1 * Exynos 5250 DWC_mobile_storage
3 The Exynos 5250 provides DWC_mobile_storage interface which supports
4 . Embedded Multimedia Cards (EMMC-version 4.5)
5 . Secure Digital memory (SD mem-version 2.0)
6 . Secure Digital I/O (SDIO-version 3.0)
7 . Consumer Electronics Advanced Transport Architecture (CE-ATA-version 1.1)
9 The Exynos 5250 DWC_mobile_storage provides four channels.
10 SOC specific and Board specific properties are channel specific.
12 Required SoC Specific Properties:
14 - compatible: should be
15 - samsung,exynos5250-dwmmc: for exynos5250 platforms
17 - reg: physical base address of the controller and length of memory mapped
20 - interrupts: The interrupt number to the cpu.
22 Required Board Specific Properties:
24 - #address-cells: should be 1.
25 - #size-cells: should be 0.
26 - samsung,bus-width: The width of the bus used to interface the devices
27 supported by DWC_mobile_storage (SD-MMC/EMMC/SDIO).
28 . Typically the bus width is 4 or 8.
29 - samsung,timing: The timing values to be written into the
30 Drv/sample clock selection register of corresponding channel.
31 . It is comprised of 3 values corresponding to the 3 fileds
32 'SelClk_sample', 'SelClk_drv' and 'DIVRATIO' of CLKSEL register.
33 . SelClk_sample: Select sample clock among 8 shifted clocks.
34 . SelClk_drv: Select drv clock among 8 shifted clocks.
35 . DIVRATIO: Clock Divide ratio select.
36 . The above 3 values are used by the clock phase shifter.
41 samsung,bus-width = <8>;
42 samsung,timing = <1 3 3>;
43 samsung,removable = <1>;
47 . Timing is comprised of 3 values as explained below
51 . The 'removable' flag indicates whether the the particilar device
52 cannot be removed (always present) or it is a removable device.
53 1 - Indicates that the device is removable.
54 0 - Indicates that the device cannot be removed.