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memory: brcmstb: dpfe: introduce is_dcpu_enabled() 

In order to check whether or not the DCPU is running, we introduce
a function called is_dcpu_enabled().

Signed-off-by: Markus Mayer <mmayer@broadcom.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
This commit is contained in:
Markus Mayer 2017-10-02 16:13:46 -07:00 committed by Florian Fainelli
parent 0e9b114132
commit d56e746f4b
1 changed files with 15 additions and 6 deletions
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21
drivers/memory/brcmstb_dpfe.c
View File

@ -202,17 +202,26 @@ static const u32 dpfe_commands[DPFE_CMD_MAX][MSG_FIELD_MAX] = {
},
};
static bool is_dcpu_enabled(void __iomem *regs)
{
u32 val;
val = readl_relaxed(regs + REG_DCPU_RESET);
return !(val & DCPU_RESET_MASK);
}
static void __disable_dcpu(void __iomem *regs)
{
u32 val;
/* Check if DCPU is running */
if (!is_dcpu_enabled(regs))
return;
/* Put DCPU in reset if it's running. */
val = readl_relaxed(regs + REG_DCPU_RESET);
if (!(val & DCPU_RESET_MASK)) {
/* Put DCPU in reset */
val |= (1 << DCPU_RESET_SHIFT);
writel_relaxed(val, regs + REG_DCPU_RESET);
}
val |= (1 << DCPU_RESET_SHIFT);
writel_relaxed(val, regs + REG_DCPU_RESET);
}
static void __enable_dcpu(void __iomem *regs)