Merge tag 'spi-v6.2-rc8-abi' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi

Pull spi fix from Mark Brown:
 "One more last minute patch for v6.2 updating the parsing of the newly
  added spi-cs-setup-delay-ns.

  It's been pointed out that due to the way DT parsing works the change
  in property size is ABI visible so let's not let a release go out
  without it being fixed. The change got split from some earlier ABI
  related fixes to the property since the first version sent had a build
  error"

* tag 'spi-v6.2-rc8-abi' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi:
  spi: Use a 32-bit DT property for spi-cs-setup-delay-ns

1 files changed, 18 insertions, 5 deletions

diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
index 15f174f4e0561..3f33934f5429a 100644
--- a/drivers/spi/spi.c
+++ b/drivers/spi/spi.c
@@ -2220,11 +2220,26 @@ void spi_flush_queue(struct spi_controller *ctlr)
 /*-------------------------------------------------------------------------*/
 
 #if defined(CONFIG_OF)
+static void of_spi_parse_dt_cs_delay(struct device_node *nc,
+				     struct spi_delay *delay, const char *prop)
+{
+	u32 value;
+
+	if (!of_property_read_u32(nc, prop, &value)) {
+		if (value > U16_MAX) {
+			delay->value = DIV_ROUND_UP(value, 1000);
+			delay->unit = SPI_DELAY_UNIT_USECS;
+		} else {
+			delay->value = value;
+			delay->unit = SPI_DELAY_UNIT_NSECS;
+		}
+	}
+}
+
 static int of_spi_parse_dt(struct spi_controller *ctlr, struct spi_device *spi,
 			   struct device_node *nc)
 {
 	u32 value;
-	u16 cs_setup;
 	int rc;
 
 	/* Mode (clock phase/polarity/etc.) */
@@ -2310,10 +2325,8 @@ static int of_spi_parse_dt(struct spi_controller *ctlr, struct spi_device *spi,
 	if (!of_property_read_u32(nc, "spi-max-frequency", &value))
 		spi->max_speed_hz = value;
 
-	if (!of_property_read_u16(nc, "spi-cs-setup-delay-ns", &cs_setup)) {
-		spi->cs_setup.value = cs_setup;
-		spi->cs_setup.unit = SPI_DELAY_UNIT_NSECS;
-	}
+	/* Device CS delays */
+	of_spi_parse_dt_cs_delay(nc, &spi->cs_setup, "spi-cs-setup-delay-ns");
 
 	return 0;
 }