On 10/31/2012 07:58 PM, Josh Cartwright wrote:
> [...]
> +#define PERIPH_CLK_CTRL_SRC(x)       (periph_clk_parent_map[((x)&3)>>4])
> +#define PERIPH_CLK_CTRL_DIV(x)       (((x)&0x3F00)>>8)

A few more spaces wouldn't hurt ;)

> [...]
> +static void __init zynq_periph_clk_setup(struct device_node *np)
> +{
> +     struct zynq_periph_clk *periph;
> +     const char *parent_names[3];
> +     struct clk_init_data init;
> +     struct clk *clk;
> +     int err;
> +     u32 reg;
> +     int i;
> +
> +     err = of_property_read_u32(np, "reg", &reg);
> +     WARN_ON(err);

Shouldn't the function abort if a error happens somewhere? Continuing here
will lead to undefined behavior. Same is probably true for the other WARN_ONs.

> +
> +     periph = kzalloc(sizeof(*periph), GFP_KERNEL);
> +     WARN_ON(!periph);
> +
> +     periph->clk_ctrl = slcr_base + reg;
> +     spin_lock_init(&periph->clkact_lock);
> +
> +     init.name = np->name;
> +     init.ops = &zynq_periph_clk_ops;
> +     for (i = 0; i < ARRAY_SIZE(parent_names); i++)
> +             parent_names[i] = of_clk_get_parent_name(np, i);
> +     init.parent_names = parent_names;
> +     init.num_parents = ARRAY_SIZE(parent_names);
> +
> +     periph->hw.init = &init;
> +
> +     clk = clk_register(NULL, &periph->hw);
> +     WARN_ON(IS_ERR(clk));
> +
> +     err = of_clk_add_provider(np, of_clk_src_simple_get, clk);
> +     WARN_ON(err);
> +
> +     for (i = 0; i < 2; i++) {

Not all of the peripheral clock generators have two output clocks. I think
it makes sense to use the number entries in clock-output-names here.

> +             const char *name;
> +
> +             err = of_property_read_string_index(np, "clock-output-names", i,
> +                                                 &name);
> +             WARN_ON(err);
> +
> +             periph->gates[i] = clk_register_gate(NULL, name, np->name, 0,
> +                                                  periph->clk_ctrl, i, 0,
> +                                                  &periph->clkact_lock);
> +             WARN_ON(IS_ERR(periph->gates[i]));
> +     }
> +
> +     periph->onecell_data.clks = periph->gates;
> +     periph->onecell_data.clk_num = i;
> +
> +     err = of_clk_add_provider(np, of_clk_src_onecell_get,
> +                               &periph->onecell_data);
> +     WARN_ON(err);
> +}
> [...]

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Reply via email to