diff options
| author | Linus Walleij <linus.walleij@stericsson.com> | 2010-04-08 10:39:38 +0400 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2010-04-14 19:08:18 +0400 |
| commit | 808d97ccbe8e8251b1435e86c762965fd7e8a75e (patch) | |
| tree | b45e594937a226c4d346240f9d3387c4cd8e5b8a /include | |
| parent | 771dc157e06d69fcece0b2c8a29b9010345d8e9a (diff) | |
| download | linux-808d97ccbe8e8251b1435e86c762965fd7e8a75e.tar.xz | |
ARM: 6033/1: ARM: MMCI: pass max frequency from platform
This introduce the field f_max into the mmci_platform_data,
making it possible to pass in a desired block clocking frequency
from a board configuration. This is often more desirable than
using a module parameter. We keep the module parameter as a
fallback as well as the default frequency specified for this
parameter if a parameter is not provided.
This also adds some kerneldoc style documentation to the
platform data struct in mmci.h.
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/amba/mmci.h | 23 |
1 files changed, 22 insertions, 1 deletions
diff --git a/include/linux/amba/mmci.h b/include/linux/amba/mmci.h index 6b4241748dda..7e466fe72025 100644 --- a/include/linux/amba/mmci.h +++ b/include/linux/amba/mmci.h @@ -6,8 +6,29 @@ #include <linux/mmc/host.h> +/** + * struct mmci_platform_data - platform configuration for the MMCI + * (also known as PL180) block. + * @f_max: the maximum operational frequency for this host in this + * platform configuration. When this is specified it takes precedence + * over the module parameter for the same frequency. + * @ocr_mask: available voltages on the 4 pins from the block, this + * is ignored if a regulator is used, see the MMC_VDD_* masks in + * mmc/host.h + * @translate_vdd: a callback function to translate a MMC_VDD_* + * mask into a value to be binary or:ed and written into the + * MMCIPWR register of the block + * @status: if no GPIO read function was given to the block in + * gpio_wp (below) this function will be called to determine + * whether a card is present in the MMC slot or not + * @gpio_wp: read this GPIO pin to see if the card is write protected + * @gpio_cd: read this GPIO pin to detect card insertion + * @capabilities: the capabilities of the block as implemented in + * this platform, signify anything MMC_CAP_* from mmc/host.h + */ struct mmci_platform_data { - unsigned int ocr_mask; /* available voltages */ + unsigned int f_max; + unsigned int ocr_mask; u32 (*translate_vdd)(struct device *, unsigned int); unsigned int (*status)(struct device *); int gpio_wp; |