Store DMA mapping data in geni_i2c_dev struct to enhance DMA mapping
data scope. For example during shutdown callback to unmap DMA mapping,
this stored DMA mapping data can be used to call geni_se_tx_dma_unprep
and geni_se_rx_dma_unprep functions.
Signed-off-by: Roja Rani Yarubandi <rojay@xxxxxxxxxxxxxx>
---
Changes in V2:
- As per Stephen's comments, changed commit text, fixed minor nitpicks.
drivers/i2c/busses/i2c-qcom-geni.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/drivers/i2c/busses/i2c-qcom-geni.c b/drivers/i2c/busses/i2c-qcom-geni.c
index 7f130829bf01..1fda5c7c2cfc 100644
--- a/drivers/i2c/busses/i2c-qcom-geni.c
+++ b/drivers/i2c/busses/i2c-qcom-geni.c
@@ -86,6 +86,9 @@ struct geni_i2c_dev {
u32 clk_freq_out;
const struct geni_i2c_clk_fld *clk_fld;
int suspended;
+ dma_addr_t tx_dma;
+ dma_addr_t rx_dma;
+ size_t xfer_len;
};
struct geni_i2c_err_log {
@@ -358,6 +361,7 @@ static int geni_i2c_rx_one_msg(struct geni_i2c_dev *gi2c, struct i2c_msg *msg,
struct geni_se *se = &gi2c->se;
size_t len = msg->len;
+ gi2c->xfer_len = msg->len;
if (!of_machine_is_compatible("lenovo,yoga-c630"))
dma_buf = i2c_get_dma_safe_msg_buf(msg, 32);
@@ -384,6 +388,7 @@ static int geni_i2c_rx_one_msg(struct geni_i2c_dev *gi2c, struct i2c_msg *msg,
if (dma_buf) {
if (gi2c->err)
geni_i2c_rx_fsm_rst(gi2c);
+ gi2c->rx_dma = rx_dma;
geni_se_rx_dma_unprep(se, rx_dma, len);
i2c_put_dma_safe_msg_buf(dma_buf, msg, !gi2c->err);
}
@@ -400,6 +405,7 @@ static int geni_i2c_tx_one_msg(struct geni_i2c_dev *gi2c, struct i2c_msg *msg,
struct geni_se *se = &gi2c->se;
size_t len = msg->len;
+ gi2c->xfer_len = msg->len;
if (!of_machine_is_compatible("lenovo,yoga-c630"))
dma_buf = i2c_get_dma_safe_msg_buf(msg, 32);
@@ -429,6 +435,7 @@ static int geni_i2c_tx_one_msg(struct geni_i2c_dev *gi2c, struct i2c_msg *msg,
if (dma_buf) {
if (gi2c->err)
geni_i2c_tx_fsm_rst(gi2c);
+ gi2c->tx_dma = tx_dma;
geni_se_tx_dma_unprep(se, tx_dma, len);
i2c_put_dma_safe_msg_buf(dma_buf, msg, !gi2c->err);
}
--
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