[U-Boot] [PATCH 1/2] rk3399: add basic soc driver

[Kever Yang <kever.yang@rock-chips.com>]

On 07/25/2016 12:50 PM, Kever Yang wrote:
> This patch add driver for:

[snip]
...
> +
> +static ulong rk3399_clk_set_rate(struct clk *clk, ulong rate)
> +{
> +	struct rk3399_clk_priv *priv = dev_get_priv(clk->dev);
> +
> +	switch (clk->id) {
> +	case 0 ... 63:
> +		return 0;
> +	case SCLK_SDMMC:
> +	case SCLK_EMMC:
> +		rk3399_mmc_set_clk(priv->cru, clk->id, rate);
> +		break;
> +	case SCLK_I2C1:
> +	case SCLK_I2C2:
> +	case SCLK_I2C3:
> +	case SCLK_I2C5:
> +	case SCLK_I2C6:
> +	case SCLK_I2C7:
> +		rk3399_i2c_set_clk(priv->cru, clk->id, rate);
> +		break;
> +	case DCLK_VOP0:
> +	case DCLK_VOP1:
> +		rk3399_vop_set_clk(priv->cru, clk->id, rate);
> +		break;
> +	default:
> +		return -ENOENT;
> +	}
> +
> +	return 0;

It suppose to return a real clock rate instead a '0' here, will update 
with other
potential comments later.

Thanks,
- Kever
> +}
> +
> +static struct clk_ops rk3399_clk_ops = {
> +	.get_rate = rk3399_clk_get_rate,
> +	.set_rate = rk3399_clk_set_rate,
> +};
> +
> +void *rockchip_get_cru(void)
> +{
> +	struct udevice *dev;
> +	fdt_addr_t addr;
> +	int ret;
> +
> +	ret = uclass_get_device_by_name(UCLASS_CLK,
> +					"clock-controller at ff760000",
> +					&dev);
> +	if (ret)
> +		return ERR_PTR(ret);
> +
> +	addr = dev_get_addr(dev);
> +	if (addr == FDT_ADDR_T_NONE)
> +		return ERR_PTR(-EINVAL);
> +
> +	return (void *)addr;
> +}
> +
> +static int rk3399_clk_probe(struct udevice *dev)
> +{
> +	struct rk3399_clk_priv *priv = dev_get_priv(dev);
> +
> +	priv->cru = (struct rk3399_cru *)dev_get_addr(dev);
> +	rkclk_init(priv->cru);
> +
> +	return 0;
> +}
> +
> +static int rk3399_clk_bind(struct udevice *dev)
> +{
> +	int ret;
> +
> +	/* The reset driver does not have a device node, so bind it here */
> +	ret = device_bind_driver(gd->dm_root, "rk3399_sysreset", "reset", &dev);
> +	if (ret)
> +		printf("Warning: No RK3399 reset driver: ret=%d\n", ret);
> +
> +	return 0;
> +}
> +
> +static const struct udevice_id rk3399_clk_ids[] = {
> +	{ .compatible = "rockchip,rk3399-cru" },
> +	{ }
> +};
> +
> +U_BOOT_DRIVER(clk_rk3399) = {
> +	.name		= "clk_rk3399",
> +	.id		= UCLASS_CLK,
> +	.of_match	= rk3399_clk_ids,
> +	.priv_auto_alloc_size = sizeof(struct rk3399_clk_priv),
> +	.ops		= &rk3399_clk_ops,
> +	.bind		= rk3399_clk_bind,
> +	.probe		= rk3399_clk_probe,
> +};