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authorShawn Lin <shawn.lin@rock-chips.com>2018-03-26 17:26:25 +0800
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2018-08-03 07:55:24 +0200
commitde3466cc154e398f3e8de6b2139aadf8651eb03a (patch)
treec284253046c2e35560a3c8136d2913df3c1ba23d
parent575aa79d55a65bd2b0485836196d05a7041cb68d (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>
-rw-r--r--drivers/mmc/host/dw_mmc.c4
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;