The ADIN1300 supports generating certain clocks on its GP_CLK pin, as well as providing the reference clock on CLK25_REF.
Add support for selecting the clock via device-tree properties. This patch is based on just submitted patches to Linux [1] [2]. [1] https://patchwork.kernel.org/project/netdevbpf/patch/20220428082848.12191-2-jo...@solid-run.com/ [2] https://patchwork.kernel.org/project/netdevbpf/patch/20220428082848.12191-4-jo...@solid-run.com/ Signed-off-by: Josua Mayer <jo...@solid-run.com> --- drivers/net/phy/adin.c | 46 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 46 insertions(+) diff --git a/drivers/net/phy/adin.c b/drivers/net/phy/adin.c index 2433e76fea..485430b128 100644 --- a/drivers/net/phy/adin.c +++ b/drivers/net/phy/adin.c @@ -4,6 +4,7 @@ * * Copyright 2019 Analog Devices Inc. * Copyright 2022 Variscite Ltd. + * Copyright 2022 Josua Mayer <jo...@solid-run.com> */ #include <common.h> #include <phy.h> @@ -13,6 +14,16 @@ #define PHY_ID_ADIN1300 0x0283bc30 #define ADIN1300_EXT_REG_PTR 0x10 #define ADIN1300_EXT_REG_DATA 0x11 + +#define ADIN1300_GE_CLK_CFG_REG 0xff1f +#define ADIN1300_GE_CLK_CFG_MASK GENMASK(5, 0) +#define ADIN1300_GE_CLK_CFG_RCVR_125 BIT(5) +#define ADIN1300_GE_CLK_CFG_FREE_125 BIT(4) +#define ADIN1300_GE_CLK_CFG_REF_EN BIT(3) +#define ADIN1300_GE_CLK_CFG_HRT_RCVR BIT(2) +#define ADIN1300_GE_CLK_CFG_HRT_FREE BIT(1) +#define ADIN1300_GE_CLK_CFG_25 BIT(0) + #define ADIN1300_GE_RGMII_CFG 0xff23 #define ADIN1300_GE_RGMII_RX_MSK GENMASK(8, 6) #define ADIN1300_GE_RGMII_RX_SEL(x) \ @@ -115,6 +126,37 @@ static int adin_ext_write(struct phy_device *phydev, const u32 regnum, const u16 return phy_write(phydev, MDIO_DEVAD_NONE, ADIN1300_EXT_REG_DATA, val); } +static int adin_config_clk_out(struct phy_device *phydev) +{ + ofnode node = phy_get_ofnode(phydev); + const char *val = NULL; + u8 sel = 0; + + val = ofnode_read_string(node, "adi,phy-output-clock"); + if (!val) { + /* property not present, do not enable GP_CLK pin */ + } else if (strcmp(val, "25mhz-reference") == 0) { + sel |= ADIN1300_GE_CLK_CFG_25; + } else if (strcmp(val, "125mhz-free-running") == 0) { + sel |= ADIN1300_GE_CLK_CFG_FREE_125; + } else if (strcmp(val, "125mhz-recovered") == 0) { + sel |= ADIN1300_GE_CLK_CFG_RCVR_125; + } else if (strcmp(val, "adaptive-free-running") == 0) { + sel |= ADIN1300_GE_CLK_CFG_HRT_FREE; + } else if (strcmp(val, "adaptive-recovered") == 0) { + sel |= ADIN1300_GE_CLK_CFG_HRT_RCVR; + } else { + pr_err("%s: invalid adi,phy-output-clock\n", __func__); + return -EINVAL; + } + + if (ofnode_read_bool(node, "adi,phy-output-reference-clock")) + sel |= ADIN1300_GE_CLK_CFG_REF_EN; + + return adin_ext_write(phydev, ADIN1300_GE_CLK_CFG_REG, + ADIN1300_GE_CLK_CFG_MASK & sel); +} + static int adin_config_rgmii_mode(struct phy_device *phydev) { u16 reg_val; @@ -168,6 +210,10 @@ static int adin1300_config(struct phy_device *phydev) printf("ADIN1300 PHY detected at addr %d\n", phydev->addr); + ret = adin_config_clk_out(phydev); + if (ret < 0) + return ret; + ret = adin_config_rgmii_mode(phydev); if (ret < 0) -- 2.34.1
