diff options
| author | Shawn Lin <shawn.lin@rock-chips.com> | 2018-03-26 17:26:25 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-08-03 07:55:24 +0200 |
| commit | de3466cc154e398f3e8de6b2139aadf8651eb03a (patch) | |
| tree | c284253046c2e35560a3c8136d2913df3c1ba23d /drivers | |
| parent | 575aa79d55a65bd2b0485836196d05a7041cb68d (diff) | |
mmc: dw_mmc: update actual clock for mmc debugfs
[ Upstream commit ff178981bd5fd1667f373098740cb1c6d6efa1ba ]
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>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
| -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 1a1501fde010..e10a00d0d44d 100644 --- a/drivers/mmc/host/dw_mmc.c +++ b/drivers/mmc/host/dw_mmc.c @@ -1164,6 +1164,8 @@ 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); @@ -1209,6 +1211,8 @@ 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; |