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| author | Aaron Durbin <adurbin@chromium.org> | 2013-11-14 16:28:37 -0600 |
|---|---|---|
| committer | chrome-internal-fetch <chrome-internal-fetch@google.com> | 2013-11-15 01:39:42 +0000 |
| commit | 83ec930b36b1e36a534e818659c78abfbed8a87d (patch) | |
| tree | 9a52eb89cd82d53619663a7939e92a932ec94e78 | |
| parent | 4b59746600936bfec377e19a01e5ccb90e6e1c48 (diff) | |
| download | chrome-ec-83ec930b36b1e36a534e818659c78abfbed8a87d.tar.gz | |
lm4: allow the lpc module to use GPIO for SCI
The LPC module has a dedicated control for SCI#.
However, certain situations require a dedicated
GPIO for asserting the SCI# signal.
Introduce CONFIG_SCI_GPIO to meet this requirement.
BUG=chrome-os-partner:24003
BRANCH=None
TEST=Built and booted rambi with dependency change. 'lidclose' and
'lidopen' cause ACPI interrupts.
Change-Id: I34c5f0ba5ff60151972921f251c71d3769a9ef8b
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/176804
Reviewed-by: Randall Spangler <rspangler@chromium.org>
| -rw-r--r-- | chip/lm4/lpc.c | 6 | ||||
| -rw-r--r-- | include/config.h | 3 |
2 files changed, 9 insertions, 0 deletions
diff --git a/chip/lm4/lpc.c b/chip/lm4/lpc.c index 7bfcc35dd0..610517571c 100644 --- a/chip/lm4/lpc.c +++ b/chip/lm4/lpc.c @@ -141,7 +141,13 @@ static void lpc_generate_smi(void) */ static void lpc_generate_sci(void) { +#ifdef CONFIG_SCI_GPIO + gpio_set_level(CONFIG_SCI_GPIO, 0); + udelay(65); + gpio_set_level(CONFIG_SCI_GPIO, 1); +#else LM4_LPC_LPCCTL |= LM4_LPC_SCI_START; +#endif if (host_events & event_mask[LPC_HOST_EVENT_SCI]) CPRINTF("[%T sci 0x%08x]\n", diff --git a/include/config.h b/include/config.h index 002d509def..3167e00d8c 100644 --- a/include/config.h +++ b/include/config.h @@ -588,6 +588,9 @@ */ #undef CONFIG_SAVE_VBOOT_HASH +/* Allow the board to use a GPIO for the SCI# signal. */ +#undef CONFIG_SCI_GPIO + /* Support SPI interfaces */ #undef CONFIG_SPI |