openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

Revert "mmc: tmio: fix reset operation" 

This reverts commit a87852c6b8. It did fix
the issue, but was building on top of already wrong assumptions. The
driver missed that 'hw_reset' was only for resetting remote HW (card)
and not for the IP core. Since we fixed that in a previous patch, we can
now remove this patch to make it clear that 'reset' is for resetting the
IP core only. Also, cancelling DMA will only be called when actually
needed again. It will also allow for further cleanups and better
readability. Note that in addition to the revert, the call in
'tmio_mmc_execute_tuning' will be converted, too, to maintain the
current behaviour.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Tested-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Link: https://lore.kernel.org/r/20200820132538.24758-3-wsa+renesas@sang-engineering.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Wolfram Sang 2020-08-20 15:25:34 +02:00 committed by Ulf Hansson
parent 6e7d4de108
commit 34e3211e54
1 changed files with 13 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

29
drivers/mmc/host/tmio_mmc_core.c
View File

@ -178,18 +178,6 @@ static void tmio_mmc_reset(struct tmio_mmc_host *host)
}
}
static void tmio_mmc_hw_reset(struct mmc_host *mmc)
{
struct tmio_mmc_host *host = mmc_priv(mmc);
host->reset(host);
tmio_mmc_abort_dma(host);
if (host->hw_reset)
host->hw_reset(host);
}
static void tmio_mmc_reset_work(struct work_struct *work)
{
struct tmio_mmc_host *host = container_of(work, struct tmio_mmc_host,
@ -228,11 +216,12 @@ static void tmio_mmc_reset_work(struct work_struct *work)
spin_unlock_irqrestore(&host->lock, flags);
tmio_mmc_hw_reset(host->mmc);
host->reset(host);
/* Ready for new calls */
host->mrq = NULL;
tmio_mmc_abort_dma(host);
mmc_request_done(host->mmc, mrq);
}
@ -720,6 +709,14 @@ static int tmio_mmc_start_data(struct tmio_mmc_host *host,
return 0;
}
static void tmio_mmc_hw_reset(struct mmc_host *mmc)
{
struct tmio_mmc_host *host = mmc_priv(mmc);
if (host->hw_reset)
host->hw_reset(host);
}
static int tmio_mmc_execute_tuning(struct mmc_host *mmc, u32 opcode)
{
struct tmio_mmc_host *host = mmc_priv(mmc);
@ -732,7 +729,7 @@ static int tmio_mmc_execute_tuning(struct mmc_host *mmc, u32 opcode)
if (ret < 0) {
dev_warn(&host->pdev->dev, "Tuning procedure failed\n");
tmio_mmc_hw_reset(mmc);
host->reset(host);
}
return ret;
@ -1180,7 +1177,7 @@ int tmio_mmc_host_probe(struct tmio_mmc_host *_host)
_host->sdio_irq_mask = TMIO_SDIO_MASK_ALL;
_host->set_clock(_host, 0);
tmio_mmc_hw_reset(mmc);
_host->reset(_host);
_host->sdcard_irq_mask = sd_ctrl_read16_and_16_as_32(_host, CTL_IRQ_MASK);
tmio_mmc_disable_mmc_irqs(_host, TMIO_MASK_ALL);
@ -1283,7 +1280,7 @@ int tmio_mmc_host_runtime_resume(struct device *dev)
struct tmio_mmc_host *host = dev_get_drvdata(dev);
tmio_mmc_clk_enable(host);
tmio_mmc_hw_reset(host->mmc);
host->reset(host);
if (host->clk_cache)
host->set_clock(host, host->clk_cache);