2 * Copyright (c) 2013 Google, Inc
4 * SPDX-License-Identifier: GPL-2.0+
13 #include <asm/arch/clock.h>
14 #include <asm/arch/periph.h>
15 #include <linux/err.h>
17 DECLARE_GLOBAL_DATA_PTR
;
19 struct rockchip_dwmmc_priv
{
21 struct rk3288_grf
*grf
;
22 struct dwmci_host host
;
25 static uint
rockchip_dwmmc_get_mmc_clk(struct dwmci_host
*host
, uint freq
)
27 struct udevice
*dev
= host
->priv
;
28 struct rockchip_dwmmc_priv
*priv
= dev_get_priv(dev
);
31 ret
= clk_set_periph_rate(priv
->clk
, PERIPH_ID_SDMMC0
+ host
->dev_index
,
34 debug("%s: err=%d\n", __func__
, ret
);
41 static int rockchip_dwmmc_ofdata_to_platdata(struct udevice
*dev
)
43 struct rockchip_dwmmc_priv
*priv
= dev_get_priv(dev
);
44 struct dwmci_host
*host
= &priv
->host
;
46 host
->name
= dev
->name
;
47 host
->ioaddr
= (void *)dev_get_addr(dev
);
48 host
->buswidth
= fdtdec_get_int(gd
->fdt_blob
, dev
->of_offset
,
50 host
->get_mmc_clk
= rockchip_dwmmc_get_mmc_clk
;
53 /* TODO(sjg@chromium.org): Remove the need for this hack */
54 host
->dev_index
= (ulong
)host
->ioaddr
== 0xff0f0000 ? 0 : 1;
59 static int rockchip_dwmmc_probe(struct udevice
*dev
)
61 struct mmc_uclass_priv
*upriv
= dev_get_uclass_priv(dev
);
62 struct rockchip_dwmmc_priv
*priv
= dev_get_priv(dev
);
63 struct dwmci_host
*host
= &priv
->host
;
67 priv
->grf
= syscon_get_first_range(ROCKCHIP_SYSCON_GRF
);
68 if (IS_ERR(priv
->grf
))
69 return PTR_ERR(priv
->grf
);
70 ret
= uclass_get_device(UCLASS_CLK
, CLK_GENERAL
, &priv
->clk
);
74 ret
= fdtdec_get_int_array(gd
->fdt_blob
, dev
->of_offset
,
75 "clock-freq-min-max", minmax
, 2);
77 ret
= add_dwmci(host
, minmax
[1], minmax
[0]);
81 upriv
->mmc
= host
->mmc
;
86 static const struct udevice_id rockchip_dwmmc_ids
[] = {
87 { .compatible
= "rockchip,rk3288-dw-mshc" },
91 U_BOOT_DRIVER(rockchip_dwmmc_drv
) = {
92 .name
= "rockchip_dwmmc",
94 .of_match
= rockchip_dwmmc_ids
,
95 .ofdata_to_platdata
= rockchip_dwmmc_ofdata_to_platdata
,
96 .probe
= rockchip_dwmmc_probe
,
97 .priv_auto_alloc_size
= sizeof(struct rockchip_dwmmc_priv
),