[PATCH v3 0/9] This patch series contains updates to PMBus in QEMU along with some PMBus device models for Renesas regulators. I have also added myself to MAINTAINERS as this code is in use daily, where I am responsible for it.

[PATCH v3 0/9] This patch series contains updates to PMBus in QEMU along with some PMBus device models for Renesas regulators. I have also added myself to MAINTAINERS as this code is in use daily, where I am responsible for it.

[Titus Rwantare]

v2:
  - split PMBus commit with updates into individual fixes
  - renamed isl_pmbus[.ch] adding _vr for voltage regulators

v3:
  - split uint refactor commit and removed commit renaming files
  - rename rolled into preceding commits
  - update commit description for uint refactoring change

Shengtan Mao (1):
  hw/i2c: Added linear mode translation for pmbus devices

Titus Rwantare (8):
  hw/i2c: pmbus: add registers
  hw/i2c: pmbus: guard against out of range accesses
  hw/i2c: pmbus: add PEC unsupported warning
  hw/i2c: pmbus: refactor uint handling
  hw/i2c: pmbus: update MAINTAINERS
  hw/sensor: add Intersil ISL69260 device model
  hw/sensor: add Renesas raa229004 PMBus device
  hw/sensor: add Renesas raa228000 device

 MAINTAINERS                      |  13 +
 hw/arm/Kconfig                   |   1 +
 hw/i2c/pmbus_device.c            | 106 ++++++-
 hw/sensor/Kconfig                |   5 +
 hw/sensor/isl_pmbus_vr.c         | 279 ++++++++++++++++++
 hw/sensor/meson.build            |   1 +
 include/hw/i2c/pmbus_device.h    |  23 +-
 include/hw/sensor/isl_pmbus_vr.h |  52 ++++
 tests/qtest/isl_pmbus_vr-test.c  | 474 +++++++++++++++++++++++++++++++
 tests/qtest/meson.build          |   1 +
 10 files changed, 944 insertions(+), 11 deletions(-)
 create mode 100644 hw/sensor/isl_pmbus_vr.c
 create mode 100644 include/hw/sensor/isl_pmbus_vr.h
 create mode 100644 tests/qtest/isl_pmbus_vr-test.c

-- 
2.35.1.616.g0bdcbb4464-goog

[PATCH v3 1/9] hw/i2c: pmbus: add registers

[Titus Rwantare]

   - add the VOUT_MIN and STATUS_MFR registers

Signed-off-by: Titus Rwantare <titusr@google.com>
---
 hw/i2c/pmbus_device.c         | 24 ++++++++++++++++++++++++
 include/hw/i2c/pmbus_device.h |  3 +++
 2 files changed, 27 insertions(+)

diff --git a/hw/i2c/pmbus_device.c b/hw/i2c/pmbus_device.c
index 24f8f522d9..07a45c99f9 100644
--- a/hw/i2c/pmbus_device.c
+++ b/hw/i2c/pmbus_device.c
@@ -368,6 +368,14 @@ static uint8_t pmbus_receive_byte(SMBusDevice *smd)
         }
         break;
 
+    case PMBUS_VOUT_MIN:        /* R/W word */
+        if (pmdev->pages[index].page_flags & PB_HAS_VOUT_RATING) {
+            pmbus_send16(pmdev, pmdev->pages[index].vout_min);
+        } else {
+            goto passthough;
+        }
+        break;
+
     /* TODO: implement coefficients support */
 
     case PMBUS_POUT_MAX:                  /* R/W word */
@@ -708,6 +716,10 @@ static uint8_t pmbus_receive_byte(SMBusDevice *smd)
         pmbus_send8(pmdev, pmdev->pages[index].status_other);
         break;
 
+    case PMBUS_STATUS_MFR_SPECIFIC:       /* R/W byte */
+        pmbus_send8(pmdev, pmdev->pages[index].status_mfr_specific);
+        break;
+
     case PMBUS_READ_EIN:                  /* Read-Only block 5 bytes */
         if (pmdev->pages[index].page_flags & PB_HAS_EIN) {
             pmbus_send(pmdev, pmdev->pages[index].read_ein, 5);
@@ -1149,6 +1161,14 @@ static int pmbus_write_data(SMBusDevice *smd, uint8_t *buf, uint8_t len)
         }
         break;
 
+    case PMBUS_VOUT_MIN:                  /* R/W word */
+        if (pmdev->pages[index].page_flags & PB_HAS_VOUT_RATING) {
+            pmdev->pages[index].vout_min = pmbus_receive16(pmdev);
+        } else {
+            goto passthrough;
+        }
+        break;
+
     case PMBUS_POUT_MAX:                  /* R/W word */
         if (pmdev->pages[index].page_flags & PB_HAS_VOUT) {
             pmdev->pages[index].pout_max = pmbus_receive16(pmdev);
@@ -1482,6 +1502,10 @@ static int pmbus_write_data(SMBusDevice *smd, uint8_t *buf, uint8_t len)
         pmdev->pages[index].status_other = pmbus_receive8(pmdev);
         break;
 
+    case PMBUS_STATUS_MFR_SPECIFIC:        /* R/W byte */
+        pmdev->pages[index].status_mfr_specific = pmbus_receive8(pmdev);
+        break;
+
     case PMBUS_PAGE_PLUS_READ:            /* Block Read-only */
     case PMBUS_CAPABILITY:                /* Read-Only byte */
     case PMBUS_COEFFICIENTS:              /* Read-only block 5 bytes */
diff --git a/include/hw/i2c/pmbus_device.h b/include/hw/i2c/pmbus_device.h
index 62bd38c83f..72c0483149 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 */
@@ -255,6 +256,7 @@ 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 +297,7 @@ 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 */
-- 
2.35.1.616.g0bdcbb4464-goog

[PATCH v3 2/9] hw/i2c: pmbus: guard against out of range accesses

[Titus Rwantare]

Signed-off-by: Titus Rwantare <titusr@google.com>
---
 hw/i2c/pmbus_device.c | 41 ++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 40 insertions(+), 1 deletion(-)

diff --git a/hw/i2c/pmbus_device.c b/hw/i2c/pmbus_device.c
index 07a45c99f9..93c746bab3 100644
--- a/hw/i2c/pmbus_device.c
+++ b/hw/i2c/pmbus_device.c
@@ -243,18 +243,47 @@ void pmbus_check_limits(PMBusDevice *pmdev)
     }
 }
 
+/* assert the status_cml error upon receipt of malformed command */
+static void pmbus_cml_error(PMBusDevice *pmdev)
+{
+    for (int i = 0; i < pmdev->num_pages; i++) {
+        pmdev->pages[i].status_word |= PMBUS_STATUS_CML;
+        pmdev->pages[i].status_cml |= PB_CML_FAULT_INVALID_CMD;
+    }
+}
+
 static uint8_t pmbus_receive_byte(SMBusDevice *smd)
 {
     PMBusDevice *pmdev = PMBUS_DEVICE(smd);
     PMBusDeviceClass *pmdc = PMBUS_DEVICE_GET_CLASS(pmdev);
     uint8_t ret = 0xFF;
-    uint8_t index = pmdev->page;
+    uint8_t index;
 
     if (pmdev->out_buf_len != 0) {
         ret = pmbus_out_buf_pop(pmdev);
         return ret;
     }
 
+    /*
+     * Reading from all pages will return the value from page 0,
+     * this is unspecified behaviour in general.
+     */
+    if (pmdev->page == PB_ALL_PAGES) {
+        index = 0;
+        qemu_log_mask(LOG_GUEST_ERROR,
+                      "%s: tried to read from all pages\n",
+                      __func__);
+        pmbus_cml_error(pmdev);
+    } else if (pmdev->page > pmdev->num_pages - 1) {
+        qemu_log_mask(LOG_GUEST_ERROR,
+                      "%s: page %d is out of range\n",
+                      __func__, pmdev->page);
+        pmbus_cml_error(pmdev);
+        return -1;
+    } else {
+        index = pmdev->page;
+    }
+
     switch (pmdev->code) {
     case PMBUS_PAGE:
         pmbus_send8(pmdev, pmdev->page);
@@ -1038,6 +1067,7 @@ static int pmbus_write_data(SMBusDevice *smd, uint8_t *buf, uint8_t len)
         pmdev->page = pmbus_receive8(pmdev);
         return 0;
     }
+
     /* loop through all the pages when 0xFF is received */
     if (pmdev->page == PB_ALL_PAGES) {
         for (int i = 0; i < pmdev->num_pages; i++) {
@@ -1048,6 +1078,15 @@ static int pmbus_write_data(SMBusDevice *smd, uint8_t *buf, uint8_t len)
         return 0;
     }
 
+    if (pmdev->page > pmdev->num_pages - 1) {
+        qemu_log_mask(LOG_GUEST_ERROR,
+                        "%s: page %u is out of range\n",
+                        __func__, pmdev->page);
+        pmdev->page = 0; /* undefined behaviour - reset to page 0 */
+        pmbus_cml_error(pmdev);
+        return -1;
+    }
+
     index = pmdev->page;
 
     switch (pmdev->code) {
-- 
2.35.1.616.g0bdcbb4464-goog

[PATCH v3 3/9] hw/i2c: pmbus: add PEC unsupported warning

[Titus Rwantare]

Signed-off-by: Titus Rwantare <titusr@google.com>
---
 hw/i2c/pmbus_device.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/hw/i2c/pmbus_device.c b/hw/i2c/pmbus_device.c
index 93c746bab3..6eeb0731d7 100644
--- a/hw/i2c/pmbus_device.c
+++ b/hw/i2c/pmbus_device.c
@@ -307,6 +307,11 @@ static uint8_t pmbus_receive_byte(SMBusDevice *smd)
 
     case PMBUS_CAPABILITY:
         pmbus_send8(pmdev, pmdev->capability);
+        if (pmdev->capability & BIT(7)) {
+            qemu_log_mask(LOG_GUEST_ERROR,
+                          "%s: PEC is enabled but not yet supported.\n",
+                          __func__);
+        }
         break;
 
     case PMBUS_VOUT_MODE:                 /* R/W byte */
-- 
2.35.1.616.g0bdcbb4464-goog

[PATCH v3 4/9] hw/i2c: pmbus: refactor uint handling

[Titus Rwantare]

This change cleans up the inputs to pmbus_receive uint, the length of
received data is contained in PMBusDevice state and doesn't need to be
passed around.

Signed-off-by: Titus Rwantare <titusr@google.com>
---
 hw/i2c/pmbus_device.c | 18 +++++++++---------
 1 file changed, 9 insertions(+), 9 deletions(-)

diff --git a/hw/i2c/pmbus_device.c b/hw/i2c/pmbus_device.c
index 6eeb0731d7..3beb02afad 100644
--- a/hw/i2c/pmbus_device.c
+++ b/hw/i2c/pmbus_device.c
@@ -89,16 +89,16 @@ void pmbus_send_string(PMBusDevice *pmdev, const char *data)
 }
 
 
-static uint64_t pmbus_receive_uint(const uint8_t *buf, uint8_t len)
+static uint64_t pmbus_receive_uint(PMBusDevice *pmdev)
 {
     uint64_t ret = 0;
 
     /* Exclude command code from return value */
-    buf++;
-    len--;
+    pmdev->in_buf++;
+    pmdev->in_buf_len--;
 
-    for (int i = len - 1; i >= 0; i--) {
-        ret = ret << 8 | buf[i];
+    for (int i = pmdev->in_buf_len - 1; i >= 0; i--) {
+        ret = ret << 8 | pmdev->in_buf[i];
     }
     return ret;
 }
@@ -110,7 +110,7 @@ uint8_t pmbus_receive8(PMBusDevice *pmdev)
                       "%s: length mismatch. Expected 1 byte, got %d bytes\n",
                       __func__, pmdev->in_buf_len - 1);
     }
-    return pmbus_receive_uint(pmdev->in_buf, pmdev->in_buf_len);
+    return pmbus_receive_uint(pmdev);
 }
 
 uint16_t pmbus_receive16(PMBusDevice *pmdev)
@@ -120,7 +120,7 @@ uint16_t pmbus_receive16(PMBusDevice *pmdev)
                       "%s: length mismatch. Expected 2 bytes, got %d bytes\n",
                       __func__, pmdev->in_buf_len - 1);
     }
-    return pmbus_receive_uint(pmdev->in_buf, pmdev->in_buf_len);
+    return pmbus_receive_uint(pmdev);
 }
 
 uint32_t pmbus_receive32(PMBusDevice *pmdev)
@@ -130,7 +130,7 @@ uint32_t pmbus_receive32(PMBusDevice *pmdev)
                       "%s: length mismatch. Expected 4 bytes, got %d bytes\n",
                       __func__, pmdev->in_buf_len - 1);
     }
-    return pmbus_receive_uint(pmdev->in_buf, pmdev->in_buf_len);
+    return pmbus_receive_uint(pmdev);
 }
 
 uint64_t pmbus_receive64(PMBusDevice *pmdev)
@@ -140,7 +140,7 @@ uint64_t pmbus_receive64(PMBusDevice *pmdev)
                       "%s: length mismatch. Expected 8 bytes, got %d bytes\n",
                       __func__, pmdev->in_buf_len - 1);
     }
-    return pmbus_receive_uint(pmdev->in_buf, pmdev->in_buf_len);
+    return pmbus_receive_uint(pmdev);
 }
 
 static uint8_t pmbus_out_buf_pop(PMBusDevice *pmdev)
-- 
2.35.1.616.g0bdcbb4464-goog

[PATCH v3 5/9] hw/i2c: pmbus: update MAINTAINERS

[Titus Rwantare]

add self to MAINTAINERS for the PMBus subsystem and related sensors,
and set PMBus as maintained.

Signed-off-by: Titus Rwantare <titusr@google.com>
---
 MAINTAINERS | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/MAINTAINERS b/MAINTAINERS
index fa8adc2618..3601984b5d 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -3135,6 +3135,16 @@ F: include/hw/i2c/smbus_master.h
 F: include/hw/i2c/smbus_slave.h
 F: include/hw/i2c/smbus_eeprom.h
 
+PMBus
+M: Titus Rwantare <titusr@google.com>
+S: Maintained
+F: hw/i2c/pmbus_device.c
+F: hw/sensor/adm1272.c
+F: hw/sensor/max34451.c
+F: include/hw/i2c/pmbus_device.h
+F: tests/qtest/adm1272-test.c
+F: tests/qtest/max34451-test.c
+
 Firmware schema specifications
 M: Philippe Mathieu-Daudé <f4bug@amsat.org>
 R: Daniel P. Berrange <berrange@redhat.com>
-- 
2.35.1.616.g0bdcbb4464-goog

[PATCH v3 6/9] hw/i2c: Added linear mode translation for pmbus devices

[Titus Rwantare]

From: Shengtan Mao <stmao@google.com>

Signed-off-by: Shengtan Mao <stmao@google.com>
Reviewed-by: Titus Rwantare <titusr@google.com>
---
 hw/i2c/pmbus_device.c         | 18 ++++++++++++++++++
 include/hw/i2c/pmbus_device.h | 20 +++++++++++++++++++-
 2 files changed, 37 insertions(+), 1 deletion(-)

diff --git a/hw/i2c/pmbus_device.c b/hw/i2c/pmbus_device.c
index 3beb02afad..1036c41c49 100644
--- a/hw/i2c/pmbus_device.c
+++ b/hw/i2c/pmbus_device.c
@@ -28,6 +28,24 @@ uint32_t pmbus_direct_mode2data(PMBusCoefficients c, uint16_t value)
     return x;
 }
 
+uint16_t pmbus_data2linear_mode(uint16_t value, int exp)
+{
+    /* L = D * 2^(-e) */
+    if (exp < 0) {
+        return value << (-exp);
+    }
+    return value >> exp;
+}
+
+uint16_t pmbus_linear_mode2data(uint16_t value, int exp)
+{
+    /* D = L * 2^e */
+    if (exp < 0) {
+        return value >> (-exp);
+    }
+    return value << exp;
+}
+
 void pmbus_send(PMBusDevice *pmdev, const uint8_t *data, uint16_t len)
 {
     if (pmdev->out_buf_len + len > SMBUS_DATA_MAX_LEN) {
diff --git a/include/hw/i2c/pmbus_device.h b/include/hw/i2c/pmbus_device.h
index 72c0483149..9a274247ab 100644
--- a/include/hw/i2c/pmbus_device.h
+++ b/include/hw/i2c/pmbus_device.h
@@ -446,7 +446,7 @@ 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);
 
@@ -459,6 +459,24 @@ 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,
-- 
2.35.1.616.g0bdcbb4464-goog

[PATCH v3 7/9] hw/sensor: add Intersil ISL69260 device model

[Titus Rwantare]

Signed-off-by: Titus Rwantare <titusr@google.com>
Reviewed-by: Hao Wu <wuhaotsh@google.com>
---
 MAINTAINERS                      |   3 +
 hw/arm/Kconfig                   |   1 +
 hw/sensor/Kconfig                |   5 +
 hw/sensor/isl_pmbus_vr.c         | 211 +++++++++++++++++
 hw/sensor/meson.build            |   1 +
 include/hw/sensor/isl_pmbus_vr.h |  50 ++++
 tests/qtest/isl_pmbus_vr-test.c  | 394 +++++++++++++++++++++++++++++++
 tests/qtest/meson.build          |   1 +
 8 files changed, 666 insertions(+)
 create mode 100644 hw/sensor/isl_pmbus_vr.c
 create mode 100644 include/hw/sensor/isl_pmbus_vr.h
 create mode 100644 tests/qtest/isl_pmbus_vr-test.c

diff --git a/MAINTAINERS b/MAINTAINERS
index 3601984b5d..364a844045 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -3140,10 +3140,13 @@ M: Titus Rwantare <titusr@google.com>
 S: Maintained
 F: hw/i2c/pmbus_device.c
 F: hw/sensor/adm1272.c
+F: hw/sensor/isl_pmbus_vr.c
 F: hw/sensor/max34451.c
 F: include/hw/i2c/pmbus_device.h
+F: include/hw/sensor/isl_pmbus_vr.h
 F: tests/qtest/adm1272-test.c
 F: tests/qtest/max34451-test.c
+F: tests/qtest/isl_pmbus_vr-test.c
 
 Firmware schema specifications
 M: Philippe Mathieu-Daudé <f4bug@amsat.org>
diff --git a/hw/arm/Kconfig b/hw/arm/Kconfig
index 6945330030..97f3b38019 100644
--- a/hw/arm/Kconfig
+++ b/hw/arm/Kconfig
@@ -400,6 +400,7 @@ config NPCM7XX
     select SMBUS
     select AT24C  # EEPROM
     select MAX34451
+    select ISL_PMBUS_VR
     select PL310  # cache controller
     select PMBUS
     select SERIAL
diff --git a/hw/sensor/Kconfig b/hw/sensor/Kconfig
index 215944decc..a834d2f814 100644
--- a/hw/sensor/Kconfig
+++ b/hw/sensor/Kconfig
@@ -30,3 +30,8 @@ config LSM303DLHC_MAG
     bool
     depends on I2C
     default y if I2C_DEVICES
+
+config ISL_PMBUS_VR
+    bool
+    depends on I2C
+
diff --git a/hw/sensor/isl_pmbus_vr.c b/hw/sensor/isl_pmbus_vr.c
new file mode 100644
index 0000000000..b3d24e40ab
--- /dev/null
+++ b/hw/sensor/isl_pmbus_vr.c
@@ -0,0 +1,211 @@
+/*
+ * PMBus device for Renesas Digital Multiphase Voltage Regulators
+ *
+ * Copyright 2021 Google LLC
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#include "qemu/osdep.h"
+#include "hw/sensor/isl_pmbus_vr.h"
+#include "hw/qdev-properties.h"
+#include "qapi/visitor.h"
+#include "qemu/log.h"
+#include "qemu/module.h"
+
+static uint8_t isl_pmbus_vr_read_byte(PMBusDevice *pmdev)
+{
+    qemu_log_mask(LOG_GUEST_ERROR,
+                  "%s: reading from unsupported register: 0x%02x\n",
+                  __func__, pmdev->code);
+    return 0xFF;
+}
+
+static int isl_pmbus_vr_write_data(PMBusDevice *pmdev, const uint8_t *buf,
+                              uint8_t len)
+{
+    qemu_log_mask(LOG_GUEST_ERROR,
+                  "%s: write to unsupported register: 0x%02x\n",
+                  __func__, pmdev->code);
+    return 0xFF;
+}
+
+/* TODO: Implement coefficients support in pmbus_device.c for qmp */
+static void isl_pmbus_vr_get(Object *obj, Visitor *v, const char *name,
+                                     void *opaque, Error **errp)
+{
+    visit_type_uint16(v, name, (uint16_t *)opaque, errp);
+}
+
+static void isl_pmbus_vr_set(Object *obj, Visitor *v, const char *name,
+                                 void *opaque, Error **errp)
+{
+    PMBusDevice *pmdev = PMBUS_DEVICE(obj);
+    uint16_t *internal = opaque;
+    uint16_t value;
+    if (!visit_type_uint16(v, name, &value, errp)) {
+        return;
+    }
+
+    *internal = value;
+    pmbus_check_limits(pmdev);
+}
+
+static void isl_pmbus_vr_exit_reset(Object *obj)
+{
+    PMBusDevice *pmdev = PMBUS_DEVICE(obj);
+
+    pmdev->page = 0;
+    pmdev->capability = ISL_CAPABILITY_DEFAULT;
+    for (int i = 0; i < pmdev->num_pages; i++) {
+        pmdev->pages[i].operation = ISL_OPERATION_DEFAULT;
+        pmdev->pages[i].on_off_config = ISL_ON_OFF_CONFIG_DEFAULT;
+        pmdev->pages[i].vout_mode = ISL_VOUT_MODE_DEFAULT;
+        pmdev->pages[i].vout_command = ISL_VOUT_COMMAND_DEFAULT;
+        pmdev->pages[i].vout_max = ISL_VOUT_MAX_DEFAULT;
+        pmdev->pages[i].vout_margin_high = ISL_VOUT_MARGIN_HIGH_DEFAULT;
+        pmdev->pages[i].vout_margin_low = ISL_VOUT_MARGIN_LOW_DEFAULT;
+        pmdev->pages[i].vout_transition_rate = ISL_VOUT_TRANSITION_RATE_DEFAULT;
+        pmdev->pages[i].vout_ov_fault_limit = ISL_VOUT_OV_FAULT_LIMIT_DEFAULT;
+        pmdev->pages[i].ot_fault_limit = ISL_OT_FAULT_LIMIT_DEFAULT;
+        pmdev->pages[i].ot_warn_limit = ISL_OT_WARN_LIMIT_DEFAULT;
+        pmdev->pages[i].vin_ov_warn_limit = ISL_VIN_OV_WARN_LIMIT_DEFAULT;
+        pmdev->pages[i].vin_uv_warn_limit = ISL_VIN_UV_WARN_LIMIT_DEFAULT;
+        pmdev->pages[i].iin_oc_fault_limit = ISL_IIN_OC_FAULT_LIMIT_DEFAULT;
+        pmdev->pages[i].ton_delay = ISL_TON_DELAY_DEFAULT;
+        pmdev->pages[i].ton_rise = ISL_TON_RISE_DEFAULT;
+        pmdev->pages[i].toff_fall = ISL_TOFF_FALL_DEFAULT;
+        pmdev->pages[i].revision = ISL_REVISION_DEFAULT;
+
+        pmdev->pages[i].read_vout = ISL_READ_VOUT_DEFAULT;
+        pmdev->pages[i].read_iout = ISL_READ_IOUT_DEFAULT;
+        pmdev->pages[i].read_pout = ISL_READ_POUT_DEFAULT;
+        pmdev->pages[i].read_vin = ISL_READ_VIN_DEFAULT;
+        pmdev->pages[i].read_iin = ISL_READ_IIN_DEFAULT;
+        pmdev->pages[i].read_pin = ISL_READ_PIN_DEFAULT;
+        pmdev->pages[i].read_temperature_1 = ISL_READ_TEMP_DEFAULT;
+        pmdev->pages[i].read_temperature_2 = ISL_READ_TEMP_DEFAULT;
+        pmdev->pages[i].read_temperature_3 = ISL_READ_TEMP_DEFAULT;
+    }
+}
+
+static void isl_pmbus_vr_add_props(Object *obj, uint64_t *flags, uint8_t pages)
+{
+    PMBusDevice *pmdev = PMBUS_DEVICE(obj);
+    for (int i = 0; i < pages; i++) {
+        if (flags[i] & PB_HAS_VIN) {
+            object_property_add(obj, "vin[*]", "uint16",
+                                isl_pmbus_vr_get,
+                                isl_pmbus_vr_set,
+                                NULL, &pmdev->pages[i].read_vin);
+        }
+
+        if (flags[i] & PB_HAS_VOUT) {
+            object_property_add(obj, "vout[*]", "uint16",
+                                isl_pmbus_vr_get,
+                                isl_pmbus_vr_set,
+                                NULL, &pmdev->pages[i].read_vout);
+        }
+
+        if (flags[i] & PB_HAS_IIN) {
+            object_property_add(obj, "iin[*]", "uint16",
+                                isl_pmbus_vr_get,
+                                isl_pmbus_vr_set,
+                                NULL, &pmdev->pages[i].read_iin);
+        }
+
+        if (flags[i] & PB_HAS_IOUT) {
+            object_property_add(obj, "iout[*]", "uint16",
+                                isl_pmbus_vr_get,
+                                isl_pmbus_vr_set,
+                                NULL, &pmdev->pages[i].read_iout);
+        }
+
+        if (flags[i] & PB_HAS_PIN) {
+            object_property_add(obj, "pin[*]", "uint16",
+                                isl_pmbus_vr_get,
+                                isl_pmbus_vr_set,
+                                NULL, &pmdev->pages[i].read_pin);
+        }
+
+        if (flags[i] & PB_HAS_POUT) {
+            object_property_add(obj, "pout[*]", "uint16",
+                                isl_pmbus_vr_get,
+                                isl_pmbus_vr_set,
+                                NULL, &pmdev->pages[i].read_pout);
+        }
+
+        if (flags[i] & PB_HAS_TEMPERATURE) {
+            object_property_add(obj, "temp1[*]", "uint16",
+                                isl_pmbus_vr_get,
+                                isl_pmbus_vr_set,
+                                NULL, &pmdev->pages[i].read_temperature_1);
+        }
+
+        if (flags[i] & PB_HAS_TEMP2) {
+            object_property_add(obj, "temp2[*]", "uint16",
+                                isl_pmbus_vr_get,
+                                isl_pmbus_vr_set,
+                                NULL, &pmdev->pages[i].read_temperature_2);
+        }
+
+        if (flags[i] & PB_HAS_TEMP3) {
+            object_property_add(obj, "temp3[*]", "uint16",
+                                isl_pmbus_vr_get,
+                                isl_pmbus_vr_set,
+                                NULL, &pmdev->pages[i].read_temperature_3);
+        }
+    }
+}
+
+static void raa22xx_init(Object *obj)
+{
+    PMBusDevice *pmdev = PMBUS_DEVICE(obj);
+    uint64_t flags[2];
+
+    flags[0] = PB_HAS_VIN | PB_HAS_VOUT | PB_HAS_VOUT_MODE |
+               PB_HAS_VOUT_RATING | PB_HAS_VOUT_MARGIN | PB_HAS_IIN |
+               PB_HAS_IOUT | PB_HAS_PIN | PB_HAS_POUT | PB_HAS_TEMPERATURE |
+               PB_HAS_TEMP2 | PB_HAS_TEMP3 | PB_HAS_STATUS_MFR_SPECIFIC;
+    flags[1] = PB_HAS_IIN | PB_HAS_PIN | PB_HAS_TEMPERATURE | PB_HAS_TEMP3 |
+               PB_HAS_VOUT | PB_HAS_VOUT_MODE | PB_HAS_VOUT_MARGIN |
+               PB_HAS_VOUT_RATING | PB_HAS_IOUT | PB_HAS_POUT |
+               PB_HAS_STATUS_MFR_SPECIFIC;
+
+    pmbus_page_config(pmdev, 0, flags[0]);
+    pmbus_page_config(pmdev, 1, flags[1]);
+    isl_pmbus_vr_add_props(obj, flags, 2);
+}
+
+static void isl_pmbus_vr_class_init(ObjectClass *klass, void *data,
+                                    uint8_t pages)
+{
+    PMBusDeviceClass *k = PMBUS_DEVICE_CLASS(klass);
+    k->write_data = isl_pmbus_vr_write_data;
+    k->receive_byte = isl_pmbus_vr_read_byte;
+    k->device_num_pages = pages;
+}
+
+static void isl69260_class_init(ObjectClass *klass, void *data)
+{
+    ResettableClass *rc = RESETTABLE_CLASS(klass);
+    DeviceClass *dc = DEVICE_CLASS(klass);
+    dc->desc = "Renesas ISL69260 Digital Multiphase Voltage Regulator";
+    rc->phases.exit = isl_pmbus_vr_exit_reset;
+    isl_pmbus_vr_class_init(klass, data, 2);
+}
+
+static const TypeInfo isl69260_info = {
+    .name = TYPE_ISL69260,
+    .parent = TYPE_PMBUS_DEVICE,
+    .instance_size = sizeof(ISLState),
+    .instance_init = raa22xx_init,
+    .class_init = isl69260_class_init,
+};
+
+static void isl_pmbus_vr_register_types(void)
+{
+    type_register_static(&isl69260_info);
+}
+
+type_init(isl_pmbus_vr_register_types)
diff --git a/hw/sensor/meson.build b/hw/sensor/meson.build
index d1bba290da..12b6992bc8 100644
--- a/hw/sensor/meson.build
+++ b/hw/sensor/meson.build
@@ -5,3 +5,4 @@ softmmu_ss.add(when: 'CONFIG_EMC141X', if_true: files('emc141x.c'))
 softmmu_ss.add(when: 'CONFIG_ADM1272', if_true: files('adm1272.c'))
 softmmu_ss.add(when: 'CONFIG_MAX34451', if_true: files('max34451.c'))
 softmmu_ss.add(when: 'CONFIG_LSM303DLHC_MAG', if_true: files('lsm303dlhc_mag.c'))
+softmmu_ss.add(when: 'CONFIG_ISL_PMBUS_VR', if_true: files('isl_pmbus_vr.c'))
diff --git a/include/hw/sensor/isl_pmbus_vr.h b/include/hw/sensor/isl_pmbus_vr.h
new file mode 100644
index 0000000000..4e12e95efb
--- /dev/null
+++ b/include/hw/sensor/isl_pmbus_vr.h
@@ -0,0 +1,50 @@
+/*
+ * PMBus device for Renesas Digital Multiphase Voltage Regulators
+ *
+ * Copyright 2022 Google LLC
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#ifndef HW_MISC_ISL_PMBUS_VR_H
+#define HW_MISC_ISL_PMBUS_VR_H
+
+#include "hw/i2c/pmbus_device.h"
+#include "qom/object.h"
+
+#define TYPE_ISL69260   "isl69260"
+
+struct ISLState {
+    PMBusDevice parent;
+};
+
+OBJECT_DECLARE_SIMPLE_TYPE(ISLState, ISL69260)
+
+#define ISL_CAPABILITY_DEFAULT                 0x40
+#define ISL_OPERATION_DEFAULT                  0x80
+#define ISL_ON_OFF_CONFIG_DEFAULT              0x16
+#define ISL_VOUT_MODE_DEFAULT                  0x40
+#define ISL_VOUT_COMMAND_DEFAULT               0x0384
+#define ISL_VOUT_MAX_DEFAULT                   0x08FC
+#define ISL_VOUT_MARGIN_HIGH_DEFAULT           0x0640
+#define ISL_VOUT_MARGIN_LOW_DEFAULT            0xFA
+#define ISL_VOUT_TRANSITION_RATE_DEFAULT       0x64
+#define ISL_VOUT_OV_FAULT_LIMIT_DEFAULT        0x076C
+#define ISL_OT_FAULT_LIMIT_DEFAULT             0x7D
+#define ISL_OT_WARN_LIMIT_DEFAULT              0x07D0
+#define ISL_VIN_OV_WARN_LIMIT_DEFAULT          0x36B0
+#define ISL_VIN_UV_WARN_LIMIT_DEFAULT          0x1F40
+#define ISL_IIN_OC_FAULT_LIMIT_DEFAULT         0x32
+#define ISL_TON_DELAY_DEFAULT                  0x14
+#define ISL_TON_RISE_DEFAULT                   0x01F4
+#define ISL_TOFF_FALL_DEFAULT                  0x01F4
+#define ISL_REVISION_DEFAULT                   0x33
+#define ISL_READ_VOUT_DEFAULT                  1000
+#define ISL_READ_IOUT_DEFAULT                  40
+#define ISL_READ_POUT_DEFAULT                  4
+#define ISL_READ_TEMP_DEFAULT                  25
+#define ISL_READ_VIN_DEFAULT                   1100
+#define ISL_READ_IIN_DEFAULT                   40
+#define ISL_READ_PIN_DEFAULT                   4
+
+#endif
diff --git a/tests/qtest/isl_pmbus_vr-test.c b/tests/qtest/isl_pmbus_vr-test.c
new file mode 100644
index 0000000000..f77732ae96
--- /dev/null
+++ b/tests/qtest/isl_pmbus_vr-test.c
@@ -0,0 +1,394 @@
+/*
+ * QTests for the ISL_PMBUS digital voltage regulators
+ *
+ * Copyright 2021 Google LLC
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * for more details.
+ */
+
+#include "qemu/osdep.h"
+#include <math.h>
+#include "hw/i2c/pmbus_device.h"
+#include "hw/sensor/isl_pmbus_vr.h"
+#include "libqtest-single.h"
+#include "libqos/qgraph.h"
+#include "libqos/i2c.h"
+#include "qapi/qmp/qdict.h"
+#include "qapi/qmp/qnum.h"
+#include "qemu/bitops.h"
+
+#define TEST_ID "isl_pmbus_vr-test"
+#define TEST_ADDR (0x43)
+
+static uint16_t qmp_isl_pmbus_vr_get(const char *id, const char *property)
+{
+    QDict *response;
+    uint64_t ret;
+
+    response = qmp("{ 'execute': 'qom-get', 'arguments': { 'path': %s, "
+                   "'property': %s } }", id, property);
+    g_assert(qdict_haskey(response, "return"));
+    ret = qnum_get_uint(qobject_to(QNum, qdict_get(response, "return")));
+    qobject_unref(response);
+    return ret;
+}
+
+static void qmp_isl_pmbus_vr_set(const char *id,
+                            const char *property,
+                            uint16_t value)
+{
+    QDict *response;
+
+    response = qmp("{ 'execute': 'qom-set', 'arguments': { 'path': %s, "
+                   "'property': %s, 'value': %u } }", id, property, value);
+    g_assert(qdict_haskey(response, "return"));
+    qobject_unref(response);
+}
+
+/* PMBus commands are little endian vs i2c_set16 in i2c.h which is big endian */
+static uint16_t isl_pmbus_vr_i2c_get16(QI2CDevice *i2cdev, uint8_t reg)
+{
+    uint8_t resp[2];
+    i2c_read_block(i2cdev, reg, resp, sizeof(resp));
+    return (resp[1] << 8) | resp[0];
+}
+
+/* PMBus commands are little endian vs i2c_set16 in i2c.h which is big endian */
+static void isl_pmbus_vr_i2c_set16(QI2CDevice *i2cdev, uint8_t reg,
+                                   uint16_t value)
+{
+    uint8_t data[2];
+
+    data[0] = value & 255;
+    data[1] = value >> 8;
+    i2c_write_block(i2cdev, reg, data, sizeof(data));
+}
+
+static void test_defaults(void *obj, void *data, QGuestAllocator *alloc)
+{
+    uint16_t value, i2c_value;
+    QI2CDevice *i2cdev = (QI2CDevice *)obj;
+
+    value = qmp_isl_pmbus_vr_get(TEST_ID, "vout[0]");
+    g_assert_cmpuint(value, ==, ISL_READ_VOUT_DEFAULT);
+
+    i2c_value = isl_pmbus_vr_i2c_get16(i2cdev, PMBUS_READ_IOUT);
+    g_assert_cmpuint(i2c_value, ==, ISL_READ_IOUT_DEFAULT);
+
+    value = qmp_isl_pmbus_vr_get(TEST_ID, "pout[0]");
+    g_assert_cmpuint(value, ==, ISL_READ_POUT_DEFAULT);
+
+    i2c_value = isl_pmbus_vr_i2c_get16(i2cdev, PMBUS_READ_VIN);
+    g_assert_cmpuint(i2c_value, ==, ISL_READ_VIN_DEFAULT);
+
+    value = qmp_isl_pmbus_vr_get(TEST_ID, "iin[0]");
+    g_assert_cmpuint(value, ==, ISL_READ_IIN_DEFAULT);
+
+    i2c_value = isl_pmbus_vr_i2c_get16(i2cdev, PMBUS_READ_PIN);
+    g_assert_cmpuint(i2c_value, ==, ISL_READ_PIN_DEFAULT);
+
+    value = qmp_isl_pmbus_vr_get(TEST_ID, "temp1[0]");
+    g_assert_cmpuint(value, ==, ISL_READ_TEMP_DEFAULT);
+
+    i2c_value = isl_pmbus_vr_i2c_get16(i2cdev, PMBUS_READ_TEMPERATURE_2);
+    g_assert_cmpuint(i2c_value, ==, ISL_READ_TEMP_DEFAULT);
+
+    i2c_value = i2c_get8(i2cdev, PMBUS_CAPABILITY);
+    g_assert_cmphex(i2c_value, ==, ISL_CAPABILITY_DEFAULT);
+
+    i2c_value = i2c_get8(i2cdev, PMBUS_OPERATION);
+    g_assert_cmphex(i2c_value, ==, ISL_OPERATION_DEFAULT);
+
+    i2c_value = i2c_get8(i2cdev, PMBUS_ON_OFF_CONFIG);
+    g_assert_cmphex(i2c_value, ==, ISL_ON_OFF_CONFIG_DEFAULT);
+
+    i2c_value = i2c_get8(i2cdev, PMBUS_VOUT_MODE);
+    g_assert_cmphex(i2c_value, ==, ISL_VOUT_MODE_DEFAULT);
+
+    i2c_value = isl_pmbus_vr_i2c_get16(i2cdev, PMBUS_VOUT_COMMAND);
+    g_assert_cmphex(i2c_value, ==, ISL_VOUT_COMMAND_DEFAULT);
+
+    i2c_value = isl_pmbus_vr_i2c_get16(i2cdev, PMBUS_VOUT_MAX);
+    g_assert_cmphex(i2c_value, ==, ISL_VOUT_MAX_DEFAULT);
+
+    i2c_value = isl_pmbus_vr_i2c_get16(i2cdev, PMBUS_VOUT_MARGIN_HIGH);
+    g_assert_cmphex(i2c_value, ==, ISL_VOUT_MARGIN_HIGH_DEFAULT);
+
+    i2c_value = isl_pmbus_vr_i2c_get16(i2cdev, PMBUS_VOUT_MARGIN_LOW);
+    g_assert_cmphex(i2c_value, ==, ISL_VOUT_MARGIN_LOW_DEFAULT);
+
+    i2c_value = isl_pmbus_vr_i2c_get16(i2cdev, PMBUS_VOUT_TRANSITION_RATE);
+    g_assert_cmphex(i2c_value, ==, ISL_VOUT_TRANSITION_RATE_DEFAULT);
+
+    i2c_value = isl_pmbus_vr_i2c_get16(i2cdev, PMBUS_VOUT_OV_FAULT_LIMIT);
+    g_assert_cmphex(i2c_value, ==, ISL_VOUT_OV_FAULT_LIMIT_DEFAULT);
+
+    i2c_value = isl_pmbus_vr_i2c_get16(i2cdev, PMBUS_OT_FAULT_LIMIT);
+    g_assert_cmphex(i2c_value, ==, ISL_OT_FAULT_LIMIT_DEFAULT);
+
+    i2c_value = isl_pmbus_vr_i2c_get16(i2cdev, PMBUS_OT_WARN_LIMIT);
+    g_assert_cmphex(i2c_value, ==, ISL_OT_WARN_LIMIT_DEFAULT);
+
+    i2c_value = isl_pmbus_vr_i2c_get16(i2cdev, PMBUS_VIN_OV_WARN_LIMIT);
+    g_assert_cmphex(i2c_value, ==, ISL_VIN_OV_WARN_LIMIT_DEFAULT);
+
+    i2c_value = isl_pmbus_vr_i2c_get16(i2cdev, PMBUS_VIN_UV_WARN_LIMIT);
+    g_assert_cmphex(i2c_value, ==, ISL_VIN_UV_WARN_LIMIT_DEFAULT);
+
+    i2c_value = isl_pmbus_vr_i2c_get16(i2cdev, PMBUS_IIN_OC_FAULT_LIMIT);
+    g_assert_cmphex(i2c_value, ==, ISL_IIN_OC_FAULT_LIMIT_DEFAULT);
+
+    i2c_value = i2c_get8(i2cdev, PMBUS_REVISION);
+    g_assert_cmphex(i2c_value, ==, ISL_REVISION_DEFAULT);
+}
+
+/* test qmp access */
+static void test_tx_rx(void *obj, void *data, QGuestAllocator *alloc)
+{
+    uint16_t i2c_value, value;
+    QI2CDevice *i2cdev = (QI2CDevice *)obj;
+
+    qmp_isl_pmbus_vr_set(TEST_ID, "vin[0]", 200);
+    value = qmp_isl_pmbus_vr_get(TEST_ID, "vin[0]");
+    i2c_value = isl_pmbus_vr_i2c_get16(i2cdev, PMBUS_READ_VIN);
+    g_assert_cmpuint(value, ==, i2c_value);
+
+    qmp_isl_pmbus_vr_set(TEST_ID, "vout[0]", 2500);
+    value = qmp_isl_pmbus_vr_get(TEST_ID, "vout[0]");
+    i2c_value = isl_pmbus_vr_i2c_get16(i2cdev, PMBUS_READ_VOUT);
+    g_assert_cmpuint(value, ==, i2c_value);
+
+    qmp_isl_pmbus_vr_set(TEST_ID, "iin[0]", 300);
+    value = qmp_isl_pmbus_vr_get(TEST_ID, "iin[0]");
+    i2c_value = isl_pmbus_vr_i2c_get16(i2cdev, PMBUS_READ_IIN);
+    g_assert_cmpuint(value, ==, i2c_value);
+
+    qmp_isl_pmbus_vr_set(TEST_ID, "iout[0]", 310);
+    value = qmp_isl_pmbus_vr_get(TEST_ID, "iout[0]");
+    i2c_value = isl_pmbus_vr_i2c_get16(i2cdev, PMBUS_READ_IOUT);
+    g_assert_cmpuint(value, ==, i2c_value);
+
+    qmp_isl_pmbus_vr_set(TEST_ID, "pin[0]", 100);
+    value = qmp_isl_pmbus_vr_get(TEST_ID, "pin[0]");
+    i2c_value = isl_pmbus_vr_i2c_get16(i2cdev, PMBUS_READ_PIN);
+    g_assert_cmpuint(value, ==, i2c_value);
+
+    qmp_isl_pmbus_vr_set(TEST_ID, "pout[0]", 95);
+    value = qmp_isl_pmbus_vr_get(TEST_ID, "pout[0]");
+    i2c_value = isl_pmbus_vr_i2c_get16(i2cdev, PMBUS_READ_POUT);
+    g_assert_cmpuint(value, ==, i2c_value);
+
+    qmp_isl_pmbus_vr_set(TEST_ID, "temp1[0]", 26);
+    value = qmp_isl_pmbus_vr_get(TEST_ID, "temp1[0]");
+    i2c_value = isl_pmbus_vr_i2c_get16(i2cdev, PMBUS_READ_TEMPERATURE_1);
+    g_assert_cmpuint(value, ==, i2c_value);
+
+    qmp_isl_pmbus_vr_set(TEST_ID, "temp2[0]", 27);
+    value = qmp_isl_pmbus_vr_get(TEST_ID, "temp2[0]");
+    i2c_value = isl_pmbus_vr_i2c_get16(i2cdev, PMBUS_READ_TEMPERATURE_2);
+    g_assert_cmpuint(value, ==, i2c_value);
+
+    qmp_isl_pmbus_vr_set(TEST_ID, "temp3[0]", 28);
+    value = qmp_isl_pmbus_vr_get(TEST_ID, "temp3[0]");
+    i2c_value = isl_pmbus_vr_i2c_get16(i2cdev, PMBUS_READ_TEMPERATURE_3);
+    g_assert_cmpuint(value, ==, i2c_value);
+
+}
+
+/* test r/w registers */
+static void test_rw_regs(void *obj, void *data, QGuestAllocator *alloc)
+{
+    uint16_t i2c_value;
+    QI2CDevice *i2cdev = (QI2CDevice *)obj;
+
+    isl_pmbus_vr_i2c_set16(i2cdev, PMBUS_VOUT_COMMAND, 0x1234);
+    i2c_value = isl_pmbus_vr_i2c_get16(i2cdev, PMBUS_VOUT_COMMAND);
+    g_assert_cmphex(i2c_value, ==, 0x1234);
+
+    isl_pmbus_vr_i2c_set16(i2cdev, PMBUS_VOUT_TRIM, 0x4567);
+    i2c_value = isl_pmbus_vr_i2c_get16(i2cdev, PMBUS_VOUT_TRIM);
+    g_assert_cmphex(i2c_value, ==, 0x4567);
+
+    isl_pmbus_vr_i2c_set16(i2cdev, PMBUS_VOUT_MAX, 0x9876);
+    i2c_value = isl_pmbus_vr_i2c_get16(i2cdev, PMBUS_VOUT_MAX);
+    g_assert_cmphex(i2c_value, ==, 0x9876);
+
+    isl_pmbus_vr_i2c_set16(i2cdev, PMBUS_VOUT_MARGIN_HIGH, 0xABCD);
+    i2c_value = isl_pmbus_vr_i2c_get16(i2cdev, PMBUS_VOUT_MARGIN_HIGH);
+    g_assert_cmphex(i2c_value, ==, 0xABCD);
+
+    isl_pmbus_vr_i2c_set16(i2cdev, PMBUS_VOUT_MARGIN_LOW, 0xA1B2);
+    i2c_value = isl_pmbus_vr_i2c_get16(i2cdev, PMBUS_VOUT_MARGIN_LOW);
+    g_assert_cmphex(i2c_value, ==, 0xA1B2);
+
+    isl_pmbus_vr_i2c_set16(i2cdev, PMBUS_VOUT_TRANSITION_RATE, 0xDEF1);
+    i2c_value = isl_pmbus_vr_i2c_get16(i2cdev, PMBUS_VOUT_TRANSITION_RATE);
+    g_assert_cmphex(i2c_value, ==, 0xDEF1);
+
+    isl_pmbus_vr_i2c_set16(i2cdev, PMBUS_VOUT_DROOP, 0x5678);
+    i2c_value = isl_pmbus_vr_i2c_get16(i2cdev, PMBUS_VOUT_DROOP);
+    g_assert_cmphex(i2c_value, ==, 0x5678);
+
+    isl_pmbus_vr_i2c_set16(i2cdev, PMBUS_VOUT_MIN, 0x1234);
+    i2c_value = isl_pmbus_vr_i2c_get16(i2cdev, PMBUS_VOUT_MIN);
+    g_assert_cmphex(i2c_value, ==, 0x1234);
+
+    isl_pmbus_vr_i2c_set16(i2cdev, PMBUS_VOUT_OV_FAULT_LIMIT, 0x2345);
+    i2c_value = isl_pmbus_vr_i2c_get16(i2cdev, PMBUS_VOUT_OV_FAULT_LIMIT);
+    g_assert_cmphex(i2c_value, ==, 0x2345);
+
+    isl_pmbus_vr_i2c_set16(i2cdev, PMBUS_VOUT_UV_FAULT_LIMIT, 0xFA12);
+    i2c_value = isl_pmbus_vr_i2c_get16(i2cdev, PMBUS_VOUT_UV_FAULT_LIMIT);
+    g_assert_cmphex(i2c_value, ==, 0xFA12);
+
+    isl_pmbus_vr_i2c_set16(i2cdev, PMBUS_OT_FAULT_LIMIT, 0xF077);
+    i2c_value = isl_pmbus_vr_i2c_get16(i2cdev, PMBUS_OT_FAULT_LIMIT);
+    g_assert_cmphex(i2c_value, ==, 0xF077);
+
+    isl_pmbus_vr_i2c_set16(i2cdev, PMBUS_OT_WARN_LIMIT, 0x7137);
+    i2c_value = isl_pmbus_vr_i2c_get16(i2cdev, PMBUS_OT_WARN_LIMIT);
+    g_assert_cmphex(i2c_value, ==, 0x7137);
+
+    isl_pmbus_vr_i2c_set16(i2cdev, PMBUS_VIN_OV_FAULT_LIMIT, 0x3456);
+    i2c_value = isl_pmbus_vr_i2c_get16(i2cdev, PMBUS_VIN_OV_FAULT_LIMIT);
+    g_assert_cmphex(i2c_value, ==, 0x3456);
+
+    isl_pmbus_vr_i2c_set16(i2cdev, PMBUS_VIN_UV_FAULT_LIMIT, 0xBADA);
+    i2c_value = isl_pmbus_vr_i2c_get16(i2cdev, PMBUS_VIN_UV_FAULT_LIMIT);
+    g_assert_cmphex(i2c_value, ==, 0xBADA);
+
+    isl_pmbus_vr_i2c_set16(i2cdev, PMBUS_IIN_OC_FAULT_LIMIT, 0xB1B0);
+    i2c_value = isl_pmbus_vr_i2c_get16(i2cdev, PMBUS_IIN_OC_FAULT_LIMIT);
+    g_assert_cmphex(i2c_value, ==, 0xB1B0);
+
+    i2c_set8(i2cdev, PMBUS_OPERATION, 0xA);
+    i2c_value = i2c_get8(i2cdev, PMBUS_OPERATION);
+    g_assert_cmphex(i2c_value, ==, 0xA);
+
+    i2c_set8(i2cdev, PMBUS_ON_OFF_CONFIG, 0x42);
+    i2c_value = i2c_get8(i2cdev, PMBUS_ON_OFF_CONFIG);
+    g_assert_cmphex(i2c_value, ==, 0x42);
+}
+
+/* test that devices with multiple pages can switch between them */
+static void test_pages_rw(void *obj, void *data, QGuestAllocator *alloc)
+{
+    uint16_t i2c_value;
+    QI2CDevice *i2cdev = (QI2CDevice *)obj;
+
+    i2c_set8(i2cdev, PMBUS_PAGE, 1);
+    i2c_value = i2c_get8(i2cdev, PMBUS_PAGE);
+    g_assert_cmphex(i2c_value, ==, 1);
+
+    i2c_set8(i2cdev, PMBUS_PAGE, 0);
+    i2c_value = i2c_get8(i2cdev, PMBUS_PAGE);
+    g_assert_cmphex(i2c_value, ==, 0);
+}
+
+/* test read-only registers */
+static void test_ro_regs(void *obj, void *data, QGuestAllocator *alloc)
+{
+    uint16_t i2c_init_value, i2c_value;
+    QI2CDevice *i2cdev = (QI2CDevice *)obj;
+
+    i2c_init_value = isl_pmbus_vr_i2c_get16(i2cdev, PMBUS_READ_VIN);
+    isl_pmbus_vr_i2c_set16(i2cdev, PMBUS_READ_VIN, 0xBEEF);
+    i2c_value = isl_pmbus_vr_i2c_get16(i2cdev, PMBUS_READ_VIN);
+    g_assert_cmphex(i2c_init_value, ==, i2c_value);
+
+    i2c_init_value = isl_pmbus_vr_i2c_get16(i2cdev, PMBUS_READ_IIN);
+    isl_pmbus_vr_i2c_set16(i2cdev, PMBUS_READ_IIN, 0xB00F);
+    i2c_value = isl_pmbus_vr_i2c_get16(i2cdev, PMBUS_READ_IIN);
+    g_assert_cmphex(i2c_init_value, ==, i2c_value);
+
+    i2c_init_value = isl_pmbus_vr_i2c_get16(i2cdev, PMBUS_READ_VOUT);
+    isl_pmbus_vr_i2c_set16(i2cdev, PMBUS_READ_VOUT, 0x1234);
+    i2c_value = isl_pmbus_vr_i2c_get16(i2cdev, PMBUS_READ_VOUT);
+    g_assert_cmphex(i2c_init_value, ==, i2c_value);
+
+    i2c_init_value = isl_pmbus_vr_i2c_get16(i2cdev, PMBUS_READ_IOUT);
+    isl_pmbus_vr_i2c_set16(i2cdev, PMBUS_READ_IOUT, 0x6547);
+    i2c_value = isl_pmbus_vr_i2c_get16(i2cdev, PMBUS_READ_IOUT);
+    g_assert_cmphex(i2c_init_value, ==, i2c_value);
+
+    i2c_init_value = isl_pmbus_vr_i2c_get16(i2cdev, PMBUS_READ_TEMPERATURE_1);
+    isl_pmbus_vr_i2c_set16(i2cdev, PMBUS_READ_TEMPERATURE_1, 0x1597);
+    i2c_value = isl_pmbus_vr_i2c_get16(i2cdev, PMBUS_READ_TEMPERATURE_1);
+    g_assert_cmphex(i2c_init_value, ==, i2c_value);
+
+    i2c_init_value = isl_pmbus_vr_i2c_get16(i2cdev, PMBUS_READ_TEMPERATURE_2);
+    isl_pmbus_vr_i2c_set16(i2cdev, PMBUS_READ_TEMPERATURE_2, 0x1897);
+    i2c_value = isl_pmbus_vr_i2c_get16(i2cdev, PMBUS_READ_TEMPERATURE_2);
+    g_assert_cmphex(i2c_init_value, ==, i2c_value);
+
+    i2c_init_value = isl_pmbus_vr_i2c_get16(i2cdev, PMBUS_READ_TEMPERATURE_3);
+    isl_pmbus_vr_i2c_set16(i2cdev, PMBUS_READ_TEMPERATURE_3, 0x1007);
+    i2c_value = isl_pmbus_vr_i2c_get16(i2cdev, PMBUS_READ_TEMPERATURE_3);
+    g_assert_cmphex(i2c_init_value, ==, i2c_value);
+
+    i2c_init_value = isl_pmbus_vr_i2c_get16(i2cdev, PMBUS_READ_PIN);
+    isl_pmbus_vr_i2c_set16(i2cdev, PMBUS_READ_PIN, 0xDEAD);
+    i2c_value = isl_pmbus_vr_i2c_get16(i2cdev, PMBUS_READ_PIN);
+    g_assert_cmphex(i2c_init_value, ==, i2c_value);
+
+    i2c_init_value = isl_pmbus_vr_i2c_get16(i2cdev, PMBUS_READ_POUT);
+    isl_pmbus_vr_i2c_set16(i2cdev, PMBUS_READ_POUT, 0xD00D);
+    i2c_value = isl_pmbus_vr_i2c_get16(i2cdev, PMBUS_READ_POUT);
+    g_assert_cmphex(i2c_init_value, ==, i2c_value);
+}
+
+/* test voltage fault handling */
+static void test_voltage_faults(void *obj, void *data, QGuestAllocator *alloc)
+{
+    uint16_t i2c_value;
+    uint8_t i2c_byte;
+    QI2CDevice *i2cdev = (QI2CDevice *)obj;
+
+    isl_pmbus_vr_i2c_set16(i2cdev, PMBUS_VOUT_OV_WARN_LIMIT, 5000);
+    qmp_isl_pmbus_vr_set(TEST_ID, "vout[0]", 5100);
+
+    i2c_value = isl_pmbus_vr_i2c_get16(i2cdev, PMBUS_STATUS_WORD);
+    i2c_byte = i2c_get8(i2cdev, PMBUS_STATUS_VOUT);
+    g_assert_true((i2c_value & PB_STATUS_VOUT) != 0);
+    g_assert_true((i2c_byte & PB_STATUS_VOUT_OV_WARN) != 0);
+
+    qmp_isl_pmbus_vr_set(TEST_ID, "vout[0]", 4500);
+    i2c_set8(i2cdev, PMBUS_CLEAR_FAULTS, 0);
+    i2c_byte = i2c_get8(i2cdev, PMBUS_STATUS_VOUT);
+    g_assert_true((i2c_byte & PB_STATUS_VOUT_OV_WARN) == 0);
+
+    isl_pmbus_vr_i2c_set16(i2cdev, PMBUS_VOUT_UV_WARN_LIMIT, 4600);
+
+    i2c_value = isl_pmbus_vr_i2c_get16(i2cdev, PMBUS_STATUS_WORD);
+    i2c_byte = i2c_get8(i2cdev, PMBUS_STATUS_VOUT);
+    g_assert_true((i2c_value & PB_STATUS_VOUT) != 0);
+    g_assert_true((i2c_byte & PB_STATUS_VOUT_UV_WARN) != 0);
+
+}
+
+static void isl_pmbus_vr_register_nodes(void)
+{
+    QOSGraphEdgeOptions opts = {
+        .extra_device_opts = "id=" TEST_ID ",address=0x43"
+    };
+    add_qi2c_address(&opts, &(QI2CAddress) { TEST_ADDR });
+
+    qos_node_create_driver("isl69260", i2c_device_create);
+    qos_node_consumes("isl69260", "i2c-bus", &opts);
+
+    qos_add_test("test_defaults", "isl69260", test_defaults, NULL);
+    qos_add_test("test_tx_rx", "isl69260", test_tx_rx, NULL);
+    qos_add_test("test_rw_regs", "isl69260", test_rw_regs, NULL);
+    qos_add_test("test_pages_rw", "isl69260", test_pages_rw, NULL);
+    qos_add_test("test_ro_regs", "isl69260", test_ro_regs, NULL);
+    qos_add_test("test_ov_faults", "isl69260", test_voltage_faults, NULL);
+}
+libqos_init(isl_pmbus_vr_register_nodes);
diff --git a/tests/qtest/meson.build b/tests/qtest/meson.build
index f33d84d19b..98b5969a38 100644
--- a/tests/qtest/meson.build
+++ b/tests/qtest/meson.build
@@ -244,6 +244,7 @@ qos_test_ss.add(
   'es1370-test.c',
   'ipoctal232-test.c',
   'lsm303dlhc-mag-test.c',
+  'isl_pmbus_vr-test.c',
   'max34451-test.c',
   'megasas-test.c',
   'ne2000-test.c',
-- 
2.35.1.616.g0bdcbb4464-goog

[PATCH v3 8/9] hw/sensor: add Renesas raa229004 PMBus device

[Titus Rwantare]

The Renesas RAA229004 is a PMBus Multiphase Voltage Regulator

Signed-off-by: Titus Rwantare <titusr@google.com>
Reviewed-by: Hao Wu <wuhaotsh@google.com>
---
 hw/sensor/isl_pmbus_vr.c         | 18 ++++++++++++++++++
 include/hw/sensor/isl_pmbus_vr.h |  1 +
 tests/qtest/isl_pmbus_vr-test.c  |  8 ++++++++
 3 files changed, 27 insertions(+)

diff --git a/hw/sensor/isl_pmbus_vr.c b/hw/sensor/isl_pmbus_vr.c
index b3d24e40ab..e260faeac3 100644
--- a/hw/sensor/isl_pmbus_vr.c
+++ b/hw/sensor/isl_pmbus_vr.c
@@ -195,6 +195,15 @@ static void isl69260_class_init(ObjectClass *klass, void *data)
     isl_pmbus_vr_class_init(klass, data, 2);
 }
 
+static void raa229004_class_init(ObjectClass *klass, void *data)
+{
+    ResettableClass *rc = RESETTABLE_CLASS(klass);
+    DeviceClass *dc = DEVICE_CLASS(klass);
+    dc->desc = "Renesas 229004 Digital Multiphase Voltage Regulator";
+    rc->phases.exit = isl_pmbus_vr_exit_reset;
+    isl_pmbus_vr_class_init(klass, data, 2);
+}
+
 static const TypeInfo isl69260_info = {
     .name = TYPE_ISL69260,
     .parent = TYPE_PMBUS_DEVICE,
@@ -203,9 +212,18 @@ static const TypeInfo isl69260_info = {
     .class_init = isl69260_class_init,
 };
 
+static const TypeInfo raa229004_info = {
+    .name = TYPE_RAA229004,
+    .parent = TYPE_PMBUS_DEVICE,
+    .instance_size = sizeof(ISLState),
+    .instance_init = raa22xx_init,
+    .class_init = raa229004_class_init,
+};
+
 static void isl_pmbus_vr_register_types(void)
 {
     type_register_static(&isl69260_info);
+    type_register_static(&raa229004_info);
 }
 
 type_init(isl_pmbus_vr_register_types)
diff --git a/include/hw/sensor/isl_pmbus_vr.h b/include/hw/sensor/isl_pmbus_vr.h
index 4e12e95efb..233916f70a 100644
--- a/include/hw/sensor/isl_pmbus_vr.h
+++ b/include/hw/sensor/isl_pmbus_vr.h
@@ -13,6 +13,7 @@
 #include "qom/object.h"
 
 #define TYPE_ISL69260   "isl69260"
+#define TYPE_RAA229004  "raa229004"
 
 struct ISLState {
     PMBusDevice parent;
diff --git a/tests/qtest/isl_pmbus_vr-test.c b/tests/qtest/isl_pmbus_vr-test.c
index f77732ae96..a33dfb6135 100644
--- a/tests/qtest/isl_pmbus_vr-test.c
+++ b/tests/qtest/isl_pmbus_vr-test.c
@@ -384,11 +384,19 @@ static void isl_pmbus_vr_register_nodes(void)
     qos_node_create_driver("isl69260", i2c_device_create);
     qos_node_consumes("isl69260", "i2c-bus", &opts);
 
+    qos_node_create_driver("raa229004", i2c_device_create);
+    qos_node_consumes("raa229004", "i2c-bus", &opts);
+
     qos_add_test("test_defaults", "isl69260", test_defaults, NULL);
     qos_add_test("test_tx_rx", "isl69260", test_tx_rx, NULL);
     qos_add_test("test_rw_regs", "isl69260", test_rw_regs, NULL);
     qos_add_test("test_pages_rw", "isl69260", test_pages_rw, NULL);
     qos_add_test("test_ro_regs", "isl69260", test_ro_regs, NULL);
     qos_add_test("test_ov_faults", "isl69260", test_voltage_faults, NULL);
+
+    qos_add_test("test_tx_rx", "raa229004", test_tx_rx, NULL);
+    qos_add_test("test_rw_regs", "raa229004", test_rw_regs, NULL);
+    qos_add_test("test_pages_rw", "raa229004", test_pages_rw, NULL);
+    qos_add_test("test_ov_faults", "raa229004", test_voltage_faults, NULL);
 }
 libqos_init(isl_pmbus_vr_register_nodes);
-- 
2.35.1.616.g0bdcbb4464-goog

[PATCH v3 9/9] hw/sensor: add Renesas raa228000 device

[Titus Rwantare]

Signed-off-by: Titus Rwantare <titusr@google.com>
Reviewed-by: Hao Wu <wuhaotsh@google.com>
---
 hw/sensor/isl_pmbus_vr.c         | 50 ++++++++++++++++++++
 include/hw/sensor/isl_pmbus_vr.h |  1 +
 tests/qtest/isl_pmbus_vr-test.c  | 78 ++++++++++++++++++++++++++++++--
 3 files changed, 126 insertions(+), 3 deletions(-)

diff --git a/hw/sensor/isl_pmbus_vr.c b/hw/sensor/isl_pmbus_vr.c
index e260faeac3..df7c003ea6 100644
--- a/hw/sensor/isl_pmbus_vr.c
+++ b/hw/sensor/isl_pmbus_vr.c
@@ -89,6 +89,24 @@ static void isl_pmbus_vr_exit_reset(Object *obj)
     }
 }
 
+/* The raa228000 uses different direct mode coefficents from most isl devices */
+static void raa228000_exit_reset(Object *obj)
+{
+    isl_pmbus_vr_exit_reset(obj);
+
+    PMBusDevice *pmdev = PMBUS_DEVICE(obj);
+
+    pmdev->pages[0].read_vout = 0;
+    pmdev->pages[0].read_iout = 0;
+    pmdev->pages[0].read_pout = 0;
+    pmdev->pages[0].read_vin = 0;
+    pmdev->pages[0].read_iin = 0;
+    pmdev->pages[0].read_pin = 0;
+    pmdev->pages[0].read_temperature_1 = 0;
+    pmdev->pages[0].read_temperature_2 = 0;
+    pmdev->pages[0].read_temperature_3 = 0;
+}
+
 static void isl_pmbus_vr_add_props(Object *obj, uint64_t *flags, uint8_t pages)
 {
     PMBusDevice *pmdev = PMBUS_DEVICE(obj);
@@ -177,6 +195,20 @@ static void raa22xx_init(Object *obj)
     isl_pmbus_vr_add_props(obj, flags, 2);
 }
 
+static void raa228000_init(Object *obj)
+{
+    PMBusDevice *pmdev = PMBUS_DEVICE(obj);
+    uint64_t flags[1];
+
+    flags[0] = PB_HAS_VIN | PB_HAS_VOUT | PB_HAS_VOUT_MODE |
+               PB_HAS_VOUT_RATING | PB_HAS_VOUT_MARGIN | PB_HAS_IIN |
+               PB_HAS_IOUT | PB_HAS_PIN | PB_HAS_POUT | PB_HAS_TEMPERATURE |
+               PB_HAS_TEMP2 | PB_HAS_TEMP3 | PB_HAS_STATUS_MFR_SPECIFIC;
+
+    pmbus_page_config(pmdev, 0, flags[0]);
+    isl_pmbus_vr_add_props(obj, flags, 1);
+}
+
 static void isl_pmbus_vr_class_init(ObjectClass *klass, void *data,
                                     uint8_t pages)
 {
@@ -195,6 +227,15 @@ static void isl69260_class_init(ObjectClass *klass, void *data)
     isl_pmbus_vr_class_init(klass, data, 2);
 }
 
+static void raa228000_class_init(ObjectClass *klass, void *data)
+{
+    ResettableClass *rc = RESETTABLE_CLASS(klass);
+    DeviceClass *dc = DEVICE_CLASS(klass);
+    dc->desc = "Renesas 228000 Digital Multiphase Voltage Regulator";
+    rc->phases.exit = raa228000_exit_reset;
+    isl_pmbus_vr_class_init(klass, data, 1);
+}
+
 static void raa229004_class_init(ObjectClass *klass, void *data)
 {
     ResettableClass *rc = RESETTABLE_CLASS(klass);
@@ -220,9 +261,18 @@ static const TypeInfo raa229004_info = {
     .class_init = raa229004_class_init,
 };
 
+static const TypeInfo raa228000_info = {
+    .name = TYPE_RAA228000,
+    .parent = TYPE_PMBUS_DEVICE,
+    .instance_size = sizeof(ISLState),
+    .instance_init = raa228000_init,
+    .class_init = raa228000_class_init,
+};
+
 static void isl_pmbus_vr_register_types(void)
 {
     type_register_static(&isl69260_info);
+    type_register_static(&raa228000_info);
     type_register_static(&raa229004_info);
 }
 
diff --git a/include/hw/sensor/isl_pmbus_vr.h b/include/hw/sensor/isl_pmbus_vr.h
index 233916f70a..3e47ff7e48 100644
--- a/include/hw/sensor/isl_pmbus_vr.h
+++ b/include/hw/sensor/isl_pmbus_vr.h
@@ -13,6 +13,7 @@
 #include "qom/object.h"
 
 #define TYPE_ISL69260   "isl69260"
+#define TYPE_RAA228000  "raa228000"
 #define TYPE_RAA229004  "raa229004"
 
 struct ISLState {
diff --git a/tests/qtest/isl_pmbus_vr-test.c b/tests/qtest/isl_pmbus_vr-test.c
index a33dfb6135..5553ea410a 100644
--- a/tests/qtest/isl_pmbus_vr-test.c
+++ b/tests/qtest/isl_pmbus_vr-test.c
@@ -150,6 +150,70 @@ static void test_defaults(void *obj, void *data, QGuestAllocator *alloc)
     g_assert_cmphex(i2c_value, ==, ISL_REVISION_DEFAULT);
 }
 
+static void raa228000_test_defaults(void *obj, void *data,
+                                    QGuestAllocator *alloc)
+{
+    uint16_t value, i2c_value;
+    QI2CDevice *i2cdev = (QI2CDevice *)obj;
+
+    value = qmp_isl_pmbus_vr_get(TEST_ID, "vout[0]");
+    g_assert_cmpuint(value, ==, 0);
+
+    i2c_value = isl_pmbus_vr_i2c_get16(i2cdev, PMBUS_READ_IOUT);
+    g_assert_cmpuint(i2c_value, ==, 0);
+
+    value = qmp_isl_pmbus_vr_get(TEST_ID, "pout[0]");
+    g_assert_cmpuint(value, ==, 0);
+
+    i2c_value = i2c_get8(i2cdev, PMBUS_CAPABILITY);
+    g_assert_cmphex(i2c_value, ==, ISL_CAPABILITY_DEFAULT);
+
+    i2c_value = i2c_get8(i2cdev, PMBUS_OPERATION);
+    g_assert_cmphex(i2c_value, ==, ISL_OPERATION_DEFAULT);
+
+    i2c_value = i2c_get8(i2cdev, PMBUS_ON_OFF_CONFIG);
+    g_assert_cmphex(i2c_value, ==, ISL_ON_OFF_CONFIG_DEFAULT);
+
+    i2c_value = i2c_get8(i2cdev, PMBUS_VOUT_MODE);
+    g_assert_cmphex(i2c_value, ==, ISL_VOUT_MODE_DEFAULT);
+
+    i2c_value = isl_pmbus_vr_i2c_get16(i2cdev, PMBUS_VOUT_COMMAND);
+    g_assert_cmphex(i2c_value, ==, ISL_VOUT_COMMAND_DEFAULT);
+
+    i2c_value = isl_pmbus_vr_i2c_get16(i2cdev, PMBUS_VOUT_MAX);
+    g_assert_cmphex(i2c_value, ==, ISL_VOUT_MAX_DEFAULT);
+
+    i2c_value = isl_pmbus_vr_i2c_get16(i2cdev, PMBUS_VOUT_MARGIN_HIGH);
+    g_assert_cmphex(i2c_value, ==, ISL_VOUT_MARGIN_HIGH_DEFAULT);
+
+    i2c_value = isl_pmbus_vr_i2c_get16(i2cdev, PMBUS_VOUT_MARGIN_LOW);
+    g_assert_cmphex(i2c_value, ==, ISL_VOUT_MARGIN_LOW_DEFAULT);
+
+    i2c_value = isl_pmbus_vr_i2c_get16(i2cdev, PMBUS_VOUT_TRANSITION_RATE);
+    g_assert_cmphex(i2c_value, ==, ISL_VOUT_TRANSITION_RATE_DEFAULT);
+
+    i2c_value = isl_pmbus_vr_i2c_get16(i2cdev, PMBUS_VOUT_OV_FAULT_LIMIT);
+    g_assert_cmphex(i2c_value, ==, ISL_VOUT_OV_FAULT_LIMIT_DEFAULT);
+
+    i2c_value = isl_pmbus_vr_i2c_get16(i2cdev, PMBUS_OT_FAULT_LIMIT);
+    g_assert_cmphex(i2c_value, ==, ISL_OT_FAULT_LIMIT_DEFAULT);
+
+    i2c_value = isl_pmbus_vr_i2c_get16(i2cdev, PMBUS_OT_WARN_LIMIT);
+    g_assert_cmphex(i2c_value, ==, ISL_OT_WARN_LIMIT_DEFAULT);
+
+    i2c_value = isl_pmbus_vr_i2c_get16(i2cdev, PMBUS_VIN_OV_WARN_LIMIT);
+    g_assert_cmphex(i2c_value, ==, ISL_VIN_OV_WARN_LIMIT_DEFAULT);
+
+    i2c_value = isl_pmbus_vr_i2c_get16(i2cdev, PMBUS_VIN_UV_WARN_LIMIT);
+    g_assert_cmphex(i2c_value, ==, ISL_VIN_UV_WARN_LIMIT_DEFAULT);
+
+    i2c_value = isl_pmbus_vr_i2c_get16(i2cdev, PMBUS_IIN_OC_FAULT_LIMIT);
+    g_assert_cmphex(i2c_value, ==, ISL_IIN_OC_FAULT_LIMIT_DEFAULT);
+
+    i2c_value = i2c_get8(i2cdev, PMBUS_REVISION);
+    g_assert_cmphex(i2c_value, ==, ISL_REVISION_DEFAULT);
+}
+
 /* test qmp access */
 static void test_tx_rx(void *obj, void *data, QGuestAllocator *alloc)
 {
@@ -384,9 +448,6 @@ static void isl_pmbus_vr_register_nodes(void)
     qos_node_create_driver("isl69260", i2c_device_create);
     qos_node_consumes("isl69260", "i2c-bus", &opts);
 
-    qos_node_create_driver("raa229004", i2c_device_create);
-    qos_node_consumes("raa229004", "i2c-bus", &opts);
-
     qos_add_test("test_defaults", "isl69260", test_defaults, NULL);
     qos_add_test("test_tx_rx", "isl69260", test_tx_rx, NULL);
     qos_add_test("test_rw_regs", "isl69260", test_rw_regs, NULL);
@@ -394,9 +455,20 @@ static void isl_pmbus_vr_register_nodes(void)
     qos_add_test("test_ro_regs", "isl69260", test_ro_regs, NULL);
     qos_add_test("test_ov_faults", "isl69260", test_voltage_faults, NULL);
 
+    qos_node_create_driver("raa229004", i2c_device_create);
+    qos_node_consumes("raa229004", "i2c-bus", &opts);
+
     qos_add_test("test_tx_rx", "raa229004", test_tx_rx, NULL);
     qos_add_test("test_rw_regs", "raa229004", test_rw_regs, NULL);
     qos_add_test("test_pages_rw", "raa229004", test_pages_rw, NULL);
     qos_add_test("test_ov_faults", "raa229004", test_voltage_faults, NULL);
+
+    qos_node_create_driver("raa228000", i2c_device_create);
+    qos_node_consumes("raa228000", "i2c-bus", &opts);
+
+    qos_add_test("test_defaults", "raa228000", raa228000_test_defaults, NULL);
+    qos_add_test("test_tx_rx", "raa228000", test_tx_rx, NULL);
+    qos_add_test("test_rw_regs", "raa228000", test_rw_regs, NULL);
+    qos_add_test("test_ov_faults", "raa228000", test_voltage_faults, NULL);
 }
 libqos_init(isl_pmbus_vr_register_nodes);
-- 
2.35.1.616.g0bdcbb4464-goog

Re: [PATCH v3 0/9] This patch series contains updates to PMBus in QEMU along with some PMBus device models for Renesas regulators. I have also added myself to MAINTAINERS as this code is in use daily, where I am responsible for it.

[Corey Minyard]

On Tue, Mar 01, 2022 at 05:50:44PM -0800, Titus Rwantare wrote:
> v2:
>   - split PMBus commit with updates into individual fixes
>   - renamed isl_pmbus[.ch] adding _vr for voltage regulators
> 
> v3:
>   - split uint refactor commit and removed commit renaming files
>   - rename rolled into preceding commits
>   - update commit description for uint refactoring change

This all looks good to me:

Acked-by: Corey Minyard <cminyard@mvista.com>

Do you have a plan for getting this in to qemu?  Like through the ARM
tree?  I could take it into an I2C tree, but there's really not much
activity or work there.

-corey

> 
> Shengtan Mao (1):
>   hw/i2c: Added linear mode translation for pmbus devices
> 
> Titus Rwantare (8):
>   hw/i2c: pmbus: add registers
>   hw/i2c: pmbus: guard against out of range accesses
>   hw/i2c: pmbus: add PEC unsupported warning
>   hw/i2c: pmbus: refactor uint handling
>   hw/i2c: pmbus: update MAINTAINERS
>   hw/sensor: add Intersil ISL69260 device model
>   hw/sensor: add Renesas raa229004 PMBus device
>   hw/sensor: add Renesas raa228000 device
> 
>  MAINTAINERS                      |  13 +
>  hw/arm/Kconfig                   |   1 +
>  hw/i2c/pmbus_device.c            | 106 ++++++-
>  hw/sensor/Kconfig                |   5 +
>  hw/sensor/isl_pmbus_vr.c         | 279 ++++++++++++++++++
>  hw/sensor/meson.build            |   1 +
>  include/hw/i2c/pmbus_device.h    |  23 +-
>  include/hw/sensor/isl_pmbus_vr.h |  52 ++++
>  tests/qtest/isl_pmbus_vr-test.c  | 474 +++++++++++++++++++++++++++++++
>  tests/qtest/meson.build          |   1 +
>  10 files changed, 944 insertions(+), 11 deletions(-)
>  create mode 100644 hw/sensor/isl_pmbus_vr.c
>  create mode 100644 include/hw/sensor/isl_pmbus_vr.h
>  create mode 100644 tests/qtest/isl_pmbus_vr-test.c
> 
> -- 
> 2.35.1.616.g0bdcbb4464-goog
> 

Re: [PATCH v3 0/9] This patch series contains updates to PMBus in QEMU along with some PMBus device models for Renesas regulators. I have also added myself to MAINTAINERS as this code is in use daily, where I am responsible for it.

[Titus Rwantare]

On Fri, 4 Mar 2022 at 13:43, Corey Minyard <minyard@acm.org> wrote:
>
> On Tue, Mar 01, 2022 at 05:50:44PM -0800, Titus Rwantare wrote:
> > v2:
> >   - split PMBus commit with updates into individual fixes
> >   - renamed isl_pmbus[.ch] adding _vr for voltage regulators
> >
> > v3:
> >   - split uint refactor commit and removed commit renaming files
> >   - rename rolled into preceding commits
> >   - update commit description for uint refactoring change
>
> This all looks good to me:
>
> Acked-by: Corey Minyard <cminyard@mvista.com>
>
> Do you have a plan for getting this in to qemu?  Like through the ARM
> tree?  I could take it into an I2C tree, but there's really not much
> activity or work there.
>
> -corey

In general PMBus is more specific to i2c than ARM, but I'm not sure of
the QEMU implications.

Titus

Re: [PATCH v3 5/9] hw/i2c: pmbus: update MAINTAINERS

[Philippe Mathieu-Daudé]

On 2/3/22 02:50, Titus Rwantare wrote:
> add self to MAINTAINERS for the PMBus subsystem and related sensors,
> and set PMBus as maintained.
> 
> Signed-off-by: Titus Rwantare <titusr@google.com>
> ---
>   MAINTAINERS | 10 ++++++++++
>   1 file changed, 10 insertions(+)

Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>

Re: [PATCH v3 6/9] hw/i2c: Added linear mode translation for pmbus devices

[Philippe Mathieu-Daudé]

On 2/3/22 02:50, Titus Rwantare wrote:
> From: Shengtan Mao <stmao@google.com>
> 
> Signed-off-by: Shengtan Mao <stmao@google.com>
> Reviewed-by: Titus Rwantare <titusr@google.com>
> ---
>   hw/i2c/pmbus_device.c         | 18 ++++++++++++++++++
>   include/hw/i2c/pmbus_device.h | 20 +++++++++++++++++++-
>   2 files changed, 37 insertions(+), 1 deletion(-)

Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>

Re: [PATCH v3 8/9] hw/sensor: add Renesas raa229004 PMBus device

[Philippe Mathieu-Daudé]

On 2/3/22 02:50, Titus Rwantare wrote:
> The Renesas RAA229004 is a PMBus Multiphase Voltage Regulator
> 
> Signed-off-by: Titus Rwantare <titusr@google.com>
> Reviewed-by: Hao Wu <wuhaotsh@google.com>
> ---
>   hw/sensor/isl_pmbus_vr.c         | 18 ++++++++++++++++++
>   include/hw/sensor/isl_pmbus_vr.h |  1 +
>   tests/qtest/isl_pmbus_vr-test.c  |  8 ++++++++
>   3 files changed, 27 insertions(+)

Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>

Re: [PATCH v3 9/9] hw/sensor: add Renesas raa228000 device

[Philippe Mathieu-Daudé]

On 2/3/22 02:50, Titus Rwantare wrote:
> Signed-off-by: Titus Rwantare <titusr@google.com>
> Reviewed-by: Hao Wu <wuhaotsh@google.com>
> ---
>   hw/sensor/isl_pmbus_vr.c         | 50 ++++++++++++++++++++
>   include/hw/sensor/isl_pmbus_vr.h |  1 +
>   tests/qtest/isl_pmbus_vr-test.c  | 78 ++++++++++++++++++++++++++++++--
>   3 files changed, 126 insertions(+), 3 deletions(-)
> 
> diff --git a/hw/sensor/isl_pmbus_vr.c b/hw/sensor/isl_pmbus_vr.c
> index e260faeac3..df7c003ea6 100644
> --- a/hw/sensor/isl_pmbus_vr.c
> +++ b/hw/sensor/isl_pmbus_vr.c
> @@ -89,6 +89,24 @@ static void isl_pmbus_vr_exit_reset(Object *obj)
>       }
>   }
>   
> +/* The raa228000 uses different direct mode coefficents from most isl devices */
> +static void raa228000_exit_reset(Object *obj)
> +{
> +    isl_pmbus_vr_exit_reset(obj);
> +
> +    PMBusDevice *pmdev = PMBUS_DEVICE(obj);

Per QEMU CodingStyle, variables are declared first.

> +    pmdev->pages[0].read_vout = 0;
> +    pmdev->pages[0].read_iout = 0;
> +    pmdev->pages[0].read_pout = 0;
> +    pmdev->pages[0].read_vin = 0;
> +    pmdev->pages[0].read_iin = 0;
> +    pmdev->pages[0].read_pin = 0;
> +    pmdev->pages[0].read_temperature_1 = 0;
> +    pmdev->pages[0].read_temperature_2 = 0;
> +    pmdev->pages[0].read_temperature_3 = 0;
> +}

>   /* test qmp access */
>   static void test_tx_rx(void *obj, void *data, QGuestAllocator *alloc)
>   {
> @@ -384,9 +448,6 @@ static void isl_pmbus_vr_register_nodes(void)
>       qos_node_create_driver("isl69260", i2c_device_create);
>       qos_node_consumes("isl69260", "i2c-bus", &opts);
>   
> -    qos_node_create_driver("raa229004", i2c_device_create);
> -    qos_node_consumes("raa229004", "i2c-bus", &opts);
> -
>       qos_add_test("test_defaults", "isl69260", test_defaults, NULL);
>       qos_add_test("test_tx_rx", "isl69260", test_tx_rx, NULL);
>       qos_add_test("test_rw_regs", "isl69260", test_rw_regs, NULL);
> @@ -394,9 +455,20 @@ static void isl_pmbus_vr_register_nodes(void)
>       qos_add_test("test_ro_regs", "isl69260", test_ro_regs, NULL);
>       qos_add_test("test_ov_faults", "isl69260", test_voltage_faults, NULL);
>   
> +    qos_node_create_driver("raa229004", i2c_device_create);
> +    qos_node_consumes("raa229004", "i2c-bus", &opts);
> +

Squash in previous commit?

>       qos_add_test("test_tx_rx", "raa229004", test_tx_rx, NULL);
>       qos_add_test("test_rw_regs", "raa229004", test_rw_regs, NULL);
>       qos_add_test("test_pages_rw", "raa229004", test_pages_rw, NULL);
>       qos_add_test("test_ov_faults", "raa229004", test_voltage_faults, NULL);

Otherwise,
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>

Re: [PATCH v3 4/9] hw/i2c: pmbus: refactor uint handling

[Philippe Mathieu-Daudé]

On 2/3/22 02:50, Titus Rwantare wrote:
> This change cleans up the inputs to pmbus_receive uint, the length of
> received data is contained in PMBusDevice state and doesn't need to be
> passed around.
> 
> Signed-off-by: Titus Rwantare <titusr@google.com>
> ---
>   hw/i2c/pmbus_device.c | 18 +++++++++---------
>   1 file changed, 9 insertions(+), 9 deletions(-)

Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>

Re: [PATCH v3 3/9] hw/i2c: pmbus: add PEC unsupported warning

[Philippe Mathieu-Daudé]

On 2/3/22 02:50, Titus Rwantare wrote:
> Signed-off-by: Titus Rwantare <titusr@google.com>
> ---
>   hw/i2c/pmbus_device.c | 5 +++++
>   1 file changed, 5 insertions(+)
> 
> diff --git a/hw/i2c/pmbus_device.c b/hw/i2c/pmbus_device.c
> index 93c746bab3..6eeb0731d7 100644
> --- a/hw/i2c/pmbus_device.c
> +++ b/hw/i2c/pmbus_device.c
> @@ -307,6 +307,11 @@ static uint8_t pmbus_receive_byte(SMBusDevice *smd)
>   
>       case PMBUS_CAPABILITY:
>           pmbus_send8(pmdev, pmdev->capability);
> +        if (pmdev->capability & BIT(7)) {
> +            qemu_log_mask(LOG_GUEST_ERROR,

That would be LOG_UNIMP?

> +                          "%s: PEC is enabled but not yet supported.\n",
> +                          __func__);
> +        }
>           break;
>   
>       case PMBUS_VOUT_MODE:                 /* R/W byte */

Re: [PATCH v3 2/9] hw/i2c: pmbus: guard against out of range accesses

[Philippe Mathieu-Daudé]

On 2/3/22 02:50, Titus Rwantare wrote:
> Signed-off-by: Titus Rwantare <titusr@google.com>
> ---
>   hw/i2c/pmbus_device.c | 41 ++++++++++++++++++++++++++++++++++++++++-
>   1 file changed, 40 insertions(+), 1 deletion(-)

>   static uint8_t pmbus_receive_byte(SMBusDevice *smd)
>   {
>       PMBusDevice *pmdev = PMBUS_DEVICE(smd);
>       PMBusDeviceClass *pmdc = PMBUS_DEVICE_GET_CLASS(pmdev);
>       uint8_t ret = 0xFF;
> -    uint8_t index = pmdev->page;
> +    uint8_t index;
>   
>       if (pmdev->out_buf_len != 0) {
>           ret = pmbus_out_buf_pop(pmdev);
>           return ret;
>       }
>   
> +    /*
> +     * Reading from all pages will return the value from page 0,
> +     * this is unspecified behaviour in general.
> +     */
> +    if (pmdev->page == PB_ALL_PAGES) {
> +        index = 0;
> +        qemu_log_mask(LOG_GUEST_ERROR,
> +                      "%s: tried to read from all pages\n",
> +                      __func__);
> +        pmbus_cml_error(pmdev);
> +    } else if (pmdev->page > pmdev->num_pages - 1) {
> +        qemu_log_mask(LOG_GUEST_ERROR,
> +                      "%s: page %d is out of range\n",
> +                      __func__, pmdev->page);
> +        pmbus_cml_error(pmdev);
> +        return -1;

This file returns a mix of 0xFF/-1 for error. It would be nice
to pick one. Adding a definition (PMBUS_ERR_BYTE?) could help.

Preferably with error unified:
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>

Re: [PATCH v3 7/9] hw/sensor: add Intersil ISL69260 device model

[Philippe Mathieu-Daudé]

On 2/3/22 02:50, Titus Rwantare wrote:
> Signed-off-by: Titus Rwantare <titusr@google.com>
> Reviewed-by: Hao Wu <wuhaotsh@google.com>
> ---
>   MAINTAINERS                      |   3 +
>   hw/arm/Kconfig                   |   1 +
>   hw/sensor/Kconfig                |   5 +
>   hw/sensor/isl_pmbus_vr.c         | 211 +++++++++++++++++
>   hw/sensor/meson.build            |   1 +
>   include/hw/sensor/isl_pmbus_vr.h |  50 ++++
>   tests/qtest/isl_pmbus_vr-test.c  | 394 +++++++++++++++++++++++++++++++
>   tests/qtest/meson.build          |   1 +
>   8 files changed, 666 insertions(+)
>   create mode 100644 hw/sensor/isl_pmbus_vr.c
>   create mode 100644 include/hw/sensor/isl_pmbus_vr.h
>   create mode 100644 tests/qtest/isl_pmbus_vr-test.c

> diff --git a/hw/sensor/Kconfig b/hw/sensor/Kconfig
> index 215944decc..a834d2f814 100644
> --- a/hw/sensor/Kconfig
> +++ b/hw/sensor/Kconfig
> @@ -30,3 +30,8 @@ config LSM303DLHC_MAG
>       bool
>       depends on I2C
>       default y if I2C_DEVICES
> +
> +config ISL_PMBUS_VR
> +    bool
> +    depends on I2C

There is a PMBUS kconfig selector (which selects SMBUS -> I2C).

> +
> diff --git a/hw/sensor/isl_pmbus_vr.c b/hw/sensor/isl_pmbus_vr.c
> new file mode 100644
> index 0000000000..b3d24e40ab
> --- /dev/null
> +++ b/hw/sensor/isl_pmbus_vr.c
> @@ -0,0 +1,211 @@
> +/*
> + * PMBus device for Renesas Digital Multiphase Voltage Regulators
> + *
> + * Copyright 2021 Google LLC
> + *
> + * SPDX-License-Identifier: GPL-2.0-or-later
> + */
> +
> +#include "qemu/osdep.h"
> +#include "hw/sensor/isl_pmbus_vr.h"
> +#include "hw/qdev-properties.h"
> +#include "qapi/visitor.h"
> +#include "qemu/log.h"
> +#include "qemu/module.h"
> +
> +static uint8_t isl_pmbus_vr_read_byte(PMBusDevice *pmdev)
> +{
> +    qemu_log_mask(LOG_GUEST_ERROR,
> +                  "%s: reading from unsupported register: 0x%02x\n",
> +                  __func__, pmdev->code);
> +    return 0xFF;

Eventually PMBUS_ERROR_BYTE.

> +}
> +
> +static int isl_pmbus_vr_write_data(PMBusDevice *pmdev, const uint8_t *buf,
> +                              uint8_t len)

Mis-aligned.

> +{
> +    qemu_log_mask(LOG_GUEST_ERROR,
> +                  "%s: write to unsupported register: 0x%02x\n",
> +                  __func__, pmdev->code);
> +    return 0xFF;
> +}

> +static void raa22xx_init(Object *obj)
> +{
> +    PMBusDevice *pmdev = PMBUS_DEVICE(obj);
> +    uint64_t flags[2];
> +
> +    flags[0] = PB_HAS_VIN | PB_HAS_VOUT | PB_HAS_VOUT_MODE |
> +               PB_HAS_VOUT_RATING | PB_HAS_VOUT_MARGIN | PB_HAS_IIN |
> +               PB_HAS_IOUT | PB_HAS_PIN | PB_HAS_POUT | PB_HAS_TEMPERATURE |
> +               PB_HAS_TEMP2 | PB_HAS_TEMP3 | PB_HAS_STATUS_MFR_SPECIFIC;
> +    flags[1] = PB_HAS_IIN | PB_HAS_PIN | PB_HAS_TEMPERATURE | PB_HAS_TEMP3 |
> +               PB_HAS_VOUT | PB_HAS_VOUT_MODE | PB_HAS_VOUT_MARGIN |
> +               PB_HAS_VOUT_RATING | PB_HAS_IOUT | PB_HAS_POUT |
> +               PB_HAS_STATUS_MFR_SPECIFIC;
> +
> +    pmbus_page_config(pmdev, 0, flags[0]);
> +    pmbus_page_config(pmdev, 1, flags[1]);
> +    isl_pmbus_vr_add_props(obj, flags, 2);

Eventually 2 -> ARRAY_SIZE(flags).

> +++ b/include/hw/sensor/isl_pmbus_vr.h
> @@ -0,0 +1,50 @@
> +/*
> + * PMBus device for Renesas Digital Multiphase Voltage Regulators
> + *
> + * Copyright 2022 Google LLC
> + *
> + * SPDX-License-Identifier: GPL-2.0-or-later
> + */
> +
> +#ifndef HW_MISC_ISL_PMBUS_VR_H
> +#define HW_MISC_ISL_PMBUS_VR_H
> +
> +#include "hw/i2c/pmbus_device.h"
> +#include "qom/object.h"
> +
> +#define TYPE_ISL69260   "isl69260"
> +
> +struct ISLState {
> +    PMBusDevice parent;
> +};
> +
> +OBJECT_DECLARE_SIMPLE_TYPE(ISLState, ISL69260)
> +
> +#define ISL_CAPABILITY_DEFAULT                 0x40
> +#define ISL_OPERATION_DEFAULT                  0x80
> +#define ISL_ON_OFF_CONFIG_DEFAULT              0x16
> +#define ISL_VOUT_MODE_DEFAULT                  0x40
> +#define ISL_VOUT_COMMAND_DEFAULT               0x0384
> +#define ISL_VOUT_MAX_DEFAULT                   0x08FC
> +#define ISL_VOUT_MARGIN_HIGH_DEFAULT           0x0640
> +#define ISL_VOUT_MARGIN_LOW_DEFAULT            0xFA
> +#define ISL_VOUT_TRANSITION_RATE_DEFAULT       0x64
> +#define ISL_VOUT_OV_FAULT_LIMIT_DEFAULT        0x076C
> +#define ISL_OT_FAULT_LIMIT_DEFAULT             0x7D
> +#define ISL_OT_WARN_LIMIT_DEFAULT              0x07D0
> +#define ISL_VIN_OV_WARN_LIMIT_DEFAULT          0x36B0
> +#define ISL_VIN_UV_WARN_LIMIT_DEFAULT          0x1F40
> +#define ISL_IIN_OC_FAULT_LIMIT_DEFAULT         0x32
> +#define ISL_TON_DELAY_DEFAULT                  0x14
> +#define ISL_TON_RISE_DEFAULT                   0x01F4
> +#define ISL_TOFF_FALL_DEFAULT                  0x01F4
> +#define ISL_REVISION_DEFAULT                   0x33
> +#define ISL_READ_VOUT_DEFAULT                  1000
> +#define ISL_READ_IOUT_DEFAULT                  40
> +#define ISL_READ_POUT_DEFAULT                  4
> +#define ISL_READ_TEMP_DEFAULT                  25
> +#define ISL_READ_VIN_DEFAULT                   1100
> +#define ISL_READ_IIN_DEFAULT                   40
> +#define ISL_READ_PIN_DEFAULT                   4

Hmmm we need to expose the DEFAULT definitions for the tests. OK.

Changing Kconfig:
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>

Re: [PATCH v3 1/9] hw/i2c: pmbus: add registers

[Philippe Mathieu-Daudé]

On 2/3/22 02:50, Titus Rwantare wrote:
>     - add the VOUT_MIN and STATUS_MFR registers
> 
> Signed-off-by: Titus Rwantare <titusr@google.com>
> ---
>   hw/i2c/pmbus_device.c         | 24 ++++++++++++++++++++++++
>   include/hw/i2c/pmbus_device.h |  3 +++
>   2 files changed, 27 insertions(+)

Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>

Re: [PATCH v3 0/9] This patch series contains updates to PMBus in QEMU along with some PMBus device models for Renesas regulators. I have also added myself to MAINTAINERS as this code is in use daily, where I am responsible for it.

[Philippe Mathieu-Daudé]

On 5/3/22 00:42, Titus Rwantare wrote:
> On Fri, 4 Mar 2022 at 13:43, Corey Minyard <minyard@acm.org> wrote:
>>
>> On Tue, Mar 01, 2022 at 05:50:44PM -0800, Titus Rwantare wrote:
>>> v2:
>>>    - split PMBus commit with updates into individual fixes
>>>    - renamed isl_pmbus[.ch] adding _vr for voltage regulators
>>>
>>> v3:
>>>    - split uint refactor commit and removed commit renaming files
>>>    - rename rolled into preceding commits
>>>    - update commit description for uint refactoring change
>>
>> This all looks good to me:
>>
>> Acked-by: Corey Minyard <cminyard@mvista.com>
>>
>> Do you have a plan for getting this in to qemu?  Like through the ARM
>> tree?  I could take it into an I2C tree, but there's really not much
>> activity or work there.
>>
>> -corey
> 
> In general PMBus is more specific to i2c than ARM, but I'm not sure of
> the QEMU implications.

Titus, could you address my comments?

Corey, if you are busy, I can take care of this series.

Regards,

Phil.

Re: [PATCH v3 2/9] hw/i2c: pmbus: guard against out of range accesses

[Titus Rwantare]

Ack. All errors for PMBus should
ideally be reflected in status and status_cml registers instead of
carrying meaning in return values. I'll have to separately go through
the existing code to make it consistent.


On Fri, 4 Mar 2022 at 16:08, Philippe Mathieu-Daudé
<philippe.mathieu.daude@gmail.com> wrote:
>
> On 2/3/22 02:50, Titus Rwantare wrote:
> > Signed-off-by: Titus Rwantare <titusr@google.com>
> > ---
> >   hw/i2c/pmbus_device.c | 41 ++++++++++++++++++++++++++++++++++++++++-
> >   1 file changed, 40 insertions(+), 1 deletion(-)
>
> >   static uint8_t pmbus_receive_byte(SMBusDevice *smd)
> >   {
> >       PMBusDevice *pmdev = PMBUS_DEVICE(smd);
> >       PMBusDeviceClass *pmdc = PMBUS_DEVICE_GET_CLASS(pmdev);
> >       uint8_t ret = 0xFF;
> > -    uint8_t index = pmdev->page;
> > +    uint8_t index;
> >
> >       if (pmdev->out_buf_len != 0) {
> >           ret = pmbus_out_buf_pop(pmdev);
> >           return ret;
> >       }
> >
> > +    /*
> > +     * Reading from all pages will return the value from page 0,
> > +     * this is unspecified behaviour in general.
> > +     */
> > +    if (pmdev->page == PB_ALL_PAGES) {
> > +        index = 0;
> > +        qemu_log_mask(LOG_GUEST_ERROR,
> > +                      "%s: tried to read from all pages\n",
> > +                      __func__);
> > +        pmbus_cml_error(pmdev);
> > +    } else if (pmdev->page > pmdev->num_pages - 1) {
> > +        qemu_log_mask(LOG_GUEST_ERROR,
> > +                      "%s: page %d is out of range\n",
> > +                      __func__, pmdev->page);
> > +        pmbus_cml_error(pmdev);
> > +        return -1;
>
> This file returns a mix of 0xFF/-1 for error. It would be nice
> to pick one. Adding a definition (PMBUS_ERR_BYTE?) could help.
>
> Preferably with error unified:
> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>

Re: [PATCH v3 3/9] hw/i2c: pmbus: add PEC unsupported warning

[Titus Rwantare]

Yes, fixed.

On Fri, 4 Mar 2022 at 16:02, Philippe Mathieu-Daudé
<philippe.mathieu.daude@gmail.com> wrote:
>
> On 2/3/22 02:50, Titus Rwantare wrote:
> > Signed-off-by: Titus Rwantare <titusr@google.com>
> > ---
> >   hw/i2c/pmbus_device.c | 5 +++++
> >   1 file changed, 5 insertions(+)
> >
> > diff --git a/hw/i2c/pmbus_device.c b/hw/i2c/pmbus_device.c
> > index 93c746bab3..6eeb0731d7 100644
> > --- a/hw/i2c/pmbus_device.c
> > +++ b/hw/i2c/pmbus_device.c
> > @@ -307,6 +307,11 @@ static uint8_t pmbus_receive_byte(SMBusDevice *smd)
> >
> >       case PMBUS_CAPABILITY:
> >           pmbus_send8(pmdev, pmdev->capability);
> > +        if (pmdev->capability & BIT(7)) {
> > +            qemu_log_mask(LOG_GUEST_ERROR,
>
> That would be LOG_UNIMP?
>
> > +                          "%s: PEC is enabled but not yet supported.\n",
> > +                          __func__);
> > +        }
> >           break;
> >
> >       case PMBUS_VOUT_MODE:                 /* R/W byte */
>

Re: [PATCH v3 0/9] This patch series contains updates to PMBus in QEMU along with some PMBus device models for Renesas regulators. I have also added myself to MAINTAINERS as this code is in use daily, where I am responsible for it.

[Corey Minyard]

On Mon, Mar 07, 2022 at 01:00:02AM +0100, Philippe Mathieu-Daudé wrote:
> On 5/3/22 00:42, Titus Rwantare wrote:
> > On Fri, 4 Mar 2022 at 13:43, Corey Minyard <minyard@acm.org> wrote:
> > > 
> > > On Tue, Mar 01, 2022 at 05:50:44PM -0800, Titus Rwantare wrote:
> > > > v2:
> > > >    - split PMBus commit with updates into individual fixes
> > > >    - renamed isl_pmbus[.ch] adding _vr for voltage regulators
> > > > 
> > > > v3:
> > > >    - split uint refactor commit and removed commit renaming files
> > > >    - rename rolled into preceding commits
> > > >    - update commit description for uint refactoring change
> > > 
> > > This all looks good to me:
> > > 
> > > Acked-by: Corey Minyard <cminyard@mvista.com>
> > > 
> > > Do you have a plan for getting this in to qemu?  Like through the ARM
> > > tree?  I could take it into an I2C tree, but there's really not much
> > > activity or work there.
> > > 
> > > -corey
> > 
> > In general PMBus is more specific to i2c than ARM, but I'm not sure of
> > the QEMU implications.
> 
> Titus, could you address my comments?
> 
> Corey, if you are busy, I can take care of this series.

It's not a "too busy" sort of thing, the i2c tree doesn't get much
traffic.  I can take it, but it's not much different than just pulling
it directly.

So it's probably best if you take it.

Thanks,

-corey

> 
> Regards,
> 
> Phil.
> 

Re: [PATCH v3 0/9] This patch series contains updates to PMBus in QEMU along with some PMBus device models for Renesas regulators. I have also added myself to MAINTAINERS as this code is in use daily, where I am responsible for it.

[Philippe Mathieu-Daudé]

On 8/3/22 14:53, Corey Minyard wrote:
> On Mon, Mar 07, 2022 at 01:00:02AM +0100, Philippe Mathieu-Daudé wrote:
>> On 5/3/22 00:42, Titus Rwantare wrote:
>>> On Fri, 4 Mar 2022 at 13:43, Corey Minyard <minyard@acm.org> wrote:
>>>>
>>>> On Tue, Mar 01, 2022 at 05:50:44PM -0800, Titus Rwantare wrote:
>>>>> v2:
>>>>>     - split PMBus commit with updates into individual fixes
>>>>>     - renamed isl_pmbus[.ch] adding _vr for voltage regulators
>>>>>
>>>>> v3:
>>>>>     - split uint refactor commit and removed commit renaming files
>>>>>     - rename rolled into preceding commits
>>>>>     - update commit description for uint refactoring change
>>>>
>>>> This all looks good to me:
>>>>
>>>> Acked-by: Corey Minyard <cminyard@mvista.com>
>>>>
>>>> Do you have a plan for getting this in to qemu?  Like through the ARM
>>>> tree?  I could take it into an I2C tree, but there's really not much
>>>> activity or work there.
>>>>
>>>> -corey
>>>
>>> In general PMBus is more specific to i2c than ARM, but I'm not sure of
>>> the QEMU implications.
>>
>> Titus, could you address my comments?
>>
>> Corey, if you are busy, I can take care of this series.
> 
> It's not a "too busy" sort of thing, the i2c tree doesn't get much
> traffic.  I can take it, but it's not much different than just pulling
> it directly.
> 
> So it's probably best if you take it.

OK. I'll send a pullreq shortly.

Regards,

Phil.