[PATCH 4/4] ARM: i.MX8MN: pass along correct DT depending on variant
Marco Felsch
m.felsch at pengutronix.de
Wed Jul 6 07:21:05 PDT 2022
From: Ahmad Fatoum <a.fatoum at pengutronix.de>
We support two different i.MX8MN variants of the i.MX8MN-EVK:
One with LPDDR4 and another with DDR4, each with a different PMIC.
The PMICs are at different i2c addresses, which allows us to
differentiate between the variants in PBL, but in barebox proper, we use
the same DT for both. Fix that, so we run with a device tree that
reflects the actual hardware. This allows us to apply the esdctl
quirk selectively too.
Tested on the DDR4 variant (Marco)
Signed-off-by: Ahmad Fatoum <a.fatoum at pengutronix.de>
m.felsch at pengutronix.de: added deep-probe
m.felsch at pengutronix.de: rebased on next
Tested-by: Marco Felsch <m.felsch at pengutronix.de>
Signed-off-by: Marco Felsch <m.felsch at pengutronix.de>
---
arch/arm/boards/nxp-imx8mn-evk/board.c | 21 ++++--
arch/arm/boards/nxp-imx8mn-evk/lowlevel.c | 13 +++-
arch/arm/dts/Makefile | 2 +-
arch/arm/dts/imx8mn-ddr4-evk.dts | 6 ++
arch/arm/dts/imx8mn-evk.dts | 84 +----------------------
arch/arm/dts/imx8mn-evk.dtsi | 83 ++++++++++++++++++++++
6 files changed, 117 insertions(+), 92 deletions(-)
create mode 100644 arch/arm/dts/imx8mn-ddr4-evk.dts
create mode 100644 arch/arm/dts/imx8mn-evk.dtsi
diff --git a/arch/arm/boards/nxp-imx8mn-evk/board.c b/arch/arm/boards/nxp-imx8mn-evk/board.c
index 3c478d5f70..3606dabe9d 100644
--- a/arch/arm/boards/nxp-imx8mn-evk/board.c
+++ b/arch/arm/boards/nxp-imx8mn-evk/board.c
@@ -5,6 +5,7 @@
#include <bootsource.h>
#include <common.h>
+#include <deep-probe.h>
#include <init.h>
#include <linux/phy.h>
#include <linux/sizes.h>
@@ -30,14 +31,11 @@ static int ar8031_phy_fixup(struct phy_device *phydev)
return 0;
}
-static int nxp_imx8mn_evk_init(void)
+static int imx8mn_evk_probe(struct device_d *dev)
{
int emmc_bbu_flag = 0;
int sd_bbu_flag = 0;
- if (!of_machine_is_compatible("fsl,imx8mn-evk"))
- return 0;
-
if (bootsource_get() == BOOTSOURCE_MMC) {
if (bootsource_get_instance() == 2) {
of_device_enable_path("/chosen/environment-emmc");
@@ -59,4 +57,17 @@ static int nxp_imx8mn_evk_init(void)
return 0;
}
-coredevice_initcall(nxp_imx8mn_evk_init);
+
+static const struct of_device_id imx8mn_evk_of_match[] = {
+ { .compatible = "fsl,imx8mn-evk" },
+ { .compatible = "fsl,imx8mn-ddr4-evk" },
+ { /* sentinel */ },
+};
+BAREBOX_DEEP_PROBE_ENABLE(imx8mn_evk_of_match);
+
+static struct driver_d imx8mn_evkboard_driver = {
+ .name = "board-imx8mn-evk",
+ .probe = imx8mn_evk_probe,
+ .of_compatible = DRV_OF_COMPAT(imx8mn_evk_of_match),
+};
+coredevice_platform_driver(imx8mn_evkboard_driver);
diff --git a/arch/arm/boards/nxp-imx8mn-evk/lowlevel.c b/arch/arm/boards/nxp-imx8mn-evk/lowlevel.c
index de53213ebc..7fbe11a897 100644
--- a/arch/arm/boards/nxp-imx8mn-evk/lowlevel.c
+++ b/arch/arm/boards/nxp-imx8mn-evk/lowlevel.c
@@ -22,8 +22,6 @@
#include <mfd/bd71837.h>
#include <soc/imx8m/ddr.h>
-extern char __dtb_z_imx8mn_evk_start[];
-
static void setup_uart(void)
{
void __iomem *uart = IOMEM(MX8M_UART2_BASE_ADDR);
@@ -211,14 +209,23 @@ static void start_atf(void)
*/
static __noreturn noinline void nxp_imx8mn_evk_start(void)
{
+ extern char __dtb_z_imx8mn_evk_start[], __dtb_z_imx8mn_ddr4_evk_start[];
+ void *fdt;
+
setup_uart();
start_atf();
+ /* Check if we configured DDR4 in EL3 */
+ if (readl(MX8M_DDRC_CTL_BASE_ADDR) & BIT(4))
+ fdt = __dtb_z_imx8mn_ddr4_evk_start;
+ else
+ fdt = __dtb_z_imx8mn_evk_start;
+
/*
* Standard entry we hit once we initialized both DDR and ATF
*/
- imx8mn_barebox_entry(__dtb_z_imx8mn_evk_start);
+ imx8mn_barebox_entry(fdt);
}
ENTRY_FUNCTION(start_nxp_imx8mn_evk, r0, r1, r2)
diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index 0c7e43e226..39ea93a077 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -140,7 +140,7 @@ lwl-$(CONFIG_MACH_TECHNEXION_WANDBOARD) += imx6q-wandboard.dtb.o imx6dl-wandboar
lwl-$(CONFIG_MACH_TECHNEXION_PICO_HOBBIT) += imx6ul-pico-hobbit.dtb.o
lwl-$(CONFIG_MACH_NXP_IMX6ULL_EVK) += imx6ull-14x14-evk.dtb.o
lwl-$(CONFIG_MACH_NXP_IMX8MM_EVK) += imx8mm-evk.dtb.o
-lwl-$(CONFIG_MACH_NXP_IMX8MN_EVK) += imx8mn-evk.dtb.o
+lwl-$(CONFIG_MACH_NXP_IMX8MN_EVK) += imx8mn-evk.dtb.o imx8mn-ddr4-evk.dtb.o
lwl-$(CONFIG_MACH_NXP_IMX8MP_EVK) += imx8mp-evk.dtb.o
lwl-$(CONFIG_MACH_NXP_IMX8MQ_EVK) += imx8mq-evk.dtb.o
lwl-$(CONFIG_MACH_TORADEX_COLIBRI_T20) += tegra20-colibri-iris.dtb.o
diff --git a/arch/arm/dts/imx8mn-ddr4-evk.dts b/arch/arm/dts/imx8mn-ddr4-evk.dts
new file mode 100644
index 0000000000..6ebb4d15e4
--- /dev/null
+++ b/arch/arm/dts/imx8mn-ddr4-evk.dts
@@ -0,0 +1,6 @@
+// SPDX-License-Identifier: (GPL-2.0 OR MIT)
+
+/dts-v1/;
+
+#include <arm64/freescale/imx8mn-ddr4-evk.dts>
+#include "imx8mn-evk.dtsi"
diff --git a/arch/arm/dts/imx8mn-evk.dts b/arch/arm/dts/imx8mn-evk.dts
index 8a0e92b299..eb6e1312f4 100644
--- a/arch/arm/dts/imx8mn-evk.dts
+++ b/arch/arm/dts/imx8mn-evk.dts
@@ -1,88 +1,6 @@
// SPDX-License-Identifier: (GPL-2.0 OR MIT)
-/*
- * Copyright 2017 NXP
- * Copyright (C) 2017 Pengutronix, Lucas Stach <kernel at pengutronix.de>
- */
/dts-v1/;
#include <arm64/freescale/imx8mn-evk.dts>
-
-/ {
- chosen {
- environment-sd {
- compatible = "barebox,environment";
- device-path = &usdhc2, "partname:barebox-environment";
- status = "disabled";
- };
- environment-emmc {
- compatible = "barebox,environment";
- device-path = &usdhc3, "partname:barebox-environment";
- status = "disabled";
- };
- };
-};
-
-&usdhc2 {
- #address-cells = <1>;
- #size-cells = <1>;
-
- partition at 0 {
- label = "barebox";
- reg = <0x0 0xe0000>;
- };
-
- partition at e0000 {
- label = "barebox-environment";
- reg = <0xe0000 0x20000>;
- };
-};
-
-&usdhc3 {
- #address-cells = <1>;
- #size-cells = <1>;
-
- partition at 0 {
- label = "barebox";
- reg = <0x0 0xe0000>;
- };
-
- partition at e0000 {
- label = "barebox-environment";
- reg = <0xe0000 0x20000>;
- };
-};
-
-&ocotp {
- barebox,provide-mac-address = <&fec1 0x640>;
-};
-
-&iomuxc {
- pinctrl_flexspi0: flexspi0grp {
- fsl,pins = <
- MX8MN_IOMUXC_NAND_ALE_QSPI_A_SCLK 0x1c4
- MX8MN_IOMUXC_NAND_CE0_B_QSPI_A_SS0_B 0x84
- MX8MN_IOMUXC_NAND_DATA00_QSPI_A_DATA0 0x84
- MX8MN_IOMUXC_NAND_DATA01_QSPI_A_DATA1 0x84
- MX8MN_IOMUXC_NAND_DATA02_QSPI_A_DATA2 0x84
- MX8MN_IOMUXC_NAND_DATA03_QSPI_A_DATA3 0x84
- >;
- };
-};
-
-&flexspi {
- status = "okay";
- pinctrl-names = "default";
- pinctrl-0 = <&pinctrl_flexspi0>;
-
- system_flash: flash at 0 {
- reg = <0>;
- compatible = "jedec,spi-nor";
- spi-max-frequency = <80000000>;
- spi-tx-bus-width = <4>;
- spi-rx-bus-width = <4>;
- #address-cells = <1>;
- #size-cells = <1>;
- };
-};
-
+#include "imx8mn-evk.dtsi"
diff --git a/arch/arm/dts/imx8mn-evk.dtsi b/arch/arm/dts/imx8mn-evk.dtsi
new file mode 100644
index 0000000000..ceeb5f8b93
--- /dev/null
+++ b/arch/arm/dts/imx8mn-evk.dtsi
@@ -0,0 +1,83 @@
+// SPDX-License-Identifier: (GPL-2.0 OR MIT)
+/*
+ * Copyright 2017 NXP
+ * Copyright (C) 2017 Pengutronix, Lucas Stach <kernel at pengutronix.de>
+ */
+
+/ {
+ chosen {
+ environment-sd {
+ compatible = "barebox,environment";
+ device-path = &usdhc2, "partname:barebox-environment";
+ status = "disabled";
+ };
+ environment-emmc {
+ compatible = "barebox,environment";
+ device-path = &usdhc3, "partname:barebox-environment";
+ status = "disabled";
+ };
+ };
+};
+
+&usdhc2 {
+ #address-cells = <1>;
+ #size-cells = <1>;
+
+ partition at 0 {
+ label = "barebox";
+ reg = <0x0 0xe0000>;
+ };
+
+ partition at e0000 {
+ label = "barebox-environment";
+ reg = <0xe0000 0x20000>;
+ };
+};
+
+&usdhc3 {
+ #address-cells = <1>;
+ #size-cells = <1>;
+
+ partition at 0 {
+ label = "barebox";
+ reg = <0x0 0xe0000>;
+ };
+
+ partition at e0000 {
+ label = "barebox-environment";
+ reg = <0xe0000 0x20000>;
+ };
+};
+
+&ocotp {
+ barebox,provide-mac-address = <&fec1 0x640>;
+};
+
+&iomuxc {
+ pinctrl_flexspi0: flexspi0grp {
+ fsl,pins = <
+ MX8MN_IOMUXC_NAND_ALE_QSPI_A_SCLK 0x1c4
+ MX8MN_IOMUXC_NAND_CE0_B_QSPI_A_SS0_B 0x84
+ MX8MN_IOMUXC_NAND_DATA00_QSPI_A_DATA0 0x84
+ MX8MN_IOMUXC_NAND_DATA01_QSPI_A_DATA1 0x84
+ MX8MN_IOMUXC_NAND_DATA02_QSPI_A_DATA2 0x84
+ MX8MN_IOMUXC_NAND_DATA03_QSPI_A_DATA3 0x84
+ >;
+ };
+};
+
+&flexspi {
+ status = "okay";
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_flexspi0>;
+
+ system_flash: flash at 0 {
+ reg = <0>;
+ compatible = "jedec,spi-nor";
+ spi-max-frequency = <80000000>;
+ spi-tx-bus-width = <4>;
+ spi-rx-bus-width = <4>;
+ #address-cells = <1>;
+ #size-cells = <1>;
+ };
+};
--
2.30.2
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