linux-kernel - Re: [alsa-devel] [PATCH] ASoC: da7210: Add support for PLL and SRM

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Message-ID: <20120413093012.GK3168@opensource.wolfsonmicro.com>
Date:	Fri, 13 Apr 2012 10:30:12 +0100
From:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
To:	Ashish Chavan <ashish.chavan@...tcummins.com>
Cc:	lrg <lrg@...com>, alsa-devel <alsa-devel@...a-project.org>,
	David Dajun Chen <david.chen@...semi.com>,
	"kuninori.morimoto.gx" <kuninori.morimoto.gx@...esas.com>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [alsa-devel] [PATCH] ASoC: da7210: Add support for PLL and SRM

On Wed, Apr 11, 2012 at 10:58:40AM +0530, Ashish Chavan wrote:

> +/* PLL dividers table */
> +static const struct pll_div da7210_pll_div[] = {
> +	/* for MASTER mode, fs = 44.1Khz */
> +	{ 12000000, 0xE8, 0x6C, 0x2, },		/* MCLK=12Mhz */
> +	{ 13000000, 0xDF, 0x28, 0xC, },		/* MCLK=13Mhz */
> +	{ 13500000, 0xDB, 0x0A, 0xD, },		/* MCLK=13.5Mhz */
> +	{ 14400000, 0xD4, 0x5A, 0x2, },		/* MCLK=14.4Mhz */
> +	{ 19200000, 0xBB, 0x43, 0x9, },		/* MCLK=19.2Mhz */
> +	{ 19680000, 0xB9, 0x6D, 0xA, },		/* MCLK=19.68Mhz */
> +	{ 19800000, 0xB8, 0xFB, 0xB, },		/* MCLK=19.8Mhz */
> +	/* for MASTER mode, fs = 48Khz */
> +	{ 12000000, 0xF3, 0x12, 0x7, },		/* MCLK=12Mhz */

This *still* has magic number problems.

> +	if (da7210->master) {
> +		/* In PLL master mode, use master mode PLL dividers */
> +		switch (fout) {
> +		case 2822400:
> +			row_idx = MASTER_2822400_DIV_OFFSET;
> +			break;
> +		case 3072000:
> +			row_idx = MASTER_3072000_DIV_OFFSET;
> +			break;

These defines now need to be kept in sync with the table and are going
to be *very* painful to review.

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