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| System | : | Linux MiraNet 3.0.0-14-generic-pae #23-Ubuntu SMP Mon Nov 21 22:07:10 UTC 2011 i686 |
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| Software | : | Apache. PHP/5.3.6-13ubuntu3.10 |
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| ID | : | uid=65534(nobody) gid=65534(nogroup) groups=65534(nogroup)
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| Safe Mode | : | OFF |
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| Freespace | : | 22.62 GB of 70.42 GB (32.12%) |
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MySQL: ON MSSQL: OFF Oracle: OFF PostgreSQL: OFF Curl: OFF Sockets: ON Fetch: OFF Wget: ON Perl: ON |
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Disabled Functions: pcntl_alarm,pcntl_fork,pcntl_waitpid,pcntl_wait,pcntl_wifexited,pcntl_wifstopped,pcntl_wifsignaled,pcntl_wexitstatus,pcntl_wtermsig,pcntl_wstopsig,pcntl_signal,pcntl_signal_dispatch,pcntl_get_last_error,pcntl_strerror,pcntl_sigprocmask,pcntl_sigwaitinfo,pcntl_sigtimedwait,pcntl_exec,pcntl_getpriority,pcntl_setpriority,
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/
usr/
src/
linux-headers-3.0.0-14/
include/
linux/
spi/
- drwxr-xr-x
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Viewing file:  spi_gpio.h (2.51 KB) -rw-r--r--Select action/file-type:  ( +) |  ( +) |  ( +) | Code ( +) | Session ( +) |  ( +) | SDB ( +) |  ( +) |  ( +) |  ( +) |  ( +) |  ( +) |
#ifndef __LINUX_SPI_GPIO_H
#define __LINUX_SPI_GPIO_H
/*
* For each bitbanged SPI bus, set up a platform_device node with:
* - name "spi_gpio"
* - id the same as the SPI bus number it implements
* - dev.platform data pointing to a struct spi_gpio_platform_data
*
* Or, see the driver code for information about speedups that are
* possible on platforms that support inlined access for GPIOs (no
* spi_gpio_platform_data is used).
*
* Use spi_board_info with these busses in the usual way, being sure
* that the controller_data being the GPIO used for each device's
* chipselect:
*
* static struct spi_board_info ... [] = {
* ...
* // this slave uses GPIO 42 for its chipselect
* .controller_data = (void *) 42,
* ...
* // this one uses GPIO 86 for its chipselect
* .controller_data = (void *) 86,
* ...
* };
*
* If chipselect is not used (there's only one device on the bus), assign
* SPI_GPIO_NO_CHIPSELECT to the controller_data:
* .controller_data = (void *) SPI_GPIO_NO_CHIPSELECT;
*
* If the MISO or MOSI pin is not available then it should be set to
* SPI_GPIO_NO_MISO or SPI_GPIO_NO_MOSI.
*
* If the bitbanged bus is later switched to a "native" controller,
* that platform_device and controller_data should be removed.
*/
#define SPI_GPIO_NO_CHIPSELECT ((unsigned long)-1l)
#define SPI_GPIO_NO_MISO ((unsigned long)-1l)
#define SPI_GPIO_NO_MOSI ((unsigned long)-1l)
/**
* struct spi_gpio_platform_data - parameter for bitbanged SPI master
* @sck: number of the GPIO used for clock output
* @mosi: number of the GPIO used for Master Output, Slave In (MOSI) data
* @miso: number of the GPIO used for Master Input, Slave Output (MISO) data
* @num_chipselect: how many slaves to allow
*
* All GPIO signals used with the SPI bus managed through this driver
* (chipselects, MOSI, MISO, SCK) must be configured as GPIOs, instead
* of some alternate function.
*
* It can be convenient to use this driver with pins that have alternate
* functions associated with a "native" SPI controller if a driver for that
* controller is not available, or is missing important functionality.
*
* On platforms which can do so, configure MISO with a weak pullup unless
* there's an external pullup on that signal. That saves power by avoiding
* floating signals. (A weak pulldown would save power too, but many
* drivers expect to see all-ones data as the no slave "response".)
*/
struct spi_gpio_platform_data {
unsigned sck;
unsigned mosi;
unsigned miso;
u16 num_chipselect;
};
#endif /* __LINUX_SPI_GPIO_H */
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