diff options
| author | Sahitya Tummala <stummala@codeaurora.org> | 2011-01-18 11:22:49 +0530 |
|---|---|---|
| committer | David Brown <davidb@codeaurora.org> | 2011-01-21 16:58:00 -0800 |
| commit | 7a89248a47d201e6ade2daddd79b0fd902cad400 (patch) | |
| tree | 4c430c1e5a3ffc65022ce2c7ae39c42495166900 /drivers | |
| parent | 727a99a576ba562e5074d54cfcc57a1ce101c240 (diff) | |
mmc: msm_sdcc: Add gpio handling function to driver
Configure SDCC GPIOs when the host is powered up or powered off.
Signed-off-by: Sahitya Tummala <stummala@codeaurora.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/mmc/host/msm_sdcc.c | 40 | ||||
| -rw-r--r-- | drivers/mmc/host/msm_sdcc.h | 1 |
2 files changed, 40 insertions, 1 deletions
diff --git a/drivers/mmc/host/msm_sdcc.c b/drivers/mmc/host/msm_sdcc.c index 153ab977a01..97c9b3638d5 100644 --- a/drivers/mmc/host/msm_sdcc.c +++ b/drivers/mmc/host/msm_sdcc.c @@ -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) diff --git a/drivers/mmc/host/msm_sdcc.h b/drivers/mmc/host/msm_sdcc.h index 939557af266..42d7bbc977c 100644 --- a/drivers/mmc/host/msm_sdcc.h +++ b/drivers/mmc/host/msm_sdcc.h @@ -243,6 +243,7 @@ struct msmsdcc_host { unsigned int cmd_datactrl; struct mmc_command *cmd_cmd; u32 cmd_c; + bool gpio_config_status; bool prog_scan; bool prog_enable; |