RE: [PATCH 3/3] omap3evm: musb: Update power capability for OMAP3EVM (Rev >= E)

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> From: linux-omap-owner@xxxxxxxxxxxxxxx [mailto:linux-omap-
> owner@xxxxxxxxxxxxxxx] On Behalf Of Gupta, Ajay Kumar
> Sent: Wednesday, October 28, 2009 5:13 PM
> 
[...]
> diff --git a/arch/arm/mach-omap2/usb-musb.c b/arch/arm/mach-omap2/usb-
> musb.c
> index a80441d..529e2b1 100644
> --- a/arch/arm/mach-omap2/usb-musb.c
> +++ b/arch/arm/mach-omap2/usb-musb.c
> @@ -148,10 +148,14 @@ static struct platform_device musb_device = {
> 
>  void __init usb_musb_init(void)
>  {
> -	if (cpu_is_omap243x())
> +	if (cpu_is_omap243x()) {
>  		musb_resources[0].start = OMAP243X_HS_BASE;
> -	else
> +	} else {
Do you need {} for a one liner? Checkpatch should have warned you I think..

>  		musb_resources[0].start = OMAP34XX_HSUSB_OTG_BASE;
> +		/* OMAP3EVM Rev >= E can source 500mA */
> +		if (get_omap3_evm_rev() >= OMAP3EVM_BOARD_GEN_2)
> +			musb_plat.power = 250;
> +	}
>  	musb_resources[0].end = musb_resources[0].start + SZ_8K - 1;
> 
>  	/*
> diff --git a/drivers/usb/musb/musb_regs.h b/drivers/usb/musb/musb_regs.h
> index cc1d71b..a0314df 100644
> --- a/drivers/usb/musb/musb_regs.h
> +++ b/drivers/usb/musb/musb_regs.h
> @@ -72,6 +72,10 @@
>  #define MUSB_DEVCTL_HR		0x02
>  #define MUSB_DEVCTL_SESSION	0x01
> 
> +/* ULPI VBUSCONTROL */
> +#define ULPI_USE_EXTVBUS	0x01
> +#define ULPI_USE_EXTVBUSIND	0x02
> +
>  /* TESTMODE */
>  #define MUSB_TEST_FORCE_HOST	0x80
>  #define MUSB_TEST_FIFO_ACCESS	0x40
> @@ -246,6 +250,7 @@
> 
>  /* REVISIT: vctrl/vstatus: optional vendor utmi+phy register at 0x68 */
>  #define MUSB_HWVERS		0x6C	/* 8 bit */
> +#define MUSB_ULPI_BUSCONTROL	0x70	/* 8 bit */
> 
>  #define MUSB_EPINFO		0x78	/* 8 bit */
>  #define MUSB_RAMINFO		0x79	/* 8 bit */
> diff --git a/drivers/usb/musb/omap2430.c b/drivers/usb/musb/omap2430.c
> index 6761d20..c5fcc30 100644
> --- a/drivers/usb/musb/omap2430.c
> +++ b/drivers/usb/musb/omap2430.c
> @@ -36,6 +36,7 @@
>  #include <asm/mach-types.h>
>  #include <mach/hardware.h>
>  #include <plat/mux.h>
> +#include <plat/board.h>
> 
>  #include "musb_core.h"
>  #include "omap2430.h"
> @@ -203,6 +204,7 @@ int musb_platform_set_mode(struct musb *musb, u8
> musb_mode)
>  int __init musb_platform_init(struct musb *musb)
>  {
>  	u32 l;
> +	u8 val;
> 
>  #if defined(CONFIG_ARCH_OMAP2430)
>  	omap_cfg_reg(AE5_2430_USB0HS_STP);
> @@ -239,6 +241,13 @@ int __init musb_platform_init(struct musb *musb)
>  	l |= ULPI_12PIN;
>  	omap_writel(l, OTG_INTERFSEL);
> 
> +	/* Program PHY to use external Vbus supply for OMAP3EVM Rev >= E */
> +	if (get_omap3_evm_rev() >= OMAP3EVM_BOARD_GEN_2) {
> +		val = musb_readb(musb->mregs, MUSB_ULPI_BUSCONTROL);
> +		val |= ULPI_USE_EXTVBUS;
> +		musb_writeb(musb->mregs, MUSB_ULPI_BUSCONTROL, val);
> +	}
Do we want to do board specific logic inside a IP logic? Wont it be better to do it some way else?

Regards,
Nishanth Menon

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