spi: sunxi: Add support for R329/D1/R528/T113 SPI controller
These SoCs have two SPI controllers that are quite similar to the SPI
on previous Allwinner SoCs. The main difference is that new SoCs
don't have a clock divider (SPI_CCR register) inside SPI IP.
Instead SPI sample mode should be configured depending on the input clock.
For now SPI input clock source selection is not supported by this driver,
and only HOSC@24MHz can be used as input clock. Therefore, according to
the, manual we could change the SPI sample mode from delay half
cycle(default) to normal.
This patch adds a quirk for this kind of SPI controllers
Signed-off-by: Maksim Kiselev <bigunclemax@gmail.com>
Tested-by: Sam Edwards <CFSworks@gmail.com>
Reviewed-by: Andre Przywara <andre.przywara@arm.com>
diff --git a/drivers/spi/spi-sunxi.c b/drivers/spi/spi-sunxi.c
index c56d82d..9ec6b35 100644
--- a/drivers/spi/spi-sunxi.c
+++ b/drivers/spi/spi-sunxi.c
@@ -117,6 +117,8 @@
SPI_TCR_XCH,
SPI_TCR_CS_MANUAL,
SPI_TCR_CS_LEVEL,
+ SPI_TCR_SDC,
+ SPI_TCR_SDM,
SPI_FCR_TF_RST,
SPI_FCR_RF_RST,
SPI_FSR_RF_CNT_MASK,
@@ -128,6 +130,7 @@
u32 fifo_depth;
bool has_soft_reset;
bool has_burst_ctl;
+ bool has_clk_ctl;
};
struct sun4i_spi_plat {
@@ -302,7 +305,19 @@
setbits_le32(SPI_REG(priv, SPI_TCR), SPI_BIT(priv, SPI_TCR_CS_MANUAL) |
SPI_BIT(priv, SPI_TCR_CS_ACTIVE_LOW));
- sun4i_spi_set_speed_mode(dev->parent);
+ if (priv->variant->has_clk_ctl) {
+ sun4i_spi_set_speed_mode(dev->parent);
+ } else {
+ /*
+ * At this moment there is no ability to change input clock.
+ * Therefore, we can only use default HOSC@24MHz clock and
+ * set SPI sampling mode to normal
+ */
+ clrsetbits_le32(SPI_REG(priv, SPI_TCR),
+ SPI_BIT(priv, SPI_TCR_SDC) |
+ SPI_BIT(priv, SPI_TCR_SDM),
+ SPI_BIT(priv, SPI_TCR_SDM));
+ }
return 0;
}
@@ -516,6 +531,8 @@
[SPI_TCR_CS_MASK] = 0x30,
[SPI_TCR_CS_MANUAL] = BIT(6),
[SPI_TCR_CS_LEVEL] = BIT(7),
+ [SPI_TCR_SDC] = BIT(11),
+ [SPI_TCR_SDM] = BIT(13),
[SPI_TCR_XCH] = BIT(31),
[SPI_FCR_RF_RST] = BIT(15),
[SPI_FCR_TF_RST] = BIT(31),
@@ -526,6 +543,7 @@
.regs = sun4i_spi_regs,
.bits = sun4i_spi_bits,
.fifo_depth = 64,
+ .has_clk_ctl = true,
};
static const struct sun4i_spi_variant sun6i_a31_spi_variant = {
@@ -534,6 +552,7 @@
.fifo_depth = 128,
.has_soft_reset = true,
.has_burst_ctl = true,
+ .has_clk_ctl = true,
};
static const struct sun4i_spi_variant sun8i_h3_spi_variant = {
@@ -542,8 +561,17 @@
.fifo_depth = 64,
.has_soft_reset = true,
.has_burst_ctl = true,
+ .has_clk_ctl = true,
};
+static const struct sun4i_spi_variant sun50i_r329_spi_variant = {
+ .regs = sun6i_spi_regs,
+ .bits = sun6i_spi_bits,
+ .fifo_depth = 64,
+ .has_soft_reset = true,
+ .has_burst_ctl = true,
+};
+
static const struct udevice_id sun4i_spi_ids[] = {
{
.compatible = "allwinner,sun4i-a10-spi",
@@ -557,6 +585,10 @@
.compatible = "allwinner,sun8i-h3-spi",
.data = (ulong)&sun8i_h3_spi_variant,
},
+ {
+ .compatible = "allwinner,sun50i-r329-spi",
+ .data = (ulong)&sun50i_r329_spi_variant,
+ },
{ /* sentinel */ }
};