Merge branch 'master' of https://source.denx.de/u-boot/custodians/u-boot-sunxi

This updates the "old style" DTs to that of Linux v6.10, matching what
OF_UPSTREAM is at now. Hopefully we won't need to do this (manually)
anymore. Since this brings in the DT for a new board (Tanix TX1), also
add the defconfig for that, which has just been waiting for that sync.
There are three more fixes: two for the SPI clock setup, which avoids
too high frequencies in some cases, and one fix to avoid a build warning
with GCC 14 for the sunxi TOC0 part of the mkimage tool.

The gitlab CI passed, and I tested the SPI flash on the OrangePi Zero 3
and also booted that into Linux.

1 files changed, 9 insertions, 7 deletions

diff --git a/drivers/spi/spi-sunxi.c b/drivers/spi/spi-sunxi.c
index a7333d8d9c0..88550b8ea84 100644
--- a/drivers/spi/spi-sunxi.c
+++ b/drivers/spi/spi-sunxi.c
@@ -233,7 +233,7 @@ err_ahb:
 static void sun4i_spi_set_speed_mode(struct udevice *dev)
 {
 	struct sun4i_spi_priv *priv = dev_get_priv(dev);
-	unsigned int div;
+	unsigned int div, div_cdr2;
 	u32 reg;
 
 	/*
@@ -249,6 +249,8 @@ static void sun4i_spi_set_speed_mode(struct udevice *dev)
 	 * We have two choices there. Either we can use the clock
 	 * divide rate 1, which is calculated thanks to this formula:
 	 * SPI_CLK = MOD_CLK / (2 ^ (cdr + 1))
+	 * Or for sun6i/sun8i variants:
+	 * SPI_CLK = MOD_CLK / (2 ^ cdr)
 	 * Or we can use CDR2, which is calculated with the formula:
 	 * SPI_CLK = MOD_CLK / (2 * (cdr + 1))
 	 * Whether we use the former or the latter is set through the
@@ -256,18 +258,18 @@ static void sun4i_spi_set_speed_mode(struct udevice *dev)
 	 *
 	 * First try CDR2, and if we can't reach the expected
 	 * frequency, fall back to CDR1.
+	 * There is one exception if the requested clock is the input
+	 * clock. In that case we always use CDR1 because we'll get a
+	 * 1:1 ration for sun6i/sun8i variants.
 	 */
 
 	div = DIV_ROUND_UP(SUNXI_INPUT_CLOCK, priv->freq);
+	div_cdr2 = DIV_ROUND_UP(div, 2);
 	reg = readl(SPI_REG(priv, SPI_CCR));
 
-	if ((div / 2) <= (SUN4I_CLK_CTL_CDR2_MASK + 1)) {
-		div /= 2;
-		if (div > 0)
-			div--;
-
+	if (div != 1 && (div_cdr2 <= (SUN4I_CLK_CTL_CDR2_MASK + 1))) {
 		reg &= ~(SUN4I_CLK_CTL_CDR2_MASK | SUN4I_CLK_CTL_DRS);
-		reg |= SUN4I_CLK_CTL_CDR2(div) | SUN4I_CLK_CTL_DRS;
+		reg |= SUN4I_CLK_CTL_CDR2(div_cdr2 - 1) | SUN4I_CLK_CTL_DRS;
 	} else {
 		div = fls(div - 1);
 		/* The F1C100s encodes the divider as 2^(n+1) */