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| author | Pawel Moll <pawel.moll@arm.com> | 2012-09-18 12:24:57 +0100 |
|---|---|---|
| committer | Pawel Moll <pawel.moll@arm.com> | 2012-11-05 17:09:49 +0000 |
| commit | 88e0abcd7a8171ca7af3402373e7bd81fe9b6754 (patch) | |
| tree | f7aa8edd71dc9115c634e527b425e14cffc18dd6 /include | |
| parent | 3ecbf05be159a95e1d23ba9b3b21c5bc2941ba6b (diff) | |
| download | linux-stable-88e0abcd7a8171ca7af3402373e7bd81fe9b6754.tar.gz linux-stable-88e0abcd7a8171ca7af3402373e7bd81fe9b6754.tar.bz2 linux-stable-88e0abcd7a8171ca7af3402373e7bd81fe9b6754.zip | |
mfd: Versatile Express system registers driver
This is a platform driver for Versatile Express' "system
register" block. It's a random collection of registers providing
the following functionality:
- low level platform functions like board ID access; in order to
use those, the driver must be initialized early, either statically
or based on the DT
- config bus bridge via "system control" interface; as the response
from the controller does not generate interrupt (yet), the status
register is periodically polled using a timer
- pseudo GPIO lines providing MMC card status and Flash WP#
signal control
- LED interface for a set of 8 LEDs on the motherboard, with
"heartbeat", "mmc0" and "cpu0" to "cpu5" as default triggers
Signed-off-by: Pawel Moll <pawel.moll@arm.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/vexpress.h | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/include/linux/vexpress.h b/include/linux/vexpress.h index c2d877a7b691..09c81d7a22de 100644 --- a/include/linux/vexpress.h +++ b/include/linux/vexpress.h @@ -24,6 +24,17 @@ #define VEXPRESS_CONFIG_STATUS_DONE 0 #define VEXPRESS_CONFIG_STATUS_WAIT 1 +#define VEXPRESS_GPIO_MMC_CARDIN 0 +#define VEXPRESS_GPIO_MMC_WPROT 1 +#define VEXPRESS_GPIO_FLASH_WPn 2 + +#define VEXPRESS_RES_FUNC(_site, _func) \ +{ \ + .start = (_site), \ + .end = (_func), \ + .flags = IORESOURCE_BUS, \ +} + /* Config bridge API */ /** @@ -82,4 +93,18 @@ int vexpress_config_read(struct vexpress_config_func *func, int offset, int vexpress_config_write(struct vexpress_config_func *func, int offset, u32 data); +/* Platform control */ + +u32 vexpress_get_procid(int site); +u32 vexpress_get_hbi(int site); +void *vexpress_get_24mhz_clock_base(void); +void vexpress_flags_set(u32 data); + +#define vexpress_get_site_by_node(node) __vexpress_get_site(NULL, node) +#define vexpress_get_site_by_dev(dev) __vexpress_get_site(dev, NULL) +unsigned __vexpress_get_site(struct device *dev, struct device_node *node); + +void vexpress_sysreg_early_init(void __iomem *base); +void vexpress_sysreg_of_early_init(void); + #endif |