diff options
| author | Karol Herbst <nouveau@karolherbst.de> | 2016-02-18 18:53:44 +0300 |
|---|---|---|
| committer | Ben Skeggs <bskeggs@redhat.com> | 2016-03-14 03:13:25 +0300 |
| commit | b71c0892631af3dd2aea708529d282a65c683be5 (patch) | |
| tree | 8b316ef575fbef8efc237933e93cfee3480ac891 /drivers/gpu/drm/nouveau/include/nvkm/subdev/i2c.h | |
| parent | 39b7e6e547ffca0b42a29df5a213f5bf3a19af0b (diff) | |
| download | linux-b71c0892631af3dd2aea708529d282a65c683be5.tar.xz | |
drm/nouveau/iccsense: implement for ina209, ina219 and ina3221
based on Martins initial work
v3: fix ina2x9 calculations
v4: don't kmalloc(0), fix the lsb/pga stuff
v5: add a field to tell if the power reading may be invalid
add nkvm_iccsense_read_all function
check for the device on the i2c bus
Signed-off-by: Karol Herbst <nouveau@karolherbst.de>
Reviewed-by: Martin Peres <martin.peres@free.fr>
Diffstat (limited to 'drivers/gpu/drm/nouveau/include/nvkm/subdev/i2c.h')
| -rw-r--r-- | drivers/gpu/drm/nouveau/include/nvkm/subdev/i2c.h | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/include/nvkm/subdev/i2c.h b/drivers/gpu/drm/nouveau/include/nvkm/subdev/i2c.h index 864d1aba7b68..a63c5ac69f66 100644 --- a/drivers/gpu/drm/nouveau/include/nvkm/subdev/i2c.h +++ b/drivers/gpu/drm/nouveau/include/nvkm/subdev/i2c.h @@ -108,6 +108,22 @@ nvkm_rdi2cr(struct i2c_adapter *adap, u8 addr, u8 reg) } static inline int +nv_rd16i2cr(struct i2c_adapter *adap, u8 addr, u8 reg) +{ + u8 val[2]; + struct i2c_msg msgs[] = { + { .addr = addr, .flags = 0, .len = 1, .buf = ® }, + { .addr = addr, .flags = I2C_M_RD, .len = 2, .buf = val }, + }; + + int ret = i2c_transfer(adap, msgs, ARRAY_SIZE(msgs)); + if (ret != 2) + return -EIO; + + return val[0] << 8 | val[1]; +} + +static inline int nvkm_wri2cr(struct i2c_adapter *adap, u8 addr, u8 reg, u8 val) { u8 buf[2] = { reg, val }; @@ -122,6 +138,21 @@ nvkm_wri2cr(struct i2c_adapter *adap, u8 addr, u8 reg, u8 val) return 0; } +static inline int +nv_wr16i2cr(struct i2c_adapter *adap, u8 addr, u8 reg, u16 val) +{ + u8 buf[3] = { reg, val >> 8, val & 0xff}; + struct i2c_msg msgs[] = { + { .addr = addr, .flags = 0, .len = 3, .buf = buf }, + }; + + int ret = i2c_transfer(adap, msgs, ARRAY_SIZE(msgs)); + if (ret != 1) + return -EIO; + + return 0; +} + static inline bool nvkm_probe_i2c(struct i2c_adapter *adap, u8 addr) { |