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author | John Wang <wangzhiqiang.bj@bytedance.com> | 2020-09-30 08:08:32 +0300 |
---|---|---|
committer | Andrew Geissler <geissonator@yahoo.com> | 2020-12-31 19:41:05 +0300 |
commit | 493f858a181c09cd6fb5b7b3d07c7fd0549f01e4 (patch) | |
tree | 93fbe9bace2c4f194d07b6333780f066fbc589d3 /meta-bytedance/meta-g220a/recipes-kernel/linux/linux-aspeed | |
parent | 7b12eb3ffd6596895ca1c9e70b43a8908bc57827 (diff) | |
download | openbmc-493f858a181c09cd6fb5b7b3d07c7fd0549f01e4.tar.xz |
bytedance: g220a: Add uart routing patch
(From meta-bytedance rev: 5729e59f3a7f1202deccb8d90738a32f8821c215)
Signed-off-by: John Wang <wangzhiqiang.bj@bytedance.com>
Change-Id: I115935112219927a9ac77720adeae646a62aec12
Signed-off-by: Andrew Geissler <geissonator@yahoo.com>
Diffstat (limited to 'meta-bytedance/meta-g220a/recipes-kernel/linux/linux-aspeed')
3 files changed, 594 insertions, 0 deletions
diff --git a/meta-bytedance/meta-g220a/recipes-kernel/linux/linux-aspeed/0003-misc-aspeed-Add-Aspeed-UART-routing-control-driver.patch b/meta-bytedance/meta-g220a/recipes-kernel/linux/linux-aspeed/0003-misc-aspeed-Add-Aspeed-UART-routing-control-driver.patch new file mode 100644 index 0000000000..7076ede200 --- /dev/null +++ b/meta-bytedance/meta-g220a/recipes-kernel/linux/linux-aspeed/0003-misc-aspeed-Add-Aspeed-UART-routing-control-driver.patch @@ -0,0 +1,521 @@ +From dc37d698586a7ca4e4381ef7726249fa70d14c89 Mon Sep 17 00:00:00 2001 +From: Oskar Senft <osk@google.com> +Date: Wed, 8 Aug 2018 10:15:05 -0400 +Subject: [PATCH 3/5] misc: aspeed: Add Aspeed UART routing control driver. + +This driver adds sysfs files that allow the BMC userspace to configure +how UARTs and physical serial I/O ports are routed. + +Tested: Checked correct behavior (both read & write) on TYAN S7106 +board by manually changing routing settings and confirming that bits +flow as expected. Tested for UART1 and UART3 as this board doesn't have +the other UARTs wired up in a testable way. + +Signed-off-by: Oskar Senft <osk@google.com> +Signed-off-by: Yong Li <yong.b.li@linux.intel.com> +Signed-off-by: Vernon Mauery <vernon.mauery@linux.intel.com> +Signed-off-by: John Wang <wangzhiqiang.bj@bytedance.com> +--- + .../stable/sysfs-driver-aspeed-uart-routing | 14 + + .../misc-devices/aspeed-uart-routing.txt | 49 +++ + drivers/misc/Kconfig | 6 + + drivers/misc/Makefile | 1 + + drivers/misc/aspeed-uart-routing.c | 383 ++++++++++++++++++ + 5 files changed, 453 insertions(+) + create mode 100644 Documentation/ABI/stable/sysfs-driver-aspeed-uart-routing + create mode 100644 Documentation/misc-devices/aspeed-uart-routing.txt + create mode 100644 drivers/misc/aspeed-uart-routing.c + +diff --git a/Documentation/ABI/stable/sysfs-driver-aspeed-uart-routing b/Documentation/ABI/stable/sysfs-driver-aspeed-uart-routing +new file mode 100644 +index 000000000000..5068737d9c12 +--- /dev/null ++++ b/Documentation/ABI/stable/sysfs-driver-aspeed-uart-routing +@@ -0,0 +1,14 @@ ++What: /sys/bus/platform/drivers/aspeed-uart-routing/*/io* ++Date: August 2018 ++Contact: Oskar Senft <osk@google.com> ++Description: Configures the input source for the specific physical ++ serial I/O port. ++Users: OpenBMC. Proposed changes should be mailed to ++ openbmc@lists.ozlabs.org ++ ++What: /sys/bus/platform/drivers/aspeed-uart-routing/*/uart* ++Date: August 2018 ++Contact: Oskar Senft <osk@google.com> ++Description: Configures the input source for the specific UART. ++Users: OpenBMC. Proposed changes should be mailed to ++ openbmc@lists.ozlabs.org +diff --git a/Documentation/misc-devices/aspeed-uart-routing.txt b/Documentation/misc-devices/aspeed-uart-routing.txt +new file mode 100644 +index 000000000000..cf1c2a466875 +--- /dev/null ++++ b/Documentation/misc-devices/aspeed-uart-routing.txt +@@ -0,0 +1,49 @@ ++Kernel driver aspeed-uart-routing ++================================= ++ ++Supported chips: ++ASPEED AST2500/AST2600 ++ ++Author: ++Google LLC ++ ++Description ++----------- ++ ++The Aspeed AST2500/AST2600 allows to dynamically route the inputs for the ++built-in UARTS and physical serial I/O ports. ++ ++This allows, for example, to connect the output of UART to another UART. ++This can be used to enable host<->BMC communication via UARTs, e.g. to allow ++access to the host's serial console. ++ ++This driver is for the BMC side. The sysfs files allow the BMC userspace ++which owns the system configuration policy, to configure how UARTs and ++physical serial I/O ports are routed. ++ ++The driver provides the following files in sysfs: ++uart1 Configure the input signal to UART1. ++uart2 Configure the input signal to UART2. ++uart3 Configure the input signal to UART3. ++uart4 Configure the input signal to UART4. ++uart5 Configure the input signal to UART5. ++io1 Configure the input signal to physical serial port 1. ++io2 Configure the input signal to physical serial port 2. ++io3 Configure the input signal to physical serial port 3. ++io4 Configure the input signal to physical serial port 4. ++io5 Configure the input signal to physical serial port 5. ++ ++When read, each file shows the list of available options with the currently ++selected option marked by square brackets "[]". The list of available options ++depends on the selected file. ++ ++Example: ++$ cat /sys/bus/platform/drivers/aspeed-uart-routing/*.uart_routing/uart1 ++[io1] io2 io3 io4 uart2 uart3 uart4 io6 ++ ++In this case, UART1 gets its input signal from IO1 (physical serial port 1). ++ ++$ echo -n "uart3" \ ++ >/sys/bus/platform/drivers/aspeed-uart-routing/*.uart_routing/uart1 ++$ cat /sys/bus/platform/drivers/aspeed-uart-routing/*.uart_routing/uart1 ++io1 io2 io3 io4 uart2 [uart3] uart4 io6 +diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig +index d8626a0d3e31..48a519c59bdf 100644 +--- a/drivers/misc/Kconfig ++++ b/drivers/misc/Kconfig +@@ -451,6 +451,12 @@ config MCTP_LPC + Implements the MCTP LPC binding via KCS LPC IO cycles for control and + LPC FWH cycles for data + ++config ASPEED_UART_ROUTING ++ tristate "Aspeed ast2500 UART routing control" ++ help ++ If you want to configure UART routing on Aspeed BMC platforms, enable ++ this option. ++ + config MISC_RTSX + tristate + default MISC_RTSX_PCI || MISC_RTSX_USB +diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile +index 183970192ced..4e67e21c2e65 100644 +--- a/drivers/misc/Makefile ++++ b/drivers/misc/Makefile +@@ -60,3 +60,4 @@ obj-$(CONFIG_XILINX_SDFEC) += xilinx_sdfec.o + obj-$(CONFIG_NPCM7XX_LPC_BPC) += npcm7xx-lpc-bpc.o + obj-$(CONFIG_NPCM7XX_PCI_MBOX) += npcm7xx-pci-mbox.o + obj-$(CONFIG_MCTP_LPC) += mctp-lpc.o ++obj-$(CONFIG_ASPEED_UART_ROUTING) += aspeed-uart-routing.o +diff --git a/drivers/misc/aspeed-uart-routing.c b/drivers/misc/aspeed-uart-routing.c +new file mode 100644 +index 000000000000..21ef5d98c317 +--- /dev/null ++++ b/drivers/misc/aspeed-uart-routing.c +@@ -0,0 +1,383 @@ ++/* ++ * UART Routing driver for Aspeed AST2500 ++ * ++ * Copyright (c) 2018 Google LLC ++ * ++ * This program is free software; you can redistribute it and/or ++ * modify it under the terms of the GNU General Public License ++ * version 2 as published by the Free Software Foundation. ++ * ++ * This program is distributed in the hope that it will be useful, ++ * but WITHOUT ANY WARRANTY; without even the implied warranty of ++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ++ * GNU General Public License for more details. ++ */ ++#include <linux/device.h> ++#include <linux/module.h> ++#include <linux/of_address.h> ++#include <linux/of_platform.h> ++ ++/* The Aspeed AST2500 allows to dynamically route the inputs for the built-in ++ * UARTS and physical serial I/O ports. ++ * ++ * This allows, for example, to connect the output of UART to another UART. ++ * This can be used to enable host<->BMC communication via UARTs, e.g. to allow ++ * access to the host's serial console. ++ * ++ * This driver is for the BMC side. The sysfs files allow the BMC userspace ++ * which owns the system configuration policy, to configure how UARTs and ++ * physical serial I/O ports are routed. ++ */ ++ ++#define ASPEED_HICRA_IO1 "io1" ++#define ASPEED_HICRA_IO2 "io2" ++#define ASPEED_HICRA_IO3 "io3" ++#define ASPEED_HICRA_IO4 "io4" ++#define ASPEED_HICRA_IO5 "io5" ++#define ASPEED_HICRA_IO6 "io6" ++#define ASPEED_HICRA_UART1 "uart1" ++#define ASPEED_HICRA_UART2 "uart2" ++#define ASPEED_HICRA_UART3 "uart3" ++#define ASPEED_HICRA_UART4 "uart4" ++#define ASPEED_HICRA_UART5 "uart5" ++ ++struct aspeed_uart_routing { ++ struct device *dev; ++ void __iomem *regs; ++ spinlock_t lock; ++}; ++ ++struct aspeed_uart_routing_selector { ++ struct device_attribute dev_attr; ++ int shift; ++ int mask; ++ const char * const options[]; ++}; ++ ++#define to_routing_selector(_dev_attr) \ ++ container_of(_dev_attr, struct aspeed_uart_routing_selector, dev_attr) ++ ++ ++static ssize_t aspeed_uart_routing_show(struct device *dev, ++ struct device_attribute *attr, ++ char *buf); ++ ++static ssize_t aspeed_uart_routing_store(struct device *dev, ++ struct device_attribute *attr, ++ const char *buf, size_t count); ++ ++#define ROUTING_ATTR(_name) { \ ++ .attr = {.name = _name, \ ++ .mode = VERIFY_OCTAL_PERMISSIONS(S_IWUSR | S_IRUGO) }, \ ++ .show = aspeed_uart_routing_show, \ ++ .store = aspeed_uart_routing_store, \ ++} ++ ++static struct aspeed_uart_routing_selector uart5_sel = { ++ .dev_attr = ROUTING_ATTR(ASPEED_HICRA_UART5), ++ .shift = 28, ++ .mask = 0xf, ++ .options = { ++ ASPEED_HICRA_IO5, // 0 ++ ASPEED_HICRA_IO1, // 1 ++ ASPEED_HICRA_IO2, // 2 ++ ASPEED_HICRA_IO3, // 3 ++ ASPEED_HICRA_IO4, // 4 ++ ASPEED_HICRA_UART1, // 5 ++ ASPEED_HICRA_UART2, // 6 ++ ASPEED_HICRA_UART3, // 7 ++ ASPEED_HICRA_UART4, // 8 ++ ASPEED_HICRA_IO6, // 9 ++ NULL, // NULL termination ++ }, ++}; ++ ++static struct aspeed_uart_routing_selector uart4_sel = { ++ .dev_attr = ROUTING_ATTR(ASPEED_HICRA_UART4), ++ .shift = 25, ++ .mask = 0x7, ++ .options = { ++ ASPEED_HICRA_IO4, // 0 ++ ASPEED_HICRA_IO1, // 1 ++ ASPEED_HICRA_IO2, // 2 ++ ASPEED_HICRA_IO3, // 3 ++ ASPEED_HICRA_UART1, // 4 ++ ASPEED_HICRA_UART2, // 5 ++ ASPEED_HICRA_UART3, // 6 ++ ASPEED_HICRA_IO6, // 7 ++ NULL, // NULL termination ++ }, ++}; ++ ++static struct aspeed_uart_routing_selector uart3_sel = { ++ .dev_attr = ROUTING_ATTR(ASPEED_HICRA_UART3), ++ .shift = 22, ++ .mask = 0x7, ++ .options = { ++ ASPEED_HICRA_IO3, // 0 ++ ASPEED_HICRA_IO4, // 1 ++ ASPEED_HICRA_IO1, // 2 ++ ASPEED_HICRA_IO2, // 3 ++ ASPEED_HICRA_UART4, // 4 ++ ASPEED_HICRA_UART1, // 5 ++ ASPEED_HICRA_UART2, // 6 ++ ASPEED_HICRA_IO6, // 7 ++ NULL, // NULL termination ++ }, ++}; ++ ++static struct aspeed_uart_routing_selector uart2_sel = { ++ .dev_attr = ROUTING_ATTR(ASPEED_HICRA_UART2), ++ .shift = 19, ++ .mask = 0x7, ++ .options = { ++ ASPEED_HICRA_IO2, // 0 ++ ASPEED_HICRA_IO3, // 1 ++ ASPEED_HICRA_IO4, // 2 ++ ASPEED_HICRA_IO1, // 3 ++ ASPEED_HICRA_UART3, // 4 ++ ASPEED_HICRA_UART4, // 5 ++ ASPEED_HICRA_UART1, // 6 ++ ASPEED_HICRA_IO6, // 7 ++ NULL, // NULL termination ++ }, ++}; ++ ++static struct aspeed_uart_routing_selector uart1_sel = { ++ .dev_attr = ROUTING_ATTR(ASPEED_HICRA_UART1), ++ .shift = 16, ++ .mask = 0x7, ++ .options = { ++ ASPEED_HICRA_IO1, // 0 ++ ASPEED_HICRA_IO2, // 1 ++ ASPEED_HICRA_IO3, // 2 ++ ASPEED_HICRA_IO4, // 3 ++ ASPEED_HICRA_UART2, // 4 ++ ASPEED_HICRA_UART3, // 5 ++ ASPEED_HICRA_UART4, // 6 ++ ASPEED_HICRA_IO6, // 7 ++ NULL, // NULL termination ++ }, ++}; ++ ++static struct aspeed_uart_routing_selector io5_sel = { ++ .dev_attr = ROUTING_ATTR(ASPEED_HICRA_IO5), ++ .shift = 12, ++ .mask = 0x7, ++ .options = { ++ ASPEED_HICRA_UART5, // 0 ++ ASPEED_HICRA_UART1, // 1 ++ ASPEED_HICRA_UART2, // 2 ++ ASPEED_HICRA_UART3, // 3 ++ ASPEED_HICRA_UART4, // 4 ++ ASPEED_HICRA_IO1, // 5 ++ ASPEED_HICRA_IO3, // 6 ++ ASPEED_HICRA_IO6, // 7 ++ NULL, // NULL termination ++ }, ++}; ++ ++static struct aspeed_uart_routing_selector io4_sel = { ++ .dev_attr = ROUTING_ATTR(ASPEED_HICRA_IO4), ++ .shift = 9, ++ .mask = 0x7, ++ .options = { ++ ASPEED_HICRA_UART4, // 0 ++ ASPEED_HICRA_UART5, // 1 ++ ASPEED_HICRA_UART1, // 2 ++ ASPEED_HICRA_UART2, // 3 ++ ASPEED_HICRA_UART3, // 4 ++ ASPEED_HICRA_IO1, // 5 ++ ASPEED_HICRA_IO2, // 6 ++ ASPEED_HICRA_IO6, // 7 ++ NULL, // NULL termination ++ }, ++}; ++ ++static struct aspeed_uart_routing_selector io3_sel = { ++ .dev_attr = ROUTING_ATTR(ASPEED_HICRA_IO3), ++ .shift = 6, ++ .mask = 0x7, ++ .options = { ++ ASPEED_HICRA_UART3, // 0 ++ ASPEED_HICRA_UART4, // 1 ++ ASPEED_HICRA_UART5, // 2 ++ ASPEED_HICRA_UART1, // 3 ++ ASPEED_HICRA_UART2, // 4 ++ ASPEED_HICRA_IO1, // 5 ++ ASPEED_HICRA_IO2, // 6 ++ ASPEED_HICRA_IO6, // 7 ++ NULL, // NULL termination ++ }, ++}; ++ ++static struct aspeed_uart_routing_selector io2_sel = { ++ .dev_attr = ROUTING_ATTR(ASPEED_HICRA_IO2), ++ .shift = 3, ++ .mask = 0x7, ++ .options = { ++ ASPEED_HICRA_UART2, // 0 ++ ASPEED_HICRA_UART3, // 1 ++ ASPEED_HICRA_UART4, // 2 ++ ASPEED_HICRA_UART5, // 3 ++ ASPEED_HICRA_UART1, // 4 ++ ASPEED_HICRA_IO3, // 5 ++ ASPEED_HICRA_IO4, // 6 ++ ASPEED_HICRA_IO6, // 7 ++ NULL, // NULL termination ++ }, ++}; ++ ++static struct aspeed_uart_routing_selector io1_sel = { ++ .dev_attr = ROUTING_ATTR(ASPEED_HICRA_IO1), ++ .shift = 0, ++ .mask = 0x7, ++ .options = { ++ ASPEED_HICRA_UART1, // 0 ++ ASPEED_HICRA_UART2, // 1 ++ ASPEED_HICRA_UART3, // 2 ++ ASPEED_HICRA_UART4, // 3 ++ ASPEED_HICRA_UART5, // 4 ++ ASPEED_HICRA_IO3, // 5 ++ ASPEED_HICRA_IO4, // 6 ++ ASPEED_HICRA_IO6, // 7 ++ NULL, // NULL termination ++ }, ++}; ++ ++ ++static struct attribute *aspeed_uart_routing_attrs[] = { ++ &uart1_sel.dev_attr.attr, ++ &uart2_sel.dev_attr.attr, ++ &uart3_sel.dev_attr.attr, ++ &uart4_sel.dev_attr.attr, ++ &uart5_sel.dev_attr.attr, ++ &io1_sel.dev_attr.attr, ++ &io2_sel.dev_attr.attr, ++ &io3_sel.dev_attr.attr, ++ &io4_sel.dev_attr.attr, ++ &io5_sel.dev_attr.attr, ++ NULL, ++}; ++ ++static const struct attribute_group aspeed_uart_routing_attr_group = { ++ .attrs = aspeed_uart_routing_attrs, ++}; ++ ++static ssize_t aspeed_uart_routing_show(struct device *dev, ++ struct device_attribute *attr, ++ char *buf) ++{ ++ struct aspeed_uart_routing *uart_routing = dev_get_drvdata(dev); ++ struct aspeed_uart_routing_selector *sel = to_routing_selector(attr); ++ int val, pos, len; ++ ++ val = (readl(uart_routing->regs) >> sel->shift) & sel->mask; ++ ++ len = 0; ++ for (pos = 0; sel->options[pos] != NULL; ++pos) { ++ if (pos == val) { ++ len += snprintf(buf + len, PAGE_SIZE - 1 - len, ++ "[%s] ", sel->options[pos]); ++ } else { ++ len += snprintf(buf + len, PAGE_SIZE - 1 - len, ++ "%s ", sel->options[pos]); ++ } ++ } ++ ++ if (val >= pos) { ++ len += snprintf(buf + len, PAGE_SIZE - 1 - len, ++ "[unknown(%d)]", val); ++ } ++ ++ len += snprintf(buf + len, PAGE_SIZE - 1 - len, "\n"); ++ ++ return len; ++} ++ ++static ssize_t aspeed_uart_routing_store(struct device *dev, ++ struct device_attribute *attr, ++ const char *buf, size_t count) ++{ ++ struct aspeed_uart_routing *uart_routing = dev_get_drvdata(dev); ++ struct aspeed_uart_routing_selector *sel = to_routing_selector(attr); ++ int val; ++ u32 reg; ++ ++ val = match_string(sel->options, -1, buf); ++ if (val < 0) { ++ dev_err(dev, "invalid value \"%s\"\n", buf); ++ return -EINVAL; ++ } ++ ++ spin_lock(&uart_routing->lock); ++ reg = readl(uart_routing->regs); ++ // Zero out existing value in specified bits. ++ reg &= ~(sel->mask << sel->shift); ++ // Set new value in specified bits. ++ reg |= (val & sel->mask) << sel->shift; ++ writel(reg, uart_routing->regs); ++ spin_unlock(&uart_routing->lock); ++ ++ return count; ++} ++ ++static int aspeed_uart_routing_probe(struct platform_device *pdev) ++{ ++ struct aspeed_uart_routing *uart_routing; ++ struct resource *res; ++ int rc; ++ ++ uart_routing = devm_kzalloc(&pdev->dev, ++ sizeof(*uart_routing), ++ GFP_KERNEL); ++ if (!uart_routing) ++ return -ENOMEM; ++ ++ spin_lock_init(&uart_routing->lock); ++ uart_routing->dev = &pdev->dev; ++ ++ res = platform_get_resource(pdev, IORESOURCE_MEM, 0); ++ uart_routing->regs = devm_ioremap_resource(&pdev->dev, res); ++ if (IS_ERR(uart_routing->regs)) ++ return PTR_ERR(uart_routing->regs); ++ ++ rc = sysfs_create_group(&uart_routing->dev->kobj, ++ &aspeed_uart_routing_attr_group); ++ if (rc < 0) ++ return rc; ++ ++ platform_set_drvdata(pdev, uart_routing); ++ ++ return 0; ++} ++ ++static int aspeed_uart_routing_remove(struct platform_device *pdev) ++{ ++ struct aspeed_uart_routing *uart_routing = platform_get_drvdata(pdev); ++ ++ sysfs_remove_group(&uart_routing->dev->kobj, ++ &aspeed_uart_routing_attr_group); ++ ++ return 0; ++} ++ ++static const struct of_device_id aspeed_uart_routing_table[] = { ++ { .compatible = "aspeed,ast2500-uart-routing" }, ++ { }, ++}; ++ ++static struct platform_driver aspeed_uart_routing_driver = { ++ .driver = { ++ .name = "aspeed-uart-routing", ++ .of_match_table = aspeed_uart_routing_table, ++ }, ++ .probe = aspeed_uart_routing_probe, ++ .remove = aspeed_uart_routing_remove, ++}; ++ ++module_platform_driver(aspeed_uart_routing_driver); ++ ++MODULE_AUTHOR("Oskar Senft <osk@google.com>"); ++MODULE_LICENSE("GPL v2"); ++MODULE_DESCRIPTION("Driver to configure Aspeed UART routing"); +-- +2.25.1 + diff --git a/meta-bytedance/meta-g220a/recipes-kernel/linux/linux-aspeed/0004-ARM-dts-aspeed-Add-uart-routing-node.patch b/meta-bytedance/meta-g220a/recipes-kernel/linux/linux-aspeed/0004-ARM-dts-aspeed-Add-uart-routing-node.patch new file mode 100644 index 0000000000..645a093856 --- /dev/null +++ b/meta-bytedance/meta-g220a/recipes-kernel/linux/linux-aspeed/0004-ARM-dts-aspeed-Add-uart-routing-node.patch @@ -0,0 +1,48 @@ +From c12fc8a0f748358f76ff5a883a390301f86f079f Mon Sep 17 00:00:00 2001 +From: John Wang <wangzhiqiang.bj@bytedance.com> +Date: Wed, 30 Sep 2020 12:41:30 +0800 +Subject: [PATCH 4/5] ARM: dts: aspeed: Add uart-routing node + +Signed-off-by: John Wang <wangzhiqiang.bj@bytedance.com> +--- + arch/arm/boot/dts/aspeed-g5.dtsi | 6 ++++++ + arch/arm/boot/dts/aspeed-g6.dtsi | 6 ++++++ + 2 files changed, 12 insertions(+) + +diff --git a/arch/arm/boot/dts/aspeed-g5.dtsi b/arch/arm/boot/dts/aspeed-g5.dtsi +index 19288495f41a..de9a8fd3933f 100644 +--- a/arch/arm/boot/dts/aspeed-g5.dtsi ++++ b/arch/arm/boot/dts/aspeed-g5.dtsi +@@ -522,6 +522,12 @@ sio_regs: regs { + compatible = "aspeed,bmc-misc"; + }; + }; ++ ++ uart_routing: uart_routing@9c { ++ compatible = "aspeed,ast2500-uart-routing"; ++ reg = <0x9c 0x4>; ++ status = "disabled"; ++ }; + }; + + peci: bus@1e78b000 { +diff --git a/arch/arm/boot/dts/aspeed-g6.dtsi b/arch/arm/boot/dts/aspeed-g6.dtsi +index 97ca743363d7..9938b8f224f6 100644 +--- a/arch/arm/boot/dts/aspeed-g6.dtsi ++++ b/arch/arm/boot/dts/aspeed-g6.dtsi +@@ -311,6 +311,12 @@ pinctrl: pinctrl { + compatible = "aspeed,ast2600-pinctrl"; + }; + ++ uart_routing: uart_routing@9c { ++ compatible = "aspeed,ast2500-uart-routing"; ++ reg = <0x9c 0x4>; ++ status = "disabled"; ++ }; ++ + smp-memram@180 { + compatible = "aspeed,ast2600-smpmem"; + reg = <0x180 0x40>; +-- +2.25.1 + diff --git a/meta-bytedance/meta-g220a/recipes-kernel/linux/linux-aspeed/0005-ARM-dts-aspeed-Enable-g220a-uart-route.patch b/meta-bytedance/meta-g220a/recipes-kernel/linux/linux-aspeed/0005-ARM-dts-aspeed-Enable-g220a-uart-route.patch new file mode 100644 index 0000000000..fb26499b51 --- /dev/null +++ b/meta-bytedance/meta-g220a/recipes-kernel/linux/linux-aspeed/0005-ARM-dts-aspeed-Enable-g220a-uart-route.patch @@ -0,0 +1,25 @@ +From 6901c1fb9c8fbf33461811b9f1667bcaf876b747 Mon Sep 17 00:00:00 2001 +From: John Wang <wangzhiqiang.bj@bytedance.com> +Date: Wed, 30 Sep 2020 13:02:22 +0800 +Subject: [PATCH 5/5] ARM: dts: aspeed: Enable g220a uart route + +Signed-off-by: John Wang <wangzhiqiang.bj@bytedance.com> +--- + arch/arm/boot/dts/aspeed-bmc-bytedance-g220a.dts | 4 ++++ + 1 file changed, 4 insertions(+) + +diff --git a/arch/arm/boot/dts/aspeed-bmc-bytedance-g220a.dts b/arch/arm/boot/dts/aspeed-bmc-bytedance-g220a.dts +index 2ae2684c115c..c18ca23f57ac 100644 +--- a/arch/arm/boot/dts/aspeed-bmc-bytedance-g220a.dts ++++ b/arch/arm/boot/dts/aspeed-bmc-bytedance-g220a.dts +@@ -929,3 +929,7 @@ &video { + &vhub { + status = "okay"; + }; ++ ++&uart_routing { ++ status = "okay"; ++}; +-- +2.25.1 + |