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7e26335b1a
On Amlogic chipsets, the bias set through pinconf applies to the pad itself, not only the GPIO function. This means that even when we change the function of the pad from GPIO to anything else, the bias previously set still applies. As we have seen with the eMMC, depending on the bias type and the function, it may trigger problems. The underlying issue is that we inherit whatever was left by previous user of the pad (pinconf, u-boot or the ROM code). As a consequence, the actual setup we will get is undefined. There is nothing mentioned in the documentation about pad bias and pinmux function, however leaving it undefined is not an option. This change consistently disable the pad bias for every pinmux functions. It seems to work well, we can only assume that the necessary bias (if any) is already provided by the pin function itself. Signed-off-by: Jerome Brunet <jbrunet@baylibre.com> Acked-by: Martin Blumenstingl<martin.blumenstingl@googlemail.com> Signed-off-by: Kevin Hilman <khilman@baylibre.com>
56 lines
1.2 KiB
Plaintext
56 lines
1.2 KiB
Plaintext
// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
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/*
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* Copyright (c) 2017 Martin Blumenstingl <martin.blumenstingl@googlemail.com>.
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*/
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#include "meson8.dtsi"
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/ {
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model = "Amlogic Meson8m2 SoC";
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compatible = "amlogic,meson8m2";
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}; /* end of / */
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&clkc {
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compatible = "amlogic,meson8m2-clkc", "amlogic,meson8-clkc";
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};
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ðmac {
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compatible = "amlogic,meson8m2-dwmac", "snps,dwmac";
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reg = <0xc9410000 0x10000
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0xc1108140 0x8>;
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clocks = <&clkc CLKID_ETH>,
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<&clkc CLKID_MPLL2>,
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<&clkc CLKID_MPLL2>;
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clock-names = "stmmaceth", "clkin0", "clkin1";
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resets = <&reset RESET_ETHERNET>;
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reset-names = "stmmaceth";
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};
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&pinctrl_aobus {
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compatible = "amlogic,meson8m2-aobus-pinctrl",
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"amlogic,meson8-aobus-pinctrl";
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};
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&pinctrl_cbus {
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compatible = "amlogic,meson8m2-cbus-pinctrl",
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"amlogic,meson8-cbus-pinctrl";
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eth_rgmii_pins: ethernet {
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mux {
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groups = "eth_tx_clk_50m", "eth_tx_en",
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"eth_txd3", "eth_txd2",
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"eth_txd1", "eth_txd0",
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"eth_rx_clk_in", "eth_rx_dv",
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"eth_rxd3", "eth_rxd2",
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"eth_rxd1", "eth_rxd0",
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"eth_mdio", "eth_mdc";
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function = "ethernet";
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bias-disable;
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};
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};
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};
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&wdt {
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compatible = "amlogic,meson8m2-wdt", "amlogic,meson8b-wdt";
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};
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