diff options
Diffstat (limited to 'drivers/clk/socfpga/clk-periph.c')
| -rw-r--r-- | drivers/clk/socfpga/clk-periph.c | 22 |
1 files changed, 19 insertions, 3 deletions
diff --git a/drivers/clk/socfpga/clk-periph.c b/drivers/clk/socfpga/clk-periph.c index 81623a3736f9..46531c34ec9b 100644 --- a/drivers/clk/socfpga/clk-periph.c +++ b/drivers/clk/socfpga/clk-periph.c @@ -29,12 +29,18 @@ static unsigned long clk_periclk_recalc_rate(struct clk_hw *hwclk, unsigned long parent_rate) { struct socfpga_periph_clk *socfpgaclk = to_socfpga_periph_clk(hwclk); - u32 div; + u32 div, val; - if (socfpgaclk->fixed_div) + if (socfpgaclk->fixed_div) { div = socfpgaclk->fixed_div; - else + } else { + if (socfpgaclk->div_reg) { + val = readl(socfpgaclk->div_reg) >> socfpgaclk->shift; + val &= div_mask(socfpgaclk->width); + parent_rate /= (val + 1); + } div = ((readl(socfpgaclk->hw.reg) & 0x1ff) + 1); + } return parent_rate / div; } @@ -54,6 +60,7 @@ static __init void __socfpga_periph_init(struct device_node *node, struct clk_init_data init; int rc; u32 fixed_div; + u32 div_reg[3]; of_property_read_u32(node, "reg", ®); @@ -63,6 +70,15 @@ static __init void __socfpga_periph_init(struct device_node *node, periph_clk->hw.reg = clk_mgr_base_addr + reg; + rc = of_property_read_u32_array(node, "div-reg", div_reg, 3); + if (!rc) { + periph_clk->div_reg = clk_mgr_base_addr + div_reg[0]; + periph_clk->shift = div_reg[1]; + periph_clk->width = div_reg[2]; + } else { + periph_clk->div_reg = 0; + } + rc = of_property_read_u32(node, "fixed-divider", &fixed_div); if (rc) periph_clk->fixed_div = 0; |