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| author | Shawn Lin <shawn.lin@rock-chips.com> | 2017-02-17 10:59:52 +0800 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2017-04-24 21:41:06 +0200 |
| commit | bc2dcc1a2a5e3e796b71f742d6d241ba0523739b (patch) | |
| tree | 35d6910c3235562cad4f1c417321034695e5bdb7 /drivers/mmc/host/dw_mmc.c | |
| parent | 4dba18defb4c7bbea8af85913cd2dc506178389a (diff) | |
| download | lwn-bc2dcc1a2a5e3e796b71f742d6d241ba0523739b.tar.gz lwn-bc2dcc1a2a5e3e796b71f742d6d241ba0523739b.zip | |
mmc: dw_mmc: improve dw_mci_reset a bit
Too much condition iteration makes the code
less readable. Slightly improve it.
Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.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 | 38 |
1 files changed, 20 insertions, 18 deletions
diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c index 0c641fb0fe59..d0f0f658e741 100644 --- a/drivers/mmc/host/dw_mmc.c +++ b/drivers/mmc/host/dw_mmc.c @@ -1699,6 +1699,7 @@ static bool dw_mci_reset(struct dw_mci *host) { u32 flags = SDMMC_CTRL_RESET | SDMMC_CTRL_FIFO_RESET; bool ret = false; + u32 status = 0; /* * Resetting generates a block interrupt, hence setting @@ -1714,29 +1715,30 @@ static bool dw_mci_reset(struct dw_mci *host) if (dw_mci_ctrl_reset(host, flags)) { /* - * In all cases we clear the RAWINTS register to clear any - * interrupts. + * In all cases we clear the RAWINTS + * register to clear any interrupts. */ mci_writel(host, RINTSTS, 0xFFFFFFFF); - /* if using dma we wait for dma_req to clear */ - if (host->use_dma) { - u32 status; - - if (readl_poll_timeout_atomic(host->regs + SDMMC_STATUS, - status, - !(status & SDMMC_STATUS_DMA_REQ), - 1, 500 * USEC_PER_MSEC)) { - dev_err(host->dev, - "%s: Timeout waiting for dma_req to clear during reset\n", - __func__); - goto ciu_out; - } + if (!host->use_dma) { + ret = true; + goto ciu_out; + } - /* when using DMA next we reset the fifo again */ - if (!dw_mci_ctrl_reset(host, SDMMC_CTRL_FIFO_RESET)) - goto ciu_out; + /* Wait for dma_req to be cleared */ + if (readl_poll_timeout_atomic(host->regs + SDMMC_STATUS, + status, + !(status & SDMMC_STATUS_DMA_REQ), + 1, 500 * USEC_PER_MSEC)) { + dev_err(host->dev, + "%s: Timeout waiting for dma_req to be cleared\n", + __func__); + goto ciu_out; } + + /* when using DMA next we reset the fifo again */ + if (!dw_mci_ctrl_reset(host, SDMMC_CTRL_FIFO_RESET)) + goto ciu_out; } else { /* if the controller reset bit did clear, then set clock regs */ if (!(mci_readl(host, CTRL) & SDMMC_CTRL_RESET)) { |