[PATCH 30/32] omap_hsmmc: ensure all clock enables and disables are paired

Adrian Hunter
2009-07-10T12:45:12Z

>From 92159741642af71828cb664f716b098152b7a1c1 Mon Sep 17 00:00:00 2001
From: Adrian Hunter <adrian.hunter@nokia.com>
Date: Sun, 31 May 2009 19:27:36 +0300
Subject: [PATCH] omap_hsmmc: ensure all clock enables and disables are paired

Signed-off-by: Adrian Hunter <adrian.hunter@nokia.com>
---
drivers/mmc/host/omap_hsmmc.c | 26 ++++++++++++++------------
1 files changed, 14 insertions(+), 12 deletions(-)

diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c
index 2570bfe..427bd49 100644
--- a/drivers/mmc/host/omap_hsmmc.c
+++ b/drivers/mmc/host/omap_hsmmc.c
@@ -727,22 +727,24 @@ static int omap_hsmmc_switch_opcond(struct omap_hsmmc_host *host, int vdd)
/* Disable the clocks */
clk_disable(host->fclk);
clk_disable(host->iclk);
- clk_disable(host->dbclk);
+ if (host->dbclk_enabled)
+ clk_disable(host->dbclk);

/* Turn the power off */
ret = mmc_slot(host).set_power(host->dev, host->slot_id, 0, 0);
- if (ret != 0)
- goto err;

/* Turn the power ON with given VDD 1.8 or 3.0v */
- ret = mmc_slot(host).set_power(host->dev, host->slot_id, 1, vdd);
+ if (!ret)
+ ret = mmc_slot(host).set_power(host->dev, host->slot_id, 1,
+ vdd);
+ clk_enable(host->iclk);
+ if (host->dbclk_enabled)
+ clk_enable(host->dbclk);
+ clk_enable(host->fclk);
+
if (ret != 0)
goto err;

- clk_enable(host->fclk);
- clk_enable(host->iclk);
- clk_enable(host->dbclk);
-
OMAP_HSMMC_WRITE(host->base, HCTL,
OMAP_HSMMC_READ(host->base, HCTL) & SDVSCLR);
reg_val = OMAP_HSMMC_READ(host->base, HCTL);
@@ -1888,7 +1890,8 @@ static int omap_hsmmc_suspend(struct platform_device *pdev, pm_message_t state)
OMAP_HSMMC_READ(host->base, HCTL) & ~SDBP);
mmc_host_disable(host->mmc);
clk_disable(host->iclk);
- clk_disable(host->dbclk);
+ if (host->dbclk_enabled)
+ clk_disable(host->dbclk);
} else {
host->suspended = 0;
if (host->pdata->resume) {
@@ -1919,9 +1922,8 @@ static int omap_hsmmc_resume(struct platform_device *pdev)
if (ret)
goto clk_en_err;

- if (clk_enable(host->dbclk) != 0)
- dev_dbg(mmc_dev(host->mmc),
- "Enabling debounce clk failed\n");
+ if (host->dbclk_enabled)
+ clk_enable(host->dbclk);

if (mmc_host_enable(host->mmc) != 0) {
clk_disable(host->iclk);
--
1.5.6.3