linux-kernel - Re: [PATCH] MIPS: mt7620: Rename uartlite to serial

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Date:   Wed, 6 Sep 2017 09:52:32 +0200
From:   John Crispin <john@...ozen.org>
To:     Harvey Hunt <harvey.hunt@...tec.com>, robh+dt@...nel.org,
        mark.rutland@....com, ralf@...ux-mips.org
Cc:     matt.redfearn@...tec.com, devicetree@...r.kernel.org,
        linux-mips@...ux-mips.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] MIPS: mt7620: Rename uartlite to serial

Hi,


comments inline


On 01/09/17 16:53, Harvey Hunt wrote:
> Previously, mt7620.c defined the clocks for uarts with the names
> uartlite, uart1 and uart2. Rename them to serial{0,1,2} and update
> the devicetree node names.
>
> Signed-off-by: Harvey Hunt <harvey.hunt@...tec.com>
> Cc: devicetree@...r.kernel.org
> Cc: linux-mips@...ux-mips.org
> Cc: linux-kernel@...r.kernel.org
> ---
>   arch/mips/boot/dts/ralink/mt7620a.dtsi |  2 +-
>   arch/mips/boot/dts/ralink/mt7628a.dtsi |  6 +++---
>   arch/mips/ralink/mt7620.c              | 14 +++++++-------
>   3 files changed, 11 insertions(+), 11 deletions(-)
>
> diff --git a/arch/mips/boot/dts/ralink/mt7620a.dtsi b/arch/mips/boot/dts/ralink/mt7620a.dtsi
> index 793c0c7..58bd002 100644
> --- a/arch/mips/boot/dts/ralink/mt7620a.dtsi
> +++ b/arch/mips/boot/dts/ralink/mt7620a.dtsi
> @@ -45,7 +45,7 @@
>   			reg = <0x300 0x100>;
>   		};
>   
> -		uartlite@c00 {
> +		serial0@c00 {
the uartlite is indeed not a full uart, having only rx/tx lines and 
missing various other features. i would prefer to keep it as is. you 
cannot connect a modem to the port for example as that would require HW 
handshake for example. Also making these changes will break 
compatibility with existing devicetrees.

     John

>   			compatible = "ralink,mt7620a-uart", "ralink,rt2880-uart", "ns16550a";
>   			reg = <0xc00 0x100>;
>   
> diff --git a/arch/mips/boot/dts/ralink/mt7628a.dtsi b/arch/mips/boot/dts/ralink/mt7628a.dtsi
> index 9ff7e8f..fe3fe9a 100644
> --- a/arch/mips/boot/dts/ralink/mt7628a.dtsi
> +++ b/arch/mips/boot/dts/ralink/mt7628a.dtsi
> @@ -62,7 +62,7 @@
>   			reg = <0x300 0x100>;
>   		};
>   
> -		uart0: uartlite@c00 {
> +		uart0: serial0@c00 {
>   			compatible = "ns16550a";
>   			reg = <0xc00 0x100>;
>   
> @@ -75,7 +75,7 @@
>   			reg-shift = <2>;
>   		};
>   
> -		uart1: uart1@d00 {
> +		uart1: serial1@d00 {
>   			compatible = "ns16550a";
>   			reg = <0xd00 0x100>;
>   
> @@ -88,7 +88,7 @@
>   			reg-shift = <2>;
>   		};
>   
> -		uart2: uart2@e00 {
> +		uart2: serial2@e00 {
>   			compatible = "ns16550a";
>   			reg = <0xe00 0x100>;
>   
> diff --git a/arch/mips/ralink/mt7620.c b/arch/mips/ralink/mt7620.c
> index 9be8b08..f623ceb 100644
> --- a/arch/mips/ralink/mt7620.c
> +++ b/arch/mips/ralink/mt7620.c
> @@ -54,7 +54,7 @@ static int dram_type;
>   
>   static struct rt2880_pmx_func i2c_grp[] =  { FUNC("i2c", 0, 1, 2) };
>   static struct rt2880_pmx_func spi_grp[] = { FUNC("spi", 0, 3, 4) };
> -static struct rt2880_pmx_func uartlite_grp[] = { FUNC("uartlite", 0, 15, 2) };
> +static struct rt2880_pmx_func serial_grp[] = { FUNC("serial", 0, 15, 2) };
>   static struct rt2880_pmx_func mdio_grp[] = {
>   	FUNC("mdio", MT7620_GPIO_MODE_MDIO, 22, 2),
>   	FUNC("refclk", MT7620_GPIO_MODE_MDIO_REFCLK, 22, 2),
> @@ -92,7 +92,7 @@ static struct rt2880_pmx_group mt7620a_pinmux_data[] = {
>   	GRP("uartf", uartf_grp, MT7620_GPIO_MODE_UART0_MASK,
>   		MT7620_GPIO_MODE_UART0_SHIFT),
>   	GRP("spi", spi_grp, 1, MT7620_GPIO_MODE_SPI),
> -	GRP("uartlite", uartlite_grp, 1, MT7620_GPIO_MODE_UART1),
> +	GRP("serial", serial_grp, 1, MT7620_GPIO_MODE_UART1),
>   	GRP_G("wdt", wdt_grp, MT7620_GPIO_MODE_WDT_MASK,
>   		MT7620_GPIO_MODE_WDT_GPIO, MT7620_GPIO_MODE_WDT_SHIFT),
>   	GRP_G("mdio", mdio_grp, MT7620_GPIO_MODE_MDIO_MASK,
> @@ -530,8 +530,8 @@ void __init ralink_clk_init(void)
>   		periph_rate = MHZ(40);
>   		pcmi2s_rate = MHZ(480);
>   
> -		ralink_clk_add("10000d00.uartlite", periph_rate);
> -		ralink_clk_add("10000e00.uartlite", periph_rate);
> +		ralink_clk_add("10000d00.serial0", periph_rate);
> +		ralink_clk_add("10000e00.serial0", periph_rate);
>   	} else {
>   		cpu_pll_rate = mt7620_get_cpu_pll_rate(xtal_rate);
>   		pll_rate = mt7620_get_pll_rate(xtal_rate, cpu_pll_rate);
> @@ -566,9 +566,9 @@ void __init ralink_clk_init(void)
>   	ralink_clk_add("10000a00.i2s", pcmi2s_rate);
>   	ralink_clk_add("10000b00.spi", sys_rate);
>   	ralink_clk_add("10000b40.spi", sys_rate);
> -	ralink_clk_add("10000c00.uartlite", periph_rate);
> -	ralink_clk_add("10000d00.uart1", periph_rate);
> -	ralink_clk_add("10000e00.uart2", periph_rate);
> +	ralink_clk_add("10000c00.serial0", periph_rate);
> +	ralink_clk_add("10000d00.serial1", periph_rate);
> +	ralink_clk_add("10000e00.serial2", periph_rate);
>   	ralink_clk_add("10180000.wmac", xtal_rate);
>   
>   	if (IS_ENABLED(CONFIG_USB) && !is_mt76x8()) {