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| author | Shilpasri G Bhat <shilpa.bhat@linux.vnet.ibm.com> | 2017-06-02 15:55:46 +0530 |
|---|---|---|
| committer | Stewart Smith <stewart@linux.vnet.ibm.com> | 2017-06-06 20:49:05 +1000 |
| commit | c5fa0d718e9cda8999dcb83088118a7ea61814c5 (patch) | |
| tree | 086b5cd211b8b4ab6591fa24d281c9443de50418 /include | |
| parent | 682da462cdcd79b668c2f1999bb9cf955cbef63d (diff) | |
| download | skiboot-c5fa0d718e9cda8999dcb83088118a7ea61814c5.zip skiboot-c5fa0d718e9cda8999dcb83088118a7ea61814c5.tar.gz skiboot-c5fa0d718e9cda8999dcb83088118a7ea61814c5.tar.bz2 | |
p8-i2c: occ: Add support for OCC to use I2C engines
This patch adds support to share the I2C engines with host and OCC.
OCC uses I2C engines to read DIMM temperatures and to communicate with
GPU. OCC Flag register is used for locking between host and OCC. Host
requests for the bus by setting a bit in OCC Flag register. OCC sends
an interrupt to indicate the change in ownership.
Originally-from: Oliver O'Halloran <oohall@gmail.com>
Signed-off-by: Shilpasri G Bhat <shilpa.bhat@linux.vnet.ibm.com>
[stewart@linux.vnet.ibm.com: Pretty heavily rework logic, including
fixing bus owner change and separating out occ lock from sensor cache]
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/i2c.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/i2c.h b/include/i2c.h index 2c4c6a1..e5e8584 100644 --- a/include/i2c.h +++ b/include/i2c.h @@ -110,4 +110,7 @@ static inline int i2c_check_quirk(struct i2c_request *req, int *rc) extern void p8_i2c_init(void); extern void p8_i2c_interrupt(uint32_t chip_id); +/* P9 I2C Ownership Change OCC interrupt handler */ +extern void p9_i2c_bus_owner_change(u32 chip_id); + #endif /* __I2C_H */ |