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mmc: msm_sdcc: Add gpio handling function to driver

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Configure SDCC GPIOs when the host is powered up or powered off.

Signed-off-by: Sahitya Tummala <stummala@codeaurora.org>
This commit is contained in:
Sahitya Tummala
2011-01-18 11:22:49 +05:30
committed by David Brown
parent 727a99a576
commit 7a89248a47
3 changed files with 51 additions and 1 deletions
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40
drivers/mmc/host/msm_sdcc.c
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@@ -36,6 +36,7 @@
#include <linux/io.h>
#include <linux/memory.h>
#include <linux/gfp.h>
#include <linux/gpio.h>
#include <asm/cacheflush.h>
#include <asm/div64.h>
@@ -941,6 +942,38 @@ msmsdcc_request(struct mmc_host *mmc, struct mmc_request *mrq)
spin_unlock_irqrestore(&host->lock, flags);
}
static void msmsdcc_setup_gpio(struct msmsdcc_host *host, bool enable)
{
struct msm_mmc_gpio_data *curr;
int i, rc = 0;
if (!host->plat->gpio_data && host->gpio_config_status == enable)
return;
curr = host->plat->gpio_data;
for (i = 0; i < curr->size; i++) {
if (enable) {
rc = gpio_request(curr->gpio[i].no,
curr->gpio[i].name);
if (rc) {
pr_err("%s: gpio_request(%d, %s) failed %d\n",
mmc_hostname(host->mmc),
curr->gpio[i].no,
curr->gpio[i].name, rc);
goto free_gpios;
}
} else {
gpio_free(curr->gpio[i].no);
}
}
host->gpio_config_status = enable;
return;
free_gpios:
for (; i >= 0; i--)
gpio_free(curr->gpio[i].no);
}
static void
msmsdcc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
{
@@ -953,6 +986,8 @@ msmsdcc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
msmsdcc_enable_clocks(host);
spin_unlock_irqrestore(&host->lock, flags);
if (ios->clock) {
if (ios->clock != host->clk_rate) {
rc = clk_set_rate(host->clk, ios->clock);
@@ -979,9 +1014,11 @@ msmsdcc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
switch (ios->power_mode) {
case MMC_POWER_OFF:
msmsdcc_setup_gpio(host, false);
break;
case MMC_POWER_UP:
pwr |= MCI_PWR_UP;
msmsdcc_setup_gpio(host, true);
break;
case MMC_POWER_ON:
pwr |= MCI_PWR_ON;
@@ -998,9 +1035,10 @@ msmsdcc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
msmsdcc_writel(host, pwr, MMCIPOWER);
}
#if BUSCLK_PWRSAVE
spin_lock_irqsave(&host->lock, flags);
msmsdcc_disable_clocks(host, 1);
#endif
spin_unlock_irqrestore(&host->lock, flags);
#endif
}
static void msmsdcc_enable_sdio_irq(struct mmc_host *mmc, int enable)