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Commit b3894f26 authored by Boris Brezillon's avatar Boris Brezillon Committed by Chris Ball
Browse files

mmc: atmel-mci: prepare clk before calling enable 



Replace clk_enable/disable with clk_prepare_enable/disable_unprepare to
avoid common clk framework warnings.

Signed-off-by: default avatarBoris BREZILLON <b.brezillon@overkiz.com>
Acked-by: default avatarLudovic Desroches <ludovic.desroches@atmel.com>
Signed-off-by: default avatarChris Ball <cjb@laptop.org>
parent 77776fd0

drivers/mmc/host/atmel-mci.c

+27 −7
Original line number Diff line number Diff line
@@ -378,6 +378,8 @@ static int atmci_regs_show(struct seq_file *s, void *v) 
{

	struct atmel_mci	*host = s->private;

	u32			*buf;

	int			ret = 0;





	buf = kmalloc(ATMCI_REGS_SIZE, GFP_KERNEL);

	if (!buf)
@@ -388,12 +390,16 @@ static int atmci_regs_show(struct seq_file *s, void *v) 
	 * not disabling interrupts, so IMR and SR may not be

	 * consistent.

	 */

	ret = clk_prepare_enable(host->mck);

	if (ret)

		goto out;



	spin_lock_bh(&host->lock);

	clk_enable(host->mck);

	memcpy_fromio(buf, host->regs, ATMCI_REGS_SIZE);

	clk_disable(host->mck);

	spin_unlock_bh(&host->lock);



	clk_disable_unprepare(host->mck);



	seq_printf(s, "MR:\t0x%08x%s%s ",

			buf[ATMCI_MR / 4],

			buf[ATMCI_MR / 4] & ATMCI_MR_RDPROOF ? " RDPROOF" : "",
@@ -442,9 +448,10 @@ static int atmci_regs_show(struct seq_file *s, void *v) 
				val & ATMCI_CFG_LSYNC ? " LSYNC" : "");

	}



out:

	kfree(buf);



	return 0;

	return ret;

}



static int atmci_regs_open(struct inode *inode, struct file *file)
@@ -1262,6 +1269,7 @@ static void atmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) 
	struct atmel_mci_slot	*slot = mmc_priv(mmc);

	struct atmel_mci	*host = slot->host;

	unsigned int		i;

	bool			unprepare_clk;



	slot->sdc_reg &= ~ATMCI_SDCBUS_MASK;

	switch (ios->bus_width) {
@@ -1277,9 +1285,13 @@ static void atmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) 
		unsigned int clock_min = ~0U;

		u32 clkdiv;



		clk_prepare(host->mck);

		unprepare_clk = true;



		spin_lock_bh(&host->lock);

		if (!host->mode_reg) {

			clk_enable(host->mck);

			unprepare_clk = false;

			atmci_writel(host, ATMCI_CR, ATMCI_CR_SWRST);

			atmci_writel(host, ATMCI_CR, ATMCI_CR_MCIEN);

			if (host->caps.has_cfg_reg)
@@ -1347,6 +1359,8 @@ static void atmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) 
	} else {

		bool any_slot_active = false;



		unprepare_clk = false;



		spin_lock_bh(&host->lock);

		slot->clock = 0;

		for (i = 0; i < ATMCI_MAX_NR_SLOTS; i++) {
@@ -1360,12 +1374,16 @@ static void atmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) 
			if (host->mode_reg) {

				atmci_readl(host, ATMCI_MR);

				clk_disable(host->mck);

				unprepare_clk = true;

			}

			host->mode_reg = 0;

		}

		spin_unlock_bh(&host->lock);

	}



	if (unprepare_clk)

		clk_unprepare(host->mck);



	switch (ios->power_mode) {

	case MMC_POWER_UP:

		set_bit(ATMCI_CARD_NEED_INIT, &slot->flags);
@@ -2376,10 +2394,12 @@ static int __init atmci_probe(struct platform_device *pdev) 
	if (!host->regs)

		goto err_ioremap;



	clk_enable(host->mck);

	ret = clk_prepare_enable(host->mck);

	if (ret)

		goto err_request_irq;

	atmci_writel(host, ATMCI_CR, ATMCI_CR_SWRST);

	host->bus_hz = clk_get_rate(host->mck);

	clk_disable(host->mck);

	clk_disable_unprepare(host->mck);



	host->mapbase = regs->start;
@@ -2482,11 +2502,11 @@ static int __exit atmci_remove(struct platform_device *pdev) 
			atmci_cleanup_slot(host->slot[i], i);

	}



	clk_enable(host->mck);

	clk_prepare_enable(host->mck);

	atmci_writel(host, ATMCI_IDR, ~0UL);

	atmci_writel(host, ATMCI_CR, ATMCI_CR_MCIDIS);

	atmci_readl(host, ATMCI_SR);

	clk_disable(host->mck);

	clk_disable_unprepare(host->mck);



	if (host->dma.chan)

		dma_release_channel(host->dma.chan);