u-boot.git/drivers/spi, branch v2024.10

mtd: spi: renesas: Add R-Car Gen4 DT compatible

2024-09-08T23:10:33Z

Add device tree compatible string "renesas,rcar-gen4-rpc-if" to the driver to match on upstream RPC DT node in R-Car Gen4 DTs. Signed-off-by: Marek Vasut

mtd: spi: renesas: Configure RPC PHY timing registers

2024-09-08T23:10:33Z

Make sure RPC PHY timing registers are configured before performing bus access. These registers might have been left unconfigured or may have been configured by a prior stage bootloader and leaving them unconfigured or misconfigured would interfere with U-Boot operation. Set PHYOFFSET1 DDRTMG field to 3 which enables DDR timing adjustment when SPIDRE or DRDRE = 0 and set PHYOFFSET2 OCTTMG field to 4 which makes the interface operate in Serial flash or HyperFlash mode. Signed-off-by: Marek Vasut

mtd: spi: renesas: Configure DRDRENR register

2024-09-08T23:10:33Z

Make sure DRDRENR register is configured before performing external address space read. This register might have been configured by a prior stage bootloader and leaving it unconfigured would interfere with U-Boot operation. Since U-Boot RPC SPI driver does not support DDR data transfer mode yet, set this register unconditionally to 0. Signed-off-by: Marek Vasut

mtd: spi: renesas: Write DRDMCR register once

2024-09-08T23:10:33Z

Instead of writing DRDMCR with 0 first and then overwriting DRDMCR again in case any dummy bytes have to be sent out, write DRDMCR in every case with the amount of dummy bytes that have to be sent out. In case no dummy bytes have to be sent out, the value written into DRDMCR is zero, so no dummy bytes are sent out. No functional change. Signed-off-by: Marek Vasut

mtd: spi: renesas: Write DREAR register once

2024-09-08T23:10:33Z

Instead of writing DREAR with 0 first and then overwriting DREAR again in case of 4 byte addressing mode, write DREAR in every case once with the correct content right away. No functional change. Signed-off-by: Marek Vasut

spi: sunxi: fix clock divider calculation for max frequency setting

2024-08-06T10:20:10Z

If the maximum frequency is requested, we still fall into the CDR2 handling. But there the minimal divider is 2. For the sun6i and sun8i we can do better with the CDR1 setting where the minimal divider is 1: SPI_CLK = MOD_CLK / 2 ^ cdr with cdr = 0 Thus, handle the div = 1 case specially. While at it, correct the comment above the calculation. Signed-off-by: Michael Walle Reviewed-by: Andre Przywara

spi: sunxi: fix CDR2 calculation

2024-08-06T10:20:10Z

The CDR2 divider calculation always yield a frequency greater than the requested one. Use DIV_ROUND_UP() to keep the frequency equal or below the requested one. This way, we can also drop the "if div > 0" check because we know for a fact that div cannot be zero. FWIW, this aligns the CDR2 calculation with the linux driver. Suggested-by: Andre Przywara Signed-off-by: Michael Walle Reviewed-by: Andre Przywara

drivers: spi: Remove duplicate newlines

2024-07-22T16:53:06Z

Drop all duplicate newlines. No functional change. Signed-off-by: Marek Vasut Reviewed-by: Michal Simek

spi: sunxi: drop max_hz handling

2024-07-16T00:40:40Z

The driver is trying to read the "spi-max-frequency" property of the *controller* driver node. There is no such property. The "spi-max-frequency" property belongs to the SPI devices on the bus. Right now, the driver will always fall back to the default value of 1MHz and thus flash reads are very slow with just about 215kb/s. In fact, the SPI uclass will already take care of everything and we just have to clamp the frequency to the values the driver/hardware supports. Thus, drop the whole max_hz handling. Signed-off-by: Michael Walle Reviewed-by: Andre Przywara Tested-by: Andre Przywara

spi: mtk_spim: add support for upstream mediatek, spi-ipm compatible

2024-07-08T17:45:50Z

Upstream kernel linux use a different compatible mediatek,spi-ipm. Add support for this compatible and add handling for the additional clock similar to how it's done by the upstream driver and handling for all the property enabled by default. Signed-off-by: Christian Marangi