2 * (C) Copyright 2016 Fuzhou Rockchip Electronics Co., Ltd
4 * Rockchip SD Host Controller Interface
6 * SPDX-License-Identifier: GPL-2.0+
17 DECLARE_GLOBAL_DATA_PTR
;
18 /* 400KHz is max freq for card ID etc. Use that as min */
19 #define EMMC_MIN_FREQ 400000
21 struct rockchip_sdhc_plat
{
22 struct mmc_config cfg
;
26 struct rockchip_sdhc
{
27 struct sdhci_host host
;
31 static int arasan_sdhci_probe(struct udevice
*dev
)
33 struct mmc_uclass_priv
*upriv
= dev_get_uclass_priv(dev
);
34 struct rockchip_sdhc_plat
*plat
= dev_get_platdata(dev
);
35 struct rockchip_sdhc
*prv
= dev_get_priv(dev
);
36 struct sdhci_host
*host
= &prv
->host
;
37 int max_frequency
, ret
;
41 max_frequency
= fdtdec_get_int(gd
->fdt_blob
, dev_of_offset(dev
),
43 ret
= clk_get_by_index(dev
, 0, &clk
);
45 ret
= clk_set_rate(&clk
, max_frequency
);
46 if (IS_ERR_VALUE(ret
))
47 printf("%s clk set rate fail!\n", __func__
);
49 printf("%s fail to get clk\n", __func__
);
52 host
->quirks
= SDHCI_QUIRK_WAIT_SEND_CMD
;
53 host
->max_clk
= max_frequency
;
55 ret
= sdhci_setup_cfg(&plat
->cfg
, host
, 0, EMMC_MIN_FREQ
);
57 host
->mmc
= &plat
->mmc
;
60 host
->mmc
->priv
= &prv
->host
;
62 upriv
->mmc
= host
->mmc
;
64 return sdhci_probe(dev
);
67 static int arasan_sdhci_ofdata_to_platdata(struct udevice
*dev
)
69 struct sdhci_host
*host
= dev_get_priv(dev
);
71 host
->name
= dev
->name
;
72 host
->ioaddr
= dev_get_addr_ptr(dev
);
77 static int rockchip_sdhci_bind(struct udevice
*dev
)
79 struct rockchip_sdhc_plat
*plat
= dev_get_platdata(dev
);
81 return sdhci_bind(dev
, &plat
->mmc
, &plat
->cfg
);
84 static const struct udevice_id arasan_sdhci_ids
[] = {
85 { .compatible
= "arasan,sdhci-5.1" },
89 U_BOOT_DRIVER(arasan_sdhci_drv
) = {
90 .name
= "arasan_sdhci",
92 .of_match
= arasan_sdhci_ids
,
93 .ofdata_to_platdata
= arasan_sdhci_ofdata_to_platdata
,
95 .bind
= rockchip_sdhci_bind
,
96 .probe
= arasan_sdhci_probe
,
97 .priv_auto_alloc_size
= sizeof(struct rockchip_sdhc
),
98 .platdata_auto_alloc_size
= sizeof(struct rockchip_sdhc_plat
),