diff options
Diffstat (limited to 'target/linux/sunxi/patches-3.13/255-clk-sunxi-add-a31-pll6.patch')
| -rw-r--r-- | target/linux/sunxi/patches-3.13/255-clk-sunxi-add-a31-pll6.patch | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/target/linux/sunxi/patches-3.13/255-clk-sunxi-add-a31-pll6.patch b/target/linux/sunxi/patches-3.13/255-clk-sunxi-add-a31-pll6.patch new file mode 100644 index 0000000..6e220e9 --- /dev/null +++ b/target/linux/sunxi/patches-3.13/255-clk-sunxi-add-a31-pll6.patch @@ -0,0 +1,111 @@ +From 92ef67c53ad92487c3c8de75e7940384c2edd793 Mon Sep 17 00:00:00 2001 +From: Maxime Ripard <maxime.ripard@free-electrons.com> +Date: Wed, 5 Feb 2014 14:05:03 +0100 +Subject: [PATCH] clk: sunxi: Add support for PLL6 on the A31 +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +The A31 has a slightly different PLL6 clock. Add support for this new clock in +our driver. + +Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com> +Signed-off-by: Emilio López <emilio@elopez.com.ar> +--- + Documentation/devicetree/bindings/clock/sunxi.txt | 1 + + drivers/clk/sunxi/clk-sunxi.c | 45 +++++++++++++++++++++++ + 2 files changed, 46 insertions(+) + +diff --git a/Documentation/devicetree/bindings/clock/sunxi.txt b/Documentation/devicetree/bindings/clock/sunxi.txt +index ca2b692..c37c764 100644 +--- a/Documentation/devicetree/bindings/clock/sunxi.txt ++++ b/Documentation/devicetree/bindings/clock/sunxi.txt +@@ -11,6 +11,7 @@ Required properties: + "allwinner,sun6i-a31-pll1-clk" - for the main PLL clock on A31 + "allwinner,sun4i-pll5-clk" - for the PLL5 clock + "allwinner,sun4i-pll6-clk" - for the PLL6 clock ++ "allwinner,sun6i-a31-pll6-clk" - for the PLL6 clock on A31 + "allwinner,sun4i-cpu-clk" - for the CPU multiplexer clock + "allwinner,sun4i-axi-clk" - for the AXI clock + "allwinner,sun4i-axi-gates-clk" - for the AXI gates +diff --git a/drivers/clk/sunxi/clk-sunxi.c b/drivers/clk/sunxi/clk-sunxi.c +index a779c31..d4cf297 100644 +--- a/drivers/clk/sunxi/clk-sunxi.c ++++ b/drivers/clk/sunxi/clk-sunxi.c +@@ -252,7 +252,38 @@ static void sun4i_get_pll5_factors(u32 *freq, u32 parent_rate, + *n = DIV_ROUND_UP(div, (*k+1)); + } + ++/** ++ * sun6i_a31_get_pll6_factors() - calculates n, k factors for A31 PLL6 ++ * PLL6 rate is calculated as follows ++ * rate = parent_rate * n * (k + 1) / 2 ++ * parent_rate is always 24Mhz ++ */ ++ ++static void sun6i_a31_get_pll6_factors(u32 *freq, u32 parent_rate, ++ u8 *n, u8 *k, u8 *m, u8 *p) ++{ ++ u8 div; ++ ++ /* ++ * We always have 24MHz / 2, so we can just say that our ++ * parent clock is 12MHz. ++ */ ++ parent_rate = parent_rate / 2; ++ ++ /* Normalize value to a parent_rate multiple (24M / 2) */ ++ div = *freq / parent_rate; ++ *freq = parent_rate * div; ++ ++ /* we were called to round the frequency, we can now return */ ++ if (n == NULL) ++ return; ++ ++ *k = div / 32; ++ if (*k > 3) ++ *k = 3; + ++ *n = DIV_ROUND_UP(div, (*k+1)); ++} + + /** + * sun4i_get_apb1_factors() - calculates m, p factors for APB1 +@@ -420,6 +451,13 @@ struct factors_data { + .kwidth = 2, + }; + ++static struct clk_factors_config sun6i_a31_pll6_config = { ++ .nshift = 8, ++ .nwidth = 5, ++ .kshift = 4, ++ .kwidth = 2, ++}; ++ + static struct clk_factors_config sun4i_apb1_config = { + .mshift = 0, + .mwidth = 5, +@@ -469,6 +507,12 @@ struct factors_data { + .name = "pll6", + }; + ++static const struct factors_data sun6i_a31_pll6_data __initconst = { ++ .enable = 31, ++ .table = &sun6i_a31_pll6_config, ++ .getter = sun6i_a31_get_pll6_factors, ++}; ++ + static const struct factors_data sun4i_apb1_data __initconst = { + .table = &sun4i_apb1_config, + .getter = sun4i_get_apb1_factors, +@@ -1069,6 +1113,7 @@ static void __init sunxi_divs_clk_setup(struct device_node *node, + static const struct of_device_id clk_factors_match[] __initconst = { + {.compatible = "allwinner,sun4i-pll1-clk", .data = &sun4i_pll1_data,}, + {.compatible = "allwinner,sun6i-a31-pll1-clk", .data = &sun6i_a31_pll1_data,}, ++ {.compatible = "allwinner,sun6i-a31-pll6-clk", .data = &sun6i_a31_pll6_data,}, + {.compatible = "allwinner,sun4i-apb1-clk", .data = &sun4i_apb1_data,}, + {.compatible = "allwinner,sun4i-mod0-clk", .data = &sun4i_mod0_data,}, + {.compatible = "allwinner,sun7i-a20-out-clk", .data = &sun7i_a20_out_data,}, +-- +1.8.5.5 + |