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| author | Josua Mayer <josua@solid-run.com> | 2022-05-19 12:31:57 +0300 |
|---|---|---|
| committer | Stefano Babic <sbabic@denx.de> | 2022-06-14 21:25:26 +0200 |
| commit | 54337abb141d898ae114f51619531cf905d5b0b5 (patch) | |
| tree | dd69ef79eaeff49f44c26d766f8aa1d65b283a79 | |
| parent | 4cc25cd5ce6923ccd0a6164703bcbde0216fd77d (diff) | |
| download | u-boot-54337abb141d898ae114f51619531cf905d5b0b5.zip u-boot-54337abb141d898ae114f51619531cf905d5b0b5.tar.gz u-boot-54337abb141d898ae114f51619531cf905d5b0b5.tar.bz2 | |
phy: adin: add support for clock output
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 the Linux implementation for this feature,
which has been added to netdev/net-next.git [1].
[2] https://patchwork.kernel.org/project/netdevbpf/cover/20220517085143.3749-1-josua@solid-run.com/
Signed-off-by: Josua Mayer <josua@solid-run.com>
| -rw-r--r-- | drivers/net/phy/adin.c | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/drivers/net/phy/adin.c b/drivers/net/phy/adin.c index e60f288..a5bfd96 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 <josua@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) \ @@ -144,6 +155,33 @@ 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, "adaptive-free-running") == 0) { + sel |= ADIN1300_GE_CLK_CFG_HRT_FREE; + } 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; @@ -202,6 +240,10 @@ 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) |