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| author | Soren Brinkmann <soren.brinkmann@xilinx.com> | 2013-11-21 13:39:01 -0800 |
|---|---|---|
| committer | Michal Simek <michal.simek@xilinx.com> | 2014-02-19 09:41:21 +0100 |
| commit | 97598fcf10eba577622f3387eaecd43dd710da0d (patch) | |
| tree | 68f59303d1d8f6ca2d941f8365fa00868091603e /drivers | |
| parent | 1cd46ed2d30a931a66400635f158b14861f2d3b4 (diff) | |
| download | talos-obmc-uboot-97598fcf10eba577622f3387eaecd43dd710da0d.tar.gz talos-obmc-uboot-97598fcf10eba577622f3387eaecd43dd710da0d.zip | |
net: zynq_gem: Calculate clock dividers dynamically
Remove hard coded clock divider setting and use the Zynq clock framework
to dynamically calculate appropriate dividers at run time.
Signed-off-by: Soren Brinkmann <soren.brinkmann@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/zynq_gem.c | 17 |
1 files changed, 11 insertions, 6 deletions
diff --git a/drivers/net/zynq_gem.c b/drivers/net/zynq_gem.c index 2eb9e7d1ef..6d4001b017 100644 --- a/drivers/net/zynq_gem.c +++ b/drivers/net/zynq_gem.c @@ -90,6 +90,11 @@ #define ZYNQ_GEM_TXBUF_EXHAUSTED 0x08000000 #define ZYNQ_GEM_TXBUF_UNDERRUN 0x10000000 +/* Clock frequencies for different speeds */ +#define ZYNQ_GEM_FREQUENCY_10 2500000UL +#define ZYNQ_GEM_FREQUENCY_100 25000000UL +#define ZYNQ_GEM_FREQUENCY_1000 125000000UL + /* Device registers */ struct zynq_gem_regs { u32 nwctrl; /* Network Control reg */ @@ -270,7 +275,8 @@ static int zynq_gem_setup_mac(struct eth_device *dev) static int zynq_gem_init(struct eth_device *dev, bd_t * bis) { - u32 i, clk = 0; + u32 i; + unsigned long clk_rate = 0; struct phy_device *phydev; const u32 stat_size = (sizeof(struct zynq_gem_regs) - offsetof(struct zynq_gem_regs, stat)) / 4; @@ -348,23 +354,22 @@ static int zynq_gem_init(struct eth_device *dev, bd_t * bis) case SPEED_1000: writel(ZYNQ_GEM_NWCFG_INIT | ZYNQ_GEM_NWCFG_SPEED1000, ®s->nwcfg); - clk = (1 << 20) | (8 << 8) | (0 << 4) | (1 << 0); + clk_rate = ZYNQ_GEM_FREQUENCY_1000; break; case SPEED_100: clrsetbits_le32(®s->nwcfg, ZYNQ_GEM_NWCFG_SPEED1000, ZYNQ_GEM_NWCFG_INIT | ZYNQ_GEM_NWCFG_SPEED100); - clk = (5 << 20) | (8 << 8) | (0 << 4) | (1 << 0); + clk_rate = ZYNQ_GEM_FREQUENCY_100; break; case SPEED_10: - /* FIXME untested */ - clk = (5 << 20) | (8 << 8) | (0 << 4) | (1 << 0); + clk_rate = ZYNQ_GEM_FREQUENCY_10; break; } /* Change the rclk and clk only not using EMIO interface */ if (!priv->emio) zynq_slcr_gem_clk_setup(dev->iobase != - ZYNQ_GEM_BASEADDR0, clk); + ZYNQ_GEM_BASEADDR0, clk_rate); setbits_le32(®s->nwctrl, ZYNQ_GEM_NWCTRL_RXEN_MASK | ZYNQ_GEM_NWCTRL_TXEN_MASK); |
