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libertas: if_spi: add ability to call board specific setup/teardown methods

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In certain cases it is required to perform board specific actions
before activating libertas G-SPI interface. These actions may include
power up of the chip, GPIOs setup, proper pin-strapping and SPI
controller config.
This patch adds ability to call board specific setup/teardown methods

Signed-off-by: Mike Rapoport <mike@compulab.co.il>
Acked-by: Andrey Yurovsky <andrey@cozybit.com>
Acked-by: Dan Williams <dcbw@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Mike Rapoport 2009-02-03 09:04:20 +02:00 committed by John W. Linville
parent d43e87868f
commit 0c2bec9694
2 changed files with 22 additions and 0 deletions
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15
drivers/net/wireless/libertas/if_spi.c
View File

@ -42,6 +42,7 @@ struct if_spi_packet {
struct if_spi_card {
struct spi_device *spi;
struct lbs_private *priv;
struct libertas_spi_platform_data *pdata;
char helper_fw_name[FIRMWARE_NAME_MAX];
char main_fw_name[FIRMWARE_NAME_MAX];
@ -1022,6 +1023,17 @@ static int __devinit if_spi_probe(struct spi_device *spi)
lbs_deb_enter(LBS_DEB_SPI);
if (!pdata) {
err = -EINVAL;
goto out;
}
if (pdata->setup) {
err = pdata->setup(spi);
if (err)
goto out;
}
/* Allocate card structure to represent this specific device */
card = kzalloc(sizeof(struct if_spi_card), GFP_KERNEL);
if (!card) {
@ -1029,6 +1041,7 @@ static int __devinit if_spi_probe(struct spi_device *spi)
goto out;
}
spi_set_drvdata(spi, card);
card->pdata = pdata;
card->spi = spi;
card->gpio_cs = pdata->gpio_cs;
card->prev_xfer_time = jiffies;
@ -1158,6 +1171,8 @@ static int __devexit libertas_spi_remove(struct spi_device *spi)
if_spi_terminate_spi_thread(card);
lbs_remove_card(priv); /* will call free_netdev */
gpio_free(card->gpio_cs);
if (card->pdata->teardown)
card->pdata->teardown(spi);
free_if_spi_card(card);
lbs_deb_leave(LBS_DEB_SPI);
return 0;

7
include/linux/spi/libertas_spi.h
View File

@ -10,6 +10,9 @@
*/
#ifndef _LIBERTAS_SPI_H_
#define _LIBERTAS_SPI_H_
struct spi_device;
struct libertas_spi_platform_data {
/* There are two ways to read data from the WLAN module's SPI
* interface. Setting 0 or 1 here controls which one is used.
@ -21,5 +24,9 @@ struct libertas_spi_platform_data {
/* GPIO number to use as chip select */
u16 gpio_cs;
/* Board specific setup/teardown */
int (*setup)(struct spi_device *spi);
int (*teardown)(struct spi_device *spi);
};
#endif