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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>
This commit is contained in:
Simon Glass 2012-01-11 12:42:24 +00:00 committed by Albert ARIBAUD
parent 2faf1863de
commit 8a1133c607
2 changed files with 47 additions and 0 deletions
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40
arch/arm/cpu/armv7/tegra2/funcmux.c
View File

@ -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;

7
arch/arm/include/asm/arch-tegra2/funcmux.h
View File

@ -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,
};
/**