diff options
Diffstat (limited to 'target/linux/sunxi/patches-3.13/120-clk-sunxi-mod0.patch')
| -rw-r--r-- | target/linux/sunxi/patches-3.13/120-clk-sunxi-mod0.patch | 122 |
1 files changed, 0 insertions, 122 deletions
diff --git a/target/linux/sunxi/patches-3.13/120-clk-sunxi-mod0.patch b/target/linux/sunxi/patches-3.13/120-clk-sunxi-mod0.patch deleted file mode 100644 index 8432c3c..0000000 --- a/target/linux/sunxi/patches-3.13/120-clk-sunxi-mod0.patch +++ /dev/null @@ -1,122 +0,0 @@ -From bdc913d1ef5143a8728ae414fcb90f9ed87a58da Mon Sep 17 00:00:00 2001 -From: =?UTF-8?q?Emilio=20L=C3=B3pez?= <emilio@elopez.com.ar> -Date: Mon, 23 Dec 2013 00:32:39 -0300 -Subject: [PATCH] clk: sunxi: mod0 support -MIME-Version: 1.0 -Content-Type: text/plain; charset=UTF-8 -Content-Transfer-Encoding: 8bit - -This commit implements support for the "module 0" type of clocks, as -used by MMC, IR, NAND, SATA and other components. - -Signed-off-by: Emilio López <emilio@elopez.com.ar> -Acked-by: Mike Turquette <mturquette@linaro.org> ---- - Documentation/devicetree/bindings/clock/sunxi.txt | 5 +- - drivers/clk/sunxi/clk-sunxi.c | 57 +++++++++++++++++++++++ - 2 files changed, 61 insertions(+), 1 deletion(-) - ---- a/Documentation/devicetree/bindings/clock/sunxi.txt -+++ b/Documentation/devicetree/bindings/clock/sunxi.txt -@@ -35,10 +35,13 @@ Required properties: - "allwinner,sun7i-a20-apb1-gates-clk" - for the APB1 gates on A20 - "allwinner,sun6i-a31-apb2-div-clk" - for the APB2 gates on A31 - "allwinner,sun6i-a31-apb2-gates-clk" - for the APB2 gates on A31 -+ "allwinner,sun4i-mod0-clk" - for the module 0 family of clocks - - Required properties for all clocks: - - reg : shall be the control register address for the clock. --- clocks : shall be the input parent clock(s) phandle for the clock -+- clocks : shall be the input parent clock(s) phandle for the clock. For -+ multiplexed clocks, the list order must match the hardware -+ programming order. - - #clock-cells : from common clock binding; shall be set to 0 except for - "allwinner,*-gates-clk" where it shall be set to 1 - ---- a/drivers/clk/sunxi/clk-sunxi.c -+++ b/drivers/clk/sunxi/clk-sunxi.c -@@ -295,6 +295,47 @@ static void sun4i_get_apb1_factors(u32 * - - - /** -+ * sun4i_get_mod0_factors() - calculates m, n factors for MOD0-style clocks -+ * MMC rate is calculated as follows -+ * rate = (parent_rate >> p) / (m + 1); -+ */ -+ -+static void sun4i_get_mod0_factors(u32 *freq, u32 parent_rate, -+ u8 *n, u8 *k, u8 *m, u8 *p) -+{ -+ u8 div, calcm, calcp; -+ -+ /* These clocks can only divide, so we will never be able to achieve -+ * frequencies higher than the parent frequency */ -+ if (*freq > parent_rate) -+ *freq = parent_rate; -+ -+ div = parent_rate / *freq; -+ -+ if (div < 16) -+ calcp = 0; -+ else if (div / 2 < 16) -+ calcp = 1; -+ else if (div / 4 < 16) -+ calcp = 2; -+ else -+ calcp = 3; -+ -+ calcm = DIV_ROUND_UP(div, 1 << calcp); -+ -+ *freq = (parent_rate >> calcp) / calcm; -+ -+ /* we were called to round the frequency, we can now return */ -+ if (n == NULL) -+ return; -+ -+ *m = calcm - 1; -+ *p = calcp; -+} -+ -+ -+ -+/** - * sunxi_factors_clk_setup() - Setup function for factor clocks - */ - -@@ -341,6 +382,14 @@ static struct clk_factors_config sun4i_a - .pwidth = 2, - }; - -+/* user manual says "n" but it's really "p" */ -+static struct clk_factors_config sun4i_mod0_config = { -+ .mshift = 0, -+ .mwidth = 4, -+ .pshift = 16, -+ .pwidth = 2, -+}; -+ - static const struct factors_data sun4i_pll1_data __initconst = { - .enable = 31, - .table = &sun4i_pll1_config, -@@ -364,6 +413,13 @@ static const struct factors_data sun4i_a - .getter = sun4i_get_apb1_factors, - }; - -+static const struct factors_data sun4i_mod0_data __initconst = { -+ .enable = 31, -+ .mux = 24, -+ .table = &sun4i_mod0_config, -+ .getter = sun4i_get_mod0_factors, -+}; -+ - static struct clk * __init sunxi_factors_clk_setup(struct device_node *node, - const struct factors_data *data) - { -@@ -852,6 +908,7 @@ static const struct of_device_id clk_fac - {.compatible = "allwinner,sun4i-pll1-clk", .data = &sun4i_pll1_data,}, - {.compatible = "allwinner,sun6i-a31-pll1-clk", .data = &sun6i_a31_pll1_data,}, - {.compatible = "allwinner,sun4i-apb1-clk", .data = &sun4i_apb1_data,}, -+ {.compatible = "allwinner,sun4i-mod0-clk", .data = &sun4i_mod0_data,}, - {} - }; - |