On Tue, Oct 10, 2017 at 02:38:19PM +0200, Clément Leger wrote:
> From ed1cbcd05d5efeb4012d77a9a4ab9c1da0449bdc Mon Sep 17 00:00:00 2001
> From: Clement Leger <clement.le...@kalray.eu>
> Date: Tue, 10 Oct 2017 14:29:49 +0200
> Subject: [PATCH] Marvell: implement marvell_of_reg_init
>
> Implement marvell_of_reg_init in order to use marvell,reg-init property
> from device-tree. The code is taken from Linux kernel and slighlty
> modify to fit barebox structures.
> ---
> drivers/net/phy/marvell.c | 73
> ++++++++++++++++++++++++++++++++++++++++++++---
> 1 file changed, 69 insertions(+), 4 deletions(-)
Applied, thanks
Sascha
>
> diff --git a/drivers/net/phy/marvell.c b/drivers/net/phy/marvell.c
> index ea5a4a9..73d6453 100644
> --- a/drivers/net/phy/marvell.c
> +++ b/drivers/net/phy/marvell.c
> @@ -175,13 +175,78 @@ static inline bool phy_interface_is_rgmii(struct
> phy_device *phydev)
> };
>
> /*
> - * This same function in the Linux kernel parses the marvell,reg-init dt
> - * property and does the necessary register writes. It's kept as an exercise
> for
> - * a future user to implement this. :-)
> + * Set and/or override some configuration registers based on the
> + * marvell,reg-init property stored in the of_node for the phydev.
> + *
> + * marvell,reg-init = <reg-page reg mask value>,...;
> + *
> + * There may be one or more sets of <reg-page reg mask value>:
> + *
> + * reg-page: which register bank to use.
> + * reg: the register.
> + * mask: if non-zero, ANDed with existing register value.
> + * value: ORed with the masked value and written to the regiser.
> + *
> */
> static int marvell_of_reg_init(struct phy_device *phydev)
> {
> - return 0;
> + const __be32 *paddr;
> + int len, i, saved_page, current_page, page_changed, ret;
> +
> + if (!phydev->dev.device_node)
> + return 0;
> +
> + paddr = of_get_property(phydev->dev.device_node,
> + "marvell,reg-init", &len);
> + if (!paddr || len < (4 * sizeof(*paddr)))
> + return 0;
> +
> + saved_page = phy_read(phydev, MII_MARVELL_PHY_PAGE);
> + if (saved_page < 0)
> + return saved_page;
> + page_changed = 0;
> + current_page = saved_page;
> +
> + ret = 0;
> + len /= sizeof(*paddr);
> + for (i = 0; i < len - 3; i += 4) {
> + u16 reg_page = be32_to_cpup(paddr + i);
> + u16 reg = be32_to_cpup(paddr + i + 1);
> + u16 mask = be32_to_cpup(paddr + i + 2);
> + u16 val_bits = be32_to_cpup(paddr + i + 3);
> + int val;
> +
> + if (reg_page != current_page) {
> + current_page = reg_page;
> + page_changed = 1;
> + ret = phy_write(phydev, MII_MARVELL_PHY_PAGE, reg_page);
> + if (ret < 0)
> + goto err;
> + }
> +
> + val = 0;
> + if (mask) {
> + val = phy_read(phydev, reg);
> + if (val < 0) {
> + ret = val;
> + goto err;
> + }
> + val &= mask;
> + }
> + val |= val_bits;
> +
> + ret = phy_write(phydev, reg, val);
> + if (ret < 0)
> + goto err;
> +
> + }
> +err:
> + if (page_changed) {
> + i = phy_write(phydev, MII_MARVELL_PHY_PAGE, saved_page);
> + if (ret == 0)
> + ret = i;
> + }
> + return ret;
> }
>
> static int m88e1121_config_aneg(struct phy_device *phydev)
> --
> 1.8.3.1
>
>
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