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Commit ac26309a authored by Phani Kumar Uppalapati's avatar Phani Kumar Uppalapati
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drivers: mfd: Mark ANC coefficients registers as volatile 



Mark ANC (Active Noise Cancellation) filter coefficients
as volatile because codec hardware can auto update the
registers based on coefficient pointer register update.

Change-Id: I65aef7d7322db0ab3815d69e19cb97c7a2e044b2
Signed-off-by: default avatarPhani Kumar Uppalapati <phaniu@codeaurora.org>
parent 6f524acc

drivers/mfd/wcd9335-regmap.c

+7 −0
Original line number Diff line number Diff line
@@ -1327,6 +1327,13 @@ static bool wcd9335_is_volatile_register(struct device *dev, unsigned int reg) 
	    (reg <= WCD9335_CDC_SIDETONE_IIR1_IIR_COEF_B2_CTL))

		return true;



	if ((reg >= WCD9335_CDC_ANC0_IIR_COEFF_1_CTL) &&

	    (reg <= WCD9335_CDC_ANC0_IIR_COEFF_2_CTL))

		return true;



	if ((reg >= WCD9335_CDC_ANC1_IIR_COEFF_1_CTL) &&

	    (reg <= WCD9335_CDC_ANC1_IIR_COEFF_2_CTL))

		return true;

	/*

	 * CPE inbox and outbox registers are volatile

	 * since they can be updated in the codec hardware