Hi all,
This patch series adds support for MSIOF on R-Car V3U.
I tested it on Falcon, with MSIOF1 TXD/RXD loopback (connect pins 5/6 of
CN5), CONFIG_SPI_LOOPBACK_TEST, loopback=1, and the following appended
to arch/arm64/boot/dts/renesas/r8a779a0-falcon.dts:
&msiof1 {
#address-cells = <1>;
#size-cells = <0>;
status = "okay";
loopback@0 {
compatible = "linux,spi-loopback-test";
reg = <0>;
spi-max-frequency = <10000000>;
};
};
Although the bootloader defaults for GPSR1 (0xbff7fff) and IP1SR1
(0x00000000) should be correct to configure the pins for the MSIOF1
function, spi-loopback-test failed with:
spi-loopback-test spi0.0: with iteration values: len = 2, tx_off = 0, rx_off = 0
spi-loopback-test spi0.0: loopback strangeness - transfer mismatch on byte 0001 - expected 0x01, but got 0x00
spi-loopback-test spi0.0: spi_msg@(____ptrval____)
spi-loopback-test spi0.0: frame_length: 2
spi-loopback-test spi0.0: actual_length: 2
spi-loopback-test spi0.0: spi_transfer@(____ptrval____)
spi-loopback-test spi0.0: len: 2
spi-loopback-test spi0.0: tx_buf: (____ptrval____)
TX: 00000000: 00 01
spi-loopback-test spi0.0: rx_buf: (____ptrval____)
RX: 00000000: 00 00
spi-loopback-test spi0.0: test failed - test returned -22, but we expect 0
spi-loopback-test spi0.0: Finished spi-loopback-tests with return: -22
spi-loopback-test: probe of spi0.0 failed with error -22
Note that the tests before (len = 1) did succeed...
I will retry after we have proper pinctrl support.
Thanks for your comments!
Geert Uytterhoeven (2):
[RFC] clk: renesas: r8a779a0: Add MSIOF clocks
[RFC] arm64: dts: renesas: r8a779a0: Add dmac1 placeholder node
Koji Matsuoka (1):
[RFC] arm64: dts: renesas: r8a779a0: Add MSIOF device nodes
Wolfram Sang (1):
spi: renesas,sh-msiof: Add r8a779a0 (V3U) support
.../bindings/spi/renesas,sh-msiof.yaml | 1 +
arch/arm64/boot/dts/renesas/r8a779a0.dtsi | 96 +++++++++++++++++++
drivers/clk/renesas/r8a779a0-cpg-mssr.c | 6 ++
3 files changed, 103 insertions(+)
--
2.25.1
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
