Hello,
We are using four ecspi from imx6ul.When i used cs as gpio then everything works fine.
But when i used CS as native. It wont work.
Following configuration i have done for native CS in dts as,
&ecspi1 {
fsl,spi-num-chipselects = <1>;
cs-gpios = <0>;
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_ecspi1 &pinctrl_spi_cs1>;
status = "okay";
spi1_max14830: max14830@0 {
compatible = "maxim,max14830";
reg = <0>;
mode = <0>;
clocks = <&clk10m>;
clock-names = "osc";
interrupt-parent = <&gpio4>;
interrupts = <10 IRQ_TYPE_EDGE_FALLING >;
gpio-controller;
#gpio-cells = <2>;
spi-max-frequency = <10000000>;
};
};
Pin Mux
pinctrl_ecspi1: ecspi1grp {
fsl,pins = <
MX6UL_PAD_CSI_DATA04__ECSPI1_SCLK 0x10a0
/* MX6UL_PAD_CSI_DATA05__ECSPI1_SS0 0x10b0 */
/* MX6UL_PAD_CSI_DATA05__GPIO4_IO26 0x10a0 */
MX6UL_PAD_CSI_DATA06__ECSPI1_MOSI 0x10a0
MX6UL_PAD_CSI_DATA07__ECSPI1_MISO 0x10a0
MX6UL_PAD_NAND_ALE__GPIO4_IO10 0x10a0
>;
};
pinctrl_spi_cs1: spi_cs1 {
fsl,pins = <
MX6UL_PAD_CSI_DATA05__ECSPI1_SS0 0x10b0
>;
};
When I configure same interface with CS as gpio
cs-gpios = <&gpio4 26 GPIO_ACTIVE_LOW>;
It works fine.
Why it doesnot work with native cs?
I am using the Kernel 4.9 and spi-imx driver. Can you please help me in this issue.
Regards,
Surendra
解決済! 解決策の投稿を見る。
Hi Surendra,
Natve chip select usage on spi-imx driver has been fixed commit 602c8f4485cd1e6de67e41c78db96fa4f6808e53
Author: Greg Ungerer <gerg@linux-m68k.org>
Date: Tue Jul 11 14:22:11 2017 +1000
spi: imx: fix use of native chip-selects with devicetree
from 4.14 kernel.
So you could either use GPIO chip select or backport this fix into 4.9.
Regards,
Fabio Estevam
Hi Surendra,
Natve chip select usage on spi-imx driver has been fixed commit 602c8f4485cd1e6de67e41c78db96fa4f6808e53
Author: Greg Ungerer <gerg@linux-m68k.org>
Date: Tue Jul 11 14:22:11 2017 +1000
spi: imx: fix use of native chip-selects with devicetree
from 4.14 kernel.
So you could either use GPIO chip select or backport this fix into 4.9.
Regards,
Fabio Estevam
Hello Fabio,
I am using the imx6ul. In spi-imx driver configuration is under mx51_ecspi_config.
The patch you mentioned is only for the mx31_config and mx21_config. So this patch not applicable to mx51 ecspi configuration.
Thanks,
Surendra
Hi Surendra
please try below patch
kernel/git/next/linux-next.git - The linux-next integration testing tree
Best regards
igor
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Hello igor,
Thanks for quick reply . I have applied same patch. But same result.
Same results. ( when i configure cs-gpio = <0> and with this patch). When i debuggging the code spi->chip_select is configured, but doesnot reading the correct data ( like REV ID) from the slave device.
The functionality of the spi-imx driver working fine with native CS?
Thanks & Regards,
Surendra
Hi Surendra
please post this on kernel mail list,
Majordomo Lists at VGER.KERNEL.ORG
nxp bsp does not support native CS.
Best regards
igor
Hello Igor,
I am using NXP repository kernel 4.9
This does not have native CS support'?
Means I can use only GPIO Chip select ?