Merge branch 'parisc-4.9-1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller...

[cascardo/linux.git] / drivers / spi / spi-dw.c

diff --git a/drivers/spi/spi-dw.c b/drivers/spi/spi-dw.c
index c09bb74..27960e4 100644 (file)
--- a/drivers/spi/spi-dw.c
+++ b/drivers/spi/spi-dw.c
@@ -283,7 +283,6 @@ static int dw_spi_transfer_one(struct spi_master *master,
        struct chip_data *chip = spi_get_ctldata(spi);
        u8 imask = 0;
        u16 txlevel = 0;
-       u16 clk_div;
        u32 cr0;
        int ret;
 
@@ -298,13 +297,13 @@ static int dw_spi_transfer_one(struct spi_master *master,
        spi_enable_chip(dws, 0);
 
        /* Handle per transfer options for bpw and speed */
-       if (transfer->speed_hz != chip->speed_hz) {
-               /* clk_div doesn't support odd number */
-               clk_div = (dws->max_freq / transfer->speed_hz + 1) & 0xfffe;
-
-               chip->speed_hz = transfer->speed_hz;
-               chip->clk_div = clk_div;
-
+       if (transfer->speed_hz != dws->current_freq) {
+               if (transfer->speed_hz != chip->speed_hz) {
+                       /* clk_div doesn't support odd number */
+                       chip->clk_div = (DIV_ROUND_UP(dws->max_freq, transfer->speed_hz) + 1) & 0xfffe;
+                       chip->speed_hz = transfer->speed_hz;
+               }
+               dws->current_freq = transfer->speed_hz;
                spi_set_clk(dws, chip->clk_div);
        }
        if (transfer->bits_per_word == 8) {