diff options
Diffstat (limited to 'drivers/clk/clk-axi-clkgen.c')
| -rw-r--r-- | drivers/clk/clk-axi-clkgen.c | 64 |
1 files changed, 39 insertions, 25 deletions
diff --git a/drivers/clk/clk-axi-clkgen.c b/drivers/clk/clk-axi-clkgen.c index 14d803e6af62..ad86e031ba3e 100644 --- a/drivers/clk/clk-axi-clkgen.c +++ b/drivers/clk/clk-axi-clkgen.c @@ -46,9 +46,17 @@ #define MMCM_CLK_DIV_DIVIDE BIT(11) #define MMCM_CLK_DIV_NOCOUNT BIT(12) +struct axi_clkgen_limits { + unsigned int fpfd_min; + unsigned int fpfd_max; + unsigned int fvco_min; + unsigned int fvco_max; +}; + struct axi_clkgen { void __iomem *base; struct clk_hw clk_hw; + struct axi_clkgen_limits limits; }; static uint32_t axi_clkgen_lookup_filter(unsigned int m) @@ -100,12 +108,15 @@ static uint32_t axi_clkgen_lookup_lock(unsigned int m) return 0x1f1f00fa; } -static const unsigned int fpfd_min = 10000; -static const unsigned int fpfd_max = 300000; -static const unsigned int fvco_min = 600000; -static const unsigned int fvco_max = 1200000; +static const struct axi_clkgen_limits axi_clkgen_zynq_default_limits = { + .fpfd_min = 10000, + .fpfd_max = 300000, + .fvco_min = 600000, + .fvco_max = 1200000, +}; -static void axi_clkgen_calc_params(unsigned long fin, unsigned long fout, +static void axi_clkgen_calc_params(const struct axi_clkgen_limits *limits, + unsigned long fin, unsigned long fout, unsigned int *best_d, unsigned int *best_m, unsigned int *best_dout) { unsigned long d, d_min, d_max, _d_min, _d_max; @@ -122,12 +133,12 @@ static void axi_clkgen_calc_params(unsigned long fin, unsigned long fout, *best_m = 0; *best_dout = 0; - d_min = max_t(unsigned long, DIV_ROUND_UP(fin, fpfd_max), 1); - d_max = min_t(unsigned long, fin / fpfd_min, 80); + d_min = max_t(unsigned long, DIV_ROUND_UP(fin, limits->fpfd_max), 1); + d_max = min_t(unsigned long, fin / limits->fpfd_min, 80); again: - fvco_min_fract = fvco_min << fract_shift; - fvco_max_fract = fvco_max << fract_shift; + fvco_min_fract = limits->fvco_min << fract_shift; + fvco_max_fract = limits->fvco_max << fract_shift; m_min = max_t(unsigned long, DIV_ROUND_UP(fvco_min_fract, fin) * d_min, 1); m_max = min_t(unsigned long, fvco_max_fract * d_max / fin, 64 << fract_shift); @@ -319,6 +330,7 @@ static int axi_clkgen_set_rate(struct clk_hw *clk_hw, unsigned long rate, unsigned long parent_rate) { struct axi_clkgen *axi_clkgen = clk_hw_to_axi_clkgen(clk_hw); + const struct axi_clkgen_limits *limits = &axi_clkgen->limits; unsigned int d, m, dout; struct axi_clkgen_div_params params; uint32_t power = 0; @@ -328,7 +340,7 @@ static int axi_clkgen_set_rate(struct clk_hw *clk_hw, if (parent_rate == 0 || rate == 0) return -EINVAL; - axi_clkgen_calc_params(parent_rate, rate, &d, &m, &dout); + axi_clkgen_calc_params(limits, parent_rate, rate, &d, &m, &dout); if (d == 0 || dout == 0 || m == 0) return -EINVAL; @@ -368,10 +380,12 @@ static int axi_clkgen_set_rate(struct clk_hw *clk_hw, static long axi_clkgen_round_rate(struct clk_hw *hw, unsigned long rate, unsigned long *parent_rate) { + struct axi_clkgen *axi_clkgen = clk_hw_to_axi_clkgen(hw); + const struct axi_clkgen_limits *limits = &axi_clkgen->limits; unsigned int d, m, dout; unsigned long long tmp; - axi_clkgen_calc_params(*parent_rate, rate, &d, &m, &dout); + axi_clkgen_calc_params(limits, *parent_rate, rate, &d, &m, &dout); if (d == 0 || dout == 0 || m == 0) return -EINVAL; @@ -482,17 +496,9 @@ static const struct clk_ops axi_clkgen_ops = { .get_parent = axi_clkgen_get_parent, }; -static const struct of_device_id axi_clkgen_ids[] = { - { - .compatible = "adi,axi-clkgen-2.00.a", - }, - { }, -}; -MODULE_DEVICE_TABLE(of, axi_clkgen_ids); - static int axi_clkgen_probe(struct platform_device *pdev) { - const struct of_device_id *id; + const struct axi_clkgen_limits *dflt_limits; struct axi_clkgen *axi_clkgen; struct clk_init_data init; const char *parent_names[2]; @@ -501,11 +507,8 @@ static int axi_clkgen_probe(struct platform_device *pdev) unsigned int i; int ret; - if (!pdev->dev.of_node) - return -ENODEV; - - id = of_match_node(axi_clkgen_ids, pdev->dev.of_node); - if (!id) + dflt_limits = device_get_match_data(&pdev->dev); + if (!dflt_limits) return -ENODEV; axi_clkgen = devm_kzalloc(&pdev->dev, sizeof(*axi_clkgen), GFP_KERNEL); @@ -527,6 +530,8 @@ static int axi_clkgen_probe(struct platform_device *pdev) return -EINVAL; } + memcpy(&axi_clkgen->limits, dflt_limits, sizeof(axi_clkgen->limits)); + clk_name = pdev->dev.of_node->name; of_property_read_string(pdev->dev.of_node, "clock-output-names", &clk_name); @@ -554,6 +559,15 @@ static int axi_clkgen_remove(struct platform_device *pdev) return 0; } +static const struct of_device_id axi_clkgen_ids[] = { + { + .compatible = "adi,axi-clkgen-2.00.a", + .data = &axi_clkgen_zynq_default_limits, + }, + { } +}; +MODULE_DEVICE_TABLE(of, axi_clkgen_ids); + static struct platform_driver axi_clkgen_driver = { .driver = { .name = "adi-axi-clkgen", |