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 /* use non-removeable as sdcard and emmc as judgement */
54 if (fdtdec_get_bool(gd
->fdt_blob
, dev
->of_offset
, "non-removable"))
60 static int rockchip_dwmmc_probe(struct udevice
*dev
)
62 struct mmc_uclass_priv
*upriv
= dev_get_uclass_priv(dev
);
63 struct rockchip_dwmmc_priv
*priv
= dev_get_priv(dev
);
64 struct dwmci_host
*host
= &priv
->host
;
68 priv
->grf
= syscon_get_first_range(ROCKCHIP_SYSCON_GRF
);
69 if (IS_ERR(priv
->grf
))
70 return PTR_ERR(priv
->grf
);
71 ret
= uclass_get_device(UCLASS_CLK
, CLK_GENERAL
, &priv
->clk
);
75 ret
= fdtdec_get_int_array(gd
->fdt_blob
, dev
->of_offset
,
76 "clock-freq-min-max", minmax
, 2);
78 ret
= add_dwmci(host
, minmax
[1], minmax
[0]);
82 upriv
->mmc
= host
->mmc
;
87 static const struct udevice_id rockchip_dwmmc_ids
[] = {
88 { .compatible
= "rockchip,rk3288-dw-mshc" },
92 U_BOOT_DRIVER(rockchip_dwmmc_drv
) = {
93 .name
= "rockchip_dwmmc",
95 .of_match
= rockchip_dwmmc_ids
,
96 .ofdata_to_platdata
= rockchip_dwmmc_ofdata_to_platdata
,
97 .probe
= rockchip_dwmmc_probe
,
98 .priv_auto_alloc_size
= sizeof(struct rockchip_dwmmc_priv
),