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boards: teensy41: Enable DAT3 pull detection for USDHC

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teensy41 has no chip detect signal for SD slot. Use DAT3 pull card
detection. Remove software defined chip detect IOMUXC selection that was
used as a dummy pin.

Fixes #42227

Signed-off-by: Daniel DeGrasse <daniel.degrasse@nxp.com>
This commit is contained in:
Daniel DeGrasse 2022-02-01 19:11:10 -06:00 • committed by Carles Cufí
commit 2355fe86da
3 changed files with 32 additions and 4 deletions
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10
boards/arm/teensy4/Kconfig.defconfig
View file

@ -21,4 +21,14 @@ endchoice
config DISK_DRIVER_SDMMC
default y if DISK_DRIVERS
if DISK_DRIVER_SDMMC
config SDMMC_USDHC_DAT3_PWR_TOGGLE
default y
config SDMMC_USDHC_DAT3_PWR_DELAY
default 10
endif # DISK_DRIVER_SDMMC
endif # BOARD_TEENSY40 || BOARD_TEENSY41

24
boards/arm/teensy4/pinmux.c
View file

@ -55,7 +55,6 @@ static void teensy4_usdhc_pinmux(uint16_t nusdhc, bool init, uint32_t speed,
}
if (init) {
IOMUXC_SetPinMux(IOMUXC_GPIO_EMC_35_GPIO3_IO21, 0U);
IOMUXC_SetPinMux(IOMUXC_GPIO_EMC_41_USDHC1_VSELECT, 0U);
IOMUXC_SetPinMux(IOMUXC_GPIO_SD_B0_00_USDHC1_CMD, 0U);
IOMUXC_SetPinMux(IOMUXC_GPIO_SD_B0_01_USDHC1_CLK, 0U);
@ -64,9 +63,6 @@ static void teensy4_usdhc_pinmux(uint16_t nusdhc, bool init, uint32_t speed,
IOMUXC_SetPinMux(IOMUXC_GPIO_SD_B0_04_USDHC1_DATA2, 0U);
IOMUXC_SetPinMux(IOMUXC_GPIO_SD_B0_05_USDHC1_DATA3, 0U);
/* SD0_CD_SW */
IOMUXC_SetPinConfig(IOMUXC_GPIO_EMC_35_GPIO3_IO21, 0x017089u);
/* SD0_VSELECT */
IOMUXC_SetPinConfig(IOMUXC_GPIO_EMC_41_USDHC1_VSELECT,
0x0170A1u);
@ -79,6 +75,25 @@ static void teensy4_usdhc_pinmux(uint16_t nusdhc, bool init, uint32_t speed,
IOMUXC_SetPinConfig(IOMUXC_GPIO_SD_B0_04_USDHC1_DATA2, cmd_data);
IOMUXC_SetPinConfig(IOMUXC_GPIO_SD_B0_05_USDHC1_DATA3, cmd_data);
}
static void teensy4_usdhc_dat3_pull(bool pullup)
{
if (pullup) {
/* Set pin config to pull up (47k Ohm) */
IOMUXC_SetPinConfig(IOMUXC_GPIO_SD_B0_05_USDHC1_DATA3,
IOMUXC_SW_PAD_CTL_PAD_SPEED(1) | IOMUXC_SW_PAD_CTL_PAD_SRE_MASK |
IOMUXC_SW_PAD_CTL_PAD_PKE_MASK | IOMUXC_SW_PAD_CTL_PAD_PUE_MASK |
IOMUXC_SW_PAD_CTL_PAD_HYS_MASK | IOMUXC_SW_PAD_CTL_PAD_PUS(1) |
IOMUXC_SW_PAD_CTL_PAD_DSE(1));
} else {
/* pull down (100k Ohm) */
IOMUXC_SetPinConfig(IOMUXC_GPIO_SD_B0_05_USDHC1_DATA3,
IOMUXC_SW_PAD_CTL_PAD_SPEED(1) | IOMUXC_SW_PAD_CTL_PAD_SRE_MASK |
IOMUXC_SW_PAD_CTL_PAD_PKE_MASK | IOMUXC_SW_PAD_CTL_PAD_PUE_MASK |
IOMUXC_SW_PAD_CTL_PAD_HYS_MASK | IOMUXC_SW_PAD_CTL_PAD_PUS(0) |
IOMUXC_SW_PAD_CTL_PAD_DSE(1));
}
}
#endif
static int teensy4_init(const struct device *dev)
@ -393,6 +408,7 @@ static int teensy4_init(const struct device *dev)
#if DT_NODE_HAS_STATUS(DT_NODELABEL(usdhc1), okay) && CONFIG_DISK_DRIVER_SDMMC
teensy4_usdhc_pinmux(0, true, 2, 1);
imxrt_usdhc_pinmux_cb_register(teensy4_usdhc_pinmux);
imxrt_usdhc_dat3_cb_register(teensy4_usdhc_dat3_pull);
#endif
return 0;

2
boards/arm/teensy4/teensy41.dts
View file

@ -27,4 +27,6 @@
&usdhc1 {
status = "okay";
no-1-8-v;
detect-dat3;
};