Linux/AM5708: Generation of array pad configurations from pin mux file

Hello Gourav,

Due to the US holidays, on this particular E2E thread, our response may get delayed until the week of Jan 2, 2019.

Warmest Wishes for Happy Holidays and a Happy New Year!

best regards,
David Zhou

gourav roy said:

For those configurations do i need to touch device tree files? if so can you please point out me some examples and reference documents.

Gourav,

Please see the following app note:

AM57xx Sitara™ IO Configuration Requirements
http://www.ti.com/lit/sprac44

The perl script output should be incorporated into your board-specific mux_data.h file.  See u-boot/board/ti/am57xx/mux_data.h for an example from the AM57xx EVM and IDK.

Due to AM57xx Manual I/O configuration constraints, we recommend that all pin muxing is handled in the bootloader.  In other words, you should avoid configuring pin muxing in the device tree and instead perform all your pin muxing in u-boot.

Best regards,
Brad

Thank you Brad for your response.

Actually my doubt is, do we need to modify related device tree files in u-boot along with mux_data.h to make pin mux configurations of customized board applicable.

For example in existing device tree file at u-boot, am57xx-idk-common.dtsi, i2c1 entries are:

&i2c1 {
status = "okay";
clock-frequency = <400000>;

tps659038: tps659038@58 {
compatible = "ti,tps659038";
reg = <0x58>;
interrupts-extended = <&gpio6 16 IRQ_TYPE_LEVEL_HIGH
&dra7_pmx_core 0x418>;
#interrupt-cells = <2>;
interrupt-controller;
ti,system-power-controller;
ti,palmas-override-powerhold;

...............................................

..........................................



But pin mux configurations for custom board have i2c1 and i2c2 also. Do we need to create entry for i2c2 in similar way in device tree file at u-boot level?



Thanks,

Gourav

I don't recall touching any pin muxing in the u-boot device tree in recent board bring-ups I've done. For now the key place is mux_data.h. I'm going to ask one of my colleagues if he has any additional inputs, though he's out this week on vacation.

Thanks Brad,

i think we need to register entries in device tree also..i am working on it. Please provide the inputs on the same once get information from your colleagues.

Regards,
Gourav

Thanks RonB for your response.

Sorry for my ignorance on pinmux configurations and device tree concepts.

I am thinking that we need to register/edit entries in u-boot device tree file along with mux_data.h corresponding to board customization. If we want to change default debug port from UART3 to UART1, we need to change respective UART entries in device tree file and mux_data.h right?

For reference i have pasted complete pad configuration file content in the previous post.

Regards,
Gourav

Gourav,

Yes, you would need to make device tree changes in that case. We're just pointing out that pin muxing is handled through mux_data.h rather than the device tree. FYI, clocking is also done separately.  For reference please see:

arch/arm/mach-omap2/clocks-common.c,  setup_early_clocks(void)

In the case of the console, however, ALL of the UARTs are enabled, so you wouldn't need to make any clock changes if you were changing the UART.

Are you actually planning to change the UART?  I don't recommend doing that.  It's a pain to make and maintain the changes, and also you can only boot from UART3 (if you have used the correct set of pins).

Brad

Brad,

I am not planning to change UART. Just treated it as example.

My problem in simple way, We have customized AM5708 and corresponding pinmux configuration file. Now my question is:

Is it not necessary to change device tree file came with TI's SDK according to hardware changes to make customized board work? if not so please share point me to suitable information.

Below is the content of pad configuration file:

{GPMC_AD0, (M0 | PIN_INPUT)}, /* gpmc_ad0.gpmc_ad0 */
{GPMC_AD1, (M0 | PIN_INPUT)}, /* gpmc_ad1.gpmc_ad1 */
{GPMC_AD2, (M0 | PIN_INPUT)}, /* gpmc_ad2.gpmc_ad2 */
{GPMC_AD3, (M0 | PIN_INPUT)}, /* gpmc_ad3.gpmc_ad3 */
{GPMC_AD4, (M0 | PIN_INPUT)}, /* gpmc_ad4.gpmc_ad4 */
{GPMC_AD5, (M0 | PIN_INPUT)}, /* gpmc_ad5.gpmc_ad5 */
{GPMC_AD6, (M0 | PIN_INPUT)}, /* gpmc_ad6.gpmc_ad6 */
{GPMC_AD7, (M0 | PIN_INPUT)}, /* gpmc_ad7.gpmc_ad7 */
{GPMC_AD8, (M0 | PIN_INPUT)}, /* gpmc_ad8.gpmc_ad8 */
{GPMC_AD9, (M0 | PIN_INPUT)}, /* gpmc_ad9.gpmc_ad9 */
{GPMC_AD10, (M0 | PIN_INPUT)}, /* gpmc_ad10.gpmc_ad10 */
{GPMC_AD11, (M0 | PIN_INPUT)}, /* gpmc_ad11.gpmc_ad11 */
{GPMC_AD12, (M0 | PIN_INPUT)}, /* gpmc_ad12.gpmc_ad12 */
{GPMC_AD13, (M0 | PIN_INPUT)}, /* gpmc_ad13.gpmc_ad13 */
{GPMC_AD14, (M0 | PIN_INPUT)}, /* gpmc_ad14.gpmc_ad14 */
{GPMC_AD15, (M0 | PIN_INPUT)}, /* gpmc_ad15.gpmc_ad15 */
{GPMC_A0, (M14 | PIN_OUTPUT)}, /* gpmc_a0.gpmc_a16 */
{GPMC_A1, (M0 | PIN_OUTPUT)}, /* gpmc_a1.gpmc_a1 */
{GPMC_A2, (M0 | PIN_OUTPUT)}, /* gpmc_a2.gpmc_a2 */
{GPMC_A3, (M0 | PIN_OUTPUT)}, /* gpmc_a3.gpmc_a3 */
{GPMC_A4, (M0 | PIN_OUTPUT)}, /* gpmc_a4.gpmc_a4 */
{GPMC_A5, (M0 | PIN_OUTPUT)}, /* gpmc_a5.gpmc_a5 */
{GPMC_A6, (M0 | PIN_OUTPUT)}, /* gpmc_a6.gpmc_a6 */
{GPMC_A7, (M0 | PIN_OUTPUT)}, /* gpmc_a7.gpmc_a7 */
{GPMC_A8, (M0 | PIN_OUTPUT)}, /* gpmc_a8.gpmc_a8 */
{GPMC_A9, (M0 | PIN_OUTPUT)}, /* gpmc_a9.gpmc_a9 */
{GPMC_A10, (M0 | PIN_OUTPUT)}, /* gpmc_a10.gpmc_a10 */
{GPMC_A11, (M0 | PIN_OUTPUT)}, /* gpmc_a11.gpmc_a11 */
{GPMC_A12, (M0 | PIN_OUTPUT)}, /* gpmc_a12.gpmc_a12 */
{GPMC_A13, (M0 | PIN_OUTPUT)}, /* gpmc_a13.gpmc_a13 */
{GPMC_A14, (M0 | PIN_OUTPUT)}, /* gpmc_a14.gpmc_a14 */
{GPMC_A15, (M0 | PIN_OUTPUT)}, /* gpmc_a15.gpmc_a15 */
{GPMC_A17, (M0 | PIN_OUTPUT)}, /* gpmc_a17.gpmc_a17 */
{GPMC_A18, (M0 | PIN_OUTPUT)}, /* gpmc_a18.gpmc_a18 */
{GPMC_A19, (M0 | PIN_OUTPUT)}, /* gpmc_a19.gpmc_a19 */
{GPMC_A20, (M0 | PIN_OUTPUT)}, /* gpmc_a20.gpmc_a20 */
{GPMC_A21, (M0 | PIN_OUTPUT)}, /* gpmc_a21.gpmc_a21 */
{GPMC_A22, (M0 | PIN_OUTPUT)}, /* gpmc_a22.gpmc_a22 */
{GPMC_A23, (M0 | PIN_OUTPUT)}, /* gpmc_a23.gpmc_a23 */
{GPMC_A24, (M0 | PIN_OUTPUT)}, /* gpmc_a24.gpmc_a24 */
{GPMC_A25, (M0 | PIN_OUTPUT)}, /* gpmc_a25.gpmc_a25 */
{GPMC_A26, (M0 | PIN_OUTPUT)}, /* gpmc_a26.gpmc_a26 */
{GPMC_A27, (M0 | PIN_OUTPUT)}, /* gpmc_a27.gpmc_a27 */
{GPMC_CS1, (M0 | PIN_OUTPUT)}, /* gpmc_cs1.gpmc_cs1 */
{GPMC_CS0, (M0 | PIN_OUTPUT)}, /* gpmc_cs0.gpmc_cs0 */
{GPMC_CS2, (M0 | PIN_OUTPUT)}, /* gpmc_cs2.gpmc_cs2 */
{GPMC_CS3, (M0 | PIN_OUTPUT)}, /* gpmc_cs3.gpmc_cs3 */
{GPMC_CLK, (M8 | PIN_INPUT)}, /* gpmc_clk.i2c3_scl */
{GPMC_ADVN_ALE, (M8 | PIN_INPUT)}, /* gpmc_advn_ale.i2c3_sda */
{GPMC_OEN_REN, (M0 | PIN_OUTPUT)}, /* gpmc_oen_ren.gpmc_oen_ren */
{GPMC_WEN, (M0 | PIN_OUTPUT)}, /* gpmc_wen.gpmc_wen */
{GPMC_BEN0, (M0 | PIN_OUTPUT)}, /* gpmc_ben0.gpmc_ben0 */
{GPMC_BEN1, (M0 | PIN_OUTPUT)}, /* gpmc_ben1.gpmc_ben1 */
{GPMC_WAIT0, (M0 | PIN_INPUT_PULLUP | SLEWCONTROL)}, /* gpmc_wait0.gpmc_wait0 */
{VIN2A_VSYNC0, (M14 | PIN_INPUT_PULLUP)}, /* vin2a_vsync0.gpio4_0 */
{VIN2A_D0, (M11 | PIN_INPUT)}, /* vin2a_d0.pr1_uart0_rxd */
{VIN2A_D1, (M11 | PIN_OUTPUT)}, /* vin2a_d1.pr1_uart0_txd */
{VIN2A_D4, (M14 | PIN_INPUT_PULLUP)}, /* vin2a_d4.gpio4_5 */
{VIN2A_D5, (M14 | PIN_INPUT_PULLUP)}, /* vin2a_d5.gpio4_6 */
{VIN2A_D6, (M14 | PIN_INPUT_PULLUP)}, /* vin2a_d6.gpio4_7 */
{VIN2A_D7, (M14 | PIN_INPUT_PULLUP)}, /* vin2a_d7.gpio4_8 */
{VIN2A_D8, (M14 | PIN_OUTPUT_PULLUP)}, /* vin2a_d8.gpio4_9 */
{VIN2A_D9, (M14 | PIN_OUTPUT_PULLUP)}, /* vin2a_d9.gpio4_10 */
{VIN2A_D10, (M3 | PIN_OUTPUT)}, /* vin2a_d10.mdio_mclk */
{VIN2A_D11, (M3 | PIN_INPUT)}, /* vin2a_d11.mdio_d */
{VIN2A_D12, (M14 | PIN_OUTPUT_PULLUP)}, /* vin2a_d12.gpio4_13 */
{VIN2A_D13, (M14 | PIN_OUTPUT_PULLUP)}, /* vin2a_d13.gpio4_14 */
{VIN2A_D14, (M14 | PIN_INPUT_PULLUP)}, /* vin2a_d14.gpio4_15 */
{VIN2A_D15, (M14 | PIN_INPUT_PULLUP)}, /* vin2a_d15.gpio4_16 */
{VIN2A_D16, (M14 | PIN_INPUT_PULLUP)}, /* vin2a_d16.gpio4_24 */
{VIN2A_D17, (M14 | PIN_INPUT_PULLUP)}, /* vin2a_d17.gpio4_25 */
{VIN2A_D18, (M14 | PIN_INPUT_PULLUP)}, /* vin2a_d18.gpio4_26 */
{VIN2A_D19, (M14 | PIN_INPUT_PULLUP)}, /* vin2a_d19.gpio4_27 */
{VIN2A_D20, (M14 | PIN_INPUT_PULLUP)}, /* vin2a_d20.gpio4_28 */
{VIN2A_D21, (M14 | PIN_INPUT_PULLUP)}, /* vin2a_d21.gpio4_29 */
{VIN2A_D22, (M14 | PIN_INPUT_PULLUP)}, /* vin2a_d22.gpio4_30 */
{VIN2A_D23, (M14 | PIN_INPUT_PULLUP)}, /* vin2a_d23.gpio4_31 */
{MDIO_MCLK, (M3 | PIN_INPUT | SLEWCONTROL)}, /* mdio_mclk.mii0_col */
{MDIO_D, (M3 | PIN_OUTPUT | SLEWCONTROL)}, /* mdio_d.mii0_txer */
{RMII_MHZ_50_CLK, (M14 | PIN_INPUT_PULLUP)}, /* RMII_MHZ_50_CLK.gpio5_17 */
{UART3_RXD, (M3 | PIN_INPUT | SLEWCONTROL)}, /* uart3_rxd.mii0_rxdv */
{UART3_TXD, (M3 | PIN_INPUT | SLEWCONTROL)}, /* uart3_txd.mii0_rxclk */
{RGMII0_TXC, (M3 | PIN_INPUT)}, /* rgmii0_txc.mii0_rxd3 */
{RGMII0_TXCTL, (M3 | PIN_INPUT)}, /* rgmii0_txctl.mii0_rxd2 */
{RGMII0_TXD3, (M3 | PIN_INPUT)}, /* rgmii0_txd3.mii0_crs */
{RGMII0_TXD2, (M3 | PIN_INPUT)}, /* rgmii0_txd2.mii0_rxer */
{RGMII0_TXD1, (M3 | PIN_INPUT)}, /* rgmii0_txd1.mii0_rxd1 */
{RGMII0_TXD0, (M3 | PIN_INPUT)}, /* rgmii0_txd0.mii0_rxd0 */
{RGMII0_RXC, (M3 | PIN_INPUT)}, /* rgmii0_rxc.mii0_txclk */
{RGMII0_RXCTL, (M3 | PIN_OUTPUT)}, /* rgmii0_rxctl.mii0_txd3 */
{RGMII0_RXD3, (M3 | PIN_OUTPUT)}, /* rgmii0_rxd3.mii0_txd2 */
{RGMII0_RXD2, (M3 | PIN_OUTPUT)}, /* rgmii0_rxd2.mii0_txen */
{RGMII0_RXD1, (M3 | PIN_OUTPUT)}, /* rgmii0_rxd1.mii0_txd1 */
{RGMII0_RXD0, (M3 | PIN_OUTPUT)}, /* rgmii0_rxd0.mii0_txd0 */
{GPIO6_14, (M3 | PIN_INPUT)}, /* gpio6_14.uart10_rxd */
{GPIO6_15, (M3 | PIN_OUTPUT)}, /* gpio6_15.uart10_txd */
{XREF_CLK0, (M11 | PIN_INPUT)}, /* xref_clk0.pr2_mii1_col */
{XREF_CLK1, (M11 | PIN_INPUT)}, /* xref_clk1.pr2_mii1_crs */
{MCASP1_ACLKX, (M11 | PIN_OUTPUT)}, /* mcasp1_aclkx.pr2_mdio_mdclk */
{MCASP1_FSX, (M11 | PIN_INPUT | SLEWCONTROL)}, /* mcasp1_fsx.pr2_mdio_data */
{MCASP1_ACLKR, (M14 | PIN_INPUT_PULLUP)}, /* mcasp1_aclkr.gpio5_0 */
{MCASP1_FSR, (M14 | PIN_INPUT_PULLUP)}, /* mcasp1_fsr.gpio5_1 */
{MCASP1_AXR0, (M11 | PIN_INPUT | SLEWCONTROL)}, /* mcasp1_axr0.pr2_mii0_rxer */
{MCASP1_AXR1, (M11 | PIN_INPUT | SLEWCONTROL)}, /* mcasp1_axr1.pr2_mii_mt0_clk */
{MCASP1_AXR2, (M14 | PIN_INPUT_PULLUP)}, /* mcasp1_axr2.gpio5_4 */
{MCASP1_AXR3, (M14 | PIN_INPUT_PULLUP)}, /* mcasp1_axr3.gpio5_5 */
{MCASP1_AXR4, (M14 | PIN_INPUT_PULLUP)}, /* mcasp1_axr4.gpio5_6 */
{MCASP1_AXR5, (M14 | PIN_INPUT_PULLUP)}, /* mcasp1_axr5.gpio5_7 */
{MCASP1_AXR6, (M14 | PIN_INPUT_PULLUP)}, /* mcasp1_axr6.gpio5_8 */
{MCASP1_AXR7, (M14 | PIN_INPUT_PULLUP)}, /* mcasp1_axr7.gpio5_9 */
{MCASP1_AXR8, (M11 | PIN_OUTPUT | SLEWCONTROL)}, /* mcasp1_axr8.pr2_mii0_txen */
{MCASP1_AXR9, (M11 | PIN_OUTPUT | SLEWCONTROL)}, /* mcasp1_axr9.pr2_mii0_txd3 */
{MCASP1_AXR10, (M11 | PIN_OUTPUT | SLEWCONTROL)}, /* mcasp1_axr10.pr2_mii0_txd2 */
{MCASP1_AXR11, (M11 | PIN_OUTPUT | SLEWCONTROL)}, /* mcasp1_axr11.pr2_mii0_txd1 */
{MCASP1_AXR12, (M11 | PIN_OUTPUT | SLEWCONTROL)}, /* mcasp1_axr12.pr2_mii0_txd0 */
{MCASP1_AXR13, (M11 | PIN_INPUT | SLEWCONTROL)}, /* mcasp1_axr13.pr2_mii_mr0_clk */
{MCASP1_AXR14, (M11 | PIN_INPUT | SLEWCONTROL)}, /* mcasp1_axr14.pr2_mii0_rxdv */
{MCASP1_AXR15, (M11 | PIN_INPUT | SLEWCONTROL)}, /* mcasp1_axr15.pr2_mii0_rxd3 */
{MCASP2_ACLKX, (M11 | PIN_INPUT)}, /* mcasp2_aclkx.pr2_mii0_rxd2 */
{MCASP2_FSX, (M11 | PIN_INPUT | SLEWCONTROL)}, /* mcasp2_fsx.pr2_mii0_rxd1 */
{MCASP2_AXR2, (M11 | PIN_INPUT | SLEWCONTROL)}, /* mcasp2_axr2.pr2_mii0_rxd0 */
{MCASP2_AXR4, (M14 | PIN_INPUT_PULLUP)}, /* mcasp2_axr4.gpio1_4 */
{MCASP2_AXR7, (M14 | PIN_INPUT_PULLUP)}, /* mcasp2_axr7.gpio1_5 */
{MCASP3_ACLKX, (M11 | PIN_INPUT)}, /* mcasp3_aclkx.pr2_mii0_crs */
{MCASP3_FSX, (M11 | PIN_INPUT | SLEWCONTROL)}, /* mcasp3_fsx.pr2_mii0_col */
{MCASP3_AXR0, (M11 | PIN_INPUT | SLEWCONTROL)}, /* mcasp3_axr0.pr2_mii1_rxer */
{MCASP5_AXR0, (M4 | PIN_INPUT)}, /* mcasp5_axr0.uart3_rxd */
{MCASP5_AXR1, (M4 | PIN_OUTPUT)}, /* mcasp5_axr1.uart3_txd */
{MMC1_CLK, (M0 | PIN_INPUT_PULLUP)}, /* mmc1_clk.mmc1_clk */
{MMC1_CMD, (M0 | PIN_INPUT_PULLUP)}, /* mmc1_cmd.mmc1_cmd */
{MMC1_DAT0, (M0 | PIN_INPUT_PULLUP)}, /* mmc1_dat0.mmc1_dat0 */
{MMC1_DAT1, (M0 | PIN_INPUT_PULLUP)}, /* mmc1_dat1.mmc1_dat1 */
{MMC1_DAT2, (M0 | PIN_INPUT_PULLUP)}, /* mmc1_dat2.mmc1_dat2 */
{MMC1_DAT3, (M0 | PIN_INPUT_PULLUP)}, /* mmc1_dat3.mmc1_dat3 */
{MMC1_SDCD, (M0 | PIN_INPUT_PULLUP | SLEWCONTROL)}, /* mmc1_sdcd.mmc1_sdcd */
{MMC1_SDWP, (M0 | PIN_INPUT | SLEWCONTROL)}, /* mmc1_sdwp.mmc1_sdwp */
{GPIO6_10, (M11 | PIN_INPUT)}, /* gpio6_10.pr2_mii_mt1_clk */
{GPIO6_11, (M11 | PIN_OUTPUT)}, /* gpio6_11.pr2_mii1_txen */
{MMC3_CLK, (M11 | PIN_OUTPUT)}, /* mmc3_clk.pr2_mii1_txd3 */
{MMC3_CMD, (M11 | PIN_OUTPUT)}, /* mmc3_cmd.pr2_mii1_txd2 */
{MMC3_DAT0, (M11 | PIN_OUTPUT)}, /* mmc3_dat0.pr2_mii1_txd1 */
{MMC3_DAT1, (M11 | PIN_OUTPUT)}, /* mmc3_dat1.pr2_mii1_txd0 */
{MMC3_DAT2, (M11 | PIN_INPUT)}, /* mmc3_dat2.pr2_mii_mr1_clk */
{MMC3_DAT3, (M11 | PIN_INPUT)}, /* mmc3_dat3.pr2_mii1_rxdv */
{MMC3_DAT4, (M11 | PIN_INPUT)}, /* mmc3_dat4.pr2_mii1_rxd3 */
{MMC3_DAT5, (M11 | PIN_INPUT)}, /* mmc3_dat5.pr2_mii1_rxd2 */
{MMC3_DAT6, (M11 | PIN_INPUT)}, /* mmc3_dat6.pr2_mii1_rxd1 */
{MMC3_DAT7, (M11 | PIN_INPUT)}, /* mmc3_dat7.pr2_mii1_rxd0 */
{SPI1_SCLK, (M0 | PIN_OUTPUT)}, /* spi1_sclk.spi1_sclk */
{SPI1_D1, (M0 | PIN_OUTPUT)}, /* spi1_d1.spi1_d1 */
{SPI1_D0, (M0 | PIN_INPUT)}, /* spi1_d0.spi1_d0 */
{SPI1_CS0, (M0 | PIN_OUTPUT)}, /* spi1_cs0.spi1_cs0 */
{SPI1_CS2, (M4 | PIN_OUTPUT | SLEWCONTROL)}, /* spi1_cs2.dcan2_tx */
{SPI1_CS3, (M15 | PIN_INPUT)}, /* spi1_cs3.dcan2_rx */
{DCAN1_TX, (M14 | PIN_INPUT_PULLUP | SLEWCONTROL)}, /* dcan1_tx.gpio1_14 */
{DCAN1_RX, (M14 | PIN_INPUT_PULLUP | SLEWCONTROL)}, /* dcan1_rx.gpio1_15 */
{UART1_RXD, (M0 | PIN_INPUT | SLEWCONTROL)}, /* uart1_rxd.uart1_rxd */
{UART1_TXD, (M0 | PIN_OUTPUT | SLEWCONTROL)}, /* uart1_txd.uart1_txd */
{UART1_CTSN, (M0 | PIN_INPUT)}, /* uart1_ctsn.uart1_ctsn */
{UART1_RTSN, (M0 | PIN_OUTPUT)}, /* uart1_rtsn.uart1_rtsn */
{UART2_RXD, (M5 | PIN_INPUT)}, /* uart2_rxd.uart1_dcdn */
{UART2_CTSN, (M14 | PIN_INPUT_PULLUP)}, /* uart2_ctsn.gpio1_16 */
{UART2_RTSN, (M14 | PIN_INPUT_PULLUP)}, /* uart2_rtsn.gpio1_17 */
{I2C1_SDA, (M0 | PIN_INPUT)}, /* i2c1_sda.i2c1_sda */
{I2C1_SCL, (M0 | PIN_INPUT)}, /* i2c1_scl.i2c1_scl */
{I2C2_SDA, (M0 | PIN_INPUT)}, /* i2c2_sda.i2c2_sda */
{I2C2_SCL, (M0 | PIN_INPUT)}, /* i2c2_scl.i2c2_scl */
{WAKEUP0, (M14 | PIN_INPUT_PULLUP)}, /* Wakeup0.gpio1_0 */
{WAKEUP3, (M14 | PIN_INPUT_PULLUP)}, /* Wakeup3.gpio1_3 */


Thanks,
Gourav