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s3cmci: add better support for no card detect or write protect available

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Add better support for omitting either the card detect or the write
protect GPIOs if the board does not support it.  Add the fields
no_wprotect and no_detect to the platform data which when set indicate the
absence of the respective GPIOs.

Note, this also fixes a minor bug where it tries to free IRQ0 if there is
no detect gpio available.

Signed-off-by: Ben Dooks <ben@simtec.co.uk>
Cc: <linux-mmc@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Ben Dooks 2009-10-01 15:44:21 -07:00 committed by Linus Torvalds
parent 5a2c4fe04d
commit 00acfaeead
2 changed files with 26 additions and 20 deletions
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2
arch/arm/plat-s3c24xx/include/plat/mci.h
View file

@ -2,6 +2,8 @@
#define _ARCH_MCI_H
struct s3c24xx_mci_pdata {
unsigned int no_wprotect : 1;
unsigned int no_detect : 1;
unsigned int wprotect_invert : 1;
unsigned int detect_invert : 1; /* set => detect active high. */
unsigned int use_dma : 1;

44
drivers/mmc/host/s3cmci.c
View file

@ -1299,7 +1299,7 @@ static int s3cmci_get_ro(struct mmc_host *mmc)
struct s3c24xx_mci_pdata *pdata = host->pdata;
int ret;
if (pdata->gpio_wprotect == 0)
if (pdata->no_wprotect)
return 0;
ret = s3c2410_gpio_getpin(pdata->gpio_wprotect);
@ -1647,30 +1647,34 @@ static int __devinit s3cmci_probe(struct platform_device *pdev)
disable_irq(host->irq);
host->irq_state = false;
if (host->pdata->gpio_detect) {
if (!host->pdata->no_detect) {
ret = gpio_request(host->pdata->gpio_detect, "s3cmci detect");
if (ret) {
dev_err(&pdev->dev, "failed to get detect gpio\n");
goto probe_free_irq;
}
}
host->irq_cd = s3c2410_gpio_getirq(host->pdata->gpio_detect);
host->irq_cd = s3c2410_gpio_getirq(host->pdata->gpio_detect);
if (host->irq_cd >= 0) {
if (request_irq(host->irq_cd, s3cmci_irq_cd,
IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
DRIVER_NAME, host)) {
dev_err(&pdev->dev, "can't get card detect irq.\n");
ret = -ENOENT;
goto probe_free_gpio_cd;
if (host->irq_cd >= 0) {
if (request_irq(host->irq_cd, s3cmci_irq_cd,
IRQF_TRIGGER_RISING |
IRQF_TRIGGER_FALLING,
DRIVER_NAME, host)) {
dev_err(&pdev->dev,
"can't get card detect irq.\n");
ret = -ENOENT;
goto probe_free_gpio_cd;
}
} else {
dev_warn(&pdev->dev,
"host detect has no irq available\n");
gpio_direction_input(host->pdata->gpio_detect);
}
} else {
dev_warn(&pdev->dev, "host detect has no irq available\n");
gpio_direction_input(host->pdata->gpio_detect);
}
} else
host->irq_cd = -1;
if (host->pdata->gpio_wprotect) {
if (!host->pdata->no_wprotect) {
ret = gpio_request(host->pdata->gpio_wprotect, "s3cmci wp");
if (ret) {
dev_err(&pdev->dev, "failed to get writeprotect\n");
@ -1774,11 +1778,11 @@ static int __devinit s3cmci_probe(struct platform_device *pdev)
s3c2410_dma_free(host->dma, &s3cmci_dma_client);
probe_free_gpio_wp:
if (host->pdata->gpio_wprotect)
if (!host->pdata->no_wprotect)
gpio_free(host->pdata->gpio_wprotect);
probe_free_gpio_cd:
if (host->pdata->gpio_detect)
if (!host->pdata->no_detect)
gpio_free(host->pdata->gpio_detect);
probe_free_irq_cd:
@ -1837,10 +1841,10 @@ static int __devexit s3cmci_remove(struct platform_device *pdev)
free_irq(host->irq, host);
if (pd->gpio_wprotect)
if (!pd->no_wprotect)
gpio_free(pd->gpio_wprotect);
if (pd->gpio_detect)
if (!pd->no_detect)
gpio_free(pd->gpio_detect);
for (i = S3C2410_GPE(5); i <= S3C2410_GPE(10); i++)