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Message-ID: <20250705153825.2be2b333@minigeek.lan>
Date: Sat, 5 Jul 2025 15:38:25 +0100
From: Andre Przywara <andre.przywara@....com>
To: Paul Kocialkowski <paulk@...-base.io>
Cc: netdev@...r.kernel.org, devicetree@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org, linux-sunxi@...ts.linux.dev,
linux-kernel@...r.kernel.org, linux-gpio@...r.kernel.org, Andrew Lunn
<andrew+netdev@...n.ch>, "David S . Miller" <davem@...emloft.net>, Eric
Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, Paolo
Abeni <pabeni@...hat.com>, Rob Herring <robh@...nel.org>, Krzysztof
Kozlowski <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>, Chen-Yu
Tsai <wens@...e.org>, Jernej Skrabec <jernej.skrabec@...il.com>, Samuel
Holland <samuel@...lland.org>, Linus Walleij <linus.walleij@...aro.org>
Subject: Re: [PATCH 1/5] pinctrl: sunxi: Fix a100 emac pin function name
On Fri, 4 Jul 2025 23:35:35 +0100
Andre Przywara <andre.przywara@....com> wrote:
Hi,
> On Thu, 26 Jun 2025 10:09:19 +0200
> Paul Kocialkowski <paulk@...-base.io> wrote:
>
> Hi Paul,
>
> > The Allwinner A100/A133 only has a single emac instance, which is
> > referred to as "emac" everywhere. Fix the pin names to drop the
> > trailing "0" that has no reason to be.
>
> Sorry, but this is wrong. There *is* a second EMAC on the A133 die: it's
> indeed not mentioned in the manual, but you can probe its MMIO
> registers (@0x5030000), and there is a second syscon register
> (@0x03000034). It's mentioned in several BSP code places ([1]).
> It seem like no suitable pins are connected on the A133
> package, but that should not affect the A100 .dtsi (we use a similar
> approach for the H616 and A523).
>
> So I think we should keep the emac0 name.
just thinking that it's even worse: this changes the DT visible pinctrl
function name, so it's a DT ABI change. With the "emac0" function name,
Ethernet would work with stable kernels already (as everything is
compatible, it's just about DT changes). But with this change, pinctrl
drivers in older kernels would not match.
So I would very much like to see this patch moved out. Is it just in
LinusW's tree so far? I don't see it in -next yet.
Cheers,
Andre.
> [1]
> https://github.com/qiaoweibiao/T507_Kernel/blob/main/arch/arm64/boot/dts/sunxi/sun50iw10p1.dtsi
>
>
> >
> > Fixes: 473436e7647d ("pinctrl: sunxi: add support for the Allwinner A100 pin controller")
> > Signed-off-by: Paul Kocialkowski <paulk@...-base.io>
> > ---
> > drivers/pinctrl/sunxi/pinctrl-sun50i-a100.c | 32 ++++++++++-----------
> > 1 file changed, 16 insertions(+), 16 deletions(-)
> >
> > diff --git a/drivers/pinctrl/sunxi/pinctrl-sun50i-a100.c b/drivers/pinctrl/sunxi/pinctrl-sun50i-a100.c
> > index b97de80ae2f3..95b764ee1c0d 100644
> > --- a/drivers/pinctrl/sunxi/pinctrl-sun50i-a100.c
> > +++ b/drivers/pinctrl/sunxi/pinctrl-sun50i-a100.c
> > @@ -546,33 +546,33 @@ static const struct sunxi_desc_pin a100_pins[] = {
> > SUNXI_FUNCTION(0x0, "gpio_in"),
> > SUNXI_FUNCTION(0x1, "gpio_out"),
> > SUNXI_FUNCTION(0x2, "i2c0"), /* SCK */
> > - SUNXI_FUNCTION(0x5, "emac0"), /* RXD1 */
> > + SUNXI_FUNCTION(0x5, "emac"), /* RXD1 */
> > SUNXI_FUNCTION_IRQ_BANK(0x6, 6, 0)),
> > SUNXI_PIN(SUNXI_PINCTRL_PIN(H, 1),
> > SUNXI_FUNCTION(0x0, "gpio_in"),
> > SUNXI_FUNCTION(0x1, "gpio_out"),
> > SUNXI_FUNCTION(0x2, "i2c0"), /* SDA */
> > - SUNXI_FUNCTION(0x5, "emac0"), /* RXD0 */
> > + SUNXI_FUNCTION(0x5, "emac"), /* RXD0 */
> > SUNXI_FUNCTION_IRQ_BANK(0x6, 6, 1)),
> > SUNXI_PIN(SUNXI_PINCTRL_PIN(H, 2),
> > SUNXI_FUNCTION(0x0, "gpio_in"),
> > SUNXI_FUNCTION(0x1, "gpio_out"),
> > SUNXI_FUNCTION(0x2, "i2c1"), /* SCK */
> > - SUNXI_FUNCTION(0x5, "emac0"), /* RXCTL */
> > + SUNXI_FUNCTION(0x5, "emac"), /* RXCTL */
> > SUNXI_FUNCTION_IRQ_BANK(0x6, 6, 2)),
> > SUNXI_PIN(SUNXI_PINCTRL_PIN(H, 3),
> > SUNXI_FUNCTION(0x0, "gpio_in"),
> > SUNXI_FUNCTION(0x1, "gpio_out"),
> > SUNXI_FUNCTION(0x2, "i2c1"), /* SDA */
> > SUNXI_FUNCTION(0x3, "cir0"), /* OUT */
> > - SUNXI_FUNCTION(0x5, "emac0"), /* CLKIN */
> > + SUNXI_FUNCTION(0x5, "emac"), /* CLKIN */
> > SUNXI_FUNCTION_IRQ_BANK(0x6, 6, 3)),
> > SUNXI_PIN(SUNXI_PINCTRL_PIN(H, 4),
> > SUNXI_FUNCTION(0x0, "gpio_in"),
> > SUNXI_FUNCTION(0x1, "gpio_out"),
> > SUNXI_FUNCTION(0x2, "uart3"), /* TX */
> > SUNXI_FUNCTION(0x3, "spi1"), /* CS */
> > - SUNXI_FUNCTION(0x5, "emac0"), /* TXD1 */
> > + SUNXI_FUNCTION(0x5, "emac"), /* TXD1 */
> > SUNXI_FUNCTION_IRQ_BANK(0x6, 6, 4)),
> > SUNXI_PIN(SUNXI_PINCTRL_PIN(H, 5),
> > SUNXI_FUNCTION(0x0, "gpio_in"),
> > @@ -580,14 +580,14 @@ static const struct sunxi_desc_pin a100_pins[] = {
> > SUNXI_FUNCTION(0x2, "uart3"), /* RX */
> > SUNXI_FUNCTION(0x3, "spi1"), /* CLK */
> > SUNXI_FUNCTION(0x4, "ledc"),
> > - SUNXI_FUNCTION(0x5, "emac0"), /* TXD0 */
> > + SUNXI_FUNCTION(0x5, "emac"), /* TXD0 */
> > SUNXI_FUNCTION_IRQ_BANK(0x6, 6, 5)),
> > SUNXI_PIN(SUNXI_PINCTRL_PIN(H, 6),
> > SUNXI_FUNCTION(0x0, "gpio_in"),
> > SUNXI_FUNCTION(0x1, "gpio_out"),
> > SUNXI_FUNCTION(0x2, "uart3"), /* RTS */
> > SUNXI_FUNCTION(0x3, "spi1"), /* MOSI */
> > - SUNXI_FUNCTION(0x5, "emac0"), /* TXCK */
> > + SUNXI_FUNCTION(0x5, "emac"), /* TXCK */
> > SUNXI_FUNCTION_IRQ_BANK(0x6, 6, 6)),
> > SUNXI_PIN(SUNXI_PINCTRL_PIN(H, 7),
> > SUNXI_FUNCTION(0x0, "gpio_in"),
> > @@ -595,7 +595,7 @@ static const struct sunxi_desc_pin a100_pins[] = {
> > SUNXI_FUNCTION(0x2, "uart3"), /* CTS */
> > SUNXI_FUNCTION(0x3, "spi1"), /* MISO */
> > SUNXI_FUNCTION(0x4, "spdif"), /* OUT */
> > - SUNXI_FUNCTION(0x5, "emac0"), /* TXCTL */
> > + SUNXI_FUNCTION(0x5, "emac"), /* TXCTL */
> > SUNXI_FUNCTION_IRQ_BANK(0x6, 6, 7)),
> > SUNXI_PIN(SUNXI_PINCTRL_PIN(H, 8),
> > SUNXI_FUNCTION(0x0, "gpio_in"),
> > @@ -611,7 +611,7 @@ static const struct sunxi_desc_pin a100_pins[] = {
> > SUNXI_FUNCTION(0x2, "dmic"), /* DATA0 */
> > SUNXI_FUNCTION(0x3, "spi2"), /* CLK */
> > SUNXI_FUNCTION(0x4, "i2s2"), /* BCLK */
> > - SUNXI_FUNCTION(0x5, "emac0"), /* MDC */
> > + SUNXI_FUNCTION(0x5, "emac"), /* MDC */
> > SUNXI_FUNCTION_IRQ_BANK(0x6, 6, 9)),
> > SUNXI_PIN(SUNXI_PINCTRL_PIN(H, 10),
> > SUNXI_FUNCTION(0x0, "gpio_in"),
> > @@ -619,7 +619,7 @@ static const struct sunxi_desc_pin a100_pins[] = {
> > SUNXI_FUNCTION(0x2, "dmic"), /* DATA1 */
> > SUNXI_FUNCTION(0x3, "spi2"), /* MOSI */
> > SUNXI_FUNCTION(0x4, "i2s2"), /* LRCK */
> > - SUNXI_FUNCTION(0x5, "emac0"), /* MDIO */
> > + SUNXI_FUNCTION(0x5, "emac"), /* MDIO */
> > SUNXI_FUNCTION_IRQ_BANK(0x6, 6, 10)),
> > SUNXI_PIN(SUNXI_PINCTRL_PIN(H, 11),
> > SUNXI_FUNCTION(0x0, "gpio_in"),
> > @@ -642,33 +642,33 @@ static const struct sunxi_desc_pin a100_pins[] = {
> > SUNXI_FUNCTION(0x1, "gpio_out"),
> > SUNXI_FUNCTION(0x3, "i2c3"), /* SCK */
> > SUNXI_FUNCTION(0x4, "i2s3"), /* MCLK */
> > - SUNXI_FUNCTION(0x5, "emac0"), /* EPHY */
> > + SUNXI_FUNCTION(0x5, "emac"), /* EPHY */
> > SUNXI_FUNCTION_IRQ_BANK(0x6, 6, 13)),
> > SUNXI_PIN(SUNXI_PINCTRL_PIN(H, 14),
> > SUNXI_FUNCTION(0x0, "gpio_in"),
> > SUNXI_FUNCTION(0x1, "gpio_out"),
> > SUNXI_FUNCTION(0x4, "i2s3"), /* BCLK */
> > - SUNXI_FUNCTION(0x5, "emac0"), /* RXD3 */
> > + SUNXI_FUNCTION(0x5, "emac"), /* RXD3 */
> > SUNXI_FUNCTION_IRQ_BANK(0x6, 6, 14)),
> > SUNXI_PIN(SUNXI_PINCTRL_PIN(H, 15),
> > SUNXI_FUNCTION(0x0, "gpio_in"),
> > SUNXI_FUNCTION(0x1, "gpio_out"),
> > SUNXI_FUNCTION(0x4, "i2s3"), /* LRCK */
> > - SUNXI_FUNCTION(0x5, "emac0"), /* RXD2 */
> > + SUNXI_FUNCTION(0x5, "emac"), /* RXD2 */
> > SUNXI_FUNCTION_IRQ_BANK(0x6, 6, 15)),
> > SUNXI_PIN(SUNXI_PINCTRL_PIN(H, 16),
> > SUNXI_FUNCTION(0x0, "gpio_in"),
> > SUNXI_FUNCTION(0x1, "gpio_out"),
> > SUNXI_FUNCTION(0x3, "i2s3_dout0"), /* DOUT0 */
> > SUNXI_FUNCTION(0x4, "i2s3_din1"), /* DIN1 */
> > - SUNXI_FUNCTION(0x5, "emac0"), /* RXCK */
> > + SUNXI_FUNCTION(0x5, "emac"), /* RXCK */
> > SUNXI_FUNCTION_IRQ_BANK(0x6, 6, 16)),
> > SUNXI_PIN(SUNXI_PINCTRL_PIN(H, 17),
> > SUNXI_FUNCTION(0x0, "gpio_in"),
> > SUNXI_FUNCTION(0x1, "gpio_out"),
> > SUNXI_FUNCTION(0x3, "i2s3_dout1"), /* DOUT1 */
> > SUNXI_FUNCTION(0x4, "i2s3_din0"), /* DIN0 */
> > - SUNXI_FUNCTION(0x5, "emac0"), /* TXD3 */
> > + SUNXI_FUNCTION(0x5, "emac"), /* TXD3 */
> > SUNXI_FUNCTION_IRQ_BANK(0x6, 6, 17)),
> > SUNXI_PIN(SUNXI_PINCTRL_PIN(H, 18),
> > SUNXI_FUNCTION(0x0, "gpio_in"),
> > @@ -676,7 +676,7 @@ static const struct sunxi_desc_pin a100_pins[] = {
> > SUNXI_FUNCTION(0x2, "cir0"), /* OUT */
> > SUNXI_FUNCTION(0x3, "i2s3_dout2"), /* DOUT2 */
> > SUNXI_FUNCTION(0x4, "i2s3_din2"), /* DIN2 */
> > - SUNXI_FUNCTION(0x5, "emac0"), /* TXD2 */
> > + SUNXI_FUNCTION(0x5, "emac"), /* TXD2 */
> > SUNXI_FUNCTION_IRQ_BANK(0x6, 6, 18)),
> > SUNXI_PIN(SUNXI_PINCTRL_PIN(H, 19),
> > SUNXI_FUNCTION(0x0, "gpio_in"),
>
>
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