From: asheplyakov@yandex.ru To: devel@lists.altlinux.org Cc: Alexey Sheplyakov <asheplyakov@basealt.ru>, Dmitry Dunaev <dmitry.dunaev@baikalelectronics.ru>, Alexey Sheplyakov <asheplyakov@altlinux.org>, Evgeny Sinelnikov <sin@basealt.ru>, Vitaly Chikunov <vt@altlinux.org>, Igor Chudov <nir@basealt.ru> Subject: [devel] [PATCH 03/35] net: stmmac: custom mdio reset for some Baikal-M boards Date: Fri, 20 May 2022 20:28:17 +0400 Message-ID: <20220520162849.1554351-4-asheplyakov@yandex.ru> (raw) In-Reply-To: <20220520162849.1554351-1-asheplyakov@yandex.ru> From: Alexey Sheplyakov <asheplyakov@altlinux.org> Signed-off-by: Alexey Sheplyakov <asheplyakov@basealt.ru> Signed-off-by: Dmitry Dunaev <dmitry.dunaev@baikalelectronics.ru> X-feature-Baikal-M --- .../net/ethernet/stmicro/stmmac/stmmac_mdio.c | 63 +++++++++++++++++++ 1 file changed, 63 insertions(+) diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c index a5d150c5f3d8..639bcc35e928 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c @@ -346,6 +346,63 @@ static int stmmac_mdio_write(struct mii_bus *bus, int phyaddr, int phyreg, return ret; } +#define MAC_GPIO 0xe0 /* GPIO register */ +#define MAC_GPIO_GPO BIT(8) /* output port */ + +#if IS_ENABLED(CONFIG_STMMAC_PLATFORM) && IS_ENABLED(CONFIG_OF) +/** + * Reset the MII bus via MAC GP_OUT pin + */ +static int stmmac_mdio_reset_gp_out(struct stmmac_priv *priv) { + u32 value, high, low; + u32 delays[3] = { 0, 0, 0 }; + bool active_low = false; + struct device_node *np = priv->device->of_node; + + if (!np) + return -ENODEV; + + if (!of_property_read_bool(np, "snps,reset-gp-out")) { + dev_warn(priv->device, "snps,reset-gp-out is not set\n"); + return -ENODEV; + } + + dev_info(priv->device, "resetting MDIO via GP_OUT\n"); + active_low = of_property_read_bool(np, "snsps,reset-active-low"); + of_property_read_u32_array(np, "snps,reset-delays-us", delays, 3); + + value = readl(priv->ioaddr + MAC_GPIO); + if (active_low) { + high = value | MAC_GPIO_GPO; + low = value & ~MAC_GPIO_GPO; + } else { + high = value & ~MAC_GPIO_GPO; + low = value | MAC_GPIO_GPO; + } + + writel(high, priv->ioaddr + MAC_GPIO); + if (delays[0]) + msleep(DIV_ROUND_UP(delays[0], 1000)); + + writel(low, priv->ioaddr + MAC_GPIO); + if (delays[1]) + msleep(DIV_ROUND_UP(delays[1], 1000)); + + writel(high, priv->ioaddr + MAC_GPIO); + if (delays[2]) + msleep(DIV_ROUND_UP(delays[2], 1000)); + + /* Clear PHY reset */ + udelay(10); + value = readl(priv->ioaddr + MAC_GPIO); + value |= MAC_GPIO_GPO; + writel(value, priv->ioaddr + MAC_GPIO); + msleep(1000); + dev_info(priv->device, "mdio reset completed\n"); + return 0; +} +#endif + /** * stmmac_mdio_reset * @bus: points to the mii_bus structure @@ -361,8 +418,14 @@ int stmmac_mdio_reset(struct mii_bus *bus) #ifdef CONFIG_OF if (priv->device->of_node) { struct gpio_desc *reset_gpio; + bool reset_gp_out; u32 delays[3] = { 0, 0, 0 }; + reset_gp_out = of_property_read_bool(priv->device->of_node, + "snps,reset-gp-out"); + if (reset_gp_out) + return stmmac_mdio_reset_gp_out(priv); + reset_gpio = devm_gpiod_get_optional(priv->device, "snps,reset", GPIOD_OUT_LOW); -- 2.32.0
next prev parent reply other threads:[~2022-05-20 16:28 UTC|newest] Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-05-20 16:28 [devel] kernel-image-un-def: Baikal-M asheplyakov 2022-05-20 16:28 ` [devel] [PATCH 01/35] net: stmmac: inital support of Baikal-T1/M SoCs GMAC asheplyakov 2022-05-20 16:28 ` [devel] [PATCH 02/35] dt-bindings: dwmac: Add bindings for Baikal-T1/M SoCs asheplyakov 2022-05-20 16:28 ` asheplyakov [this message] 2022-05-20 16:28 ` [devel] [PATCH 04/35] net: dwmac-baikal: added compatible strings asheplyakov 2022-05-20 16:28 ` [devel] [PATCH 05/35] hwmon: bt1-pvt: access registers via pvt_{readl, writel} helpers asheplyakov 2022-05-20 16:28 ` [devel] [PATCH 06/35] hwmon: bt1-pvt: define pvt_readl/pvt_writel for Baikal-M SoC asheplyakov 2022-05-20 16:28 ` [devel] [PATCH 07/35] hwmon: bt1-pvt: adjusted probing " asheplyakov 2022-05-20 16:28 ` [devel] [PATCH 08/35] hwmon: bt1-pvt: added compatible baikal,pvt asheplyakov 2022-05-20 16:28 ` [devel] [PATCH 09/35] clk: added Baikal-M clock management unit driver asheplyakov 2022-05-20 16:28 ` [devel] [PATCH 10/35] cpufreq-dt: don't load on Baikal-M SoC asheplyakov 2022-05-20 16:28 ` [devel] [PATCH 11/35] usb: dwc3: of-simple: added compatible string for " asheplyakov 2022-05-20 16:28 ` [devel] [PATCH 12/35] arm64: Enable armv8 based Baikal-M SoC support asheplyakov 2022-05-20 16:28 ` [devel] [PATCH 13/35] drm: new bridge driver - stdp4028 asheplyakov 2022-05-20 16:28 ` [devel] [PATCH 14/35] drm: added Baikal-M SoC video display unit driver asheplyakov 2022-05-20 16:28 ` [devel] [PATCH 15/35] dw-hdmi-ahb-audio: support Baikal-M SoC asheplyakov 2022-05-20 16:28 ` [devel] [PATCH 16/35] Added TF307/TF306 board management controller driver asheplyakov 2022-05-20 16:28 ` [devel] [PATCH 17/35] ALSA: hda: Baikal-M support asheplyakov 2022-05-20 16:28 ` [devel] [PATCH 18/35] [rejected] serial: 8250_dw: verify clock rate in dw8250_set_termios asheplyakov 2022-05-20 16:53 ` Andy Shevchenko 2022-05-20 16:28 ` [devel] [PATCH 19/35] drm/panfrost: forcibly set dma-coherent on Baikal-M asheplyakov 2022-05-20 16:28 ` [devel] [PATCH 20/35] drm/panfrost: disable devfreq " asheplyakov 2022-05-20 16:28 ` [devel] [PATCH 21/35] pm: disable all sleep states on Baikal-M based boards asheplyakov 2022-05-20 16:28 ` [devel] [PATCH 22/35] arm64-stub: fixed secondary cores boot on Baikal-M SoC asheplyakov 2022-05-20 16:28 ` [devel] [PATCH 23/35] efi-rtc: avoid calling efi.get_time " asheplyakov 2022-05-20 16:28 ` [devel] [PATCH 24/35] net: fwnode_get_phy_id: consider all compatible strings asheplyakov 2022-05-20 16:28 ` [devel] [PATCH 25/35] (BROKEN) dwc-i2s: support Baikal-M SoC asheplyakov 2022-05-20 16:28 ` [devel] [PATCH 26/35] input: added TF307 serio PS/2 emulator driver asheplyakov 2022-05-20 16:28 ` [devel] [PATCH 27/35] arm64: added Baikal-M SoC and TF307 board device tree asheplyakov 2022-05-20 16:28 ` [devel] [PATCH 28/35] arm64: device tree: baikal: mark GPU as dma-coherent asheplyakov 2022-05-20 16:28 ` [devel] [PATCH 29/35] arm64: device tree: Baikal-M: fixed PHY binding description asheplyakov 2022-05-20 16:28 ` [devel] [PATCH 30/35] arm64: device tree: Baikal-M: fixed gpio alias asheplyakov 2022-05-20 16:28 ` [devel] [PATCH 31/35] arm64: device tree: Baikal-M: fixed GPU opp_table asheplyakov 2022-05-20 16:28 ` [devel] [PATCH 32/35] arm64: device tree: Baikal-M: fixed CPUs opp_table asheplyakov 2022-05-20 16:28 ` [devel] [PATCH 33/35] arm64: defconfig for Baikal-M support testing asheplyakov 2022-05-20 16:28 ` [devel] [PATCH 34/35] config-aarch64: enable more Baikal-M related drivers asheplyakov 2022-05-20 16:28 ` [devel] [PATCH 35/35] 1:5.17.9-alt2 asheplyakov 2022-05-21 4:04 ` P X 2022-05-21 16:50 ` Alexey Sheplyakov 2022-05-21 16:55 ` [devel] devel-kernel@ Антон Мидюков 2022-05-22 5:51 ` [devel] [PATCH 35/35] 1:5.17.9-alt2 Dmitry V. Levin 2022-05-23 8:51 ` Alexey Sheplyakov 2022-05-23 9:58 ` Dmitry V. Levin 2022-05-23 11:21 ` Alexey Gladkov 2022-05-23 9:47 ` [devel] Baikal-M patches for et101, aqbm1000, tf307 Evgeny Sinelnikov
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