diff options
Diffstat (limited to 'target/linux/sunxi/patches-3.13/253-clk-sunxi-add-a20a31-gmac-clock.patch')
| -rw-r--r-- | target/linux/sunxi/patches-3.13/253-clk-sunxi-add-a20a31-gmac-clock.patch | 177 |
1 files changed, 0 insertions, 177 deletions
diff --git a/target/linux/sunxi/patches-3.13/253-clk-sunxi-add-a20a31-gmac-clock.patch b/target/linux/sunxi/patches-3.13/253-clk-sunxi-add-a20a31-gmac-clock.patch deleted file mode 100644 index ce5a0705c1..0000000000 --- a/target/linux/sunxi/patches-3.13/253-clk-sunxi-add-a20a31-gmac-clock.patch +++ /dev/null @@ -1,177 +0,0 @@ -From 967f938d4b16233fd7596e94803a36161847c6a8 Mon Sep 17 00:00:00 2001 -From: Chen-Yu Tsai <wens@csie.org> -Date: Mon, 10 Feb 2014 18:35:47 +0800 -Subject: [PATCH] clk: sunxi: Add Allwinner A20/A31 GMAC clock unit - -The Allwinner A20/A31 clock module controls the transmit clock source -and interface type of the GMAC ethernet controller. Model this as -a single clock for GMAC drivers to use. - -Signed-off-by: Chen-Yu Tsai <wens@csie.org> ---- - Documentation/devicetree/bindings/clock/sunxi.txt | 30 +++++++ - drivers/clk/sunxi/clk-sunxi.c | 96 +++++++++++++++++++++++ - 2 files changed, 126 insertions(+) - -diff --git a/Documentation/devicetree/bindings/clock/sunxi.txt b/Documentation/devicetree/bindings/clock/sunxi.txt -index 93d003c..0da774c 100644 ---- a/Documentation/devicetree/bindings/clock/sunxi.txt -+++ b/Documentation/devicetree/bindings/clock/sunxi.txt -@@ -37,6 +37,7 @@ Required properties: - "allwinner,sun6i-a31-apb2-gates-clk" - for the APB2 gates on A31 - "allwinner,sun4i-mod0-clk" - for the module 0 family of clocks - "allwinner,sun7i-a20-out-clk" - for the external output clocks -+ "allwinner,sun7i-a20-gmac-clk" - for the GMAC clock module on A20/A31 - - Required properties for all clocks: - - reg : shall be the control register address for the clock. -@@ -50,6 +51,9 @@ Required properties for all clocks: - If the clock module only has one output, the name shall be the - module name. - -+For "allwinner,sun7i-a20-gmac-clk", the parent clocks shall be fixed rate -+dummy clocks at 25 MHz and 125 MHz, respectively. See example. -+ - Clock consumers should specify the desired clocks they use with a - "clocks" phandle cell. Consumers that are using a gated clock should - provide an additional ID in their clock property. This ID is the -@@ -96,3 +100,29 @@ mmc0_clk: clk@01c20088 { - clocks = <&osc24M>, <&pll6 1>, <&pll5 1>; - clock-output-names = "mmc0"; - }; -+ -+mii_phy_tx_clk: clk@2 { -+ #clock-cells = <0>; -+ compatible = "fixed-clock"; -+ clock-frequency = <25000000>; -+ clock-output-names = "mii_phy_tx"; -+}; -+ -+gmac_int_tx_clk: clk@3 { -+ #clock-cells = <0>; -+ compatible = "fixed-clock"; -+ clock-frequency = <125000000>; -+ clock-output-names = "gmac_int_tx"; -+}; -+ -+gmac_clk: clk@01c20164 { -+ #clock-cells = <0>; -+ compatible = "allwinner,sun7i-a20-gmac-clk"; -+ reg = <0x01c20164 0x4>; -+ /* -+ * The first clock must be fixed at 25MHz; -+ * the second clock must be fixed at 125MHz -+ */ -+ clocks = <&mii_phy_tx_clk>, <&gmac_int_tx_clk>; -+ clock-output-names = "gmac"; -+}; -diff --git a/drivers/clk/sunxi/clk-sunxi.c b/drivers/clk/sunxi/clk-sunxi.c -index 0dce6fd..3283179 100644 ---- a/drivers/clk/sunxi/clk-sunxi.c -+++ b/drivers/clk/sunxi/clk-sunxi.c -@@ -404,6 +404,102 @@ static void sun7i_a20_get_out_factors(u32 *freq, u32 parent_rate, - - - /** -+ * 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); -+ -+ -+ -+/** - * sunxi_factors_clk_setup() - Setup function for factor clocks - */ - --- -1.8.5.5 - |