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From: Wolfgang Grandegger <wg@grandegger•com>
To: linuxppc-dev@ozlabs•org
Cc: devicetree-discuss@ozlabs•org
Subject: [PATCH 0/8] powerpc: i2c-mpc: make I2C bus speed configurable
Date: Tue, 31 Mar 2009 14:37:27 +0200	[thread overview]
Message-ID: <20090331123727.853787299@denx.de> (raw)

Following (most of) Grant's suggestions to my RFC:

http://ozlabs.org/pipermail/linuxppc-dev/2009-March/069820.html

this new patch series now uses:

- the I2c node property "fsl,preserve-clocking" to overtake the
  clock settings from the boot loader. The first patch provides this
  feature and can be applied *without* delay. This rest will take
  more time and discussion, I'm afraid :-(.

- the OF match table to define the I2C clock properties, especially
  the source clock pre-scaler:

  static const struct of_device_id mpc_i2c_of_match[] = {
	{.compatible = "fsl,mpc5200b-i2c",
	 .data = (void *)FSL_I2C_DEV_CLOCK_5200, },
	{.compatible = "fsl,mpc5200-i2c",
	 .data = (void *)FSL_I2C_DEV_CLOCK_5200, },
	{.compatible = "fsl,mpc8313-i2c",
	 .data = (void *)FSL_I2C_DEV_SEPARATE_DFSRR, },
	{.compatible = "fsl,mpc8543-i2c",
	 .data = (void *)(FSL_I2C_DEV_SEPARATE_DFSRR |
			  FSL_I2C_DEV_CLOCK_DIV2), },
	{.compatible = "fsl,mpc8544-i2c",
	 .data = (void *)(FSL_I2C_DEV_SEPARATE_DFSRR |
			  FSL_I2C_DEV_CLOCK_DIV23), },
	/* Backward compatibility */
	{.compatible = "fsl-i2c", },
	{},
  };

  The "data" field defines the relevant I2C flags.

- arch-specific tables and functions to get the proper Freqency
  Divider Register (fdr). I added them to sysdev/fsl_soc.c for
  the MPC8xxx and to platforms/52xx/mpc52xx_common.c for the
  MPC52xx. This also solves the problem with arch-specific
  functions, e.g. for getting the bus frequency.

- dev_dbg() and dev_info() to profit from a more descriptive output.

Hope this solution is OK now?

Thanks,

Wolfgang.

next             reply	other threads:[~2009-03-31 12:37 UTC|newest]

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-03-31 12:37 Wolfgang Grandegger [this message]
2009-03-31 12:37 ` [PATCH 1/8] [PATCH 3/4] powerpc/85xx: Move gianfar mdio nodes under the Wolfgang Grandegger
2009-03-31 12:37 ` [PATCH 2/8] [PATCH 01/28] RTC: Add support for RX8025 chip Wolfgang Grandegger
2009-03-31 12:37 ` [PATCH 3/8] powerpc/85xx: Add support for the "socrates" board (MPC8544) Wolfgang Grandegger
2009-03-31 15:57   ` Grant Likely
2009-03-31 19:20     ` Wolfgang Grandegger
2009-03-31 12:37 ` [PATCH 4/8] powerpc: i2c-mpc: preserve I2C clocking Wolfgang Grandegger
2009-03-31 12:37 ` [PATCH 5/8] powerpc: i2c-mpc: make I2C bus speed configurable Wolfgang Grandegger
2009-03-31 15:41   ` Grant Likely
2009-04-01  7:51     ` Wolfgang Grandegger
2009-04-01 13:30       ` Grant Likely
2009-04-01 13:41         ` Wolfgang Grandegger
2009-04-01 13:55           ` Wolfgang Grandegger
2009-04-01 13:55           ` Grant Likely
2009-04-02  6:55             ` Wolfgang Grandegger
2009-03-31 12:37 ` [PATCH 6/8] --- arch/powerpc/boot/dts/socrates.dts | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) Wolfgang Grandegger
2009-03-31 23:04   ` David Gibson
2009-04-01  7:31     ` Wolfgang Grandegger
2009-04-01 11:09       ` David Gibson
2009-04-01 11:59         ` Wolfgang Grandegger
2009-04-01 23:57           ` David Gibson
2009-04-01 12:30         ` Anton Vorontsov
2009-04-01 23:58           ` David Gibson
2009-03-31 12:37 ` [PATCH 7/8] Re: [PATCH 1/2] NAND: Add support for oob size 128 Wolfgang Grandegger
2009-03-31 12:37 ` [PATCH 8/8] NAND: Add support for NAND on the Socrates board Wolfgang Grandegger
2009-03-31 12:49 ` [PATCH 0/8] powerpc: i2c-mpc: make I2C bus speed configurable Wolfgang Grandegger
2009-03-31 16:23   ` Grant Likely

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