brain-hackers_pepepper-mirror/u-boot-brain
1
0
Fork 0
mirror of https://github.com/brain-hackers/u-boot-brain synced 2024-10-02 09:30:43 +09:00
Code Issues Projects Releases Wiki Activity

ARM: tegra: add function to enable input clamping on tristate

Browse Source 
The HW-defined procedure for booting Tegra requires that
CLAMP_INPUTS_WHEN_TRISTATED be enabled before programming the pinmux.
Add a function to the pinmux driver to allow boards to do this.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Tom Warren <twarren@nvidia.com>
This commit is contained in:
Stephen Warren 2014-04-22 14:37:54 -06:00 committed by Tom Warren
parent eceb3f26f4
commit bb14469ae0
2 changed files with 21 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
arch/arm/cpu/tegra-common/pinmux-common.c
View File

@ -86,6 +86,22 @@
#define IO_RESET_SHIFT 8
#define RCV_SEL_SHIFT 9
#if !defined(CONFIG_TEGRA20) && !defined(CONFIG_TEGRA30)
/* This register/field only exists on Tegra114 and later */
#define APB_MISC_PP_PINMUX_GLOBAL_0 0x40
#define CLAMP_INPUTS_WHEN_TRISTATED 1
void pinmux_set_tristate_input_clamping(void)
{
u32 *reg = _R(APB_MISC_PP_PINMUX_GLOBAL_0);
u32 val;
val = readl(reg);
val |= CLAMP_INPUTS_WHEN_TRISTATED;
writel(val, reg);
}
#endif
void pinmux_set_func(enum pmux_pingrp pin, enum pmux_func func)
{
u32 *reg = MUX_REG(pin);

5
arch/arm/include/asm/arch-tegra/pinmux.h
View File

@ -80,6 +80,11 @@ struct pmux_pingrp_config {
#endif
};
#if !defined(CONFIG_TEGRA20) && !defined(CONFIG_TEGRA30)
/* Set the pinmux CLAMP_INPUTS_WHEN_TRISTATED bit */
void pinmux_set_tristate_input_clamping(void);
#endif
/* Set the mux function for a pin group */
void pinmux_set_func(enum pmux_pingrp pin, enum pmux_func func);