diff options
| author | Shawn Lin <shawn.lin@rock-chips.com> | 2018-03-26 12:26:25 +0300 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2018-05-02 16:08:29 +0300 |
| commit | ff178981bd5fd1667f373098740cb1c6d6efa1ba (patch) | |
| tree | 871f916b15b072a7d547a488d70ce215294a2d52 /drivers/mmc/host/dw_mmc.c | |
| parent | 486e6661367b40f927aadbed73237693396cbf94 (diff) | |
| download | linux-ff178981bd5fd1667f373098740cb1c6d6efa1ba.tar.xz | |
mmc: dw_mmc: update actual clock for mmc debugfs
Respect the actual clock for mmc debugfs to help better debug
the hardware.
mmc_host mmc0: Bus speed (slot 0) = 135475200Hz (slot req 150000000Hz,
actual 135475200HZ div = 0)
cat /sys/kernel/debug/mmc0/ios
clock: 150000000 Hz
actual clock: 135475200 Hz
vdd: 21 (3.3 ~ 3.4 V)
bus mode: 2 (push-pull)
chip select: 0 (don't care)
power mode: 2 (on)
bus width: 3 (8 bits)
timing spec: 9 (mmc HS200)
signal voltage: 0 (1.80 V)
driver type: 0 (driver type B)
Cc: Xiao Yao <xiaoyao@rock-chips.com>
Cc: Ziyuan <xzy.xu@rock-chips.com>
Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc/host/dw_mmc.c')
| -rw-r--r-- | drivers/mmc/host/dw_mmc.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c index 29a1afa81f66..623f4d27fa01 100644 --- a/drivers/mmc/host/dw_mmc.c +++ b/drivers/mmc/host/dw_mmc.c @@ -1230,6 +1230,8 @@ static void dw_mci_setup_bus(struct dw_mci_slot *slot, bool force_clkinit) if (host->state == STATE_WAITING_CMD11_DONE) sdmmc_cmd_bits |= SDMMC_CMD_VOLT_SWITCH; + slot->mmc->actual_clock = 0; + if (!clock) { mci_writel(host, CLKENA, 0); mci_send_cmd(slot, sdmmc_cmd_bits, 0); @@ -1288,6 +1290,8 @@ static void dw_mci_setup_bus(struct dw_mci_slot *slot, bool force_clkinit) /* keep the last clock value that was requested from core */ slot->__clk_old = clock; + slot->mmc->actual_clock = div ? ((host->bus_hz / div) >> 1) : + host->bus_hz; } host->current_speed = clock; |