spi: stm32: deprecate `st,spi-midi-ns` property

The `st,spi-midi-ns` property, which was used to set a nanosecond delay
between transferred words, is now deprecated.
This functionality is now supported by the SPI framework through the
`spi_transfer` struct's `word_delay` variable.
Therefore, the private `st,spi-midi-ns` property is no longer needed and
has been deprecated in favor of the generic solution.

Signed-off-by: Clément Le Goffic <clement.legoffic@foss.st.com>
Link: https://patch.msgid.link/20250616-spi-upstream-v1-5-7e8593f3f75d@foss.st.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/drivers/spi/spi-stm32.c b/drivers/spi/spi-stm32.c
index 8581f24c111f71b33cd1fa0ad794e716dc5ee6f3..3d20f09f1ae7edbfd94d4b830ca7c33b127284a9 100644 (file)
--- a/drivers/spi/spi-stm32.c
+++ b/drivers/spi/spi-stm32.c
@@ -283,7 +283,7 @@ struct stm32_spi_cfg {
        int (*config)(struct stm32_spi *spi);
        void (*set_bpw)(struct stm32_spi *spi);
        int (*set_mode)(struct stm32_spi *spi, unsigned int comm_type);
-       void (*set_data_idleness)(struct stm32_spi *spi, u32 length);
+       void (*set_data_idleness)(struct stm32_spi *spi, struct spi_transfer *xfer);
        int (*set_number_of_data)(struct stm32_spi *spi, u32 length);
        void (*write_tx)(struct stm32_spi *spi);
        void (*read_rx)(struct stm32_spi *spi);
@@ -1880,11 +1880,26 @@ static int stm32h7_spi_set_mode(struct stm32_spi *spi, unsigned int comm_type)
  * stm32h7_spi_data_idleness - configure minimum time delay inserted between two
  *                            consecutive data frames in host mode
  * @spi: pointer to the spi controller data structure
- * @len: transfer len
+ * @xfer: pointer to spi transfer
  */
-static void stm32h7_spi_data_idleness(struct stm32_spi *spi, u32 len)
+static void stm32h7_spi_data_idleness(struct stm32_spi *spi, struct spi_transfer *xfer)
 {
        u32 cfg2_clrb = 0, cfg2_setb = 0;
+       u32 len = xfer->len;
+       u32 spi_delay_ns;
+
+       spi_delay_ns = spi_delay_to_ns(&xfer->word_delay, xfer);
+
+       if (spi->cur_midi != 0) {
+               dev_warn(spi->dev, "st,spi-midi-ns DT property is deprecated\n");
+               if (spi_delay_ns) {
+                       dev_warn(spi->dev, "Overriding st,spi-midi-ns with word_delay_ns %d\n",
+                                spi_delay_ns);
+                               spi->cur_midi = spi_delay_ns;
+                       }
+       } else {
+               spi->cur_midi = spi_delay_ns;
+       }
 
        cfg2_clrb |= STM32H7_SPI_CFG2_MIDI;
        if ((len > 1) && (spi->cur_midi > 0)) {
@@ -1975,7 +1990,7 @@ static int stm32_spi_transfer_one_setup(struct stm32_spi *spi,
        spi->cur_comm = comm_type;
 
        if (STM32_SPI_HOST_MODE(spi) && spi->cfg->set_data_idleness)
-               spi->cfg->set_data_idleness(spi, transfer->len);
+               spi->cfg->set_data_idleness(spi, transfer);
 
        if (spi->cur_bpw <= 8)
                nb_words = transfer->len;