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ARM: dts: rza2mevb: Upstream Linux requires SDRAM 

As upstream Linux does not support XIP (eXecute-In-Place) for ARMv7-A
platforms that are part of the ARCH_MULTIPLATFORM framework, it cannot
run in the 8 MiB of HyperRAM present on the RZ/A2M CPU board.  Hence the
64 MiB of SDRAM on the sub-board needs to be enabled, which has the
following ramifications:
  - SCIF4 connected to the on-board USB-serial can no longer be used as
    the serial console,
  - Instead, SCIF2 is used as the serial console, by connecting a 3.3V
    TTL USB-to-Serial adapter to the CMOS camera connector,
  - The first Ethernet channel can no longer be used,
  - USB Channel 1 loses the overcurrent input signal.

Based on the Linux-4.19 BSP for RZ/A2.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Chris Brandt <chris.brandt@renesas.com>
Link: https://lore.kernel.org/r/20210304094945.4003097-1-geert+renesas@glider.be
This commit is contained in:
Geert Uytterhoeven 2021-03-04 10:49:45 +01:00
Родитель b1158c5e14
Коммит a4be49e75a
1 изменённых файлов: 32 добавлений и 23 удалений
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55
arch/arm/boot/dts/r7s9210-rza2mevb.dts
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@ -4,6 +4,28 @@
*
* Copyright (C) 2018 Renesas Electronics
*
* As upstream Linux does not support XIP, it cannot run in 8 MiB of HyperRAM.
* Hence the 64 MiB of SDRAM on the sub-board needs to be enabled, which has
* the following ramifications:
* - SCIF4 connected to the on-board USB-serial can no longer be used as the
* serial console,
* - Instead, SCIF2 is used as the serial console, by connecting a 3.3V TTL
* USB-to-Serial adapter to the CMOS camera connector:
* - RXD = CN17-9,
* - TXD = CN17-10,
* - GND = CN17-2 or CN17-17,
* - The first Ethernet channel can no longer be used,
* - USB Channel 1 loses the overcurrent input signal.
*
* Please make sure your sub-board matches the following switch settings:
*
* SW6 SW6-1 set to SDRAM
* ON SW6-2 set to Audio
* +---------------------+ SW6-3 set to DRP
* | = = = = = | SW6-4 set to CEU
* | = = | SW6-5 set to Ether2
* | 1 2 3 4 5 6 7 8 9 0 | SW6-6 set to VDC6
* +---------------------+ SW6-7 set to VDC6
*/
/dts-v1/;
@ -17,9 +39,8 @@
compatible = "renesas,rza2mevb", "renesas,r7s9210";
aliases {
serial0 = &scif4;
ethernet0 = &ether0;
ethernet1 = &ether1;
serial0 = &scif2;
ethernet0 = &ether1;
};
chosen {
@ -58,9 +79,9 @@
};
};
memory@40000000 {
memory@c000000 {
device_type = "memory";
reg = <0x40000000 0x00800000>; /* HyperRAM */
reg = <0x0c000000 0x04000000>; /* SDRAM */
};
};
@ -72,17 +93,6 @@
status = "okay";
};
&ether0 {
pinctrl-names = "default";
pinctrl-0 = <&eth0_pins>;
status = "okay";
renesas,no-ether-link;
phy-handle = <&phy0>;
phy0: ethernet-phy@0 {
reg = <0>;
};
};
&ether1 {
pinctrl-names = "default";
pinctrl-0 = <&eth1_pins>;
@ -142,9 +152,9 @@
};
/* Serial Console */
scif4_pins: serial4 {
pinmux = <RZA2_PINMUX(PORT9, 0, 4)>, /* TxD4 */
<RZA2_PINMUX(PORT9, 1, 4)>; /* RxD4 */
scif2_pins: serial2 {
pinmux = <RZA2_PINMUX(PORTE, 2, 3)>, /* TxD2 */
<RZA2_PINMUX(PORTE, 1, 3)>; /* RxD2 */
};
sdhi0_pins: sdhi0 {
@ -165,8 +175,7 @@
usb1_pins: usb1 {
pinmux = <RZA2_PINMUX(PORTC, 0, 1)>, /* VBUSIN1 */
<RZA2_PINMUX(PORTC, 5, 1)>, /* VBUSEN1 */
<RZA2_PINMUX(PORT7, 5, 5)>; /* OVRCUR1 */
<RZA2_PINMUX(PORTC, 5, 1)>; /* VBUSEN1 */
};
};
@ -176,9 +185,9 @@
};
/* Serial Console */
&scif4 {
&scif2 {
pinctrl-names = "default";
pinctrl-0 = <&scif4_pins>;
pinctrl-0 = <&scif2_pins>;
status = "okay";
};