diff options
Diffstat (limited to 'arch/arm/mach-at91/setup.c')
| -rw-r--r-- | arch/arm/mach-at91/setup.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/arch/arm/mach-at91/setup.c b/arch/arm/mach-at91/setup.c index 7a19c45ea4..0cc3cc3dec 100644 --- a/arch/arm/mach-at91/setup.c +++ b/arch/arm/mach-at91/setup.c @@ -9,10 +9,12 @@ #include <io.h> #include <init.h> #include <restart.h> +#include <linux/clk.h> #include <mach/hardware.h> #include <mach/cpu.h> #include <mach/at91_dbgu.h> +#include <mach/at91_rstc.h> #include "generic.h" @@ -300,3 +302,26 @@ static int at91_soc_device(void) return 0; } coredevice_initcall(at91_soc_device); + +void at91sam_phy_reset(void __iomem *rstc_base) +{ + unsigned long rstc; + struct clk *clk = clk_get(NULL, "macb_clk"); + + clk_enable(clk); + + rstc = readl(rstc_base + AT91_RSTC_MR) & AT91_RSTC_ERSTL; + + /* Need to reset PHY -> 500ms reset */ + writel(AT91_RSTC_KEY | (AT91_RSTC_ERSTL & (0x0d << 8)) | AT91_RSTC_URSTEN, + rstc_base + AT91_RSTC_MR); + + writel(AT91_RSTC_KEY | AT91_RSTC_EXTRST, rstc_base + AT91_RSTC_CR); + + /* Wait for end hardware reset */ + while (!(readl(rstc_base + AT91_RSTC_SR) & AT91_RSTC_NRSTL)) + ; + + /* Restore NRST value */ + writel(AT91_RSTC_KEY | (rstc) | AT91_RSTC_URSTEN, rstc_base + AT91_RSTC_MR); +} |