[PATCH 1/2] i2c: qcom-geni: Provide an option to select FIFO processing

[Lee Jones]

Signed-off-by: Lee Jones <lee.jo...@linaro.org>
---
 drivers/i2c/busses/i2c-qcom-geni.c | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/drivers/i2c/busses/i2c-qcom-geni.c 
b/drivers/i2c/busses/i2c-qcom-geni.c
index a89bfce5388e..dfdbce067827 100644
--- a/drivers/i2c/busses/i2c-qcom-geni.c
+++ b/drivers/i2c/busses/i2c-qcom-geni.c
@@ -353,13 +353,16 @@ static void geni_i2c_tx_fsm_rst(struct geni_i2c_dev *gi2c)
 static int geni_i2c_rx_one_msg(struct geni_i2c_dev *gi2c, struct i2c_msg *msg,
                                u32 m_param)
 {
+       struct device_node *np = gi2c->se.dev->of_node;
        dma_addr_t rx_dma;
        unsigned long time_left;
-       void *dma_buf;
+       void *dma_buf = NULL;
        struct geni_se *se = &gi2c->se;
        size_t len = msg->len;
 
-       dma_buf = i2c_get_dma_safe_msg_buf(msg, 32);
+       if (!of_property_read_bool(np, "qcom,geni-se-fifo"))
+               dma_buf = i2c_get_dma_safe_msg_buf(msg, 32);
+
        if (dma_buf)
                geni_se_select_mode(se, GENI_SE_DMA);
        else
@@ -392,13 +395,16 @@ static int geni_i2c_rx_one_msg(struct geni_i2c_dev *gi2c, 
struct i2c_msg *msg,
 static int geni_i2c_tx_one_msg(struct geni_i2c_dev *gi2c, struct i2c_msg *msg,
                                u32 m_param)
 {
+       struct device_node *np = gi2c->se.dev->of_node;
        dma_addr_t tx_dma;
        unsigned long time_left;
-       void *dma_buf;
+       void *dma_buf = NULL;
        struct geni_se *se = &gi2c->se;
        size_t len = msg->len;
 
-       dma_buf = i2c_get_dma_safe_msg_buf(msg, 32);
+       if (!of_property_read_bool(np, "qcom,geni-se-fifo"))
+               dma_buf = i2c_get_dma_safe_msg_buf(msg, 32);
+
        if (dma_buf)
                geni_se_select_mode(se, GENI_SE_DMA);
        else
-- 
2.17.1