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Message-Id: <20240622-am62lp-sk-nand-v1-2-caee496eaf42@kernel.org>
Date: Sat, 22 Jun 2024 14:59:57 +0300
From: Roger Quadros <rogerq@...nel.org>
To: Nishanth Menon <nm@...com>, Vignesh Raghavendra <vigneshr@...com>,
Tero Kristo <kristo@...nel.org>, Rob Herring <robh@...nel.org>,
Krzysztof Kozlowski <krzk+dt@...nel.org>,
Conor Dooley <conor+dt@...nel.org>
Cc: srk@...com, praneeth@...com, linux-arm-kernel@...ts.infradead.org,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
Roger Quadros <rogerq@...nel.org>
Subject: [PATCH 2/2] arm64: dts: ti: am62-lp-sk: Add overlay for NAND
expansion card
The NAND expansion card (PROC143E1) connects over the User/MCU/PRU
Expansion port on the am62-lp-sk EVM.
The following pins are shared between McASP1 and GPMC-NAND so
both cannot work simultaneously.
Pin name McASP1 function GPMC function
======== =============== =============
J17 MCASP1_AXR0 GPMC0_WEN
P21 MCASP1_AFSX GPMC0_WAIT0
K17 MCASP1_ACLKX GPMC0_BE0N_CLE
K20 MCASP1_AXR2 GPMC0_ADVN_ALE
The factory default sets the pins for McASP1 use. (i.e.
Resistor Array RA1 installed, RA4 not installed).
For NAND use, RA1 has to be removed and RA4 must be
installed.
Signed-off-by: Roger Quadros <rogerq@...nel.org>
---
arch/arm64/boot/dts/ti/Makefile | 1 +
arch/arm64/boot/dts/ti/k3-am62-lp-sk-nand.dtso | 116 +++++++++++++++++++++++++
arch/arm64/boot/dts/ti/k3-am62-lp-sk.dts | 4 +
3 files changed, 121 insertions(+)
diff --git a/arch/arm64/boot/dts/ti/Makefile b/arch/arm64/boot/dts/ti/Makefile
index 1e6fcd1ff7ba..7fcbf14ae439 100644
--- a/arch/arm64/boot/dts/ti/Makefile
+++ b/arch/arm64/boot/dts/ti/Makefile
@@ -25,6 +25,7 @@ dtb-$(CONFIG_ARCH_K3) += k3-am625-verdin-wifi-yavia.dtb
dtb-$(CONFIG_ARCH_K3) += k3-am625-phyboard-lyra-1-4-ghz-opp.dtbo
dtb-$(CONFIG_ARCH_K3) += k3-am62x-phyboard-lyra-gpio-fan.dtbo
dtb-$(CONFIG_ARCH_K3) += k3-am62-lp-sk.dtb
+dtb-$(CONFIG_ARCH_K3) += k3-am62-lp-sk-nand.dtbo
# Boards with AM62Ax SoC
dtb-$(CONFIG_ARCH_K3) += k3-am62a7-sk.dtb
diff --git a/arch/arm64/boot/dts/ti/k3-am62-lp-sk-nand.dtso b/arch/arm64/boot/dts/ti/k3-am62-lp-sk-nand.dtso
new file mode 100644
index 000000000000..173ac60723b6
--- /dev/null
+++ b/arch/arm64/boot/dts/ti/k3-am62-lp-sk-nand.dtso
@@ -0,0 +1,116 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2022-2024 Texas Instruments Incorporated - https://www.ti.com/
+ */
+
+/dts-v1/;
+/plugin/;
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/interrupt-controller/irq.h>
+#include "k3-pinctrl.h"
+
+&mcasp1 {
+ status = "disabled";
+};
+
+&main_pmx0 {
+ gpmc0_pins_default: gpmc0-pins-default {
+ pinctrl-single,pins = <
+ AM62X_IOPAD(0x003c, PIN_INPUT, 0) /* (K19) GPMC0_AD0 */
+ AM62X_IOPAD(0x0040, PIN_INPUT, 0) /* (L19) GPMC0_AD1 */
+ AM62X_IOPAD(0x0044, PIN_INPUT, 0) /* (L20) GPMC0_AD2 */
+ AM62X_IOPAD(0x0048, PIN_INPUT, 0) /* (L21) GPMC0_AD3 */
+ AM62X_IOPAD(0x004c, PIN_INPUT, 0) /* (M21) GPMC0_AD4 */
+ AM62X_IOPAD(0x0050, PIN_INPUT, 0) /* (L17) GPMC0_AD5 */
+ AM62X_IOPAD(0x0054, PIN_INPUT, 0) /* (L18) GPMC0_AD6 */
+ AM62X_IOPAD(0x0058, PIN_INPUT, 0) /* (M20) GPMC0_AD7 */
+ AM62X_IOPAD(0x0098, PIN_INPUT, 0) /* (P21) GPMC0_WAIT0 */
+ AM62X_IOPAD(0x00a8, PIN_OUTPUT, 0) /* (J18) GPMC0_CSn0 */
+ AM62X_IOPAD(0x0084, PIN_OUTPUT, 0) /* (K20) GPMC0_ADVn_ALE */
+ AM62X_IOPAD(0x0088, PIN_OUTPUT, 0) /* (K21) GPMC0_OEn_REn */
+ AM62X_IOPAD(0x008c, PIN_OUTPUT, 0) /* (J17) GPMC0_WEn */
+ AM62X_IOPAD(0x0090, PIN_OUTPUT, 0) /* (K17) GPMC0_BE0n_CLE */
+ AM62X_IOPAD(0x00a0, PIN_OUTPUT, 0) /* (J20) GPMC0_WPn */
+ >;
+ };
+};
+
+&elm0 {
+ status = "okay";
+};
+
+&gpmc0 {
+ status = "okay";
+ pinctrl-names = "default";
+ pinctrl-0 = <&gpmc0_pins_default>;
+ #address-cells = <2>;
+ #size-cells = <1>;
+
+ nand@0,0 {
+ compatible = "ti,am64-nand";
+ reg = <0 0 64>; /* device IO registers */
+ interrupt-parent = <&gpmc0>;
+ interrupts = <0 IRQ_TYPE_NONE>, /* fifoevent */
+ <1 IRQ_TYPE_NONE>; /* termcount */
+ rb-gpios = <&gpmc0 0 GPIO_ACTIVE_HIGH>; /* gpmc_wait0 */
+ ti,nand-xfer-type = "prefetch-polled";
+ ti,nand-ecc-opt = "bch8"; /* BCH8: Bootrom limitation */
+ ti,elm-id = <&elm0>;
+ nand-bus-width = <8>;
+ gpmc,device-width = <1>;
+ gpmc,sync-clk-ps = <0>;
+ gpmc,cs-on-ns = <0>;
+ gpmc,cs-rd-off-ns = <40>;
+ gpmc,cs-wr-off-ns = <40>;
+ gpmc,adv-on-ns = <0>;
+ gpmc,adv-rd-off-ns = <25>;
+ gpmc,adv-wr-off-ns = <25>;
+ gpmc,we-on-ns = <0>;
+ gpmc,we-off-ns = <20>;
+ gpmc,oe-on-ns = <3>;
+ gpmc,oe-off-ns = <30>;
+ gpmc,access-ns = <30>;
+ gpmc,rd-cycle-ns = <40>;
+ gpmc,wr-cycle-ns = <40>;
+ gpmc,bus-turnaround-ns = <0>;
+ gpmc,cycle2cycle-delay-ns = <0>;
+ gpmc,clk-activation-ns = <0>;
+ gpmc,wr-access-ns = <40>;
+ gpmc,wr-data-mux-bus-ns = <0>;
+
+ partitions {
+ compatible = "fixed-partitions";
+ #address-cells = <1>;
+ #size-cells = <1>;
+
+ partition@0 {
+ label = "NAND.tiboot3";
+ reg = <0x00000000 0x00200000>; /* 2M */
+ };
+ partition@...000 {
+ label = "NAND.tispl";
+ reg = <0x00200000 0x00200000>; /* 2M */
+ };
+ partition@...000 {
+ label = "NAND.tiboot3.backup"; /* 2M */
+ reg = <0x00400000 0x00200000>; /* BootROM looks at 4M */
+ };
+ partition@...000 {
+ label = "NAND.u-boot";
+ reg = <0x00600000 0x00400000>; /* 4M */
+ };
+ partition@...000 {
+ label = "NAND.u-boot-env";
+ reg = <0x00a00000 0x00040000>; /* 256K */
+ };
+ partition@...000 {
+ label = "NAND.u-boot-env.backup";
+ reg = <0x00a40000 0x00040000>; /* 256K */
+ };
+ partition@...000 {
+ label = "NAND.file-system";
+ reg = <0x00a80000 0x3f580000>;
+ };
+ };
+ };
+};
diff --git a/arch/arm64/boot/dts/ti/k3-am62-lp-sk.dts b/arch/arm64/boot/dts/ti/k3-am62-lp-sk.dts
index 9a17bd3e59c9..8e9fc00a6b3c 100644
--- a/arch/arm64/boot/dts/ti/k3-am62-lp-sk.dts
+++ b/arch/arm64/boot/dts/ti/k3-am62-lp-sk.dts
@@ -228,3 +228,7 @@ ldo4_reg: ldo4 {
&tlv320aic3106 {
DVDD-supply = <&buck2_reg>;
};
+
+&gpmc0 {
+ ranges = <0 0 0x00 0x51000000 0x01000000>; /* CS0 space. Min partition = 16MB */
+};
--
2.34.1
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