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author | Sascha Hauer <s.hauer@pengutronix.de> | 2013-03-08 10:14:05 +0100 |
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committer | Sascha Hauer <s.hauer@pengutronix.de> | 2013-03-08 11:33:26 +0100 |
commit | a2063d101598686490ce990e74dd20c72c309720 (patch) | |
tree | 30ced9fd1ed3980645f94884e972a243007bfed7 /drivers/ata | |
parent | d80505569d30b1856e4e96deb23522bc8babd472 (diff) | |
download | barebox-a2063d101598686490ce990e74dd20c72c309720.tar.gz barebox-a2063d101598686490ce990e74dd20c72c309720.tar.xz |
ata: add ata logical device to defer probe
ata device usually take a long time to spin up, so it makes sense
to only spend this time when the device is actually used.
This adds a logical ata device and attaches a 'probe' parameter
to it, similar to what MMC does.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'drivers/ata')
-rw-r--r-- | drivers/ata/disk_ata_drive.c | 57 |
1 files changed, 49 insertions, 8 deletions
diff --git a/drivers/ata/disk_ata_drive.c b/drivers/ata/disk_ata_drive.c index 923be9a26c..a6deb7437a 100644 --- a/drivers/ata/disk_ata_drive.c +++ b/drivers/ata/disk_ata_drive.c @@ -255,17 +255,11 @@ static struct block_device_ops ata_ops = { #endif }; -/** - * Register an ATA drive behind an IDE like interface - * @param dev The interface device - * @param io ATA register file description - * @return 0 on success - */ -int ata_port_register(struct ata_port *port) +static int ata_port_init(struct ata_port *port) { int rc; struct ata_port_operations *ops = port->ops; - struct device_d *dev = port->dev; + struct device_d *dev = &port->class_dev; port->id = dma_alloc(SECTOR_SIZE); @@ -325,6 +319,53 @@ on_error: return rc; } +static int ata_set_probe(struct device_d *class_dev, struct param_d *param, + const char *val) +{ + struct ata_port *port = container_of(class_dev, struct ata_port, class_dev); + int ret, probe; + + if (port->initialized) { + dev_info(class_dev, "already initialized\n"); + return 0; + } + + probe = !!simple_strtoul(val, NULL, 0); + if (!probe) + return 0; + + ret = ata_port_init(port); + if (ret) + return ret; + + port->initialized = 1; + + return dev_param_set_generic(class_dev, param, "1"); +} + +/** + * Register an ATA drive behind an IDE like interface + * @param dev The interface device + * @param io ATA register file description + * @return 0 on success + */ +int ata_port_register(struct ata_port *port) +{ + int ret; + + port->class_dev.id = DEVICE_ID_DYNAMIC; + strcpy(port->class_dev.name, "ata"); + port->class_dev.parent = port->dev; + + ret = register_device(&port->class_dev); + if (ret) + return ret; + + dev_add_param(&port->class_dev, "probe", ata_set_probe, NULL, 0); + + return ret; +} + /** * @file * @brief Generic ATA disk drive support |