diff options
Diffstat (limited to 'target/linux/sunxi/patches-3.12/103-clk-sunxi_add_pll5-6.patch')
| -rw-r--r-- | target/linux/sunxi/patches-3.12/103-clk-sunxi_add_pll5-6.patch | 309 |
1 files changed, 309 insertions, 0 deletions
diff --git a/target/linux/sunxi/patches-3.12/103-clk-sunxi_add_pll5-6.patch b/target/linux/sunxi/patches-3.12/103-clk-sunxi_add_pll5-6.patch new file mode 100644 index 0000000000..f680a42e1f --- /dev/null +++ b/target/linux/sunxi/patches-3.12/103-clk-sunxi_add_pll5-6.patch @@ -0,0 +1,309 @@ +From cad227619badf2a0ff2593d9935fedc84d5ef1ef Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Emilio=20L=C3=B3pez?= <emilio@elopez.com.ar> +Date: Sun, 26 May 2013 14:23:50 -0300 +Subject: [PATCH] clk: sunxi: add PLL5 and PLL6 support +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +This commit implements PLL5 and PLL6 support on the sunxi clock driver. +These PLLs use a similar factor clock, but differ on their outputs. + +Signed-off-by: Emilio López <emilio@elopez.com.ar> +--- + Documentation/devicetree/bindings/clock/sunxi.txt | 2 + + drivers/clk/sunxi/clk-sunxi.c | 182 +++++++++++++++++++++- + 2 files changed, 177 insertions(+), 7 deletions(-) + +diff --git a/Documentation/devicetree/bindings/clock/sunxi.txt b/Documentation/devicetree/bindings/clock/sunxi.txt +index 7d9245f..773f3ae 100644 +--- a/Documentation/devicetree/bindings/clock/sunxi.txt ++++ b/Documentation/devicetree/bindings/clock/sunxi.txt +@@ -9,6 +9,8 @@ Required properties: + "allwinner,sun4i-osc-clk" - for a gatable oscillator + "allwinner,sun4i-pll1-clk" - for the main PLL clock and PLL4 + "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,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 c0b0675..6947ba9 100644 +--- a/drivers/clk/sunxi/clk-sunxi.c ++++ b/drivers/clk/sunxi/clk-sunxi.c +@@ -210,6 +210,40 @@ static void sun6i_a31_get_pll1_factors(u32 *freq, u32 parent_rate, + } + + /** ++ * sun4i_get_pll5_factors() - calculates n, k factors for PLL5 ++ * PLL5 rate is calculated as follows ++ * rate = parent_rate * n * (k + 1) ++ * parent_rate is always 24Mhz ++ */ ++ ++static void sun4i_get_pll5_factors(u32 *freq, u32 parent_rate, ++ u8 *n, u8 *k, u8 *m, u8 *p) ++{ ++ u8 div; ++ ++ /* Normalize value to a 24M multiple */ ++ div = *freq / 24000000; ++ *freq = 24000000 * div; ++ ++ /* we were called to round the frequency, we can now return */ ++ if (n == NULL) ++ return; ++ ++ if (div < 31) ++ *k = 0; ++ else if (div / 2 < 31) ++ *k = 1; ++ else if (div / 3 < 31) ++ *k = 2; ++ else ++ *k = 3; ++ ++ *n = DIV_ROUND_UP(div, (*k+1)); ++} ++ ++ ++ ++/** + * sun4i_get_apb1_factors() - calculates m, p factors for APB1 + * APB1 rate is calculated as follows + * rate = (parent_rate >> p) / (m + 1); +@@ -285,6 +319,13 @@ struct factors_data { + .mwidth = 2, + }; + ++static struct clk_factors_config sun4i_pll5_config = { ++ .nshift = 8, ++ .nwidth = 5, ++ .kshift = 4, ++ .kwidth = 2, ++}; ++ + static struct clk_factors_config sun4i_apb1_config = { + .mshift = 0, + .mwidth = 5, +@@ -304,13 +345,19 @@ struct factors_data { + .getter = sun6i_a31_get_pll1_factors, + }; + ++static const struct factors_data sun4i_pll5_data __initconst = { ++ .enable = 31, ++ .table = &sun4i_pll5_config, ++ .getter = sun4i_get_pll5_factors, ++}; ++ + static const struct factors_data sun4i_apb1_data __initconst = { + .table = &sun4i_apb1_config, + .getter = sun4i_get_apb1_factors, + }; + +-static void __init sunxi_factors_clk_setup(struct device_node *node, +- struct factors_data *data) ++static struct clk * __init sunxi_factors_clk_setup(struct device_node *node, ++ const struct factors_data *data) + { + struct clk *clk; + struct clk_factors *factors; +@@ -321,6 +368,7 @@ static void __init sunxi_factors_clk_setup(struct device_node *node, + const char *clk_name = node->name; + const char *parents[5]; + void *reg; ++ unsigned long flags; + int i = 0; + + reg = of_iomap(node, 0); +@@ -331,14 +379,14 @@ static void __init sunxi_factors_clk_setup(struct device_node *node, + + factors = kzalloc(sizeof(struct clk_factors), GFP_KERNEL); + if (!factors) +- return; ++ return NULL; + + /* Add a gate if this factor clock can be gated */ + if (data->enable) { + gate = kzalloc(sizeof(struct clk_gate), GFP_KERNEL); + if (!gate) { + kfree(factors); +- return; ++ return NULL; + } + + /* set up gate properties */ +@@ -354,7 +402,7 @@ static void __init sunxi_factors_clk_setup(struct device_node *node, + if (!mux) { + kfree(factors); + kfree(gate); +- return; ++ return NULL; + } + + /* set up gate properties */ +@@ -371,17 +419,21 @@ static void __init sunxi_factors_clk_setup(struct device_node *node, + factors->get_factors = data->getter; + factors->lock = &clk_lock; + ++ /* We should not disable pll5, it powers the RAM */ ++ flags = !strcmp("pll5", clk_name) ? CLK_IGNORE_UNUSED : 0; ++ + clk = clk_register_composite(NULL, clk_name, + parents, i, + mux_hw, &clk_mux_ops, + &factors->hw, &clk_factors_ops, +- gate_hw, &clk_gate_ops, +- i ? 0 : CLK_IS_ROOT); ++ gate_hw, &clk_gate_ops, flags); + + if (!IS_ERR(clk)) { + of_clk_add_provider(node, of_clk_src_simple_get, clk); + clk_register_clkdev(clk, clk_name, NULL); + } ++ ++ return clk; + } + + +@@ -616,6 +668,112 @@ static void __init sunxi_gates_clk_setup(struct device_node *node, + of_clk_add_provider(node, of_clk_src_onecell_get, clk_data); + } + ++ ++ ++/** ++ * sunxi_divs_clk_setup() - Setup function for leaf divisors on clocks ++ */ ++ ++#define SUNXI_DIVS_MAX_QTY 2 ++#define SUNXI_DIVISOR_WIDTH 2 ++ ++struct divs_data { ++ const struct factors_data *factors; /* data for the factor clock */ ++ struct { ++ u8 fixed; /* is it a fixed divisor? if not... */ ++ struct clk_div_table *table; /* is it a table based divisor? */ ++ u8 shift; /* otherwise it's a normal divisor with this shift */ ++ u8 pow; /* is it power-of-two based? */ ++ } div[SUNXI_DIVS_MAX_QTY]; ++}; ++ ++static struct clk_div_table pll6_sata_table[] = { ++ { .val = 0, .div = 6, }, ++ { .val = 1, .div = 12, }, ++ { .val = 2, .div = 18, }, ++ { .val = 3, .div = 24, }, ++ { } /* sentinel */ ++}; ++ ++static const struct divs_data pll5_divs_data __initconst = { ++ .factors = &sun4i_pll5_data, ++ .div = { ++ { .shift = 0, .pow = 0, }, /* M, DDR */ ++ { .shift = 16, .pow = 1, }, /* P, other */ ++ } ++}; ++ ++static const struct divs_data pll6_divs_data __initconst = { ++ .factors = &sun4i_pll5_data, ++ .div = { ++ { .shift = 0, .table = pll6_sata_table }, /* M, SATA */ ++ { .fixed = 2 }, /* P, other */ ++ } ++}; ++ ++static void __init sunxi_divs_clk_setup(struct device_node *node, ++ struct divs_data *data) ++{ ++ struct clk_onecell_data *clk_data; ++ const char *parent = node->name; ++ const char *clk_name; ++ struct clk **clks, *pclk; ++ void *reg; ++ int i = 0; ++ int flags, clkflags; ++ ++ /* Set up factor clock that we will be dividing */ ++ pclk = sunxi_factors_clk_setup(node, data->factors); ++ ++ reg = of_iomap(node, 0); ++ ++ clk_data = kmalloc(sizeof(struct clk_onecell_data), GFP_KERNEL); ++ if (!clk_data) ++ return; ++ clks = kzalloc(SUNXI_DIVS_MAX_QTY * sizeof(struct clk *), GFP_KERNEL); ++ if (!clks) { ++ kfree(clk_data); ++ return; ++ } ++ clk_data->clks = clks; ++ ++ /* It's not a good idea to have automatic reparenting changing ++ * our RAM clock! */ ++ clkflags = !strcmp("pll5", parent) ? 0 : CLK_SET_RATE_PARENT; ++ ++ for (i = 0; i < SUNXI_DIVS_MAX_QTY; i++) { ++ if (of_property_read_string_index(node, "clock-output-names", ++ i, &clk_name) != 0) ++ break; ++ ++ if (data->div[i].fixed) { ++ clks[i] = clk_register_fixed_factor(NULL, clk_name, ++ parent, clkflags, ++ 1, data->div[i].fixed); ++ } else { ++ flags = data->div[i].pow ? CLK_DIVIDER_POWER_OF_TWO : 0; ++ clks[i] = clk_register_divider_table(NULL, clk_name, ++ parent, clkflags, reg, ++ data->div[i].shift, ++ SUNXI_DIVISOR_WIDTH, flags, ++ data->div[i].table, &clk_lock); ++ } ++ ++ WARN_ON(IS_ERR(clk_data->clks[i])); ++ clk_register_clkdev(clks[i], clk_name, NULL); ++ } ++ ++ /* The last clock available on the getter is the parent */ ++ clks[i++] = pclk; ++ ++ /* Adjust to the real max */ ++ clk_data->clk_num = i; ++ ++ of_clk_add_provider(node, of_clk_src_onecell_get, clk_data); ++} ++ ++ ++ + /* Matches for factors clocks */ + static const struct of_device_id clk_factors_match[] __initconst = { + {.compatible = "allwinner,sun4i-pll1-clk", .data = &sun4i_pll1_data,}, +@@ -633,6 +791,13 @@ static void __init sunxi_gates_clk_setup(struct device_node *node, + {} + }; + ++/* Matches for divided outputs */ ++static const struct of_device_id clk_divs_match[] __initconst = { ++ {.compatible = "allwinner,sun4i-pll5-clk", .data = &pll5_divs_data,}, ++ {.compatible = "allwinner,sun4i-pll6-clk", .data = &pll6_divs_data,}, ++ {} ++}; ++ + /* Matches for mux clocks */ + static const struct of_device_id clk_mux_match[] __initconst = { + {.compatible = "allwinner,sun4i-cpu-clk", .data = &sun4i_cpu_mux_data,}, +@@ -688,6 +853,9 @@ void __init sunxi_init_clocks(void) + /* Register divider clocks */ + of_sunxi_table_clock_setup(clk_div_match, sunxi_divider_clk_setup); + ++ /* Register divided output clocks */ ++ of_sunxi_table_clock_setup(clk_divs_match, sunxi_divs_clk_setup); ++ + /* Register mux clocks */ + of_sunxi_table_clock_setup(clk_mux_match, sunxi_mux_clk_setup); + +-- +1.8.4 + |