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| author | Paul Walmsley <paul@pwsan.com> | 2012-12-30 10:31:52 -0700 |
|---|---|---|
| committer | Paul Walmsley <paul@pwsan.com> | 2013-02-06 13:48:14 -0700 |
| commit | 1e3d8fe771881de323396aaa1efd20243fa974cb (patch) | |
| tree | 807c1087c8fbe7c9ebad721d1fabb40147613f16 /arch/arm/mach-omap2/omap_hwmod_2420_data.c | |
| parent | db27c0c0d05cafc0eb0bed4d58daea65ed5e6839 (diff) | |
| download | olio-linux-3.10-1e3d8fe771881de323396aaa1efd20243fa974cb.tar.xz olio-linux-3.10-1e3d8fe771881de323396aaa1efd20243fa974cb.zip | |
ARM: OMAP2420: hwmod data/PM: use hwmod to block WFI when I2C active
Use the HWMOD_BLOCK_WFI flag in the hwmod data to prevent the MPU from
entering WFI when the I2C devices are active. No idea why this is needed;
this could certainly bear further investigation if anyone is interested.
The objective here is to remove some custom code from the OMAP24xx PM
code.
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Cc: Kevin Hilman <khilman@deeprootsystems.com>
Diffstat (limited to 'arch/arm/mach-omap2/omap_hwmod_2420_data.c')
| -rw-r--r-- | arch/arm/mach-omap2/omap_hwmod_2420_data.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/arch/arm/mach-omap2/omap_hwmod_2420_data.c b/arch/arm/mach-omap2/omap_hwmod_2420_data.c index b5efe58c0be..6a764af6c6d 100644 --- a/arch/arm/mach-omap2/omap_hwmod_2420_data.c +++ b/arch/arm/mach-omap2/omap_hwmod_2420_data.c @@ -121,7 +121,12 @@ static struct omap_hwmod omap2420_i2c1_hwmod = { }, .class = &i2c_class, .dev_attr = &i2c_dev_attr, - .flags = HWMOD_16BIT_REG, + /* + * From mach-omap2/pm24xx.c: "Putting MPU into the WFI state + * while a transfer is active seems to cause the I2C block to + * timeout. Why? Good question." + */ + .flags = (HWMOD_16BIT_REG | HWMOD_BLOCK_WFI), }; /* I2C2 */ |