From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jens Gehrlein <sew_s@tqs.de>
Date: Tue, 08 Jul 2008 10:55:48 +0200
Subject: [U-Boot-Users] [PATCH 07/10] [ARM] TQMA31: adjust voltage
 regulators in PMIC MC13738
In-Reply-To: <486E6BC6.9020706@gmail.com>
References: <20080704144552.12049.55374.stgit@tq-sewsrv-4.tq-net.de>
	<20080704145011.12049.75795.stgit@tq-sewsrv-4.tq-net.de>
	<486E6BC6.9020706@gmail.com>
Message-ID: <48732B94.9040101@tqs.de>
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To: u-boot@lists.denx.de

Hi Magnus,

Magnus Lilja schrieb:
> Hi,
> 
> Jens Gehrlein wrote:
>> +static int adjust_voltages (void)
>> +{
>> +	u32 reg;
>> +	u32 val;
>> +	static struct spi_slave *slave = NULL;
>> +
>> +	slave = spi_setup_slave(1, 0, 1000000,
>> +		SPI_MODE_2 | SPI_CS_HIGH);
>> +	if (!slave)
>> +		return -1;
>> +
>> +	if (spi_claim_bus(slave))
>> +		return -1;
>> +
>> +	/* Set PMIC arbitration switchers */
>> +	val = 0x000020;
>> +	reg = 0x14000000 | val | 0x80000000;
> 
> It seems like it's time to create a MC13783 header file containing some helper macros and symbolic names to the 13783's registers so we can write:
> reg = MC13783_READ_CMD(MC_REG_FOO);
> ...
> val = something_symbolic | something_symbolic2;
> reg = MC13783_WRITE_CMD(MC_REG_FOO, val);
> ...
> etc..
> 
> 
> Also, I'm pretty sure some other i.MX31 boards could benefit from changing some voltages in U-boot so perhaps we could have a mc13783-reg.c (-reg as in regulators) file containing stuff like mc13783_set_regulator(MC_VRFDIG, VRFDIG_1V8)?

Basically, I agree. But would you accept the current patch for now? The 
new routines and macros later could be implemented later.

Kind regards,
Jens