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| author | Simon Glass <sjg@chromium.org> | 2012-01-11 12:42:24 +0000 |
|---|---|---|
| committer | Albert ARIBAUD <albert.u.boot@aribaud.net> | 2012-02-12 10:11:22 +0100 |
| commit | 8a1133c6074716d846b941fedfd6e0654e3f4292 (patch) | |
| tree | 7c2876cd81616981a0411114547dcf8264b110d8 | |
| parent | 2faf1863de7a69c3bc687ce8dba78d29bb821082 (diff) | |
| download | u-boot-imx-8a1133c6074716d846b941fedfd6e0654e3f4292.zip u-boot-imx-8a1133c6074716d846b941fedfd6e0654e3f4292.tar.gz u-boot-imx-8a1133c6074716d846b941fedfd6e0654e3f4292.tar.bz2 | |
tegra: Add I2C support to funcmux
Add support to funcmux for selecting I2C functions and programming
the pinmux appropriately.
Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Tom Warren <twarren@nvidia.com>
| -rw-r--r-- | arch/arm/cpu/armv7/tegra2/funcmux.c | 40 | ||||
| -rw-r--r-- | arch/arm/include/asm/arch-tegra2/funcmux.h | 7 |
2 files changed, 47 insertions, 0 deletions
diff --git a/arch/arm/cpu/armv7/tegra2/funcmux.c b/arch/arm/cpu/armv7/tegra2/funcmux.c index 662ce92..4fe6e06 100644 --- a/arch/arm/cpu/armv7/tegra2/funcmux.c +++ b/arch/arm/cpu/armv7/tegra2/funcmux.c @@ -66,6 +66,46 @@ int funcmux_select(enum periph_id id, int config) } break; + case PERIPH_ID_DVC_I2C: + /* there is only one selection, pinmux_config is ignored */ + if (config == FUNCMUX_DVC_I2CP) { + pinmux_set_func(PINGRP_I2CP, PMUX_FUNC_I2C); + pinmux_tristate_disable(PINGRP_I2CP); + } + break; + + case PERIPH_ID_I2C1: + /* support pinmux_config of 0 for now, */ + if (config == FUNCMUX_I2C1_RM) { + pinmux_set_func(PINGRP_RM, PMUX_FUNC_I2C); + pinmux_tristate_disable(PINGRP_RM); + } + break; + case PERIPH_ID_I2C2: /* I2C2 */ + switch (config) { + case FUNCMUX_I2C2_DDC: /* DDC pin group, select I2C2 */ + pinmux_set_func(PINGRP_DDC, PMUX_FUNC_I2C2); + /* PTA to HDMI */ + pinmux_set_func(PINGRP_PTA, PMUX_FUNC_HDMI); + pinmux_tristate_disable(PINGRP_DDC); + break; + case FUNCMUX_I2C2_PTA: /* PTA pin group, select I2C2 */ + pinmux_set_func(PINGRP_PTA, PMUX_FUNC_I2C2); + /* set DDC_SEL to RSVDx (RSVD2 works for now) */ + pinmux_set_func(PINGRP_DDC, PMUX_FUNC_RSVD2); + pinmux_tristate_disable(PINGRP_PTA); + bad_config = 0; + break; + } + break; + case PERIPH_ID_I2C3: /* I2C3 */ + /* support pinmux_config of 0 for now */ + if (config == FUNCMUX_I2C3_DTF) { + pinmux_set_func(PINGRP_DTF, PMUX_FUNC_I2C3); + pinmux_tristate_disable(PINGRP_DTF); + } + break; + default: debug("%s: invalid periph_id %d", __func__, id); return -1; diff --git a/arch/arm/include/asm/arch-tegra2/funcmux.h b/arch/arm/include/asm/arch-tegra2/funcmux.h index 791f301..d184523 100644 --- a/arch/arm/include/asm/arch-tegra2/funcmux.h +++ b/arch/arm/include/asm/arch-tegra2/funcmux.h @@ -32,6 +32,13 @@ enum { FUNCMUX_UART1_IRRX_IRTX = 0, FUNCMUX_UART2_IRDA = 0, FUNCMUX_UART4_GMC = 0, + + /* I2C configs */ + FUNCMUX_DVC_I2CP = 0, + FUNCMUX_I2C1_RM = 0, + FUNCMUX_I2C2_DDC = 0, + FUNCMUX_I2C2_PTA, + FUNCMUX_I2C3_DTF = 0, }; /** |