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| author | Fabio Estevam <fabio.estevam@freescale.com> | 2013-09-13 00:36:28 -0300 |
|---|---|---|
| committer | Stefano Babic <sbabic@denx.de> | 2013-09-20 17:55:37 +0200 |
| commit | 31f07964c896e19b501e9a4a59a8df85515cd0b9 (patch) | |
| tree | 2a0422e6df2908dbc65cfbe5fb11e92644252f15 /arch/arm/cpu/armv7/mx6/clock.c | |
| parent | 7df51fd8be413a6b831f0fa7b83cad76b5c4e951 (diff) | |
| download | talos-obmc-uboot-31f07964c896e19b501e9a4a59a8df85515cd0b9.tar.gz talos-obmc-uboot-31f07964c896e19b501e9a4a59a8df85515cd0b9.zip | |
mx6slevk: Add Ethernet support
mx6slevk has a SMSC8720 connected in RMII mode.
Add support for it.
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Diffstat (limited to 'arch/arm/cpu/armv7/mx6/clock.c')
| -rw-r--r-- | arch/arm/cpu/armv7/mx6/clock.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/arch/arm/cpu/armv7/mx6/clock.c b/arch/arm/cpu/armv7/mx6/clock.c index 7a29c9b692..010d93208e 100644 --- a/arch/arm/cpu/armv7/mx6/clock.c +++ b/arch/arm/cpu/armv7/mx6/clock.c @@ -282,6 +282,36 @@ static u32 get_mmdc_ch0_clk(void) return freq / (podf + 1); } + +int enable_fec_anatop_clock(void) +{ + u32 reg = 0; + s32 timeout = 100000; + + struct anatop_regs __iomem *anatop = + (struct anatop_regs __iomem *)ANATOP_BASE_ADDR; + + reg = readl(&anatop->pll_enet); + if ((reg & BM_ANADIG_PLL_ENET_POWERDOWN) || + (!(reg & BM_ANADIG_PLL_ENET_LOCK))) { + reg &= ~BM_ANADIG_PLL_ENET_POWERDOWN; + writel(reg, &anatop->pll_enet); + while (timeout--) { + if (readl(&anatop->pll_enet) & BM_ANADIG_PLL_ENET_LOCK) + break; + } + if (timeout < 0) + return -ETIMEDOUT; + } + + /* Enable FEC clock */ + reg |= BM_ANADIG_PLL_ENET_ENABLE; + reg &= ~BM_ANADIG_PLL_ENET_BYPASS; + writel(reg, &anatop->pll_enet); + + return 0; +} + #else static u32 get_mmdc_ch0_clk(void) { |
