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avr32: some mmc/sd cleanups

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Minor cleanups for the MMC/SD support on avr32:

 - Make at32_add_device_mci() properly initialize "missing"
   platform data ... so boards like STK1002 won't try GPIO 0.

 - Switch over to gpio_is_valid() instead of testing for only
   one designated value.

 - Provide STK1002 platform data for the unlikely case that
   switches are set so first Ethernet controller isn't in use.
   (That's the only way to get card detect and writeprotect
   switch sensing on the STK1000.)

And get rid of one "unused variable" warning.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
This commit is contained in:
David Brownell
2008-07-27 02:34:45 -07:00
committed by Haavard Skinnemoen
parent eda3d8f560
commit 3c26e17032
3 changed files with 33 additions and 15 deletions
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16
drivers/mmc/host/atmel-mci.c
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@@ -12,6 +12,7 @@
#include <linux/debugfs.h>
#include <linux/device.h>
#include <linux/err.h>
#include <linux/gpio.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
@@ -28,7 +29,6 @@
#include <asm/unaligned.h>
#include <asm/arch/board.h>
#include <asm/arch/gpio.h>
#include "atmel-mci-regs.h"
@@ -574,7 +574,7 @@ static int atmci_get_ro(struct mmc_host *mmc)
int read_only = 0;
struct atmel_mci *host = mmc_priv(mmc);
if (host->wp_pin >= 0) {
if (gpio_is_valid(host->wp_pin)) {
read_only = gpio_get_value(host->wp_pin);
dev_dbg(&mmc->class_dev, "card is %s\n",
read_only ? "read-only" : "read-write");
@@ -636,7 +636,7 @@ static void atmci_detect_change(unsigned long data)
* been freed.
*/
smp_rmb();
if (host->detect_pin < 0)
if (!gpio_is_valid(host->detect_pin))
return;
enable_irq(gpio_to_irq(host->detect_pin));
@@ -1051,7 +1051,7 @@ static int __init atmci_probe(struct platform_device *pdev)
/* Assume card is present if we don't have a detect pin */
host->present = 1;
if (host->detect_pin >= 0) {
if (gpio_is_valid(host->detect_pin)) {
if (gpio_request(host->detect_pin, "mmc_detect")) {
dev_dbg(&mmc->class_dev, "no detect pin available\n");
host->detect_pin = -1;
@@ -1059,7 +1059,7 @@ static int __init atmci_probe(struct platform_device *pdev)
host->present = !gpio_get_value(host->detect_pin);
}
}
if (host->wp_pin >= 0) {
if (gpio_is_valid(host->wp_pin)) {
if (gpio_request(host->wp_pin, "mmc_wp")) {
dev_dbg(&mmc->class_dev, "no WP pin available\n");
host->wp_pin = -1;
@@ -1070,7 +1070,7 @@ static int __init atmci_probe(struct platform_device *pdev)
mmc_add_host(mmc);
if (host->detect_pin >= 0) {
if (gpio_is_valid(host->detect_pin)) {
setup_timer(&host->detect_timer, atmci_detect_change,
(unsigned long)host);
@@ -1113,7 +1113,7 @@ static int __exit atmci_remove(struct platform_device *pdev)
if (host) {
/* Debugfs stuff is cleaned up by mmc core */
if (host->detect_pin >= 0) {
if (gpio_is_valid(host->detect_pin)) {
int pin = host->detect_pin;
/* Make sure the timer doesn't enable the interrupt */
@@ -1133,7 +1133,7 @@ static int __exit atmci_remove(struct platform_device *pdev)
mci_readl(host, SR);
clk_disable(host->mck);
if (host->wp_pin >= 0)
if (gpio_is_valid(host->wp_pin))
gpio_free(host->wp_pin);
free_irq(platform_get_irq(pdev, 0), host->mmc);