arm: mvebu: Use dw-apb-uart instead of ns16650 as UART driver
The UART controller used in the Armada 370 and Armada XP SoCs is the Synopsys DesignWare 8250 (aka Synopsys DesignWare ABP UART). The improper use of the ns16550 can lead to a kernel oops during boot if a character is sent to the UART before the initialization of the driver. The DW APB has an extra interrupt that gets raised when writing to the LCR when busy. This explains why we need to use dw-apb-uart driver to handle this. Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com> Signed-off-by: Jason Cooper <jason@lakedaemon.net>
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@ -50,17 +50,19 @@
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ranges;
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serial@d0012000 {
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compatible = "ns16550";
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compatible = "snps,dw-apb-uart";
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reg = <0xd0012000 0x100>;
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reg-shift = <2>;
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interrupts = <41>;
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reg-io-width = <4>;
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status = "disabled";
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};
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serial@d0012100 {
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compatible = "ns16550";
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compatible = "snps,dw-apb-uart";
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reg = <0xd0012100 0x100>;
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reg-shift = <2>;
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interrupts = <42>;
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reg-io-width = <4>;
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status = "disabled";
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};
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@ -42,17 +42,19 @@
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soc {
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serial@d0012200 {
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compatible = "ns16550";
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compatible = "snps,dw-apb-uart";
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reg = <0xd0012200 0x100>;
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reg-shift = <2>;
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interrupts = <43>;
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reg-io-width = <4>;
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status = "disabled";
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};
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serial@d0012300 {
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compatible = "ns16550";
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compatible = "snps,dw-apb-uart";
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reg = <0xd0012300 0x100>;
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reg-shift = <2>;
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interrupts = <44>;
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reg-io-width = <4>;
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status = "disabled";
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};
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@ -33,9 +33,7 @@ CONFIG_MVNETA=y
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CONFIG_MARVELL_PHY=y
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CONFIG_SERIAL_8250=y
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CONFIG_SERIAL_8250_CONSOLE=y
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CONFIG_SERIAL_OF_PLATFORM=y
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CONFIG_I2C=y
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CONFIG_I2C_MV64XXX=y
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CONFIG_SERIAL_8250_DW=y
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CONFIG_GPIOLIB=y
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CONFIG_GPIO_SYSFS=y
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# CONFIG_USB_SUPPORT is not set
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