diff options
Diffstat (limited to 'drivers/clk/sunxi/clk-sunxi.c')
-rw-r--r-- | drivers/clk/sunxi/clk-sunxi.c | 98 |
1 files changed, 0 insertions, 98 deletions
diff --git a/drivers/clk/sunxi/clk-sunxi.c b/drivers/clk/sunxi/clk-sunxi.c index 4a8294dad613..880095048d4d 100644 --- a/drivers/clk/sunxi/clk-sunxi.c +++ b/drivers/clk/sunxi/clk-sunxi.c @@ -351,104 +351,6 @@ static void sun7i_a20_get_out_factors(u32 *freq, u32 parent_rate, *p = calcp; } - - -/** - * sun7i_a20_gmac_clk_setup - Setup function for A20/A31 GMAC clock module - * - * This clock looks something like this - * ________________________ - * MII TX clock from PHY >-----|___________ _________|----> to GMAC core - * GMAC Int. RGMII TX clk >----|___________\__/__gate---|----> to PHY - * Ext. 125MHz RGMII TX clk >--|__divider__/ | - * |________________________| - * - * The external 125 MHz reference is optional, i.e. GMAC can use its - * internal TX clock just fine. The A31 GMAC clock module does not have - * the divider controls for the external reference. - * - * To keep it simple, let the GMAC use either the MII TX clock for MII mode, - * and its internal TX clock for GMII and RGMII modes. The GMAC driver should - * select the appropriate source and gate/ungate the output to the PHY. - * - * Only the GMAC should use this clock. Altering the clock so that it doesn't - * match the GMAC's operation parameters will result in the GMAC not being - * able to send traffic out. The GMAC driver should set the clock rate and - * enable/disable this clock to configure the required state. The clock - * driver then responds by auto-reparenting the clock. - */ - -#define SUN7I_A20_GMAC_GPIT 2 -#define SUN7I_A20_GMAC_MASK 0x3 -#define SUN7I_A20_GMAC_PARENTS 2 - -static void __init sun7i_a20_gmac_clk_setup(struct device_node *node) -{ - struct clk *clk; - struct clk_mux *mux; - struct clk_gate *gate; - const char *clk_name = node->name; - const char *parents[SUN7I_A20_GMAC_PARENTS]; - void *reg; - - if (of_property_read_string(node, "clock-output-names", &clk_name)) - return; - - /* allocate mux and gate clock structs */ - mux = kzalloc(sizeof(struct clk_mux), GFP_KERNEL); - if (!mux) - return; - - gate = kzalloc(sizeof(struct clk_gate), GFP_KERNEL); - if (!gate) - goto free_mux; - - /* gmac clock requires exactly 2 parents */ - parents[0] = of_clk_get_parent_name(node, 0); - parents[1] = of_clk_get_parent_name(node, 1); - if (!parents[0] || !parents[1]) - goto free_gate; - - reg = of_iomap(node, 0); - if (!reg) - goto free_gate; - - /* set up gate and fixed rate properties */ - gate->reg = reg; - gate->bit_idx = SUN7I_A20_GMAC_GPIT; - gate->lock = &clk_lock; - mux->reg = reg; - mux->mask = SUN7I_A20_GMAC_MASK; - mux->flags = CLK_MUX_INDEX_BIT; - mux->lock = &clk_lock; - - clk = clk_register_composite(NULL, clk_name, - parents, SUN7I_A20_GMAC_PARENTS, - &mux->hw, &clk_mux_ops, - NULL, NULL, - &gate->hw, &clk_gate_ops, - 0); - - if (IS_ERR(clk)) - goto iounmap_reg; - - of_clk_add_provider(node, of_clk_src_simple_get, clk); - clk_register_clkdev(clk, clk_name, NULL); - - return; - -iounmap_reg: - iounmap(reg); -free_gate: - kfree(gate); -free_mux: - kfree(mux); -} -CLK_OF_DECLARE(sun7i_a20_gmac, "allwinner,sun7i-a20-gmac-clk", - sun7i_a20_gmac_clk_setup); - - - /** * clk_sunxi_mmc_phase_control() - configures MMC clock phase control */ |