_DECLARE_TYPE(PMBusDevice, PMBusDeviceClass,
 #define PB_HAS_TEMP3               BIT_ULL(42)
 #define PB_HAS_TEMP_RATING         BIT_ULL(43)
 #define PB_HAS_MFR_INFO            BIT_ULL(50)
+#define PB_HAS_STATUS_MFR_SPECIFIC BIT_ULL(51)
 
 struct PMBusDeviceClass {
     SMBusDeviceClass parent_class;
@@ -295,6 +299,7 @@ typedef struct PMBusPage {
     uint16_t vout_droop;               /* R/W word */
     uint16_t vout_scale_loop;          /* R/W word */
     uint16_t vout_scale_monitor;       /* R/W word */
+    uint16_t vout_min;                 /* R/W word */
     uint8_t coefficients[5];           /* Read-only block 5 bytes */
     uint16_t pout_max;                 /* R/W word */
     uint16_t max_duty;                 /* R/W word */
@@ -443,7 +448,7 @@ typedef struct PMBusCoefficients {
  *
  * Y = (m * x - b) * 10^R
  *
- * @return uint32_t
+ * @return uint16_t
  */
 uint16_t pmbus_data2direct_mode(PMBusCoefficients c, uint32_t value);
 
@@ -457,6 +462,24 @@ uint16_t pmbus_data2direct_mode(PMBusCoefficients c, uint32_t value);
 uint32_t pmbus_direct_mode2data(PMBusCoefficients c, uint16_t value);
 
 /**
+ * Convert sensor values to linear mode format
+ *
+ * L = D * 2^(-e)
+ *
+ * @return uint16
+ */
+uint16_t pmbus_data2linear_mode(uint16_t value, int exp);
+
+/**
+ * Convert linear mode formatted data into sensor reading
+ *
+ * D = L * 2^e
+ *
+ * @return uint16
+ */
+uint16_t pmbus_linear_mode2data(uint16_t value, int exp);
+
+/**
  * @brief Send a block of data over PMBus
  * Assumes that the bytes in the block are already ordered correctly,
  * also assumes the length has been prepended to the block if necessary