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armv7/pit: Setup EC on SPI2.

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The Embedded Controller (EC) for Pit is connected via SPI2, and needs to be
configured before we can talk to it.

Change-Id: I1f8e921b4616f15951f3e5fae1ecbf116de4ba90
Signed-off-by: Hung-Te Lin <hungte@chromium.org>
Signed-off-by: Gabe Black <gabeblack@chromium.org>
Reviewed-on: http://review.coreboot.org/3707
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
This commit is contained in:
Hung-Te Lin 2013-06-24 20:02:01 +08:00 committed by Stefan Reinauer
parent e42030d236
commit c357aed3d7
1 changed files with 9 additions and 0 deletions
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9
src/mainboard/google/pit/romstage.c
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@ -122,6 +122,14 @@ static void setup_storage(void)
exynos_pinmux_sdmmc2(); exynos_pinmux_sdmmc2();
} }
static void setup_ec(void)
{
/* SPI2 (EC) is slower and needs to work in half-duplex mode with
* single byte bus width. */
clock_set_rate(PERIPH_ID_SPI2, 500000);
exynos_pinmux_spi2();
}
static void setup_graphics(void) static void setup_graphics(void)
{ {
exynos_pinmux_dphpd(); exynos_pinmux_dphpd();
@ -271,6 +279,7 @@ void main(void)
setup_storage(); setup_storage();
setup_gpio(); setup_gpio();
setup_graphics(); setup_graphics();
setup_ec();
simple_spi_test(); simple_spi_test();
/* Set SPI (primary CBFS media) clock to 50MHz. */ /* Set SPI (primary CBFS media) clock to 50MHz. */