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clk: renesas: cpg-mssr: Fix STBCR suspend/resume handling 

On SoCs with Standby Control Registers (STBCRs) instead of Module Stop
Control Registers (MSTPCRs), the suspend handler saves the wrong
registers, and the resume handler prints the wrong register in an error
message.

Fortunately this cannot happen yet, as the suspend/resume code is used
on PSCI systems only, and systems with STBCRs (RZ/A1 and RZ/A2) do not
use PSCI.  Still, it is better to fix this, to avoid this becoming a
problem in the future.

Distinguish between STBCRs and MSTPCRs where needed.  Replace the
useless printing of the virtual register address in the resume error
message by printing the register index.

Fixes: fde35c9c7d ("clk: renesas: cpg-mssr: Add R7S9210 support")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20200507074713.30113-1-geert+renesas@glider.be
This commit is contained in:
Geert Uytterhoeven 2020-05-07 09:47:13 +02:00
parent e2f022c10e
commit ace3420977
1 changed files with 5 additions and 3 deletions
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8
drivers/clk/renesas/renesas-cpg-mssr.c
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@ -818,7 +818,8 @@ static int cpg_mssr_suspend_noirq(struct device *dev)
/* Save module registers with bits under our control */
for (reg = 0; reg < ARRAY_SIZE(priv->smstpcr_saved); reg++) {
if (priv->smstpcr_saved[reg].mask)
priv->smstpcr_saved[reg].val =
priv->smstpcr_saved[reg].val = priv->stbyctrl ?
readb(priv->base + STBCR(reg)) :
readl(priv->base + SMSTPCR(reg));
}
@ -878,8 +879,9 @@ static int cpg_mssr_resume_noirq(struct device *dev)
}
if (!i)
dev_warn(dev, "Failed to enable SMSTP %p[0x%x]\n",
priv->base + SMSTPCR(reg), oldval & mask);
dev_warn(dev, "Failed to enable %s%u[0x%x]\n",
priv->stbyctrl ? "STB" : "SMSTP", reg,
oldval & mask);
}
return 0;