Merge tag 'u-boot-rockchip-20240315' of https://source.denx.de/u-boot/custodians/u-boot-rockchip into next

Please pull the updates for rockchip platform:
- Add board: rk3588 Generic, Cool Pi CM5, Theobroma-Systems RK3588 Jaguar SBC,
             Toybrick TB-RK3588X;
             rk3588s Cool Pi 4B;
             rk3566 Pine64 PineTab2;
- Add saradc v2 support;
- Add PMIC RK806 support;
- rk3588 disable force_jtag by default;
- Migrate to use IO-domain driver for all boards;
- Use common bss and stack addresses for rk33xx and rk35xx boards;
- Other updates for driver, config and dts;

1 files changed, 17 insertions, 3 deletions

diff --git a/drivers/spi/rk_spi.c b/drivers/spi/rk_spi.c
index 7de943356ad..c8694fdff95 100644
--- a/drivers/spi/rk_spi.c
+++ b/drivers/spi/rk_spi.c
@@ -453,8 +453,17 @@ static int rockchip_spi_xfer(struct udevice *dev, unsigned int bitlen,
 	 * case of read-only transfers by using the full 16bits of each
 	 * FIFO element.
 	 */
-	if (!out)
+	if (!out) {
 		ret = rockchip_spi_16bit_reader(dev, &in, &len);
+		/*
+		 * If "in" isn't 16b-aligned, we need to send the last byte
+		 * ourselves. We however need to have the controller in RO mode
+		 * which differs from the default.
+		 */
+		clrsetbits_le32(&regs->ctrlr0,
+				TMOD_MASK << TMOD_SHIFT,
+				TMOD_RO << TMOD_SHIFT);
+	}
 
 	/* This is the original 8bit reader/writer code */
 	while (len > 0) {
@@ -465,12 +474,13 @@ static int rockchip_spi_xfer(struct udevice *dev, unsigned int bitlen,
 		rkspi_enable_chip(regs, true);
 
 		toread = todo;
-		towrite = todo;
+		/* Only write if we have something to write */
+		towrite = out ? todo : 0;
 		while (toread || towrite) {
 			u32 status = readl(&regs->sr);
 
 			if (towrite && !(status & SR_TF_FULL)) {
-				writel(out ? *out++ : 0, regs->txdr);
+				writel(*out++, regs->txdr);
 				towrite--;
 			}
 			if (toread && !(status & SR_RF_EMPT)) {
@@ -501,6 +511,10 @@ static int rockchip_spi_xfer(struct udevice *dev, unsigned int bitlen,
 		spi_cs_deactivate(dev, slave_plat->cs);
 
 	rkspi_enable_chip(regs, false);
+	if (!out)
+		clrsetbits_le32(&regs->ctrlr0,
+				TMOD_MASK << TMOD_SHIFT,
+				TMOD_TR << TMOD_SHIFT);
 
 	return ret;
 }