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Message-ID: <f7f67fbe-41e7-4497-cb01-a1fa2195d4b0@rock-chips.com>
Date: Wed, 16 May 2018 14:34:21 +0800
From: Shawn Lin <shawn.lin@...k-chips.com>
To: David Wu <david.wu@...k-chips.com>, robh+dt@...nel.org
Cc: davem@...emloft.net, heiko@...ech.de, shawn.lin@...k-chips.com,
mark.rutland@....com, huangtao@...k-chips.com,
netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-rockchip@...ts.infradead.org,
linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH] ethernet: stmmac: dwmac-rk: Add GMAC support for px30
Hi David,
On 2018/5/16 11:38, David Wu wrote:
> Add constants and callback functions for the dwmac on px30 soc.
s/soc/SoC
> The base structure is the same, but registers and the bits in
> them moved slightly, and add the clk_mac_speed for the select
s/moved/are moved
> of mac speed.
for selecting mas speed.
>
> Signed-off-by: David Wu <david.wu@...k-chips.com>
git log --oneline drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
shows very inconsistent format wrt. commit title, so please
follow the exsiting exsamples as possible.
> ---
> .../devicetree/bindings/net/rockchip-dwmac.txt | 1 +
> drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c | 64 ++++++++++++++++++++++
> 2 files changed, 65 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/net/rockchip-dwmac.txt b/Documentation/devicetree/bindings/net/rockchip-dwmac.txt
> index 9c16ee2..3b71da7 100644
> --- a/Documentation/devicetree/bindings/net/rockchip-dwmac.txt
> +++ b/Documentation/devicetree/bindings/net/rockchip-dwmac.txt
It'd be better to split doc changes into a separate patch.
> @@ -4,6 +4,7 @@ The device node has following properties.
>
> Required properties:
> - compatible: should be "rockchip,<name>-gamc"
> + "rockchip,px30-gmac": found on PX30 SoCs
> "rockchip,rk3128-gmac": found on RK312x SoCs
> "rockchip,rk3228-gmac": found on RK322x SoCs
> "rockchip,rk3288-gmac": found on RK3288 SoCs
> diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
> index 13133b3..4b2ab71 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
> +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
> @@ -61,6 +61,7 @@ struct rk_priv_data {
> struct clk *mac_clk_tx;
> struct clk *clk_mac_ref;
> struct clk *clk_mac_refout;
> + struct clk *clk_mac_speed;
No need to do anything now but it seems you could consider doing some
cleanup by using clk bulk APIs in the future.
> struct clk *aclk_mac;
> struct clk *pclk_mac;
> struct clk *clk_phy;
> @@ -83,6 +84,64 @@ struct rk_priv_data {
> (((tx) ? soc##_GMAC_TXCLK_DLY_ENABLE : soc##_GMAC_TXCLK_DLY_DISABLE) | \
> ((rx) ? soc##_GMAC_RXCLK_DLY_ENABLE : soc##_GMAC_RXCLK_DLY_DISABLE))
>
> +#define PX30_GRF_GMAC_CON1 0X0904
s/0X0904/0x0904 , since the other constants in this file follow the
same format.
> +
> +/* PX30_GRF_GMAC_CON1 */
> +#define PX30_GMAC_PHY_INTF_SEL_RMII (GRF_CLR_BIT(4) | GRF_CLR_BIT(5) | \
> + GRF_BIT(6))
> +#define PX30_GMAC_SPEED_10M GRF_CLR_BIT(2)
> +#define PX30_GMAC_SPEED_100M GRF_BIT(2)
> +
> +static void px30_set_to_rmii(struct rk_priv_data *bsp_priv)
> +{
> + struct device *dev = &bsp_priv->pdev->dev;
> +
> + if (IS_ERR(bsp_priv->grf)) {
> + dev_err(dev, "%s: Missing rockchip,grf property\n", __func__);
> + return;
> + }
> +
> + regmap_write(bsp_priv->grf, PX30_GRF_GMAC_CON1,
> + PX30_GMAC_PHY_INTF_SEL_RMII);
> +}
> +
> +static void px30_set_rmii_speed(struct rk_priv_data *bsp_priv, int speed)
> +{
> + struct device *dev = &bsp_priv->pdev->dev;
> + int ret;
> +
> + if (IS_ERR(bsp_priv->clk_mac_speed)) {
> + dev_err(dev, "%s: Missing clk_mac_speed clock\n", __func__);
> + return;
> + }
> +
> + if (speed == 10) {
> + regmap_write(bsp_priv->grf, PX30_GRF_GMAC_CON1,
> + PX30_GMAC_SPEED_10M);
> +
> + ret = clk_set_rate(bsp_priv->clk_mac_speed, 2500000);
> + if (ret)
> + dev_err(dev, "%s: set clk_mac_speed rate 2500000 failed: %d\n",
> + __func__, ret);
> + } else if (speed == 100) {
> + regmap_write(bsp_priv->grf, PX30_GRF_GMAC_CON1,
> + PX30_GMAC_SPEED_100M);
> +
> + ret = clk_set_rate(bsp_priv->clk_mac_speed, 25000000);
> + if (ret)
> + dev_err(dev, "%s: set clk_mac_speed rate 25000000 failed: %d\n",
> + __func__, ret);
I know it follows the existing examples, but IMHO it duplicates
unnecessary code as all the difference is PX30_GMAC_SPEED_*
> +
> + } else {
> + dev_err(dev, "unknown speed value for RMII! speed=%d", speed);
> + }
> +}
> +
> +static const struct rk_gmac_ops px30_ops = {
> + .set_to_rmii = px30_set_to_rmii,
> + .set_rmii_speed = px30_set_rmii_speed,
> +};
> +
> #define RK3128_GRF_MAC_CON0 0x0168
> #define RK3128_GRF_MAC_CON1 0x016c
>
> @@ -1042,6 +1101,10 @@ static int rk_gmac_clk_init(struct plat_stmmacenet_data *plat)
> }
> }
>
> + bsp_priv->clk_mac_speed = devm_clk_get(dev, "clk_mac_speed");
Mightbe it'd be better to use "mac-speed" in DT bindings.
> + if (IS_ERR(bsp_priv->clk_mac_speed))
> + dev_err(dev, "cannot get clock %s\n", "clk_mac_speed");
> +
Would you like to handle deferred probe?
> if (bsp_priv->clock_input) {
> dev_info(dev, "clock input from PHY\n");
> } else {
> @@ -1424,6 +1487,7 @@ static int rk_gmac_resume(struct device *dev)
> static SIMPLE_DEV_PM_OPS(rk_gmac_pm_ops, rk_gmac_suspend, rk_gmac_resume);
>
> static const struct of_device_id rk_gmac_dwmac_match[] = {
> + { .compatible = "rockchip,px30-gmac", .data = &px30_ops },
> { .compatible = "rockchip,rk3128-gmac", .data = &rk3128_ops },
> { .compatible = "rockchip,rk3228-gmac", .data = &rk3228_ops },
> { .compatible = "rockchip,rk3288-gmac", .data = &rk3288_ops },
>
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