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| author | Trond Myklebust <trond.myklebust@primarydata.com> | 2015-02-18 07:28:37 -0800 |
|---|---|---|
| committer | Trond Myklebust <trond.myklebust@primarydata.com> | 2015-02-18 07:28:37 -0800 |
| commit | 65d2918e716afb89359cfa59734d76c1ff8700cb (patch) | |
| tree | 4685404f96642243d62c3a1a823340913d087090 /drivers/i2c/busses/i2c-sh_mobile.c | |
| parent | bf40e5561fd288a505d5d8d8bf45eef96fe7253d (diff) | |
| parent | 338d00cfef07d74a072f96821c64b20f98517d72 (diff) | |
| download | lwn-65d2918e716afb89359cfa59734d76c1ff8700cb.tar.gz lwn-65d2918e716afb89359cfa59734d76c1ff8700cb.zip | |
Merge branch 'cleanups'
Merge cleanups requested by Linus.
* cleanups: (3 commits)
pnfs: Refactor the *_layout_mark_request_commit to use pnfs_layout_mark_request_commit
nfs: Can call nfs_clear_page_commit() instead
nfs: Provide and use helper functions for marking a page as unstable
Diffstat (limited to 'drivers/i2c/busses/i2c-sh_mobile.c')
| -rw-r--r-- | drivers/i2c/busses/i2c-sh_mobile.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/drivers/i2c/busses/i2c-sh_mobile.c b/drivers/i2c/busses/i2c-sh_mobile.c index 440d5dbc8b5f..007818b3e174 100644 --- a/drivers/i2c/busses/i2c-sh_mobile.c +++ b/drivers/i2c/busses/i2c-sh_mobile.c @@ -139,6 +139,7 @@ struct sh_mobile_i2c_data { int pos; int sr; bool send_stop; + bool stop_after_dma; struct resource *res; struct dma_chan *dma_tx; @@ -407,7 +408,7 @@ static int sh_mobile_i2c_isr_tx(struct sh_mobile_i2c_data *pd) if (pd->pos == pd->msg->len) { /* Send stop if we haven't yet (DMA case) */ - if (pd->send_stop && (iic_rd(pd, ICCR) & ICCR_BBSY)) + if (pd->send_stop && pd->stop_after_dma) i2c_op(pd, OP_TX_STOP, 0); return 1; } @@ -449,6 +450,13 @@ static int sh_mobile_i2c_isr_rx(struct sh_mobile_i2c_data *pd) real_pos = pd->pos - 2; if (pd->pos == pd->msg->len) { + if (pd->stop_after_dma) { + /* Simulate PIO end condition after DMA transfer */ + i2c_op(pd, OP_RX_STOP, 0); + pd->pos++; + break; + } + if (real_pos < 0) { i2c_op(pd, OP_RX_STOP, 0); break; @@ -536,6 +544,7 @@ static void sh_mobile_i2c_dma_callback(void *data) sh_mobile_i2c_dma_unmap(pd); pd->pos = pd->msg->len; + pd->stop_after_dma = true; iic_set_clr(pd, ICIC, 0, ICIC_TDMAE | ICIC_RDMAE); } @@ -726,6 +735,7 @@ static int sh_mobile_i2c_xfer(struct i2c_adapter *adapter, bool do_start = pd->send_stop || !i; msg = &msgs[i]; pd->send_stop = i == num - 1 || msg->flags & I2C_M_STOP; + pd->stop_after_dma = false; err = start_ch(pd, msg, do_start); if (err) |