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Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Russell King Cc: noltari@gmail.com, jonas.gorski@gmail.com, Kyle Hendry , Florian Fainelli , netdev@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH net-next v2 7/7] net: dsa: b53: mmap: Implement bcm63xx ephy power control Date: Wed, 23 Jul 2025 20:52:46 -0700 Message-ID: <20250724035300.20497-8-kylehendrydev@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250724035300.20497-1-kylehendrydev@gmail.com> References: <20250724035300.20497-1-kylehendrydev@gmail.com> Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Implement the phy enable/disable calls for b53 mmap, and set the power down registers in the ephy control register appropriately. Signed-off-by: Kyle Hendry --- drivers/net/dsa/b53/b53_mmap.c | 50 ++++++++++++++++++++++++++++++++++ 1 file changed, 50 insertions(+) diff --git a/drivers/net/dsa/b53/b53_mmap.c b/drivers/net/dsa/b53/b53_mmap.c index 8f5914e2a790..f06c3e0cc42a 100644 --- a/drivers/net/dsa/b53/b53_mmap.c +++ b/drivers/net/dsa/b53/b53_mmap.c @@ -24,9 +24,12 @@ #include #include #include +#include #include "b53_priv.h" +#define BCM63XX_EPHY_REG 0x3C + struct b53_phy_info { u32 ephy_enable_mask; u32 ephy_port_mask; @@ -38,6 +41,7 @@ struct b53_mmap_priv { void __iomem *regs; struct regmap *gpio_ctrl; const struct b53_phy_info *phy_info; + u32 phys_enabled; }; static const u32 bcm6318_ephy_offsets[] = {4, 5, 6, 7}; @@ -266,6 +270,50 @@ static int b53_mmap_phy_write16(struct b53_device *dev, int addr, int reg, return -EIO; } +static int bcm63xx_ephy_set(struct b53_device *dev, int port, bool enable) +{ + struct b53_mmap_priv *priv = dev->priv; + const struct b53_phy_info *info = priv->phy_info; + struct regmap *gpio_ctrl = priv->gpio_ctrl; + u32 mask, val; + + if (enable) { + mask = (info->ephy_enable_mask << info->ephy_offset[port]) + | BIT(info->ephy_bias_bit); + val = 0; + } else { + mask = (info->ephy_enable_mask << info->ephy_offset[port]); + if (!((priv->phys_enabled & ~BIT(port)) & info->ephy_port_mask)) + mask |= BIT(info->ephy_bias_bit); + val = mask; + } + return regmap_update_bits(gpio_ctrl, BCM63XX_EPHY_REG, mask, val); +} + +static void b53_mmap_phy_enable(struct b53_device *dev, int port) +{ + struct b53_mmap_priv *priv = dev->priv; + int ret = 0; + + if (priv->phy_info && (BIT(port) & priv->phy_info->ephy_port_mask)) + ret = bcm63xx_ephy_set(dev, port, true); + + if (!ret) + priv->phys_enabled |= BIT(port); +} + +static void b53_mmap_phy_disable(struct b53_device *dev, int port) +{ + struct b53_mmap_priv *priv = dev->priv; + int ret = 0; + + if (priv->phy_info && (BIT(port) & priv->phy_info->ephy_port_mask)) + ret = bcm63xx_ephy_set(dev, port, false); + + if (!ret) + priv->phys_enabled &= ~BIT(port); +} + static const struct b53_io_ops b53_mmap_ops = { .read8 = b53_mmap_read8, .read16 = b53_mmap_read16, @@ -279,6 +327,8 @@ static const struct b53_io_ops b53_mmap_ops = { .write64 = b53_mmap_write64, .phy_read16 = b53_mmap_phy_read16, .phy_write16 = b53_mmap_phy_write16, + .phy_enable = b53_mmap_phy_enable, + .phy_disable = b53_mmap_phy_disable, }; static int b53_mmap_probe_of(struct platform_device *pdev, -- 2.43.0