mutexes can sleep and therefore should not be taken while holding a
spinlock. move clk_get_rate (can sleep) outside the spinlock protected
region.
This regression was introduced with commit
Date: Mon Nov 21 12:07:16 2016 +0530
mmc: sdhci-msm: Update DLL reset sequence
SDCC core with minor version >= 0x42 introduced new 14lpp
DLL. This has additional requirements in the reset sequence
for DLL tuning. Make necessary changes as needed.
Fixes: 83736352e0ca ("mmc: sdhci-msm: Update DLL reset sequence")
Cc: [email protected]
Signed-off-by: Jorge Ramirez-Ortiz <[email protected]>
---
drivers/mmc/host/sdhci-msm.c | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)
diff --git a/drivers/mmc/host/sdhci-msm.c b/drivers/mmc/host/sdhci-msm.c
index 5fc76a1993d0..9cf14b359c14 100644
--- a/drivers/mmc/host/sdhci-msm.c
+++ b/drivers/mmc/host/sdhci-msm.c
@@ -575,11 +575,14 @@ static int msm_init_cm_dll(struct sdhci_host *host)
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
struct sdhci_msm_host *msm_host = sdhci_pltfm_priv(pltfm_host);
int wait_cnt = 50;
- unsigned long flags;
+ unsigned long flags, xo_clk = 0;
u32 config;
const struct sdhci_msm_offset *msm_offset =
msm_host->offset;
+ if (msm_host->use_14lpp_dll_reset && !IS_ERR_OR_NULL(msm_host->xo_clk))
+ xo_clk = clk_get_rate(msm_host->xo_clk);
+
spin_lock_irqsave(&host->lock, flags);
/*
@@ -627,10 +630,10 @@ static int msm_init_cm_dll(struct sdhci_host *host)
config &= CORE_FLL_CYCLE_CNT;
if (config)
mclk_freq = DIV_ROUND_CLOSEST_ULL((host->clock * 8),
- clk_get_rate(msm_host->xo_clk));
+ xo_clk);
else
mclk_freq = DIV_ROUND_CLOSEST_ULL((host->clock * 4),
- clk_get_rate(msm_host->xo_clk));
+ xo_clk);
config = readl_relaxed(host->ioaddr +
msm_offset->core_dll_config_2);
--
2.21.0
