diff options
| author | Sudhakar Rajashekhara <sudhakar.raj@ti.com> | 2009-08-14 00:16:28 +0200 |
|---|---|---|
| committer | Kevin Hilman <khilman@deeprootsystems.com> | 2009-08-26 10:55:57 +0200 |
| commit | 820c4fe32ea11da338445d225cd51caa4cb69e43 (patch) | |
| tree | a4bf410a458d33e7ad606e3d6ea14ed2e5cc5c4e /arch/arm/mach-davinci | |
| parent | davinci: Add NOR flash support for da850/omap-l138 (diff) | |
| download | linux-820c4fe32ea11da338445d225cd51caa4cb69e43.tar.xz linux-820c4fe32ea11da338445d225cd51caa4cb69e43.zip | |
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>
Diffstat (limited to 'arch/arm/mach-davinci')
| -rw-r--r-- | arch/arm/mach-davinci/board-da850-evm.c | 63 |
1 files changed, 42 insertions, 21 deletions
diff --git a/arch/arm/mach-davinci/board-da850-evm.c b/arch/arm/mach-davinci/board-da850-evm.c index 70a2f487da95..f2946a0cf6f6 100644 --- a/arch/arm/mach-davinci/board-da850-evm.c +++ b/arch/arm/mach-davinci/board-da850-evm.c @@ -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); - - 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 = 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); + 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 = 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_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 = 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); |