mirror of https://gitee.com/openkylin/linux.git
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>
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@ -46,9 +46,42 @@
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#define OMAP3EVM_ETHR_START 0x2c000000
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#define OMAP3EVM_ETHR_SIZE 1024
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#define OMAP3EVM_ETHR_ID_REV 0x50
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#define OMAP3EVM_ETHR_GPIO_IRQ 176
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#define OMAP3EVM_SMC911X_CS 5
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static u8 omap3_evm_version;
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u8 get_omap3_evm_rev(void)
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{
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return omap3_evm_version;
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}
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EXPORT_SYMBOL(get_omap3_evm_rev);
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static void __init omap3_evm_get_revision(void)
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{
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void __iomem *ioaddr;
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unsigned int smsc_id;
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/* Ethernet PHY ID is stored at ID_REV register */
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ioaddr = ioremap_nocache(OMAP3EVM_ETHR_START, SZ_1K);
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if (!ioaddr)
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return;
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smsc_id = readl(ioaddr + OMAP3EVM_ETHR_ID_REV) & 0xFFFF0000;
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iounmap(ioaddr);
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switch (smsc_id) {
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/*SMSC9115 chipset*/
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case 0x01150000:
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omap3_evm_version = OMAP3EVM_BOARD_GEN_1;
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break;
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/*SMSC 9220 chipset*/
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case 0x92200000:
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default:
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omap3_evm_version = OMAP3EVM_BOARD_GEN_2;
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}
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}
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static struct resource omap3evm_smc911x_resources[] = {
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[0] = {
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.start = OMAP3EVM_ETHR_START,
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@ -321,6 +354,8 @@ static struct ehci_hcd_omap_platform_data ehci_pdata __initconst = {
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static void __init omap3_evm_init(void)
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{
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omap3_evm_get_revision();
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omap3_evm_i2c_init();
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platform_add_devices(omap3_evm_devices, ARRAY_SIZE(omap3_evm_devices));
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@ -14,6 +14,18 @@
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#include <plat/gpio-switch.h>
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/*
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* OMAP35x EVM revision
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* Run time detection of EVM revision is done by reading Ethernet
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* PHY ID -
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* GEN_1 = 0x01150000
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* GEN_2 = 0x92200000
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*/
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enum {
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OMAP3EVM_BOARD_GEN_1 = 0, /* EVM Rev between A - D */
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OMAP3EVM_BOARD_GEN_2, /* EVM Rev >= Rev E */
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};
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/* Different peripheral ids */
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#define OMAP_TAG_CLOCK 0x4f01
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#define OMAP_TAG_LCD 0x4f05
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@ -157,4 +169,10 @@ extern int omap_board_config_size;
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/* for TI reference platforms sharing the same debug card */
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extern int debug_card_init(u32 addr, unsigned gpio);
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/* OMAP3EVM revision */
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#if defined(CONFIG_MACH_OMAP3EVM)
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u8 get_omap3_evm_rev(void);
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#else
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#define get_omap3_evm_rev() (-EINVAL)
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#endif
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#endif
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