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OMAP3: Setup MUX settings for SDRC CKE signals

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This patches ensures the MUX settings are correct for the SDRC
CKE signals to SDRAM. This allows the self-refresh to work when
2 chip-selects are in use.

A warning is thrown away in case the initial muxing is incorrect,
in order to track faulty or old-dated bootloaders.
Note: The CONFIG_OMAP_MUX and CONFIG_OMAP_MUX_WARNINGS options
must be enabled for the mux code to have effect.

Signed-off-by: Jean Pihet <jpihet@mvista.com>
Signed-off-by: Paul Walmsley <paul@pwsan.com>
This commit is contained in:
Jean Pihet 2009-07-24 19:43:25 -06:00 committed by paul
parent 58cda884ec
commit 9fb97412c3
6 changed files with 28 additions and 0 deletions
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4
arch/arm/mach-omap2/board-omap3beagle.c
View file

@ -409,6 +409,10 @@ static void __init omap3_beagle_init(void)
usb_musb_init();
omap3beagle_flash_init();
/* Ensure SDRC pins are mux'd for self-refresh */
omap_cfg_reg(H16_34XX_SDRC_CKE0);
omap_cfg_reg(H17_34XX_SDRC_CKE1);
}
static void __init omap3_beagle_map_io(void)

5
arch/arm/mach-omap2/board-omap3pandora.c
View file

@ -40,6 +40,7 @@
#include <mach/mcspi.h>
#include <mach/usb.h>
#include <mach/keypad.h>
#include <mach/mux.h>
#include "sdram-micron-mt46h32m32lf-6.h"
#include "mmc-twl4030.h"
@ -398,6 +399,10 @@ static void __init omap3pandora_init(void)
omap3pandora_ads7846_init();
pandora_keys_gpio_init();
usb_musb_init();
/* Ensure SDRC pins are mux'd for self-refresh */
omap_cfg_reg(H16_34XX_SDRC_CKE0);
omap_cfg_reg(H17_34XX_SDRC_CKE1);
}
static void __init omap3pandora_map_io(void)

5
arch/arm/mach-omap2/board-overo.c
View file

@ -44,6 +44,7 @@
#include <mach/gpmc.h>
#include <mach/hardware.h>
#include <mach/nand.h>
#include <mach/mux.h>
#include <mach/usb.h>
#include "sdram-micron-mt46h32m32lf-6.h"
@ -396,6 +397,10 @@ static void __init overo_init(void)
overo_ads7846_init();
overo_init_smsc911x();
/* Ensure SDRC pins are mux'd for self-refresh */
omap_cfg_reg(H16_34XX_SDRC_CKE0);
omap_cfg_reg(H17_34XX_SDRC_CKE1);
if ((gpio_request(OVERO_GPIO_W2W_NRESET,
"OVERO_GPIO_W2W_NRESET") == 0) &&
(gpio_direction_output(OVERO_GPIO_W2W_NRESET, 1) == 0)) {

4
arch/arm/mach-omap2/board-rx51.c
View file

@ -75,6 +75,10 @@ static void __init rx51_init(void)
omap_serial_init();
usb_musb_init();
rx51_peripherals_init();
/* Ensure SDRC pins are mux'd for self-refresh */
omap_cfg_reg(H16_34XX_SDRC_CKE0);
omap_cfg_reg(H17_34XX_SDRC_CKE1);
}
static void __init rx51_map_io(void)

6
arch/arm/mach-omap2/mux.c
View file

@ -486,6 +486,12 @@ MUX_CFG_34XX("H19_34XX_GPIO164_OUT", 0x19c,
OMAP34XX_MUX_MODE4 | OMAP34XX_PIN_OUTPUT)
MUX_CFG_34XX("J25_34XX_GPIO170", 0x1c6,
OMAP34XX_MUX_MODE4 | OMAP34XX_PIN_INPUT)
/* OMAP3 SDRC CKE signals to SDR/DDR ram chips */
MUX_CFG_34XX("H16_34XX_SDRC_CKE0", 0x262,
OMAP34XX_MUX_MODE0 | OMAP34XX_PIN_OUTPUT)
MUX_CFG_34XX("H17_34XX_SDRC_CKE1", 0x264,
OMAP34XX_MUX_MODE0 | OMAP34XX_PIN_OUTPUT)
};
#define OMAP34XX_PINS_SZ ARRAY_SIZE(omap34xx_pins)

4
arch/arm/plat-omap/include/mach/mux.h
View file

@ -853,6 +853,10 @@ enum omap34xx_index {
AE5_34XX_GPIO143,
H19_34XX_GPIO164_OUT,
J25_34XX_GPIO170,
/* OMAP3 SDRC CKE signals to SDR/DDR ram chips */
H16_34XX_SDRC_CKE0,
H17_34XX_SDRC_CKE1,
};
struct omap_mux_cfg {