--- /dev/null
+/*
+ * Copyright (C) 2014 Broadcom Corporation
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation version 2.
+ *
+ * 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/kernel.h>
+#include <linux/slab.h>
+#include <linux/err.h>
+#include <linux/clk-provider.h>
+#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/clkdev.h>
+#include <linux/of_address.h>
+
+#define IPROC_CLK_MAX_FREQ_POLICY 0x3
+#define IPROC_CLK_POLICY_FREQ_OFFSET 0x008
+#define IPROC_CLK_POLICY_FREQ_POLICY_FREQ_SHIFT 8
+#define IPROC_CLK_POLICY_FREQ_POLICY_FREQ_MASK 0x7
+
+#define IPROC_CLK_PLLARMA_OFFSET 0xc00
+#define IPROC_CLK_PLLARMA_LOCK_SHIFT 28
+#define IPROC_CLK_PLLARMA_PDIV_SHIFT 24
+#define IPROC_CLK_PLLARMA_PDIV_MASK 0xf
+#define IPROC_CLK_PLLARMA_NDIV_INT_SHIFT 8
+#define IPROC_CLK_PLLARMA_NDIV_INT_MASK 0x3ff
+
+#define IPROC_CLK_PLLARMB_OFFSET 0xc04
+#define IPROC_CLK_PLLARMB_NDIV_FRAC_MASK 0xfffff
+
+#define IPROC_CLK_PLLARMC_OFFSET 0xc08
+#define IPROC_CLK_PLLARMC_BYPCLK_EN_SHIFT 8
+#define IPROC_CLK_PLLARMC_MDIV_MASK 0xff
+
+#define IPROC_CLK_PLLARMCTL5_OFFSET 0xc20
+#define IPROC_CLK_PLLARMCTL5_H_MDIV_MASK 0xff
+
+#define IPROC_CLK_PLLARM_OFFSET_OFFSET 0xc24
+#define IPROC_CLK_PLLARM_SW_CTL_SHIFT 29
+#define IPROC_CLK_PLLARM_NDIV_INT_OFFSET_SHIFT 20
+#define IPROC_CLK_PLLARM_NDIV_INT_OFFSET_MASK 0xff
+#define IPROC_CLK_PLLARM_NDIV_FRAC_OFFSET_MASK 0xfffff
+
+#define IPROC_CLK_ARM_DIV_OFFSET 0xe00
+#define IPROC_CLK_ARM_DIV_PLL_SELECT_OVERRIDE_SHIFT 4
+#define IPROC_CLK_ARM_DIV_ARM_PLL_SELECT_MASK 0xf
+
+#define IPROC_CLK_POLICY_DBG_OFFSET 0xec0
+#define IPROC_CLK_POLICY_DBG_ACT_FREQ_SHIFT 12
+#define IPROC_CLK_POLICY_DBG_ACT_FREQ_MASK 0x7
+
+enum iproc_arm_pll_fid {
+ ARM_PLL_FID_CRYSTAL_CLK = 0,
+ ARM_PLL_FID_SYS_CLK = 2,
+ ARM_PLL_FID_CH0_SLOW_CLK = 6,
+ ARM_PLL_FID_CH1_FAST_CLK = 7
+};
+
+struct iproc_arm_pll {
+ struct clk_hw hw;
+ void __iomem *base;
+ unsigned long rate;
+};
+
+#define to_iproc_arm_pll(hw) container_of(hw, struct iproc_arm_pll, hw)
+
+static unsigned int __get_fid(struct iproc_arm_pll *pll)
+{
+ u32 val;
+ unsigned int policy, fid, active_fid;
+
+ val = readl(pll->base + IPROC_CLK_ARM_DIV_OFFSET);
+ if (val & (1 << IPROC_CLK_ARM_DIV_PLL_SELECT_OVERRIDE_SHIFT))
+ policy = val & IPROC_CLK_ARM_DIV_ARM_PLL_SELECT_MASK;
+ else
+ policy = 0;
+
+ /* something is seriously wrong */
+ BUG_ON(policy > IPROC_CLK_MAX_FREQ_POLICY);
+
+ val = readl(pll->base + IPROC_CLK_POLICY_FREQ_OFFSET);
+ fid = (val >> (IPROC_CLK_POLICY_FREQ_POLICY_FREQ_SHIFT * policy)) &
+ IPROC_CLK_POLICY_FREQ_POLICY_FREQ_MASK;
+
+ val = readl(pll->base + IPROC_CLK_POLICY_DBG_OFFSET);
+ active_fid = IPROC_CLK_POLICY_DBG_ACT_FREQ_MASK &
+ (val >> IPROC_CLK_POLICY_DBG_ACT_FREQ_SHIFT);
+ if (fid != active_fid) {
+ pr_debug("%s: fid override %u->%u\n", __func__, fid,
+ active_fid);
+ fid = active_fid;
+ }
+
+ pr_debug("%s: active fid: %u\n", __func__, fid);
+
+ return fid;
+}
+
+/*
+ * Determine the mdiv (post divider) based on the frequency ID being used.
+ * There are 4 sources that can be used to derive the output clock rate:
+ * - 25 MHz Crystal
+ * - System clock
+ * - PLL channel 0 (slow clock)
+ * - PLL channel 1 (fast clock)
+ */
+static int __get_mdiv(struct iproc_arm_pll *pll)
+{
+ unsigned int fid;
+ int mdiv;
+ u32 val;
+
+ fid = __get_fid(pll);
+
+ switch (fid) {
+ case ARM_PLL_FID_CRYSTAL_CLK:
+ case ARM_PLL_FID_SYS_CLK:
+ mdiv = 1;
+ break;
+
+ case ARM_PLL_FID_CH0_SLOW_CLK:
+ val = readl(pll->base + IPROC_CLK_PLLARMC_OFFSET);
+ mdiv = val & IPROC_CLK_PLLARMC_MDIV_MASK;
+ if (mdiv == 0)
+ mdiv = 256;
+ break;
+
+ case ARM_PLL_FID_CH1_FAST_CLK:
+ val = readl(pll->base + IPROC_CLK_PLLARMCTL5_OFFSET);
+ mdiv = val & IPROC_CLK_PLLARMCTL5_H_MDIV_MASK;
+ if (mdiv == 0)
+ mdiv = 256;
+ break;
+
+ default:
+ mdiv = -EFAULT;
+ }
+
+ return mdiv;
+}
+
+static unsigned int __get_ndiv(struct iproc_arm_pll *pll)
+{
+ u32 val;
+ unsigned int ndiv_int, ndiv_frac, ndiv;
+
+ val = readl(pll->base + IPROC_CLK_PLLARM_OFFSET_OFFSET);
+ if (val & (1 << IPROC_CLK_PLLARM_SW_CTL_SHIFT)) {
+ /*
+ * offset mode is active. Read the ndiv from the PLLARM OFFSET
+ * register
+ */
+ ndiv_int = (val >> IPROC_CLK_PLLARM_NDIV_INT_OFFSET_SHIFT) &
+ IPROC_CLK_PLLARM_NDIV_INT_OFFSET_MASK;
+ if (ndiv_int == 0)
+ ndiv_int = 256;
+
+ ndiv_frac = val & IPROC_CLK_PLLARM_NDIV_FRAC_OFFSET_MASK;
+ } else {
+ /* offset mode not active */
+ val = readl(pll->base + IPROC_CLK_PLLARMA_OFFSET);
+ ndiv_int = (val >> IPROC_CLK_PLLARMA_NDIV_INT_SHIFT) &
+ IPROC_CLK_PLLARMA_NDIV_INT_MASK;
+ if (ndiv_int == 0)
+ ndiv_int = 1024;
+
+ val = readl(pll->base + IPROC_CLK_PLLARMB_OFFSET);
+ ndiv_frac = val & IPROC_CLK_PLLARMB_NDIV_FRAC_MASK;
+ }
+
+ ndiv = (ndiv_int << 20) | ndiv_frac;
+
+ return ndiv;
+}
+
+/*
+ * The output frequency of the ARM PLL is calculated based on the ARM PLL
+ * divider values:
+ * pdiv = ARM PLL pre-divider
+ * ndiv = ARM PLL multiplier
+ * mdiv = ARM PLL post divider
+ *
+ * The frequency is calculated by:
+ * ((ndiv * parent clock rate) / pdiv) / mdiv
+ */
+static unsigned long iproc_arm_pll_recalc_rate(struct clk_hw *hw,
+ unsigned long parent_rate)
+{
+ struct iproc_arm_pll *pll = to_iproc_arm_pll(hw);
+ u32 val;
+ int mdiv;
+ u64 ndiv;
+ unsigned int pdiv;
+
+ /* in bypass mode, use parent rate */
+ val = readl(pll->base + IPROC_CLK_PLLARMC_OFFSET);
+ if (val & (1 << IPROC_CLK_PLLARMC_BYPCLK_EN_SHIFT)) {
+ pll->rate = parent_rate;
+ return pll->rate;
+ }
+
+ /* PLL needs to be locked */
+ val = readl(pll->base + IPROC_CLK_PLLARMA_OFFSET);
+ if (!(val & (1 << IPROC_CLK_PLLARMA_LOCK_SHIFT))) {
+ pll->rate = 0;
+ return 0;
+ }
+
+ pdiv = (val >> IPROC_CLK_PLLARMA_PDIV_SHIFT) &
+ IPROC_CLK_PLLARMA_PDIV_MASK;
+ if (pdiv == 0)
+ pdiv = 16;
+
+ ndiv = __get_ndiv(pll);
+ mdiv = __get_mdiv(pll);
+ if (mdiv <= 0) {
+ pll->rate = 0;
+ return 0;
+ }
+ pll->rate = (ndiv * parent_rate) >> 20;
+ pll->rate = (pll->rate / pdiv) / mdiv;
+
+ pr_debug("%s: ARM PLL rate: %lu. parent rate: %lu\n", __func__,
+ pll->rate, parent_rate);
+ pr_debug("%s: ndiv_int: %u, pdiv: %u, mdiv: %d\n", __func__,
+ (unsigned int)(ndiv >> 20), pdiv, mdiv);
+
+ return pll->rate;
+}
+
+static const struct clk_ops iproc_arm_pll_ops = {
+ .recalc_rate = iproc_arm_pll_recalc_rate,
+};
+
+void __init iproc_armpll_setup(struct device_node *node)
+{
+ int ret;
+ struct clk *clk;
+ struct iproc_arm_pll *pll;
+ struct clk_init_data init;
+ const char *parent_name;
+
+ pll = kzalloc(sizeof(*pll), GFP_KERNEL);
+ if (WARN_ON(!pll))
+ return;
+
+ pll->base = of_iomap(node, 0);
+ if (WARN_ON(!pll->base))
+ goto err_free_pll;
+
+ init.name = node->name;
+ init.ops = &iproc_arm_pll_ops;
+ init.flags = 0;
+ parent_name = of_clk_get_parent_name(node, 0);
+ init.parent_names = (parent_name ? &parent_name : NULL);
+ init.num_parents = (parent_name ? 1 : 0);
+ pll->hw.init = &init;
+
+ clk = clk_register(NULL, &pll->hw);
+ if (WARN_ON(IS_ERR(clk)))
+ goto err_iounmap;
+
+ ret = of_clk_add_provider(node, of_clk_src_simple_get, clk);
+ if (WARN_ON(ret))
+ goto err_clk_unregister;
+
+ return;
+
+err_clk_unregister:
+ clk_unregister(clk);
+err_iounmap:
+ iounmap(pll->base);
+err_free_pll:
+ kfree(pll);
+}
--- /dev/null
+/*
+ * Copyright (C) 2014 Broadcom Corporation
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation version 2.
+ *
+ * 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/kernel.h>
+#include <linux/err.h>
+#include <linux/clk-provider.h>
+#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/clkdev.h>
+#include <linux/of_address.h>
+#include <linux/delay.h>
+
+#include "clk-iproc.h"
+
+struct iproc_asiu;
+
+struct iproc_asiu_clk {
+ struct clk_hw hw;
+ const char *name;
+ struct iproc_asiu *asiu;
+ unsigned long rate;
+ struct iproc_asiu_div div;
+ struct iproc_asiu_gate gate;
+};
+
+struct iproc_asiu {
+ void __iomem *div_base;
+ void __iomem *gate_base;
+
+ struct clk_onecell_data clk_data;
+ struct iproc_asiu_clk *clks;
+};
+
+#define to_asiu_clk(hw) container_of(hw, struct iproc_asiu_clk, hw)
+
+static int iproc_asiu_clk_enable(struct clk_hw *hw)
+{
+ struct iproc_asiu_clk *clk = to_asiu_clk(hw);
+ struct iproc_asiu *asiu = clk->asiu;
+ u32 val;
+
+ /* some clocks at the ASIU level are always enabled */
+ if (clk->gate.offset == IPROC_CLK_INVALID_OFFSET)
+ return 0;
+
+ val = readl(asiu->gate_base + clk->gate.offset);
+ val |= (1 << clk->gate.en_shift);
+ writel(val, asiu->gate_base + clk->gate.offset);
+
+ return 0;
+}
+
+static void iproc_asiu_clk_disable(struct clk_hw *hw)
+{
+ struct iproc_asiu_clk *clk = to_asiu_clk(hw);
+ struct iproc_asiu *asiu = clk->asiu;
+ u32 val;
+
+ /* some clocks at the ASIU level are always enabled */
+ if (clk->gate.offset == IPROC_CLK_INVALID_OFFSET)
+ return;
+
+ val = readl(asiu->gate_base + clk->gate.offset);
+ val &= ~(1 << clk->gate.en_shift);
+ writel(val, asiu->gate_base + clk->gate.offset);
+}
+
+static unsigned long iproc_asiu_clk_recalc_rate(struct clk_hw *hw,
+ unsigned long parent_rate)
+{
+ struct iproc_asiu_clk *clk = to_asiu_clk(hw);
+ struct iproc_asiu *asiu = clk->asiu;
+ u32 val;
+ unsigned int div_h, div_l;
+
+ if (parent_rate == 0) {
+ clk->rate = 0;
+ return 0;
+ }
+
+ /* if clock divisor is not enabled, simply return parent rate */
+ val = readl(asiu->div_base + clk->div.offset);
+ if ((val & (1 << clk->div.en_shift)) == 0) {
+ clk->rate = parent_rate;
+ return parent_rate;
+ }
+
+ /* clock rate = parent rate / (high_div + 1) + (low_div + 1) */
+ div_h = (val >> clk->div.high_shift) & bit_mask(clk->div.high_width);
+ div_h++;
+ div_l = (val >> clk->div.low_shift) & bit_mask(clk->div.low_width);
+ div_l++;
+
+ clk->rate = parent_rate / (div_h + div_l);
+ pr_debug("%s: rate: %lu. parent rate: %lu div_h: %u div_l: %u\n",
+ __func__, clk->rate, parent_rate, div_h, div_l);
+
+ return clk->rate;
+}
+
+static long iproc_asiu_clk_round_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long *parent_rate)
+{
+ unsigned int div;
+
+ if (rate == 0 || *parent_rate == 0)
+ return -EINVAL;
+
+ if (rate == *parent_rate)
+ return *parent_rate;
+
+ div = DIV_ROUND_UP(*parent_rate, rate);
+ if (div < 2)
+ return *parent_rate;
+
+ return *parent_rate / div;
+}
+
+static int iproc_asiu_clk_set_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long parent_rate)
+{
+ struct iproc_asiu_clk *clk = to_asiu_clk(hw);
+ struct iproc_asiu *asiu = clk->asiu;
+ unsigned int div, div_h, div_l;
+ u32 val;
+
+ if (rate == 0 || parent_rate == 0)
+ return -EINVAL;
+
+ /* simply disable the divisor if one wants the same rate as parent */
+ if (rate == parent_rate) {
+ val = readl(asiu->div_base + clk->div.offset);
+ val &= ~(1 << clk->div.en_shift);
+ writel(val, asiu->div_base + clk->div.offset);
+ return 0;
+ }
+
+ div = DIV_ROUND_UP(parent_rate, rate);
+ if (div < 2)
+ return -EINVAL;
+
+ div_h = div_l = div >> 1;
+ div_h--;
+ div_l--;
+
+ val = readl(asiu->div_base + clk->div.offset);
+ val |= 1 << clk->div.en_shift;
+ if (div_h) {
+ val &= ~(bit_mask(clk->div.high_width)
+ << clk->div.high_shift);
+ val |= div_h << clk->div.high_shift;
+ } else {
+ val &= ~(bit_mask(clk->div.high_width)
+ << clk->div.high_shift);
+ }
+ if (div_l) {
+ val &= ~(bit_mask(clk->div.low_width) << clk->div.low_shift);
+ val |= div_l << clk->div.low_shift;
+ } else {
+ val &= ~(bit_mask(clk->div.low_width) << clk->div.low_shift);
+ }
+ writel(val, asiu->div_base + clk->div.offset);
+
+ return 0;
+}
+
+static const struct clk_ops iproc_asiu_ops = {
+ .enable = iproc_asiu_clk_enable,
+ .disable = iproc_asiu_clk_disable,
+ .recalc_rate = iproc_asiu_clk_recalc_rate,
+ .round_rate = iproc_asiu_clk_round_rate,
+ .set_rate = iproc_asiu_clk_set_rate,
+};
+
+void __init iproc_asiu_setup(struct device_node *node,
+ const struct iproc_asiu_div *div,
+ const struct iproc_asiu_gate *gate,
+ unsigned int num_clks)
+{
+ int i, ret;
+ struct iproc_asiu *asiu;
+
+ if (WARN_ON(!gate || !div))
+ return;
+
+ asiu = kzalloc(sizeof(*asiu), GFP_KERNEL);
+ if (WARN_ON(!asiu))
+ return;
+
+ asiu->clk_data.clk_num = num_clks;
+ asiu->clk_data.clks = kcalloc(num_clks, sizeof(*asiu->clk_data.clks),
+ GFP_KERNEL);
+ if (WARN_ON(!asiu->clk_data.clks))
+ goto err_clks;
+
+ asiu->clks = kcalloc(num_clks, sizeof(*asiu->clks), GFP_KERNEL);
+ if (WARN_ON(!asiu->clks))
+ goto err_asiu_clks;
+
+ asiu->div_base = of_iomap(node, 0);
+ if (WARN_ON(!asiu->div_base))
+ goto err_iomap_div;
+
+ asiu->gate_base = of_iomap(node, 1);
+ if (WARN_ON(!asiu->gate_base))
+ goto err_iomap_gate;
+
+ for (i = 0; i < num_clks; i++) {
+ struct clk_init_data init;
+ struct clk *clk;
+ const char *parent_name;
+ struct iproc_asiu_clk *asiu_clk;
+ const char *clk_name;
+
+ clk_name = kzalloc(IPROC_CLK_NAME_LEN, GFP_KERNEL);
+ if (WARN_ON(!clk_name))
+ goto err_clk_register;
+
+ ret = of_property_read_string_index(node, "clock-output-names",
+ i, &clk_name);
+ if (WARN_ON(ret))
+ goto err_clk_register;
+
+ asiu_clk = &asiu->clks[i];
+ asiu_clk->name = clk_name;
+ asiu_clk->asiu = asiu;
+ asiu_clk->div = div[i];
+ asiu_clk->gate = gate[i];
+ init.name = clk_name;
+ init.ops = &iproc_asiu_ops;
+ init.flags = 0;
+ parent_name = of_clk_get_parent_name(node, 0);
+ init.parent_names = (parent_name ? &parent_name : NULL);
+ init.num_parents = (parent_name ? 1 : 0);
+ asiu_clk->hw.init = &init;
+
+ clk = clk_register(NULL, &asiu_clk->hw);
+ if (WARN_ON(IS_ERR(clk)))
+ goto err_clk_register;
+ asiu->clk_data.clks[i] = clk;
+ }
+
+ ret = of_clk_add_provider(node, of_clk_src_onecell_get,
+ &asiu->clk_data);
+ if (WARN_ON(ret))
+ goto err_clk_register;
+
+ return;
+
+err_clk_register:
+ for (i = 0; i < num_clks; i++)
+ kfree(asiu->clks[i].name);
+ iounmap(asiu->gate_base);
+
+err_iomap_gate:
+ iounmap(asiu->div_base);
+
+err_iomap_div:
+ kfree(asiu->clks);
+
+err_asiu_clks:
+ kfree(asiu->clk_data.clks);
+
+err_clks:
+ kfree(asiu);
+}
--- /dev/null
+/*
+ * Copyright (C) 2014 Broadcom Corporation
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation version 2.
+ *
+ * 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/kernel.h>
+#include <linux/err.h>
+#include <linux/clk-provider.h>
+#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/clkdev.h>
+#include <linux/of_address.h>
+#include <linux/delay.h>
+
+#include "clk-iproc.h"
+
+#define PLL_VCO_HIGH_SHIFT 19
+#define PLL_VCO_LOW_SHIFT 30
+
+/* number of delay loops waiting for PLL to lock */
+#define LOCK_DELAY 100
+
+/* number of VCO frequency bands */
+#define NUM_FREQ_BANDS 8
+
+#define NUM_KP_BANDS 3
+enum kp_band {
+ KP_BAND_MID = 0,
+ KP_BAND_HIGH,
+ KP_BAND_HIGH_HIGH
+};
+
+static const unsigned int kp_table[NUM_KP_BANDS][NUM_FREQ_BANDS] = {
+ { 5, 6, 6, 7, 7, 8, 9, 10 },
+ { 4, 4, 5, 5, 6, 7, 8, 9 },
+ { 4, 5, 5, 6, 7, 8, 9, 10 },
+};
+
+static const unsigned long ref_freq_table[NUM_FREQ_BANDS][2] = {
+ { 10000000, 12500000 },
+ { 12500000, 15000000 },
+ { 15000000, 20000000 },
+ { 20000000, 25000000 },
+ { 25000000, 50000000 },
+ { 50000000, 75000000 },
+ { 75000000, 100000000 },
+ { 100000000, 125000000 },
+};
+
+enum vco_freq_range {
+ VCO_LOW = 700000000U,
+ VCO_MID = 1200000000U,
+ VCO_HIGH = 2200000000U,
+ VCO_HIGH_HIGH = 3100000000U,
+ VCO_MAX = 4000000000U,
+};
+
+struct iproc_pll;
+
+struct iproc_clk {
+ struct clk_hw hw;
+ const char *name;
+ struct iproc_pll *pll;
+ unsigned long rate;
+ const struct iproc_clk_ctrl *ctrl;
+};
+
+struct iproc_pll {
+ void __iomem *pll_base;
+ void __iomem *pwr_base;
+ void __iomem *asiu_base;
+
+ const struct iproc_pll_ctrl *ctrl;
+ const struct iproc_pll_vco_param *vco_param;
+ unsigned int num_vco_entries;
+
+ struct clk_onecell_data clk_data;
+ struct iproc_clk *clks;
+};
+
+#define to_iproc_clk(hw) container_of(hw, struct iproc_clk, hw)
+
+/*
+ * Based on the target frequency, find a match from the VCO frequency parameter
+ * table and return its index
+ */
+static int pll_get_rate_index(struct iproc_pll *pll, unsigned int target_rate)
+{
+ int i;
+
+ for (i = 0; i < pll->num_vco_entries; i++)
+ if (target_rate == pll->vco_param[i].rate)
+ break;
+
+ if (i >= pll->num_vco_entries)
+ return -EINVAL;
+
+ return i;
+}
+
+static int get_kp(unsigned long ref_freq, enum kp_band kp_index)
+{
+ int i;
+
+ if (ref_freq < ref_freq_table[0][0])
+ return -EINVAL;
+
+ for (i = 0; i < NUM_FREQ_BANDS; i++) {
+ if (ref_freq >= ref_freq_table[i][0] &&
+ ref_freq < ref_freq_table[i][1])
+ return kp_table[kp_index][i];
+ }
+ return -EINVAL;
+}
+
+static int pll_wait_for_lock(struct iproc_pll *pll)
+{
+ int i;
+ const struct iproc_pll_ctrl *ctrl = pll->ctrl;
+
+ for (i = 0; i < LOCK_DELAY; i++) {
+ u32 val = readl(pll->pll_base + ctrl->status.offset);
+
+ if (val & (1 << ctrl->status.shift))
+ return 0;
+ udelay(10);
+ }
+
+ return -EIO;
+}
+
+static void __pll_disable(struct iproc_pll *pll)
+{
+ const struct iproc_pll_ctrl *ctrl = pll->ctrl;
+ u32 val;
+
+ if (ctrl->flags & IPROC_CLK_PLL_ASIU) {
+ val = readl(pll->asiu_base + ctrl->asiu.offset);
+ val &= ~(1 << ctrl->asiu.en_shift);
+ writel(val, pll->asiu_base + ctrl->asiu.offset);
+ }
+
+ /* latch input value so core power can be shut down */
+ val = readl(pll->pwr_base + ctrl->aon.offset);
+ val |= (1 << ctrl->aon.iso_shift);
+ writel(val, pll->pwr_base + ctrl->aon.offset);
+
+ /* power down the core */
+ val &= ~(bit_mask(ctrl->aon.pwr_width) << ctrl->aon.pwr_shift);
+ writel(val, pll->pwr_base + ctrl->aon.offset);
+}
+
+static int __pll_enable(struct iproc_pll *pll)
+{
+ const struct iproc_pll_ctrl *ctrl = pll->ctrl;
+ u32 val;
+
+ /* power up the PLL and make sure it's not latched */
+ val = readl(pll->pwr_base + ctrl->aon.offset);
+ val |= bit_mask(ctrl->aon.pwr_width) << ctrl->aon.pwr_shift;
+ val &= ~(1 << ctrl->aon.iso_shift);
+ writel(val, pll->pwr_base + ctrl->aon.offset);
+
+ /* certain PLLs also need to be ungated from the ASIU top level */
+ if (ctrl->flags & IPROC_CLK_PLL_ASIU) {
+ val = readl(pll->asiu_base + ctrl->asiu.offset);
+ val |= (1 << ctrl->asiu.en_shift);
+ writel(val, pll->asiu_base + ctrl->asiu.offset);
+ }
+
+ return 0;
+}
+
+static void __pll_put_in_reset(struct iproc_pll *pll)
+{
+ u32 val;
+ const struct iproc_pll_ctrl *ctrl = pll->ctrl;
+ const struct iproc_pll_reset_ctrl *reset = &ctrl->reset;
+
+ val = readl(pll->pll_base + reset->offset);
+ val &= ~(1 << reset->reset_shift | 1 << reset->p_reset_shift);
+ writel(val, pll->pll_base + reset->offset);
+ if (unlikely(ctrl->flags & IPROC_CLK_NEEDS_READ_BACK))
+ readl(pll->pll_base + reset->offset);
+}
+
+static void __pll_bring_out_reset(struct iproc_pll *pll, unsigned int kp,
+ unsigned int ka, unsigned int ki)
+{
+ u32 val;
+ const struct iproc_pll_ctrl *ctrl = pll->ctrl;
+ const struct iproc_pll_reset_ctrl *reset = &ctrl->reset;
+
+ val = readl(pll->pll_base + reset->offset);
+ val &= ~(bit_mask(reset->ki_width) << reset->ki_shift |
+ bit_mask(reset->kp_width) << reset->kp_shift |
+ bit_mask(reset->ka_width) << reset->ka_shift);
+ val |= ki << reset->ki_shift | kp << reset->kp_shift |
+ ka << reset->ka_shift;
+ val |= 1 << reset->reset_shift | 1 << reset->p_reset_shift;
+ writel(val, pll->pll_base + reset->offset);
+ if (unlikely(ctrl->flags & IPROC_CLK_NEEDS_READ_BACK))
+ readl(pll->pll_base + reset->offset);
+}
+
+static int pll_set_rate(struct iproc_clk *clk, unsigned int rate_index,
+ unsigned long parent_rate)
+{
+ struct iproc_pll *pll = clk->pll;
+ const struct iproc_pll_vco_param *vco = &pll->vco_param[rate_index];
+ const struct iproc_pll_ctrl *ctrl = pll->ctrl;
+ int ka = 0, ki, kp, ret;
+ unsigned long rate = vco->rate;
+ u32 val;
+ enum kp_band kp_index;
+ unsigned long ref_freq;
+
+ /*
+ * reference frequency = parent frequency / PDIV
+ * If PDIV = 0, then it becomes a multiplier (x2)
+ */
+ if (vco->pdiv == 0)
+ ref_freq = parent_rate * 2;
+ else
+ ref_freq = parent_rate / vco->pdiv;
+
+ /* determine Ki and Kp index based on target VCO frequency */
+ if (rate >= VCO_LOW && rate < VCO_HIGH) {
+ ki = 4;
+ kp_index = KP_BAND_MID;
+ } else if (rate >= VCO_HIGH && rate && rate < VCO_HIGH_HIGH) {
+ ki = 3;
+ kp_index = KP_BAND_HIGH;
+ } else if (rate >= VCO_HIGH_HIGH && rate < VCO_MAX) {
+ ki = 3;
+ kp_index = KP_BAND_HIGH_HIGH;
+ } else {
+ pr_err("%s: pll: %s has invalid rate: %lu\n", __func__,
+ clk->name, rate);
+ return -EINVAL;
+ }
+
+ kp = get_kp(ref_freq, kp_index);
+ if (kp < 0) {
+ pr_err("%s: pll: %s has invalid kp\n", __func__, clk->name);
+ return kp;
+ }
+
+ ret = __pll_enable(pll);
+ if (ret) {
+ pr_err("%s: pll: %s fails to enable\n", __func__, clk->name);
+ return ret;
+ }
+
+ /* put PLL in reset */
+ __pll_put_in_reset(pll);
+
+ writel(0, pll->pll_base + ctrl->vco_ctrl.u_offset);
+ if (unlikely(ctrl->flags & IPROC_CLK_NEEDS_READ_BACK))
+ readl(pll->pll_base + ctrl->vco_ctrl.u_offset);
+ val = readl(pll->pll_base + ctrl->vco_ctrl.l_offset);
+
+ if (rate >= VCO_LOW && rate < VCO_MID)
+ val |= (1 << PLL_VCO_LOW_SHIFT);
+
+ if (rate < VCO_HIGH)
+ val &= ~(1 << PLL_VCO_HIGH_SHIFT);
+ else
+ val |= (1 << PLL_VCO_HIGH_SHIFT);
+
+ writel(val, pll->pll_base + ctrl->vco_ctrl.l_offset);
+ if (unlikely(ctrl->flags & IPROC_CLK_NEEDS_READ_BACK))
+ readl(pll->pll_base + ctrl->vco_ctrl.l_offset);
+
+ /* program integer part of NDIV */
+ val = readl(pll->pll_base + ctrl->ndiv_int.offset);
+ val &= ~(bit_mask(ctrl->ndiv_int.width) << ctrl->ndiv_int.shift);
+ val |= vco->ndiv_int << ctrl->ndiv_int.shift;
+ writel(val, pll->pll_base + ctrl->ndiv_int.offset);
+ if (unlikely(ctrl->flags & IPROC_CLK_NEEDS_READ_BACK))
+ readl(pll->pll_base + ctrl->ndiv_int.offset);
+
+ /* program fractional part of NDIV */
+ if (ctrl->flags & IPROC_CLK_PLL_HAS_NDIV_FRAC) {
+ val = readl(pll->pll_base + ctrl->ndiv_frac.offset);
+ val &= ~(bit_mask(ctrl->ndiv_frac.width) <<
+ ctrl->ndiv_frac.shift);
+ val |= vco->ndiv_frac << ctrl->ndiv_frac.shift;
+ writel(val, pll->pll_base + ctrl->ndiv_frac.offset);
+ if (unlikely(ctrl->flags & IPROC_CLK_NEEDS_READ_BACK))
+ readl(pll->pll_base + ctrl->ndiv_frac.offset);
+ }
+
+ /* program PDIV */
+ val = readl(pll->pll_base + ctrl->pdiv.offset);
+ val &= ~(bit_mask(ctrl->pdiv.width) << ctrl->pdiv.shift);
+ val |= vco->pdiv << ctrl->pdiv.shift;
+ writel(val, pll->pll_base + ctrl->pdiv.offset);
+ if (unlikely(ctrl->flags & IPROC_CLK_NEEDS_READ_BACK))
+ readl(pll->pll_base + ctrl->pdiv.offset);
+
+ __pll_bring_out_reset(pll, kp, ka, ki);
+
+ ret = pll_wait_for_lock(pll);
+ if (ret < 0) {
+ pr_err("%s: pll: %s failed to lock\n", __func__, clk->name);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int iproc_pll_enable(struct clk_hw *hw)
+{
+ struct iproc_clk *clk = to_iproc_clk(hw);
+ struct iproc_pll *pll = clk->pll;
+
+ return __pll_enable(pll);
+}
+
+static void iproc_pll_disable(struct clk_hw *hw)
+{
+ struct iproc_clk *clk = to_iproc_clk(hw);
+ struct iproc_pll *pll = clk->pll;
+ const struct iproc_pll_ctrl *ctrl = pll->ctrl;
+
+ if (ctrl->flags & IPROC_CLK_AON)
+ return;
+
+ __pll_disable(pll);
+}
+
+static unsigned long iproc_pll_recalc_rate(struct clk_hw *hw,
+ unsigned long parent_rate)
+{
+ struct iproc_clk *clk = to_iproc_clk(hw);
+ struct iproc_pll *pll = clk->pll;
+ const struct iproc_pll_ctrl *ctrl = pll->ctrl;
+ u32 val;
+ u64 ndiv;
+ unsigned int ndiv_int, ndiv_frac, pdiv;
+
+ if (parent_rate == 0)
+ return 0;
+
+ /* PLL needs to be locked */
+ val = readl(pll->pll_base + ctrl->status.offset);
+ if ((val & (1 << ctrl->status.shift)) == 0) {
+ clk->rate = 0;
+ return 0;
+ }
+
+ /*
+ * PLL output frequency =
+ *
+ * ((ndiv_int + ndiv_frac / 2^20) * (parent clock rate / pdiv)
+ */
+ val = readl(pll->pll_base + ctrl->ndiv_int.offset);
+ ndiv_int = (val >> ctrl->ndiv_int.shift) &
+ bit_mask(ctrl->ndiv_int.width);
+ ndiv = ndiv_int << ctrl->ndiv_int.shift;
+
+ if (ctrl->flags & IPROC_CLK_PLL_HAS_NDIV_FRAC) {
+ val = readl(pll->pll_base + ctrl->ndiv_frac.offset);
+ ndiv_frac = (val >> ctrl->ndiv_frac.shift) &
+ bit_mask(ctrl->ndiv_frac.width);
+
+ if (ndiv_frac != 0)
+ ndiv = (ndiv_int << ctrl->ndiv_int.shift) | ndiv_frac;
+ }
+
+ val = readl(pll->pll_base + ctrl->pdiv.offset);
+ pdiv = (val >> ctrl->pdiv.shift) & bit_mask(ctrl->pdiv.width);
+
+ clk->rate = (ndiv * parent_rate) >> ctrl->ndiv_int.shift;
+
+ if (pdiv == 0)
+ clk->rate *= 2;
+ else
+ clk->rate /= pdiv;
+
+ return clk->rate;
+}
+
+static long iproc_pll_round_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long *parent_rate)
+{
+ unsigned i;
+ struct iproc_clk *clk = to_iproc_clk(hw);
+ struct iproc_pll *pll = clk->pll;
+
+ if (rate == 0 || *parent_rate == 0 || !pll->vco_param)
+ return -EINVAL;
+
+ for (i = 0; i < pll->num_vco_entries; i++) {
+ if (rate <= pll->vco_param[i].rate)
+ break;
+ }
+
+ if (i == pll->num_vco_entries)
+ i--;
+
+ return pll->vco_param[i].rate;
+}
+
+static int iproc_pll_set_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long parent_rate)
+{
+ struct iproc_clk *clk = to_iproc_clk(hw);
+ struct iproc_pll *pll = clk->pll;
+ int rate_index, ret;
+
+ rate_index = pll_get_rate_index(pll, rate);
+ if (rate_index < 0)
+ return rate_index;
+
+ ret = pll_set_rate(clk, rate_index, parent_rate);
+ return ret;
+}
+
+static const struct clk_ops iproc_pll_ops = {
+ .enable = iproc_pll_enable,
+ .disable = iproc_pll_disable,
+ .recalc_rate = iproc_pll_recalc_rate,
+ .round_rate = iproc_pll_round_rate,
+ .set_rate = iproc_pll_set_rate,
+};
+
+static int iproc_clk_enable(struct clk_hw *hw)
+{
+ struct iproc_clk *clk = to_iproc_clk(hw);
+ const struct iproc_clk_ctrl *ctrl = clk->ctrl;
+ struct iproc_pll *pll = clk->pll;
+ u32 val;
+
+ /* channel enable is active low */
+ val = readl(pll->pll_base + ctrl->enable.offset);
+ val &= ~(1 << ctrl->enable.enable_shift);
+ writel(val, pll->pll_base + ctrl->enable.offset);
+
+ /* also make sure channel is not held */
+ val = readl(pll->pll_base + ctrl->enable.offset);
+ val &= ~(1 << ctrl->enable.hold_shift);
+ writel(val, pll->pll_base + ctrl->enable.offset);
+ if (unlikely(ctrl->flags & IPROC_CLK_NEEDS_READ_BACK))
+ readl(pll->pll_base + ctrl->enable.offset);
+
+ return 0;
+}
+
+static void iproc_clk_disable(struct clk_hw *hw)
+{
+ struct iproc_clk *clk = to_iproc_clk(hw);
+ const struct iproc_clk_ctrl *ctrl = clk->ctrl;
+ struct iproc_pll *pll = clk->pll;
+ u32 val;
+
+ if (ctrl->flags & IPROC_CLK_AON)
+ return;
+
+ val = readl(pll->pll_base + ctrl->enable.offset);
+ val |= 1 << ctrl->enable.enable_shift;
+ writel(val, pll->pll_base + ctrl->enable.offset);
+ if (unlikely(ctrl->flags & IPROC_CLK_NEEDS_READ_BACK))
+ readl(pll->pll_base + ctrl->enable.offset);
+}
+
+static unsigned long iproc_clk_recalc_rate(struct clk_hw *hw,
+ unsigned long parent_rate)
+{
+ struct iproc_clk *clk = to_iproc_clk(hw);
+ const struct iproc_clk_ctrl *ctrl = clk->ctrl;
+ struct iproc_pll *pll = clk->pll;
+ u32 val;
+ unsigned int mdiv;
+
+ if (parent_rate == 0)
+ return 0;
+
+ val = readl(pll->pll_base + ctrl->mdiv.offset);
+ mdiv = (val >> ctrl->mdiv.shift) & bit_mask(ctrl->mdiv.width);
+ if (mdiv == 0)
+ mdiv = 256;
+
+ clk->rate = parent_rate / mdiv;
+
+ return clk->rate;
+}
+
+static long iproc_clk_round_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long *parent_rate)
+{
+ unsigned int div;
+
+ if (rate == 0 || *parent_rate == 0)
+ return -EINVAL;
+
+ if (rate == *parent_rate)
+ return *parent_rate;
+
+ div = DIV_ROUND_UP(*parent_rate, rate);
+ if (div < 2)
+ return *parent_rate;
+
+ if (div > 256)
+ div = 256;
+
+ return *parent_rate / div;
+}
+
+static int iproc_clk_set_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long parent_rate)
+{
+ struct iproc_clk *clk = to_iproc_clk(hw);
+ const struct iproc_clk_ctrl *ctrl = clk->ctrl;
+ struct iproc_pll *pll = clk->pll;
+ u32 val;
+ unsigned int div;
+
+ if (rate == 0 || parent_rate == 0)
+ return -EINVAL;
+
+ div = DIV_ROUND_UP(parent_rate, rate);
+ if (div > 256)
+ return -EINVAL;
+
+ val = readl(pll->pll_base + ctrl->mdiv.offset);
+ if (div == 256) {
+ val &= ~(bit_mask(ctrl->mdiv.width) << ctrl->mdiv.shift);
+ } else {
+ val &= ~(bit_mask(ctrl->mdiv.width) << ctrl->mdiv.shift);
+ val |= div << ctrl->mdiv.shift;
+ }
+ writel(val, pll->pll_base + ctrl->mdiv.offset);
+ if (unlikely(ctrl->flags & IPROC_CLK_NEEDS_READ_BACK))
+ readl(pll->pll_base + ctrl->mdiv.offset);
+ clk->rate = parent_rate / div;
+
+ return 0;
+}
+
+static const struct clk_ops iproc_clk_ops = {
+ .enable = iproc_clk_enable,
+ .disable = iproc_clk_disable,
+ .recalc_rate = iproc_clk_recalc_rate,
+ .round_rate = iproc_clk_round_rate,
+ .set_rate = iproc_clk_set_rate,
+};
+
+/**
+ * Some PLLs require the PLL SW override bit to be set before changes can be
+ * applied to the PLL
+ */
+static void iproc_pll_sw_cfg(struct iproc_pll *pll)
+{
+ const struct iproc_pll_ctrl *ctrl = pll->ctrl;
+
+ if (ctrl->flags & IPROC_CLK_PLL_NEEDS_SW_CFG) {
+ u32 val;
+
+ val = readl(pll->pll_base + ctrl->sw_ctrl.offset);
+ val |= BIT(ctrl->sw_ctrl.shift);
+ writel(val, pll->pll_base + ctrl->sw_ctrl.offset);
+ if (unlikely(ctrl->flags & IPROC_CLK_NEEDS_READ_BACK))
+ readl(pll->pll_base + ctrl->sw_ctrl.offset);
+ }
+}
+
+void __init iproc_pll_clk_setup(struct device_node *node,
+ const struct iproc_pll_ctrl *pll_ctrl,
+ const struct iproc_pll_vco_param *vco,
+ unsigned int num_vco_entries,
+ const struct iproc_clk_ctrl *clk_ctrl,
+ unsigned int num_clks)
+{
+ int i, ret;
+ struct clk *clk;
+ struct iproc_pll *pll;
+ struct iproc_clk *iclk;
+ struct clk_init_data init;
+ const char *parent_name;
+
+ if (WARN_ON(!pll_ctrl) || WARN_ON(!clk_ctrl))
+ return;
+
+ pll = kzalloc(sizeof(*pll), GFP_KERNEL);
+ if (WARN_ON(!pll))
+ return;
+
+ pll->clk_data.clk_num = num_clks;
+ pll->clk_data.clks = kcalloc(num_clks, sizeof(*pll->clk_data.clks),
+ GFP_KERNEL);
+ if (WARN_ON(!pll->clk_data.clks))
+ goto err_clk_data;
+
+ pll->clks = kcalloc(num_clks, sizeof(*pll->clks), GFP_KERNEL);
+ if (WARN_ON(!pll->clks))
+ goto err_clks;
+
+ pll->pll_base = of_iomap(node, 0);
+ if (WARN_ON(!pll->pll_base))
+ goto err_pll_iomap;
+
+ pll->pwr_base = of_iomap(node, 1);
+ if (WARN_ON(!pll->pwr_base))
+ goto err_pwr_iomap;
+
+ /* some PLLs require gating control at the top ASIU level */
+ if (pll_ctrl->flags & IPROC_CLK_PLL_ASIU) {
+ pll->asiu_base = of_iomap(node, 2);
+ if (WARN_ON(!pll->asiu_base))
+ goto err_asiu_iomap;
+ }
+
+ /* initialize and register the PLL itself */
+ pll->ctrl = pll_ctrl;
+
+ iclk = &pll->clks[0];
+ iclk->pll = pll;
+ iclk->name = node->name;
+
+ init.name = node->name;
+ init.ops = &iproc_pll_ops;
+ init.flags = 0;
+ parent_name = of_clk_get_parent_name(node, 0);
+ init.parent_names = (parent_name ? &parent_name : NULL);
+ init.num_parents = (parent_name ? 1 : 0);
+ iclk->hw.init = &init;
+
+ if (vco) {
+ pll->num_vco_entries = num_vco_entries;
+ pll->vco_param = vco;
+ }
+
+ iproc_pll_sw_cfg(pll);
+
+ clk = clk_register(NULL, &iclk->hw);
+ if (WARN_ON(IS_ERR(clk)))
+ goto err_pll_register;
+
+ pll->clk_data.clks[0] = clk;
+
+ /* now initialize and register all leaf clocks */
+ for (i = 1; i < num_clks; i++) {
+ const char *clk_name;
+
+ memset(&init, 0, sizeof(init));
+ parent_name = node->name;
+
+ clk_name = kzalloc(IPROC_CLK_NAME_LEN, GFP_KERNEL);
+ if (WARN_ON(!clk_name))
+ goto err_clk_register;
+
+ ret = of_property_read_string_index(node, "clock-output-names",
+ i, &clk_name);
+ if (WARN_ON(ret))
+ goto err_clk_register;
+
+ iclk = &pll->clks[i];
+ iclk->name = clk_name;
+ iclk->pll = pll;
+ iclk->ctrl = &clk_ctrl[i];
+
+ init.name = clk_name;
+ init.ops = &iproc_clk_ops;
+ init.flags = 0;
+ init.parent_names = (parent_name ? &parent_name : NULL);
+ init.num_parents = (parent_name ? 1 : 0);
+ iclk->hw.init = &init;
+
+ clk = clk_register(NULL, &iclk->hw);
+ if (WARN_ON(IS_ERR(clk)))
+ goto err_clk_register;
+
+ pll->clk_data.clks[i] = clk;
+ }
+
+ ret = of_clk_add_provider(node, of_clk_src_onecell_get, &pll->clk_data);
+ if (WARN_ON(ret))
+ goto err_clk_register;
+
+ return;
+
+err_clk_register:
+ for (i = 0; i < num_clks; i++) {
+ kfree(pll->clks[i].name);
+ clk_unregister(pll->clk_data.clks[i]);
+ }
+
+err_pll_register:
+ if (pll->asiu_base)
+ iounmap(pll->asiu_base);
+
+err_asiu_iomap:
+ iounmap(pll->pwr_base);
+
+err_pwr_iomap:
+ iounmap(pll->pll_base);
+
+err_pll_iomap:
+ kfree(pll->clks);
+
+err_clks:
+ kfree(pll->clk_data.clks);
+
+err_clk_data:
+ kfree(pll);
+}
--- /dev/null
+/*
+ * Copyright (C) 2014 Broadcom Corporation
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation version 2.
+ *
+ * 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.
+ */
+
+#ifndef _CLK_IPROC_H
+#define _CLK_IPROC_H
+
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/spinlock.h>
+#include <linux/slab.h>
+#include <linux/device.h>
+#include <linux/of.h>
+#include <linux/clk-provider.h>
+
+#define IPROC_CLK_NAME_LEN 25
+#define IPROC_CLK_INVALID_OFFSET 0xffffffff
+#define bit_mask(width) ((1 << (width)) - 1)
+
+/* clocks that should not be disabled at runtime */
+#define IPROC_CLK_AON BIT(0)
+
+/* PLL that requires gating through ASIU */
+#define IPROC_CLK_PLL_ASIU BIT(1)
+
+/* PLL that has fractional part of the NDIV */
+#define IPROC_CLK_PLL_HAS_NDIV_FRAC BIT(2)
+
+/*
+ * Some of the iProc PLL/clocks may have an ASIC bug that requires read back
+ * of the same register following the write to flush the write transaction into
+ * the intended register
+ */
+#define IPROC_CLK_NEEDS_READ_BACK BIT(3)
+
+/*
+ * Some PLLs require the PLL SW override bit to be set before changes can be
+ * applied to the PLL
+ */
+#define IPROC_CLK_PLL_NEEDS_SW_CFG BIT(4)
+
+/*
+ * Parameters for VCO frequency configuration
+ *
+ * VCO frequency =
+ * ((ndiv_int + ndiv_frac / 2^20) * (ref freqeuncy / pdiv)
+ */
+struct iproc_pll_vco_param {
+ unsigned long rate;
+ unsigned int ndiv_int;
+ unsigned int ndiv_frac;
+ unsigned int pdiv;
+};
+
+struct iproc_clk_reg_op {
+ unsigned int offset;
+ unsigned int shift;
+ unsigned int width;
+};
+
+/*
+ * Clock gating control at the top ASIU level
+ */
+struct iproc_asiu_gate {
+ unsigned int offset;
+ unsigned int en_shift;
+};
+
+/*
+ * Control of powering on/off of a PLL
+ *
+ * Before powering off a PLL, input isolation (ISO) needs to be enabled
+ */
+struct iproc_pll_aon_pwr_ctrl {
+ unsigned int offset;
+ unsigned int pwr_width;
+ unsigned int pwr_shift;
+ unsigned int iso_shift;
+};
+
+/*
+ * Control of the PLL reset, with Ki, Kp, and Ka parameters
+ */
+struct iproc_pll_reset_ctrl {
+ unsigned int offset;
+ unsigned int reset_shift;
+ unsigned int p_reset_shift;
+ unsigned int ki_shift;
+ unsigned int ki_width;
+ unsigned int kp_shift;
+ unsigned int kp_width;
+ unsigned int ka_shift;
+ unsigned int ka_width;
+};
+
+/*
+ * To enable SW control of the PLL
+ */
+struct iproc_pll_sw_ctrl {
+ unsigned int offset;
+ unsigned int shift;
+};
+
+struct iproc_pll_vco_ctrl {
+ unsigned int u_offset;
+ unsigned int l_offset;
+};
+
+/*
+ * Main PLL control parameters
+ */
+struct iproc_pll_ctrl {
+ unsigned long flags;
+ struct iproc_pll_aon_pwr_ctrl aon;
+ struct iproc_asiu_gate asiu;
+ struct iproc_pll_reset_ctrl reset;
+ struct iproc_pll_sw_ctrl sw_ctrl;
+ struct iproc_clk_reg_op ndiv_int;
+ struct iproc_clk_reg_op ndiv_frac;
+ struct iproc_clk_reg_op pdiv;
+ struct iproc_pll_vco_ctrl vco_ctrl;
+ struct iproc_clk_reg_op status;
+};
+
+/*
+ * Controls enabling/disabling a PLL derived clock
+ */
+struct iproc_clk_enable_ctrl {
+ unsigned int offset;
+ unsigned int enable_shift;
+ unsigned int hold_shift;
+ unsigned int bypass_shift;
+};
+
+/*
+ * Main clock control parameters for clocks derived from the PLLs
+ */
+struct iproc_clk_ctrl {
+ unsigned int channel;
+ unsigned long flags;
+ struct iproc_clk_enable_ctrl enable;
+ struct iproc_clk_reg_op mdiv;
+};
+
+/*
+ * Divisor of the ASIU clocks
+ */
+struct iproc_asiu_div {
+ unsigned int offset;
+ unsigned int en_shift;
+ unsigned int high_shift;
+ unsigned int high_width;
+ unsigned int low_shift;
+ unsigned int low_width;
+};
+
+void __init iproc_armpll_setup(struct device_node *node);
+void __init iproc_pll_clk_setup(struct device_node *node,
+ const struct iproc_pll_ctrl *pll_ctrl,
+ const struct iproc_pll_vco_param *vco,
+ unsigned int num_vco_entries,
+ const struct iproc_clk_ctrl *clk_ctrl,
+ unsigned int num_clks);
+void __init iproc_asiu_setup(struct device_node *node,
+ const struct iproc_asiu_div *div,
+ const struct iproc_asiu_gate *gate,
+ unsigned int num_clks);
+
+#endif /* _CLK_IPROC_H */
projects / linux-beck.git / commitdiff