diff options
| author | Ajay Kumar Gupta <ajay.gupta@ti.com> | 2009-11-22 10:11:27 -0800 |
|---|---|---|
| committer | Tony Lindgren <tony@atomide.com> | 2009-11-22 10:24:33 -0800 |
| commit | db408023b85644e1bee80d4004aff1ff188032e9 (patch) | |
| tree | bed99e2c03d4b137082e58b76fb0528fe75cff8a /arch/arm/mach-omap2/board-omap3evm.c | |
| parent | 50a1f7bfea7ba9330f984ecb7d35aeb93d326cc3 (diff) | |
| download | lwn-db408023b85644e1bee80d4004aff1ff188032e9.tar.gz lwn-db408023b85644e1bee80d4004aff1ff188032e9.zip | |
omap3evm: Add board revision function
Added function to differentiate between the OMAP3EVM revisions. The
chip-id of the ethernet PHY is being used for this purpose.
Rev A to D : 0x01150000
Rev >= E : 0x92200000
Signed-off-by: Vaibhav Hiremath <hvaibhav@ti.com>
Signed-off-by: Ajay Kumar Gupta <ajay.gupta@ti.com>
Signed-off-by: Sanjeev Premi <premi@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Diffstat (limited to 'arch/arm/mach-omap2/board-omap3evm.c')
| -rw-r--r-- | arch/arm/mach-omap2/board-omap3evm.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/board-omap3evm.c b/arch/arm/mach-omap2/board-omap3evm.c index 1edf06adbe3c..149d45ca89a7 100644 --- a/arch/arm/mach-omap2/board-omap3evm.c +++ b/arch/arm/mach-omap2/board-omap3evm.c @@ -46,9 +46,42 @@ #define OMAP3EVM_ETHR_START 0x2c000000 #define OMAP3EVM_ETHR_SIZE 1024 +#define OMAP3EVM_ETHR_ID_REV 0x50 #define OMAP3EVM_ETHR_GPIO_IRQ 176 #define OMAP3EVM_SMC911X_CS 5 +static u8 omap3_evm_version; + +u8 get_omap3_evm_rev(void) +{ + return omap3_evm_version; +} +EXPORT_SYMBOL(get_omap3_evm_rev); + +static void __init omap3_evm_get_revision(void) +{ + void __iomem *ioaddr; + unsigned int smsc_id; + + /* Ethernet PHY ID is stored at ID_REV register */ + ioaddr = ioremap_nocache(OMAP3EVM_ETHR_START, SZ_1K); + if (!ioaddr) + return; + smsc_id = readl(ioaddr + OMAP3EVM_ETHR_ID_REV) & 0xFFFF0000; + iounmap(ioaddr); + + switch (smsc_id) { + /*SMSC9115 chipset*/ + case 0x01150000: + omap3_evm_version = OMAP3EVM_BOARD_GEN_1; + break; + /*SMSC 9220 chipset*/ + case 0x92200000: + default: + omap3_evm_version = OMAP3EVM_BOARD_GEN_2; + } +} + static struct resource omap3evm_smc911x_resources[] = { [0] = { .start = OMAP3EVM_ETHR_START, @@ -321,6 +354,8 @@ static struct ehci_hcd_omap_platform_data ehci_pdata __initconst = { static void __init omap3_evm_init(void) { + omap3_evm_get_revision(); + omap3_evm_i2c_init(); platform_add_devices(omap3_evm_devices, ARRAY_SIZE(omap3_evm_devices)); |