Commit b3894f26 authored by Boris BREZILLON's avatar Boris BREZILLON Committed by Chris Ball

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
......@@ -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);
......
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