davinci: Handle pinmux conflict between mmc/sd and nor flash

On DA850/OMAP-L138 EVM, MMC/SD and NOR Flash share
some of the AEMIF pins. This patch prints out a warning
during booting, if both MMC/SD and NOR Flash are enabled
in kernel menuconfig.

If both MMC/SD and NOR Flash are enabled, only MMC/SD
will work correctly.

Signed-off-by: Sudhakar Rajashekhara <sudhakar.raj@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
This commit is contained in:
Sudhakar Rajashekhara 2009-08-13 18:16:28 -04:00 коммит произвёл Kevin Hilman
Родитель 7c5ec6095a
Коммит 820c4fe32e
1 изменённых файлов: 39 добавлений и 18 удалений

Просмотреть файл

@ -244,6 +244,20 @@ static void __init da850_evm_init_nor(void)
iounmap(aemif_addr);
}
#if defined(CONFIG_MTD_PHYSMAP) || \
defined(CONFIG_MTD_PHYSMAP_MODULE)
#define HAS_NOR 1
#else
#define HAS_NOR 0
#endif
#if defined(CONFIG_MMC_DAVINCI) || \
defined(CONFIG_MMC_DAVINCI_MODULE)
#define HAS_MMC 1
#else
#define HAS_MMC 0
#endif
static __init void da850_evm_init(void)
{
struct davinci_soc_info *soc_info = &davinci_soc_info;
@ -298,27 +312,34 @@ static __init void da850_evm_init(void)
pr_warning("da830_evm_init: watchdog registration failed: %d\n",
ret);
ret = da8xx_pinmux_setup(da850_mmcsd0_pins);
if (ret)
pr_warning("da850_evm_init: mmcsd0 mux setup failed: %d\n",
ret);
if (HAS_MMC) {
if (HAS_NOR)
pr_warning("WARNING: both NOR Flash and MMC/SD are "
"enabled, but they share AEMIF pins.\n"
"\tDisable one of them.\n");
ret = gpio_request(DA850_MMCSD_CD_PIN, "MMC CD\n");
if (ret)
pr_warning("da850_evm_init: can not open GPIO %d\n",
DA850_MMCSD_CD_PIN);
gpio_direction_input(DA850_MMCSD_CD_PIN);
ret = da8xx_pinmux_setup(da850_mmcsd0_pins);
if (ret)
pr_warning("da850_evm_init: mmcsd0 mux setup failed:"
" %d\n", ret);
ret = gpio_request(DA850_MMCSD_WP_PIN, "MMC WP\n");
if (ret)
pr_warning("da850_evm_init: can not open GPIO %d\n",
DA850_MMCSD_WP_PIN);
gpio_direction_input(DA850_MMCSD_WP_PIN);
ret = gpio_request(DA850_MMCSD_CD_PIN, "MMC CD\n");
if (ret)
pr_warning("da850_evm_init: can not open GPIO %d\n",
DA850_MMCSD_CD_PIN);
gpio_direction_input(DA850_MMCSD_CD_PIN);
ret = da8xx_register_mmcsd0(&da850_mmc_config);
if (ret)
pr_warning("da850_evm_init: mmcsd0 registration failed: %d\n",
ret);
ret = gpio_request(DA850_MMCSD_WP_PIN, "MMC WP\n");
if (ret)
pr_warning("da850_evm_init: can not open GPIO %d\n",
DA850_MMCSD_WP_PIN);
gpio_direction_input(DA850_MMCSD_WP_PIN);
ret = da8xx_register_mmcsd0(&da850_mmc_config);
if (ret)
pr_warning("da850_evm_init: mmcsd0 registration failed:"
" %d\n", ret);
}
davinci_serial_init(&da850_evm_uart_config);