[PATCH 07/17] MIPS: loongson32: Convert UART platform device to DT
From: Keguang Zhang
Date: Sat Jul 29 2023 - 09:44:39 EST
Add UART device nodes for Loongson-1 boards,
and drop the legacy platform devices and data accordingly.
Signed-off-by: Keguang Zhang <keguang.zhang@xxxxxxxxx>
---
arch/mips/boot/dts/loongson/loongson1.dtsi | 54 +++++++++++++++++++
arch/mips/boot/dts/loongson/loongson1b.dtsi | 12 +++++
arch/mips/boot/dts/loongson/loongson1c.dtsi | 12 +++++
arch/mips/boot/dts/loongson/lsgz_1b_dev.dts | 20 +++++++
arch/mips/boot/dts/loongson/smartloong_1c.dts | 20 +++++++
arch/mips/loongson32/common/platform.c | 44 ---------------
arch/mips/loongson32/ls1b/board.c | 3 --
arch/mips/loongson32/ls1c/board.c | 3 --
8 files changed, 118 insertions(+), 50 deletions(-)
diff --git a/arch/mips/boot/dts/loongson/loongson1.dtsi b/arch/mips/boot/dts/loongson/loongson1.dtsi
index 711c88fd2781..c77aa2d0f66c 100644
--- a/arch/mips/boot/dts/loongson/loongson1.dtsi
+++ b/arch/mips/boot/dts/loongson/loongson1.dtsi
@@ -72,4 +72,58 @@ intc3: interrupt-controller@1fd01088 {
interrupts = <5>;
};
};
+
+ apb: bus@1fe40000 {
+ compatible = "simple-bus";
+ reg = <0x1fe40000 0x40000>;
+ ranges;
+
+ #address-cells = <1>;
+ #size-cells = <1>;
+
+ uart0: serial@1fe40000 {
+ compatible = "ns16550a";
+ reg = <0x1fe40000 0x8>;
+
+ interrupt-parent = <&intc0>;
+ interrupts = <2 IRQ_TYPE_LEVEL_HIGH>;
+
+ clocks = <&clkc LS1X_CLKID_APB>;
+
+ status = "disabled";
+ };
+
+ uart1: serial@1fe44000 {
+ compatible = "ns16550a";
+ reg = <0x1fe44000 0x8>;
+
+ interrupt-parent = <&intc0>;
+
+ clocks = <&clkc LS1X_CLKID_APB>;
+
+ status = "disabled";
+ };
+
+ uart2: serial@1fe48000 {
+ compatible = "ns16550a";
+ reg = <0x1fe48000 0x8>;
+
+ interrupt-parent = <&intc0>;
+
+ clocks = <&clkc LS1X_CLKID_APB>;
+
+ status = "disabled";
+ };
+
+ uart3: serial@1fe4c000 {
+ compatible = "ns16550a";
+ reg = <0x1fe4c000 0x8>;
+
+ interrupt-parent = <&intc0>;
+
+ clocks = <&clkc LS1X_CLKID_APB>;
+
+ status = "disabled";
+ };
+ };
};
diff --git a/arch/mips/boot/dts/loongson/loongson1b.dtsi b/arch/mips/boot/dts/loongson/loongson1b.dtsi
index 784ae9b6572d..437a77cee163 100644
--- a/arch/mips/boot/dts/loongson/loongson1b.dtsi
+++ b/arch/mips/boot/dts/loongson/loongson1b.dtsi
@@ -73,3 +73,15 @@ clkc: clock-controller@1fe78030 {
#clock-cells = <1>;
};
};
+
+&uart1 {
+ interrupts = <3 IRQ_TYPE_LEVEL_HIGH>;
+};
+
+&uart2 {
+ interrupts = <4 IRQ_TYPE_LEVEL_HIGH>;
+};
+
+&uart3 {
+ interrupts = <5 IRQ_TYPE_LEVEL_HIGH>;
+};
diff --git a/arch/mips/boot/dts/loongson/loongson1c.dtsi b/arch/mips/boot/dts/loongson/loongson1c.dtsi
index 8570c4c72677..1dd575b7b2f9 100644
--- a/arch/mips/boot/dts/loongson/loongson1c.dtsi
+++ b/arch/mips/boot/dts/loongson/loongson1c.dtsi
@@ -40,3 +40,15 @@ intc4: interrupt-controller@1fd010a0 {
interrupts = <6>;
};
};
+
+&uart1 {
+ interrupts = <4 IRQ_TYPE_LEVEL_HIGH>;
+};
+
+&uart2 {
+ interrupts = <5 IRQ_TYPE_LEVEL_HIGH>;
+};
+
+&uart3 {
+ interrupts = <29 IRQ_TYPE_LEVEL_HIGH>;
+};
diff --git a/arch/mips/boot/dts/loongson/lsgz_1b_dev.dts b/arch/mips/boot/dts/loongson/lsgz_1b_dev.dts
index d12c723b0a2b..89c3dfa574f7 100644
--- a/arch/mips/boot/dts/loongson/lsgz_1b_dev.dts
+++ b/arch/mips/boot/dts/loongson/lsgz_1b_dev.dts
@@ -11,6 +11,10 @@ / {
compatible = "loongson,lsgz-1b-dev", "loongson,ls1b";
model = "LSGZ_1B_DEV Board";
+ chosen {
+ bootargs = "console=ttyS2,115200";
+ };
+
memory@0 {
device_type = "memory";
reg = <0x0 0x4000000>;
@@ -23,3 +27,19 @@ xtal: xtal {
#clock-cells = <0>;
};
};
+
+&uart0 {
+ status = "okay";
+};
+
+&uart1 {
+ status = "okay";
+};
+
+&uart2 {
+ status = "okay";
+};
+
+&uart3 {
+ status = "okay";
+};
diff --git a/arch/mips/boot/dts/loongson/smartloong_1c.dts b/arch/mips/boot/dts/loongson/smartloong_1c.dts
index 64e869acfd86..188aab9e3685 100644
--- a/arch/mips/boot/dts/loongson/smartloong_1c.dts
+++ b/arch/mips/boot/dts/loongson/smartloong_1c.dts
@@ -11,6 +11,10 @@ / {
compatible = "loongmasses,smartloong-1c", "loongson,ls1c";
model = "Smartloong_1C Board";
+ chosen {
+ bootargs = "console=ttyS2,115200";
+ };
+
memory@0 {
device_type = "memory";
reg = <0x0 0x2000000>;
@@ -23,3 +27,19 @@ xtal: xtal {
#clock-cells = <0>;
};
};
+
+&uart0 {
+ status = "okay";
+};
+
+&uart1 {
+ status = "okay";
+};
+
+&uart2 {
+ status = "okay";
+};
+
+&uart3 {
+ status = "okay";
+};
diff --git a/arch/mips/loongson32/common/platform.c b/arch/mips/loongson32/common/platform.c
index 8075590a9f83..8272b4133e25 100644
--- a/arch/mips/loongson32/common/platform.c
+++ b/arch/mips/loongson32/common/platform.c
@@ -9,7 +9,6 @@
#include <linux/mtd/partitions.h>
#include <linux/sizes.h>
#include <linux/phy.h>
-#include <linux/serial_8250.h>
#include <linux/stmmac.h>
#include <linux/usb/ehci_pdriver.h>
@@ -18,49 +17,6 @@
#include <dma.h>
#include <nand.h>
-/* 8250/16550 compatible UART */
-#define LS1X_UART(_id) \
- { \
- .mapbase = LS1X_UART ## _id ## _BASE, \
- .irq = LS1X_UART ## _id ## _IRQ, \
- .iotype = UPIO_MEM, \
- .flags = UPF_IOREMAP | UPF_FIXED_TYPE, \
- .type = PORT_16550A, \
- }
-
-static struct plat_serial8250_port ls1x_serial8250_pdata[] = {
- LS1X_UART(0),
- LS1X_UART(1),
- LS1X_UART(2),
- LS1X_UART(3),
- {},
-};
-
-struct platform_device ls1x_uart_pdev = {
- .name = "serial8250",
- .id = PLAT8250_DEV_PLATFORM,
- .dev = {
- .platform_data = ls1x_serial8250_pdata,
- },
-};
-
-void __init ls1x_serial_set_uartclk(struct platform_device *pdev)
-{
- struct clk *clk;
- struct plat_serial8250_port *p;
-
- clk = clk_get(&pdev->dev, pdev->name);
- if (IS_ERR(clk)) {
- pr_err("unable to get %s clock, err=%ld",
- pdev->name, PTR_ERR(clk));
- return;
- }
- clk_prepare_enable(clk);
-
- for (p = pdev->dev.platform_data; p->flags != 0; ++p)
- p->uartclk = clk_get_rate(clk);
-}
-
/* Synopsys Ethernet GMAC */
static struct stmmac_mdio_bus_data ls1x_mdio_bus_data = {
.phy_mask = 0,
diff --git a/arch/mips/loongson32/ls1b/board.c b/arch/mips/loongson32/ls1b/board.c
index fed8d432ef20..e8290f200096 100644
--- a/arch/mips/loongson32/ls1b/board.c
+++ b/arch/mips/loongson32/ls1b/board.c
@@ -34,7 +34,6 @@ static const struct gpio_led_platform_data ls1x_led_pdata __initconst = {
};
static struct platform_device *ls1b_platform_devices[] __initdata = {
- &ls1x_uart_pdev,
&ls1x_eth0_pdev,
&ls1x_eth1_pdev,
&ls1x_ehci_pdev,
@@ -46,8 +45,6 @@ static struct platform_device *ls1b_platform_devices[] __initdata = {
static int __init ls1b_platform_init(void)
{
- ls1x_serial_set_uartclk(&ls1x_uart_pdev);
-
gpio_led_register_device(-1, &ls1x_led_pdata);
return platform_add_devices(ls1b_platform_devices,
diff --git a/arch/mips/loongson32/ls1c/board.c b/arch/mips/loongson32/ls1c/board.c
index 9dcfe9de55b0..a7096964fb30 100644
--- a/arch/mips/loongson32/ls1c/board.c
+++ b/arch/mips/loongson32/ls1c/board.c
@@ -6,7 +6,6 @@
#include <platform.h>
static struct platform_device *ls1c_platform_devices[] __initdata = {
- &ls1x_uart_pdev,
&ls1x_eth0_pdev,
&ls1x_rtc_pdev,
&ls1x_wdt_pdev,
@@ -14,8 +13,6 @@ static struct platform_device *ls1c_platform_devices[] __initdata = {
static int __init ls1c_platform_init(void)
{
- ls1x_serial_set_uartclk(&ls1x_uart_pdev);
-
return platform_add_devices(ls1c_platform_devices,
ARRAY_SIZE(ls1c_platform_devices));
}
--
2.39.2