Mirrors/u-boot
2
0
Fork 0
mirror of https://github.com/AsahiLinux/u-boot synced 2024-11-28 23:51:33 +00:00
Code Issues Projects Releases Packages Wiki Activity

EXYNOS5: FDT: Add DWMMC device node data

Browse source 
This patch adds DWMMC device node data for exynos5.
This patch also adds binding file for DWMMC device node.

Signed-off-by: Vivek Gautam <gautam.vivek@samsung.com>
Signed-off-by: Amar <amarendra.xt@samsung.com>
Acked-by: Jaehoon Chung <jh80.chung@samsung.com>
Acked-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
This commit is contained in:
Amar 2013-04-27 11:42:53 +05:30 committed by Minkyu Kang
parent 45a4d4d35a
commit 07eb5f9ce7
3 changed files with 111 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

33
arch/arm/dts/exynos5250.dtsi
View file

@ -169,4 +169,37 @@
#address-cells = <1>;
#size-cells = <1>;
};
mmc@12200000 {
#address-cells = <1>;
#size-cells = <0>;
compatible = "samsung,exynos5250-dwmmc";
reg = <0x12200000 0x1000>;
interrupts = <0 75 0>;
};
mmc@12210000 {
#address-cells = <1>;
#size-cells = <0>;
compatible = "samsung,exynos5250-dwmmc";
reg = <0x12210000 0x1000>;
interrupts = <0 76 0>;
};
mmc@12220000 {
#address-cells = <1>;
#size-cells = <0>;
compatible = "samsung,exynos5250-dwmmc";
reg = <0x12220000 0x1000>;
interrupts = <0 77 0>;
};
mmc@12230000 {
#address-cells = <1>;
#size-cells = <0>;
compatible = "samsung,exynos5250-dwmmc";
reg = <0x12230000 0x1000>;
interrupts = <0 78 0>;
};
};

24
board/samsung/dts/exynos5250-smdk5250.dts
View file

@ -30,6 +30,10 @@
spi2 = "/spi@12d40000";
spi3 = "/spi@131a0000";
spi4 = "/spi@131b0000";
mmc0 = "/mmc@12200000";
mmc1 = "/mmc@12210000";
mmc2 = "/mmc@12220000";
mmc3 = "/mmc@12230000";
};
sromc@12250000 {
@ -119,4 +123,24 @@
samsung,ycbcr-coeff = <0>;
samsung,color-depth = <1>;
};
mmc@12200000 {
samsung,bus-width = <8>;
samsung,timing = <1 3 3>;
samsung,removable = <0>;
};
mmc@12210000 {
status = "disabled";
};
mmc@12220000 {
samsung,bus-width = <4>;
samsung,timing = <1 2 3>;
samsung,removable = <1>;
};
mmc@12230000 {
status = "disabled";
};
};

54
doc/device-tree-bindings/exynos/dwmmc.txt Normal file
View file

@ -0,0 +1,54 @@
* Exynos 5250 DWC_mobile_storage
The Exynos 5250 provides DWC_mobile_storage interface which supports
. Embedded Multimedia Cards (EMMC-version 4.5)
. Secure Digital memory (SD mem-version 2.0)
. Secure Digital I/O (SDIO-version 3.0)
. Consumer Electronics Advanced Transport Architecture (CE-ATA-version 1.1)
The Exynos 5250 DWC_mobile_storage provides four channels.
SOC specific and Board specific properties are channel specific.
Required SoC Specific Properties:
- compatible: should be
- samsung,exynos5250-dwmmc: for exynos5250 platforms
- reg: physical base address of the controller and length of memory mapped
region.
- interrupts: The interrupt number to the cpu.
Required Board Specific Properties:
- #address-cells: should be 1.
- #size-cells: should be 0.
- samsung,bus-width: The width of the bus used to interface the devices
supported by DWC_mobile_storage (SD-MMC/EMMC/SDIO).
. Typically the bus width is 4 or 8.
- samsung,timing: The timing values to be written into the
Drv/sample clock selection register of corresponding channel.
. It is comprised of 3 values corresponding to the 3 fileds
'SelClk_sample', 'SelClk_drv' and 'DIVRATIO' of CLKSEL register.
. SelClk_sample: Select sample clock among 8 shifted clocks.
. SelClk_drv: Select drv clock among 8 shifted clocks.
. DIVRATIO: Clock Divide ratio select.
. The above 3 values are used by the clock phase shifter.
Example:
mmc@12200000 {
samsung,bus-width = <8>;
samsung,timing = <1 3 3>;
samsung,removable = <1>;
}
In the above example,
. The bus width is 8
. Timing is comprised of 3 values as explained below
1 - SelClk_sample
3 - SelClk_drv
3 - DIVRATIO
. The 'removable' flag indicates whether the the particilar device
cannot be removed (always present) or it is a removable device.
1 - Indicates that the device is removable.
0 - Indicates that the device cannot be removed.