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authorTero Kristo <t-kristo@ti.com>2013-06-12 17:04:34 +0400
committerMike Turquette <mturquette@linaro.org>2014-01-18 00:34:55 +0400
commitf38b0dd63f0d0cca753bf0997eefdfb23dcc9518 (patch)
tree9945b442a5015de45cefcf9d3d91bcd8c2a28016 /drivers/clk/ti/dpll.c
parent819b4861c18d602463cfe815041d11fd81002654 (diff)
downloadlinux-f38b0dd63f0d0cca753bf0997eefdfb23dcc9518.tar.xz
CLK: TI: Add DPLL clock support
The OMAP clock driver now supports DPLL clock type. This patch also adds support for DT DPLL nodes. Signed-off-by: Tero Kristo <t-kristo@ti.com> Acked-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Mike Turquette <mturquette@linaro.org>
Diffstat (limited to 'drivers/clk/ti/dpll.c')
-rw-r--r--drivers/clk/ti/dpll.c558
1 files changed, 558 insertions, 0 deletions
diff --git a/drivers/clk/ti/dpll.c b/drivers/clk/ti/dpll.c
new file mode 100644
index 000000000000..7e498a44f97d
--- /dev/null
+++ b/drivers/clk/ti/dpll.c
@@ -0,0 +1,558 @@
+/*
+ * OMAP DPLL clock support
+ *
+ * Copyright (C) 2013 Texas Instruments, Inc.
+ *
+ * Tero Kristo <t-kristo@ti.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/clk-provider.h>
+#include <linux/slab.h>
+#include <linux/err.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/clk/ti.h>
+
+#undef pr_fmt
+#define pr_fmt(fmt) "%s: " fmt, __func__
+
+#define DPLL_HAS_AUTOIDLE 0x1
+
+#if defined(CONFIG_ARCH_OMAP4) || defined(CONFIG_SOC_OMAP5) || \
+ defined(CONFIG_SOC_DRA7XX)
+static const struct clk_ops dpll_m4xen_ck_ops = {
+ .enable = &omap3_noncore_dpll_enable,
+ .disable = &omap3_noncore_dpll_disable,
+ .recalc_rate = &omap4_dpll_regm4xen_recalc,
+ .round_rate = &omap4_dpll_regm4xen_round_rate,
+ .set_rate = &omap3_noncore_dpll_set_rate,
+ .get_parent = &omap2_init_dpll_parent,
+};
+#endif
+
+static const struct clk_ops dpll_core_ck_ops = {
+ .recalc_rate = &omap3_dpll_recalc,
+ .get_parent = &omap2_init_dpll_parent,
+};
+
+#ifdef CONFIG_ARCH_OMAP3
+static const struct clk_ops omap3_dpll_core_ck_ops = {
+ .get_parent = &omap2_init_dpll_parent,
+ .recalc_rate = &omap3_dpll_recalc,
+ .round_rate = &omap2_dpll_round_rate,
+};
+#endif
+
+static const struct clk_ops dpll_ck_ops = {
+ .enable = &omap3_noncore_dpll_enable,
+ .disable = &omap3_noncore_dpll_disable,
+ .recalc_rate = &omap3_dpll_recalc,
+ .round_rate = &omap2_dpll_round_rate,
+ .set_rate = &omap3_noncore_dpll_set_rate,
+ .get_parent = &omap2_init_dpll_parent,
+};
+
+static const struct clk_ops dpll_no_gate_ck_ops = {
+ .recalc_rate = &omap3_dpll_recalc,
+ .get_parent = &omap2_init_dpll_parent,
+ .round_rate = &omap2_dpll_round_rate,
+ .set_rate = &omap3_noncore_dpll_set_rate,
+};
+
+#ifdef CONFIG_ARCH_OMAP3
+static const struct clk_ops omap3_dpll_ck_ops = {
+ .enable = &omap3_noncore_dpll_enable,
+ .disable = &omap3_noncore_dpll_disable,
+ .get_parent = &omap2_init_dpll_parent,
+ .recalc_rate = &omap3_dpll_recalc,
+ .set_rate = &omap3_noncore_dpll_set_rate,
+ .round_rate = &omap2_dpll_round_rate,
+};
+
+static const struct clk_ops omap3_dpll_per_ck_ops = {
+ .enable = &omap3_noncore_dpll_enable,
+ .disable = &omap3_noncore_dpll_disable,
+ .get_parent = &omap2_init_dpll_parent,
+ .recalc_rate = &omap3_dpll_recalc,
+ .set_rate = &omap3_dpll4_set_rate,
+ .round_rate = &omap2_dpll_round_rate,
+};
+#endif
+
+static const struct clk_ops dpll_x2_ck_ops = {
+ .recalc_rate = &omap3_clkoutx2_recalc,
+};
+
+/**
+ * ti_clk_register_dpll - low level registration of a DPLL clock
+ * @hw: hardware clock definition for the clock
+ * @node: device node for the clock
+ *
+ * Finalizes DPLL registration process. In case a failure (clk-ref or
+ * clk-bypass is missing), the clock is added to retry list and
+ * the initialization is retried on later stage.
+ */
+static void __init ti_clk_register_dpll(struct clk_hw *hw,
+ struct device_node *node)
+{
+ struct clk_hw_omap *clk_hw = to_clk_hw_omap(hw);
+ struct dpll_data *dd = clk_hw->dpll_data;
+ struct clk *clk;
+
+ dd->clk_ref = of_clk_get(node, 0);
+ dd->clk_bypass = of_clk_get(node, 1);
+
+ if (IS_ERR(dd->clk_ref) || IS_ERR(dd->clk_bypass)) {
+ pr_debug("clk-ref or clk-bypass missing for %s, retry later\n",
+ node->name);
+ if (!ti_clk_retry_init(node, hw, ti_clk_register_dpll))
+ return;
+
+ goto cleanup;
+ }
+
+ /* register the clock */
+ clk = clk_register(NULL, &clk_hw->hw);
+
+ if (!IS_ERR(clk)) {
+ omap2_init_clk_hw_omap_clocks(clk);
+ of_clk_add_provider(node, of_clk_src_simple_get, clk);
+ kfree(clk_hw->hw.init->parent_names);
+ kfree(clk_hw->hw.init);
+ return;
+ }
+
+cleanup:
+ kfree(clk_hw->dpll_data);
+ kfree(clk_hw->hw.init->parent_names);
+ kfree(clk_hw->hw.init);
+ kfree(clk_hw);
+}
+
+#if defined(CONFIG_ARCH_OMAP4) || defined(CONFIG_SOC_OMAP5) || \
+ defined(CONFIG_SOC_DRA7XX) || defined(CONFIG_SOC_AM33XX)
+/**
+ * ti_clk_register_dpll_x2 - Registers a DPLLx2 clock
+ * @node: device node for this clock
+ * @ops: clk_ops for this clock
+ * @hw_ops: clk_hw_ops for this clock
+ *
+ * Initializes a DPLL x 2 clock from device tree data.
+ */
+static void ti_clk_register_dpll_x2(struct device_node *node,
+ const struct clk_ops *ops,
+ const struct clk_hw_omap_ops *hw_ops)
+{
+ struct clk *clk;
+ struct clk_init_data init = { NULL };
+ struct clk_hw_omap *clk_hw;
+ const char *name = node->name;
+ const char *parent_name;
+
+ parent_name = of_clk_get_parent_name(node, 0);
+ if (!parent_name) {
+ pr_err("%s must have parent\n", node->name);
+ return;
+ }
+
+ clk_hw = kzalloc(sizeof(*clk_hw), GFP_KERNEL);
+ if (!clk_hw)
+ return;
+
+ clk_hw->ops = hw_ops;
+ clk_hw->hw.init = &init;
+
+ init.name = name;
+ init.ops = ops;
+ init.parent_names = &parent_name;
+ init.num_parents = 1;
+
+ /* register the clock */
+ clk = clk_register(NULL, &clk_hw->hw);
+
+ if (IS_ERR(clk)) {
+ kfree(clk_hw);
+ } else {
+ omap2_init_clk_hw_omap_clocks(clk);
+ of_clk_add_provider(node, of_clk_src_simple_get, clk);
+ }
+}
+#endif
+
+/**
+ * of_ti_dpll_setup - Setup function for OMAP DPLL clocks
+ * @node: device node containing the DPLL info
+ * @ops: ops for the DPLL
+ * @ddt: DPLL data template to use
+ * @init_flags: flags for controlling init types
+ *
+ * Initializes a DPLL clock from device tree data.
+ */
+static void __init of_ti_dpll_setup(struct device_node *node,
+ const struct clk_ops *ops,
+ const struct dpll_data *ddt,
+ u8 init_flags)
+{
+ struct clk_hw_omap *clk_hw = NULL;
+ struct clk_init_data *init = NULL;
+ const char **parent_names = NULL;
+ struct dpll_data *dd = NULL;
+ int i;
+ u8 dpll_mode = 0;
+
+ dd = kzalloc(sizeof(*dd), GFP_KERNEL);
+ clk_hw = kzalloc(sizeof(*clk_hw), GFP_KERNEL);
+ init = kzalloc(sizeof(*init), GFP_KERNEL);
+ if (!dd || !clk_hw || !init)
+ goto cleanup;
+
+ memcpy(dd, ddt, sizeof(*dd));
+
+ clk_hw->dpll_data = dd;
+ clk_hw->ops = &clkhwops_omap3_dpll;
+ clk_hw->hw.init = init;
+ clk_hw->flags = MEMMAP_ADDRESSING;
+
+ init->name = node->name;
+ init->ops = ops;
+
+ init->num_parents = of_clk_get_parent_count(node);
+ if (init->num_parents < 1) {
+ pr_err("%s must have parent(s)\n", node->name);
+ goto cleanup;
+ }
+
+ parent_names = kzalloc(sizeof(char *) * init->num_parents, GFP_KERNEL);
+ if (!parent_names)
+ goto cleanup;
+
+ for (i = 0; i < init->num_parents; i++)
+ parent_names[i] = of_clk_get_parent_name(node, i);
+
+ init->parent_names = parent_names;
+
+ dd->control_reg = ti_clk_get_reg_addr(node, 0);
+ dd->idlest_reg = ti_clk_get_reg_addr(node, 1);
+ dd->mult_div1_reg = ti_clk_get_reg_addr(node, 2);
+
+ if (!dd->control_reg || !dd->idlest_reg || !dd->mult_div1_reg)
+ goto cleanup;
+
+ if (init_flags & DPLL_HAS_AUTOIDLE) {
+ dd->autoidle_reg = ti_clk_get_reg_addr(node, 3);
+ if (!dd->autoidle_reg)
+ goto cleanup;
+ }
+
+ if (of_property_read_bool(node, "ti,low-power-stop"))
+ dpll_mode |= 1 << DPLL_LOW_POWER_STOP;
+
+ if (of_property_read_bool(node, "ti,low-power-bypass"))
+ dpll_mode |= 1 << DPLL_LOW_POWER_BYPASS;
+
+ if (of_property_read_bool(node, "ti,lock"))
+ dpll_mode |= 1 << DPLL_LOCKED;
+
+ if (dpll_mode)
+ dd->modes = dpll_mode;
+
+ ti_clk_register_dpll(&clk_hw->hw, node);
+ return;
+
+cleanup:
+ kfree(dd);
+ kfree(parent_names);
+ kfree(init);
+ kfree(clk_hw);
+}
+
+#if defined(CONFIG_ARCH_OMAP4) || defined(CONFIG_SOC_OMAP5) || \
+ defined(CONFIG_SOC_DRA7XX)
+static void __init of_ti_omap4_dpll_x2_setup(struct device_node *node)
+{
+ ti_clk_register_dpll_x2(node, &dpll_x2_ck_ops, &clkhwops_omap4_dpllmx);
+}
+CLK_OF_DECLARE(ti_omap4_dpll_x2_clock, "ti,omap4-dpll-x2-clock",
+ of_ti_omap4_dpll_x2_setup);
+#endif
+
+#ifdef CONFIG_SOC_AM33XX
+static void __init of_ti_am3_dpll_x2_setup(struct device_node *node)
+{
+ ti_clk_register_dpll_x2(node, &dpll_x2_ck_ops, NULL);
+}
+CLK_OF_DECLARE(ti_am3_dpll_x2_clock, "ti,am3-dpll-x2-clock",
+ of_ti_am3_dpll_x2_setup);
+#endif
+
+#ifdef CONFIG_ARCH_OMAP3
+static void __init of_ti_omap3_dpll_setup(struct device_node *node)
+{
+ const struct dpll_data dd = {
+ .idlest_mask = 0x1,
+ .enable_mask = 0x7,
+ .autoidle_mask = 0x7,
+ .mult_mask = 0x7ff << 8,
+ .div1_mask = 0x7f,
+ .max_multiplier = 2047,
+ .max_divider = 128,
+ .min_divider = 1,
+ .freqsel_mask = 0xf0,
+ .modes = (1 << DPLL_LOW_POWER_BYPASS) | (1 << DPLL_LOCKED),
+ };
+
+ of_ti_dpll_setup(node, &omap3_dpll_ck_ops, &dd, DPLL_HAS_AUTOIDLE);
+}
+CLK_OF_DECLARE(ti_omap3_dpll_clock, "ti,omap3-dpll-clock",
+ of_ti_omap3_dpll_setup);
+
+static void __init of_ti_omap3_core_dpll_setup(struct device_node *node)
+{
+ const struct dpll_data dd = {
+ .idlest_mask = 0x1,
+ .enable_mask = 0x7,
+ .autoidle_mask = 0x7,
+ .mult_mask = 0x7ff << 16,
+ .div1_mask = 0x7f << 8,
+ .max_multiplier = 2047,
+ .max_divider = 128,
+ .min_divider = 1,
+ .freqsel_mask = 0xf0,
+ };
+
+ of_ti_dpll_setup(node, &omap3_dpll_core_ck_ops, &dd, DPLL_HAS_AUTOIDLE);
+}
+CLK_OF_DECLARE(ti_omap3_core_dpll_clock, "ti,omap3-dpll-core-clock",
+ of_ti_omap3_core_dpll_setup);
+
+static void __init of_ti_omap3_per_dpll_setup(struct device_node *node)
+{
+ const struct dpll_data dd = {
+ .idlest_mask = 0x1 << 1,
+ .enable_mask = 0x7 << 16,
+ .autoidle_mask = 0x7 << 3,
+ .mult_mask = 0x7ff << 8,
+ .div1_mask = 0x7f,
+ .max_multiplier = 2047,
+ .max_divider = 128,
+ .min_divider = 1,
+ .freqsel_mask = 0xf00000,
+ .modes = (1 << DPLL_LOW_POWER_STOP) | (1 << DPLL_LOCKED),
+ };
+
+ of_ti_dpll_setup(node, &omap3_dpll_per_ck_ops, &dd, DPLL_HAS_AUTOIDLE);
+}
+CLK_OF_DECLARE(ti_omap3_per_dpll_clock, "ti,omap3-dpll-per-clock",
+ of_ti_omap3_per_dpll_setup);
+
+static void __init of_ti_omap3_per_jtype_dpll_setup(struct device_node *node)
+{
+ const struct dpll_data dd = {
+ .idlest_mask = 0x1 << 1,
+ .enable_mask = 0x7 << 16,
+ .autoidle_mask = 0x7 << 3,
+ .mult_mask = 0xfff << 8,
+ .div1_mask = 0x7f,
+ .max_multiplier = 4095,
+ .max_divider = 128,
+ .min_divider = 1,
+ .sddiv_mask = 0xff << 24,
+ .dco_mask = 0xe << 20,
+ .flags = DPLL_J_TYPE,
+ .modes = (1 << DPLL_LOW_POWER_STOP) | (1 << DPLL_LOCKED),
+ };
+
+ of_ti_dpll_setup(node, &omap3_dpll_per_ck_ops, &dd, DPLL_HAS_AUTOIDLE);
+}
+CLK_OF_DECLARE(ti_omap3_per_jtype_dpll_clock, "ti,omap3-dpll-per-j-type-clock",
+ of_ti_omap3_per_jtype_dpll_setup);
+#endif
+
+static void __init of_ti_omap4_dpll_setup(struct device_node *node)
+{
+ const struct dpll_data dd = {
+ .idlest_mask = 0x1,
+ .enable_mask = 0x7,
+ .autoidle_mask = 0x7,
+ .mult_mask = 0x7ff << 8,
+ .div1_mask = 0x7f,
+ .max_multiplier = 2047,
+ .max_divider = 128,
+ .min_divider = 1,
+ .modes = (1 << DPLL_LOW_POWER_BYPASS) | (1 << DPLL_LOCKED),
+ };
+
+ of_ti_dpll_setup(node, &dpll_ck_ops, &dd, DPLL_HAS_AUTOIDLE);
+}
+CLK_OF_DECLARE(ti_omap4_dpll_clock, "ti,omap4-dpll-clock",
+ of_ti_omap4_dpll_setup);
+
+static void __init of_ti_omap4_core_dpll_setup(struct device_node *node)
+{
+ const struct dpll_data dd = {
+ .idlest_mask = 0x1,
+ .enable_mask = 0x7,
+ .autoidle_mask = 0x7,
+ .mult_mask = 0x7ff << 8,
+ .div1_mask = 0x7f,
+ .max_multiplier = 2047,
+ .max_divider = 128,
+ .min_divider = 1,
+ .modes = (1 << DPLL_LOW_POWER_BYPASS) | (1 << DPLL_LOCKED),
+ };
+
+ of_ti_dpll_setup(node, &dpll_core_ck_ops, &dd, DPLL_HAS_AUTOIDLE);
+}
+CLK_OF_DECLARE(ti_omap4_core_dpll_clock, "ti,omap4-dpll-core-clock",
+ of_ti_omap4_core_dpll_setup);
+
+#if defined(CONFIG_ARCH_OMAP4) || defined(CONFIG_SOC_OMAP5) || \
+ defined(CONFIG_SOC_DRA7XX)
+static void __init of_ti_omap4_m4xen_dpll_setup(struct device_node *node)
+{
+ const struct dpll_data dd = {
+ .idlest_mask = 0x1,
+ .enable_mask = 0x7,
+ .autoidle_mask = 0x7,
+ .mult_mask = 0x7ff << 8,
+ .div1_mask = 0x7f,
+ .max_multiplier = 2047,
+ .max_divider = 128,
+ .min_divider = 1,
+ .m4xen_mask = 0x800,
+ .lpmode_mask = 1 << 10,
+ .modes = (1 << DPLL_LOW_POWER_BYPASS) | (1 << DPLL_LOCKED),
+ };
+
+ of_ti_dpll_setup(node, &dpll_m4xen_ck_ops, &dd, DPLL_HAS_AUTOIDLE);
+}
+CLK_OF_DECLARE(ti_omap4_m4xen_dpll_clock, "ti,omap4-dpll-m4xen-clock",
+ of_ti_omap4_m4xen_dpll_setup);
+
+static void __init of_ti_omap4_jtype_dpll_setup(struct device_node *node)
+{
+ const struct dpll_data dd = {
+ .idlest_mask = 0x1,
+ .enable_mask = 0x7,
+ .autoidle_mask = 0x7,
+ .mult_mask = 0xfff << 8,
+ .div1_mask = 0xff,
+ .max_multiplier = 4095,
+ .max_divider = 256,
+ .min_divider = 1,
+ .sddiv_mask = 0xff << 24,
+ .flags = DPLL_J_TYPE,
+ .modes = (1 << DPLL_LOW_POWER_BYPASS) | (1 << DPLL_LOCKED),
+ };
+
+ of_ti_dpll_setup(node, &dpll_m4xen_ck_ops, &dd, DPLL_HAS_AUTOIDLE);
+}
+CLK_OF_DECLARE(ti_omap4_jtype_dpll_clock, "ti,omap4-dpll-j-type-clock",
+ of_ti_omap4_jtype_dpll_setup);
+#endif
+
+static void __init of_ti_am3_no_gate_dpll_setup(struct device_node *node)
+{
+ const struct dpll_data dd = {
+ .idlest_mask = 0x1,
+ .enable_mask = 0x7,
+ .autoidle_mask = 0x7,
+ .mult_mask = 0x7ff << 8,
+ .div1_mask = 0x7f,
+ .max_multiplier = 2047,
+ .max_divider = 128,
+ .min_divider = 1,
+ .modes = (1 << DPLL_LOW_POWER_BYPASS) | (1 << DPLL_LOCKED),
+ };
+
+ of_ti_dpll_setup(node, &dpll_no_gate_ck_ops, &dd, 0);
+}
+CLK_OF_DECLARE(ti_am3_no_gate_dpll_clock, "ti,am3-dpll-no-gate-clock",
+ of_ti_am3_no_gate_dpll_setup);
+
+static void __init of_ti_am3_jtype_dpll_setup(struct device_node *node)
+{
+ const struct dpll_data dd = {
+ .idlest_mask = 0x1,
+ .enable_mask = 0x7,
+ .autoidle_mask = 0x7,
+ .mult_mask = 0x7ff << 8,
+ .div1_mask = 0x7f,
+ .max_multiplier = 4095,
+ .max_divider = 256,
+ .min_divider = 2,
+ .flags = DPLL_J_TYPE,
+ .modes = (1 << DPLL_LOW_POWER_BYPASS) | (1 << DPLL_LOCKED),
+ };
+
+ of_ti_dpll_setup(node, &dpll_ck_ops, &dd, 0);
+}
+CLK_OF_DECLARE(ti_am3_jtype_dpll_clock, "ti,am3-dpll-j-type-clock",
+ of_ti_am3_jtype_dpll_setup);
+
+static void __init of_ti_am3_no_gate_jtype_dpll_setup(struct device_node *node)
+{
+ const struct dpll_data dd = {
+ .idlest_mask = 0x1,
+ .enable_mask = 0x7,
+ .autoidle_mask = 0x7,
+ .mult_mask = 0x7ff << 8,
+ .div1_mask = 0x7f,
+ .max_multiplier = 2047,
+ .max_divider = 128,
+ .min_divider = 1,
+ .flags = DPLL_J_TYPE,
+ .modes = (1 << DPLL_LOW_POWER_BYPASS) | (1 << DPLL_LOCKED),
+ };
+
+ of_ti_dpll_setup(node, &dpll_no_gate_ck_ops, &dd, 0);
+}
+CLK_OF_DECLARE(ti_am3_no_gate_jtype_dpll_clock,
+ "ti,am3-dpll-no-gate-j-type-clock",
+ of_ti_am3_no_gate_jtype_dpll_setup);
+
+static void __init of_ti_am3_dpll_setup(struct device_node *node)
+{
+ const struct dpll_data dd = {
+ .idlest_mask = 0x1,
+ .enable_mask = 0x7,
+ .autoidle_mask = 0x7,
+ .mult_mask = 0x7ff << 8,
+ .div1_mask = 0x7f,
+ .max_multiplier = 2047,
+ .max_divider = 128,
+ .min_divider = 1,
+ .modes = (1 << DPLL_LOW_POWER_BYPASS) | (1 << DPLL_LOCKED),
+ };
+
+ of_ti_dpll_setup(node, &dpll_ck_ops, &dd, 0);
+}
+CLK_OF_DECLARE(ti_am3_dpll_clock, "ti,am3-dpll-clock", of_ti_am3_dpll_setup);
+
+static void __init of_ti_am3_core_dpll_setup(struct device_node *node)
+{
+ const struct dpll_data dd = {
+ .idlest_mask = 0x1,
+ .enable_mask = 0x7,
+ .autoidle_mask = 0x7,
+ .mult_mask = 0x7ff << 8,
+ .div1_mask = 0x7f,
+ .max_multiplier = 2047,
+ .max_divider = 128,
+ .min_divider = 1,
+ .modes = (1 << DPLL_LOW_POWER_BYPASS) | (1 << DPLL_LOCKED),
+ };
+
+ of_ti_dpll_setup(node, &dpll_core_ck_ops, &dd, 0);
+}
+CLK_OF_DECLARE(ti_am3_core_dpll_clock, "ti,am3-dpll-core-clock",
+ of_ti_am3_core_dpll_setup);