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mmc: core: Convert into an enum for the poweroff-type for eMMC

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Currently we are only distinguishing between the suspend and the shutdown
scenarios, which make a bool sufficient as in-parameter to the various PM
functions for eMMC. However, to prepare for adding support for another
scenario in a subsequent change, let's convert into using an enum.

Suggested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Link: https://lore.kernel.org/r/20250407152759.25160-4-ulf.hansson@linaro.org
This commit is contained in:
Ulf Hansson 2025-04-07 17:27:53 +02:00
parent fa34c940e8
commit 900ef53558
1 changed files with 19 additions and 11 deletions
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30
drivers/mmc/core/mmc.c
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@ -33,6 +33,11 @@
#define MIN_CACHE_EN_TIMEOUT_MS 1600
#define CACHE_FLUSH_TIMEOUT_MS 30000 /* 30s */
enum mmc_poweroff_type {
MMC_POWEROFF_SUSPEND,
MMC_POWEROFF_SHUTDOWN,
};
static const unsigned int tran_exp[] = {
10000, 100000, 1000000, 10000000,
0, 0, 0, 0
@ -2015,15 +2020,16 @@ static bool mmc_can_poweroff_notify(const struct mmc_card *card)
}
static bool mmc_host_can_poweroff_notify(const struct mmc_host *host,
bool is_suspend)
enum mmc_poweroff_type pm_type)
{
if (host->caps2 & MMC_CAP2_FULL_PWR_CYCLE)
return true;
if (host->caps2 & MMC_CAP2_FULL_PWR_CYCLE_IN_SUSPEND && is_suspend)
if (host->caps2 & MMC_CAP2_FULL_PWR_CYCLE_IN_SUSPEND &&
pm_type == MMC_POWEROFF_SUSPEND)
return true;
return !is_suspend;
return pm_type == MMC_POWEROFF_SHUTDOWN;
}
static int mmc_poweroff_notify(struct mmc_card *card, unsigned int notify_type)
@ -2120,11 +2126,13 @@ static int _mmc_flush_cache(struct mmc_host *host)
return err;
}
static int _mmc_suspend(struct mmc_host *host, bool is_suspend)
static int _mmc_suspend(struct mmc_host *host, enum mmc_poweroff_type pm_type)
{
unsigned int notify_type = EXT_CSD_POWER_OFF_SHORT;
int err = 0;
unsigned int notify_type = is_suspend ? EXT_CSD_POWER_OFF_SHORT :
EXT_CSD_POWER_OFF_LONG;
if (pm_type == MMC_POWEROFF_SHUTDOWN)
notify_type = EXT_CSD_POWER_OFF_LONG;
mmc_claim_host(host);
@ -2136,7 +2144,7 @@ static int _mmc_suspend(struct mmc_host *host, bool is_suspend)
goto out;
if (mmc_can_poweroff_notify(host->card) &&
mmc_host_can_poweroff_notify(host, is_suspend))
mmc_host_can_poweroff_notify(host, pm_type))
err = mmc_poweroff_notify(host->card, notify_type);
else if (mmc_can_sleep(host->card))
err = mmc_sleep(host);
@ -2159,7 +2167,7 @@ static int mmc_suspend(struct mmc_host *host)
{
int err;
err = _mmc_suspend(host, true);
err = _mmc_suspend(host, MMC_POWEROFF_SUSPEND);
if (!err) {
pm_runtime_disable(&host->card->dev);
pm_runtime_set_suspended(&host->card->dev);
@ -2203,11 +2211,11 @@ static int mmc_shutdown(struct mmc_host *host)
* us to send the preferred poweroff-notification cmd at shutdown.
*/
if (mmc_can_poweroff_notify(host->card) &&
!mmc_host_can_poweroff_notify(host, true))
!mmc_host_can_poweroff_notify(host, MMC_POWEROFF_SUSPEND))
err = _mmc_resume(host);
if (!err)
err = _mmc_suspend(host, false);
err = _mmc_suspend(host, MMC_POWEROFF_SHUTDOWN);
return err;
}
@ -2231,7 +2239,7 @@ static int mmc_runtime_suspend(struct mmc_host *host)
if (!(host->caps & MMC_CAP_AGGRESSIVE_PM))
return 0;
err = _mmc_suspend(host, true);
err = _mmc_suspend(host, MMC_POWEROFF_SUSPEND);
if (err)
pr_err("%s: error %d doing aggressive suspend\n",
mmc_hostname(host), err);