Commit 334bbb387f2d369f4cf0b28173f0764c8316fd5b
Committed by
Tom Rini
Tom Rini
1 parent
f4787eab13
Exists in
v2017.01-smarct4x
and in
34 other branches
ARM: BeagleBoard-X15: Enable VTT regulator
BeagleBoard-X15 uses a vtt regulator for DDR3 termination and this is controlled by gpio7_11. Configuring gpio7_11. Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com> Reviewed-by: Tom Rini <trini@konsulko.com>
Showing 2 changed files with 25 additions and 0 deletions Side-by-side Diff
board/ti/beagle_x15/board.c
| ... | ... | @@ -14,6 +14,8 @@ |
| 14 | 14 | #include <usb.h> |
| 15 | 15 | #include <asm/omap_common.h> |
| 16 | 16 | #include <asm/emif.h> |
| 17 | +#include <asm/gpio.h> | |
| 18 | +#include <asm/arch/gpio.h> | |
| 17 | 19 | #include <asm/arch/clock.h> |
| 18 | 20 | #include <asm/arch/dra7xx_iodelay.h> |
| 19 | 21 | #include <asm/arch/sys_proto.h> |
| ... | ... | @@ -30,6 +32,9 @@ |
| 30 | 32 | |
| 31 | 33 | DECLARE_GLOBAL_DATA_PTR; |
| 32 | 34 | |
| 35 | +/* GPIO 7_11 */ | |
| 36 | +#define GPIO_DDR_VTT_EN 203 | |
| 37 | + | |
| 33 | 38 | const struct omap_sysinfo sysinfo = { |
| 34 | 39 | "Board: BeagleBoard x15\n" |
| 35 | 40 | }; |
| ... | ... | @@ -402,6 +407,24 @@ |
| 402 | 407 | printf("Error %d registering CPSW switch\n", ret); |
| 403 | 408 | |
| 404 | 409 | return ret; |
| 410 | +} | |
| 411 | +#endif | |
| 412 | + | |
| 413 | +#ifdef CONFIG_BOARD_EARLY_INIT_F | |
| 414 | +/* VTT regulator enable */ | |
| 415 | +static inline void vtt_regulator_enable(void) | |
| 416 | +{ | |
| 417 | + if (omap_hw_init_context() == OMAP_INIT_CONTEXT_UBOOT_AFTER_SPL) | |
| 418 | + return; | |
| 419 | + | |
| 420 | + gpio_request(GPIO_DDR_VTT_EN, "ddr_vtt_en"); | |
| 421 | + gpio_direction_output(GPIO_DDR_VTT_EN, 1); | |
| 422 | +} | |
| 423 | + | |
| 424 | +int board_early_init_f(void) | |
| 425 | +{ | |
| 426 | + vtt_regulator_enable(); | |
| 427 | + return 0; | |
| 405 | 428 | } |
| 406 | 429 | #endif |