mirror of https://gitee.com/openkylin/linux.git
703aae3d09
For debugging power management features it is convenient to have the possibility of changing the MMC host controller clock at runtime. This patch adds a 'clock' file for this under the MMC host root of debugfs. Usage is as follows: # cat /sys/kernel/debug/mmc0/clock 52000000 # echo "1000000000" > /sys/kernel/debug/mmc0/clock # cat /sys/kernel/debug/mmc0/clock 52000000 # echo "48000000" > /sys/kernel/debug/mmc0/clock # cat /sys/kernel/debug/mmc0/clock 48000000 The middle example shows limits being applied by the host driver. Signed-off-by: Andy Shevchenko <ext-andriy.shevchenko@nokia.com> Cc: Adrian Hunter <adrian.hunter@nokia.com> [cjb: modify changelog language] Signed-off-by: Chris Ball <cjb@laptop.org> |
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| .. | ||
| Kconfig | ||
| Makefile | ||
| bus.c | ||
| bus.h | ||
| core.c | ||
| core.h | ||
| debugfs.c | ||
| host.c | ||
| host.h | ||
| mmc.c | ||
| mmc_ops.c | ||
| mmc_ops.h | ||
| sd.c | ||
| sd.h | ||
| sd_ops.c | ||
| sd_ops.h | ||
| sdio.c | ||
| sdio_bus.c | ||
| sdio_bus.h | ||
| sdio_cis.c | ||
| sdio_cis.h | ||
| sdio_io.c | ||
| sdio_irq.c | ||
| sdio_ops.c | ||
| sdio_ops.h | ||