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Commit 7fbc030d authored by Wolfram Sang's avatar Wolfram Sang Committed by Ulf Hansson
Browse files

mmc: tmio: always start clock after frequency calculation 



Starting the clock is always done after frequency change anyhow, so we can
do it directly after the clock calculation and remove the specific calls.
This is the first part of doing proper clock de-/activation at calculation
time.

Signed-off-by: default avatarWolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
parent 452e5eef

drivers/mmc/host/tmio_mmc_pio.c

+16 −18
Original line number Diff line number Diff line
@@ -154,6 +154,18 @@ static void tmio_mmc_enable_sdio_irq(struct mmc_host *mmc, int enable) 
	}

}



static void tmio_mmc_clk_start(struct tmio_mmc_host *host)

{

	sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, CLK_CTL_SCLKEN |

		sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL));

	msleep(host->pdata->flags & TMIO_MMC_FAST_CLK_CHG ? 1 : 10);



	if (host->pdata->flags & TMIO_MMC_HAVE_HIGH_REG) {

		sd_ctrl_write16(host, CTL_CLK_AND_WAIT_CTL, 0x0100);

		msleep(10);

	}

}



static void tmio_mmc_set_clock(struct tmio_mmc_host *host,

				unsigned int new_clock)

{
@@ -182,6 +194,8 @@ static void tmio_mmc_set_clock(struct tmio_mmc_host *host, 
	sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, clk & CLK_CTL_DIV_MASK);

	if (!(host->pdata->flags & TMIO_MMC_FAST_CLK_CHG))

		msleep(10);



	tmio_mmc_clk_start(host);

}



static void tmio_mmc_clk_stop(struct tmio_mmc_host *host)
@@ -196,18 +210,6 @@ static void tmio_mmc_clk_stop(struct tmio_mmc_host *host) 
	msleep(host->pdata->flags & TMIO_MMC_FAST_CLK_CHG ? 5 : 10);

}



static void tmio_mmc_clk_start(struct tmio_mmc_host *host)

{

	sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, CLK_CTL_SCLKEN |

		sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL));

	msleep(host->pdata->flags & TMIO_MMC_FAST_CLK_CHG ? 1 : 10);



	if (host->pdata->flags & TMIO_MMC_HAVE_HIGH_REG) {

		sd_ctrl_write16(host, CTL_CLK_AND_WAIT_CTL, 0x0100);

		msleep(10);

	}

}



static void tmio_mmc_reset(struct tmio_mmc_host *host)

{

	/* FIXME - should we set stop clock reg here */
@@ -955,14 +957,12 @@ static void tmio_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) 
		tmio_mmc_clk_stop(host);

		break;

	case MMC_POWER_UP:

		tmio_mmc_set_clock(host, ios->clock);

		tmio_mmc_power_on(host, ios->vdd);

		tmio_mmc_clk_start(host);

		tmio_mmc_set_clock(host, ios->clock);

		tmio_mmc_set_bus_width(host, ios->bus_width);

		break;

	case MMC_POWER_ON:

		tmio_mmc_set_clock(host, ios->clock);

		tmio_mmc_clk_start(host);

		tmio_mmc_set_bus_width(host, ios->bus_width);

		break;

	}
@@ -1271,10 +1271,8 @@ int tmio_mmc_host_runtime_resume(struct device *dev) 
	tmio_mmc_reset(host);

	tmio_mmc_clk_enable(host);



	if (host->clk_cache) {

	if (host->clk_cache)

		tmio_mmc_set_clock(host, host->clk_cache);

		tmio_mmc_clk_start(host);

	}



	tmio_mmc_enable_dma(host, true);