808d97ccbe
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>
40 lines
1.3 KiB
C
40 lines
1.3 KiB
C
/*
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* include/linux/amba/mmci.h
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*/
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#ifndef AMBA_MMCI_H
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#define AMBA_MMCI_H
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#include <linux/mmc/host.h>
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/**
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* struct mmci_platform_data - platform configuration for the MMCI
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* (also known as PL180) block.
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* @f_max: the maximum operational frequency for this host in this
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* platform configuration. When this is specified it takes precedence
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* over the module parameter for the same frequency.
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* @ocr_mask: available voltages on the 4 pins from the block, this
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* is ignored if a regulator is used, see the MMC_VDD_* masks in
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* mmc/host.h
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* @translate_vdd: a callback function to translate a MMC_VDD_*
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* mask into a value to be binary or:ed and written into the
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* MMCIPWR register of the block
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* @status: if no GPIO read function was given to the block in
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* gpio_wp (below) this function will be called to determine
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* whether a card is present in the MMC slot or not
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* @gpio_wp: read this GPIO pin to see if the card is write protected
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* @gpio_cd: read this GPIO pin to detect card insertion
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* @capabilities: the capabilities of the block as implemented in
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* this platform, signify anything MMC_CAP_* from mmc/host.h
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*/
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struct mmci_platform_data {
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unsigned int f_max;
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unsigned int ocr_mask;
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u32 (*translate_vdd)(struct device *, unsigned int);
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unsigned int (*status)(struct device *);
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int gpio_wp;
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int gpio_cd;
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unsigned long capabilities;
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};
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#endif
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