summaryrefslogtreecommitdiffstats
path: root/arch/arm/plat-spear/clock.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/arm/plat-spear/clock.c')
-rw-r--r--arch/arm/plat-spear/clock.c1005
1 files changed, 0 insertions, 1005 deletions
diff --git a/arch/arm/plat-spear/clock.c b/arch/arm/plat-spear/clock.c
deleted file mode 100644
index 67dd003..0000000
--- a/arch/arm/plat-spear/clock.c
+++ /dev/null
@@ -1,1005 +0,0 @@
-/*
- * arch/arm/plat-spear/clock.c
- *
- * Clock framework for SPEAr platform
- *
- * Copyright (C) 2009 ST Microelectronics
- * Viresh Kumar<viresh.kumar@st.com>
- *
- * This file is licensed under the terms of the GNU General Public
- * License version 2. This program is licensed "as is" without any
- * warranty of any kind, whether express or implied.
- */
-
-#include <linux/bug.h>
-#include <linux/clk.h>
-#include <linux/debugfs.h>
-#include <linux/err.h>
-#include <linux/io.h>
-#include <linux/list.h>
-#include <linux/module.h>
-#include <linux/spinlock.h>
-#include <plat/clock.h>
-
-static DEFINE_SPINLOCK(clocks_lock);
-static LIST_HEAD(root_clks);
-#ifdef CONFIG_DEBUG_FS
-static LIST_HEAD(clocks);
-#endif
-
-static void propagate_rate(struct clk *, int on_init);
-#ifdef CONFIG_DEBUG_FS
-static int clk_debugfs_reparent(struct clk *);
-#endif
-
-static int generic_clk_enable(struct clk *clk)
-{
- unsigned int val;
-
- if (!clk->en_reg)
- return -EFAULT;
-
- val = readl(clk->en_reg);
- if (unlikely(clk->flags & RESET_TO_ENABLE))
- val &= ~(1 << clk->en_reg_bit);
- else
- val |= 1 << clk->en_reg_bit;
-
- writel(val, clk->en_reg);
-
- return 0;
-}
-
-static void generic_clk_disable(struct clk *clk)
-{
- unsigned int val;
-
- if (!clk->en_reg)
- return;
-
- val = readl(clk->en_reg);
- if (unlikely(clk->flags & RESET_TO_ENABLE))
- val |= 1 << clk->en_reg_bit;
- else
- val &= ~(1 << clk->en_reg_bit);
-
- writel(val, clk->en_reg);
-}
-
-/* generic clk ops */
-static struct clkops generic_clkops = {
- .enable = generic_clk_enable,
- .disable = generic_clk_disable,
-};
-
-/* returns current programmed clocks clock info structure */
-static struct pclk_info *pclk_info_get(struct clk *clk)
-{
- unsigned int val, i;
- struct pclk_info *info = NULL;
-
- val = (readl(clk->pclk_sel->pclk_sel_reg) >> clk->pclk_sel_shift)
- & clk->pclk_sel->pclk_sel_mask;
-
- for (i = 0; i < clk->pclk_sel->pclk_count; i++) {
- if (clk->pclk_sel->pclk_info[i].pclk_val == val)
- info = &clk->pclk_sel->pclk_info[i];
- }
-
- return info;
-}
-
-/*
- * Set Update pclk, and pclk_info of clk and add clock sibling node to current
- * parents children list
- */
-static void clk_reparent(struct clk *clk, struct pclk_info *pclk_info)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&clocks_lock, flags);
- list_del(&clk->sibling);
- list_add(&clk->sibling, &pclk_info->pclk->children);
-
- clk->pclk = pclk_info->pclk;
- spin_unlock_irqrestore(&clocks_lock, flags);
-
-#ifdef CONFIG_DEBUG_FS
- clk_debugfs_reparent(clk);
-#endif
-}
-
-static void do_clk_disable(struct clk *clk)
-{
- if (!clk)
- return;
-
- if (!clk->usage_count) {
- WARN_ON(1);
- return;
- }
-
- clk->usage_count--;
-
- if (clk->usage_count == 0) {
- /*
- * Surely, there are no active childrens or direct users
- * of this clock
- */
- if (clk->pclk)
- do_clk_disable(clk->pclk);
-
- if (clk->ops && clk->ops->disable)
- clk->ops->disable(clk);
- }
-}
-
-static int do_clk_enable(struct clk *clk)
-{
- int ret = 0;
-
- if (!clk)
- return -EFAULT;
-
- if (clk->usage_count == 0) {
- if (clk->pclk) {
- ret = do_clk_enable(clk->pclk);
- if (ret)
- goto err;
- }
- if (clk->ops && clk->ops->enable) {
- ret = clk->ops->enable(clk);
- if (ret) {
- if (clk->pclk)
- do_clk_disable(clk->pclk);
- goto err;
- }
- }
- /*
- * Since the clock is going to be used for the first
- * time please reclac
- */
- if (clk->recalc) {
- ret = clk->recalc(clk);
- if (ret)
- goto err;
- }
- }
- clk->usage_count++;
-err:
- return ret;
-}
-
-/*
- * clk_enable - inform the system when the clock source should be running.
- * @clk: clock source
- *
- * If the clock can not be enabled/disabled, this should return success.
- *
- * Returns success (0) or negative errno.
- */
-int clk_enable(struct clk *clk)
-{
- unsigned long flags;
- int ret = 0;
-
- spin_lock_irqsave(&clocks_lock, flags);
- ret = do_clk_enable(clk);
- spin_unlock_irqrestore(&clocks_lock, flags);
- return ret;
-}
-EXPORT_SYMBOL(clk_enable);
-
-/*
- * clk_disable - inform the system when the clock source is no longer required.
- * @clk: clock source
- *
- * Inform the system that a clock source is no longer required by
- * a driver and may be shut down.
- *
- * Implementation detail: if the clock source is shared between
- * multiple drivers, clk_enable() calls must be balanced by the
- * same number of clk_disable() calls for the clock source to be
- * disabled.
- */
-void clk_disable(struct clk *clk)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&clocks_lock, flags);
- do_clk_disable(clk);
- spin_unlock_irqrestore(&clocks_lock, flags);
-}
-EXPORT_SYMBOL(clk_disable);
-
-/**
- * clk_get_rate - obtain the current clock rate (in Hz) for a clock source.
- * This is only valid once the clock source has been enabled.
- * @clk: clock source
- */
-unsigned long clk_get_rate(struct clk *clk)
-{
- unsigned long flags, rate;
-
- spin_lock_irqsave(&clocks_lock, flags);
- rate = clk->rate;
- spin_unlock_irqrestore(&clocks_lock, flags);
-
- return rate;
-}
-EXPORT_SYMBOL(clk_get_rate);
-
-/**
- * clk_set_parent - set the parent clock source for this clock
- * @clk: clock source
- * @parent: parent clock source
- *
- * Returns success (0) or negative errno.
- */
-int clk_set_parent(struct clk *clk, struct clk *parent)
-{
- int i, found = 0, val = 0;
- unsigned long flags;
-
- if (!clk || !parent)
- return -EFAULT;
- if (clk->pclk == parent)
- return 0;
- if (!clk->pclk_sel)
- return -EPERM;
-
- /* check if requested parent is in clk parent list */
- for (i = 0; i < clk->pclk_sel->pclk_count; i++) {
- if (clk->pclk_sel->pclk_info[i].pclk == parent) {
- found = 1;
- break;
- }
- }
-
- if (!found)
- return -EINVAL;
-
- spin_lock_irqsave(&clocks_lock, flags);
- /* reflect parent change in hardware */
- val = readl(clk->pclk_sel->pclk_sel_reg);
- val &= ~(clk->pclk_sel->pclk_sel_mask << clk->pclk_sel_shift);
- val |= clk->pclk_sel->pclk_info[i].pclk_val << clk->pclk_sel_shift;
- writel(val, clk->pclk_sel->pclk_sel_reg);
- spin_unlock_irqrestore(&clocks_lock, flags);
-
- /* reflect parent change in software */
- clk_reparent(clk, &clk->pclk_sel->pclk_info[i]);
-
- propagate_rate(clk, 0);
- return 0;
-}
-EXPORT_SYMBOL(clk_set_parent);
-
-/**
- * clk_set_rate - set the clock rate for a clock source
- * @clk: clock source
- * @rate: desired clock rate in Hz
- *
- * Returns success (0) or negative errno.
- */
-int clk_set_rate(struct clk *clk, unsigned long rate)
-{
- unsigned long flags;
- int ret = -EINVAL;
-
- if (!clk || !rate)
- return -EFAULT;
-
- if (clk->set_rate) {
- spin_lock_irqsave(&clocks_lock, flags);
- ret = clk->set_rate(clk, rate);
- if (!ret)
- /* if successful -> propagate */
- propagate_rate(clk, 0);
- spin_unlock_irqrestore(&clocks_lock, flags);
- } else if (clk->pclk) {
- u32 mult = clk->div_factor ? clk->div_factor : 1;
- ret = clk_set_rate(clk->pclk, mult * rate);
- }
-
- return ret;
-}
-EXPORT_SYMBOL(clk_set_rate);
-
-/* registers clock in platform clock framework */
-void clk_register(struct clk_lookup *cl)
-{
- struct clk *clk;
- unsigned long flags;
-
- if (!cl || !cl->clk)
- return;
- clk = cl->clk;
-
- spin_lock_irqsave(&clocks_lock, flags);
-
- INIT_LIST_HEAD(&clk->children);
- if (clk->flags & ALWAYS_ENABLED)
- clk->ops = NULL;
- else if (!clk->ops)
- clk->ops = &generic_clkops;
-
- /* root clock don't have any parents */
- if (!clk->pclk && !clk->pclk_sel) {
- list_add(&clk->sibling, &root_clks);
- } else if (clk->pclk && !clk->pclk_sel) {
- /* add clocks with only one parent to parent's children list */
- list_add(&clk->sibling, &clk->pclk->children);
- } else {
- /* clocks with more than one parent */
- struct pclk_info *pclk_info;
-
- pclk_info = pclk_info_get(clk);
- if (!pclk_info) {
- pr_err("CLKDEV: invalid pclk info of clk with"
- " %s dev_id and %s con_id\n",
- cl->dev_id, cl->con_id);
- } else {
- clk->pclk = pclk_info->pclk;
- list_add(&clk->sibling, &pclk_info->pclk->children);
- }
- }
-
- spin_unlock_irqrestore(&clocks_lock, flags);
-
- /* debugfs specific */
-#ifdef CONFIG_DEBUG_FS
- list_add(&clk->node, &clocks);
- clk->cl = cl;
-#endif
-
- /* add clock to arm clockdev framework */
- clkdev_add(cl);
-}
-
-/**
- * propagate_rate - recalculate and propagate all clocks to children
- * @pclk: parent clock required to be propogated
- * @on_init: flag for enabling clocks which are ENABLED_ON_INIT.
- *
- * Recalculates all children clocks
- */
-void propagate_rate(struct clk *pclk, int on_init)
-{
- struct clk *clk, *_temp;
- int ret = 0;
-
- list_for_each_entry_safe(clk, _temp, &pclk->children, sibling) {
- if (clk->recalc) {
- ret = clk->recalc(clk);
- /*
- * recalc will return error if clk out is not programmed
- * In this case configure default rate.
- */
- if (ret && clk->set_rate)
- clk->set_rate(clk, 0);
- }
- propagate_rate(clk, on_init);
-
- if (!on_init)
- continue;
-
- /* Enable clks enabled on init, in software view */
- if (clk->flags & ENABLED_ON_INIT)
- do_clk_enable(clk);
- }
-}
-
-/**
- * round_rate_index - return closest programmable rate index in rate_config tbl
- * @clk: ptr to clock structure
- * @drate: desired rate
- * @rate: final rate will be returned in this variable only.
- *
- * Finds index in rate_config for highest clk rate which is less than
- * requested rate. If there is no clk rate lesser than requested rate then
- * -EINVAL is returned. This routine assumes that rate_config is written
- * in incrementing order of clk rates.
- * If drate passed is zero then default rate is programmed.
- */
-static int
-round_rate_index(struct clk *clk, unsigned long drate, unsigned long *rate)
-{
- unsigned long tmp = 0, prev_rate = 0;
- int index;
-
- if (!clk->calc_rate)
- return -EFAULT;
-
- if (!drate)
- return -EINVAL;
-
- /*
- * This loops ends on two conditions:
- * - as soon as clk is found with rate greater than requested rate.
- * - if all clks in rate_config are smaller than requested rate.
- */
- for (index = 0; index < clk->rate_config.count; index++) {
- prev_rate = tmp;
- tmp = clk->calc_rate(clk, index);
- if (drate < tmp) {
- index--;
- break;
- }
- }
- /* return if can't find suitable clock */
- if (index < 0) {
- index = -EINVAL;
- *rate = 0;
- } else if (index == clk->rate_config.count) {
- /* program with highest clk rate possible */
- index = clk->rate_config.count - 1;
- *rate = tmp;
- } else
- *rate = prev_rate;
-
- return index;
-}
-
-/**
- * clk_round_rate - adjust a rate to the exact rate a clock can provide
- * @clk: clock source
- * @rate: desired clock rate in Hz
- *
- * Returns rounded clock rate in Hz, or negative errno.
- */
-long clk_round_rate(struct clk *clk, unsigned long drate)
-{
- long rate = 0;
- int index;
-
- /*
- * propagate call to parent who supports calc_rate. Similar approach is
- * used in clk_set_rate.
- */
- if (!clk->calc_rate) {
- u32 mult;
- if (!clk->pclk)
- return clk->rate;
-
- mult = clk->div_factor ? clk->div_factor : 1;
- return clk_round_rate(clk->pclk, mult * drate) / mult;
- }
-
- index = round_rate_index(clk, drate, &rate);
- if (index >= 0)
- return rate;
- else
- return index;
-}
-EXPORT_SYMBOL(clk_round_rate);
-
-/*All below functions are called with lock held */
-
-/*
- * Calculates pll clk rate for specific value of mode, m, n and p
- *
- * In normal mode
- * rate = (2 * M[15:8] * Fin)/(N * 2^P)
- *
- * In Dithered mode
- * rate = (2 * M[15:0] * Fin)/(256 * N * 2^P)
- */
-unsigned long pll_calc_rate(struct clk *clk, int index)
-{
- unsigned long rate = clk->pclk->rate;
- struct pll_rate_tbl *tbls = clk->rate_config.tbls;
- unsigned int mode;
-
- mode = tbls[index].mode ? 256 : 1;
- return (((2 * rate / 10000) * tbls[index].m) /
- (mode * tbls[index].n * (1 << tbls[index].p))) * 10000;
-}
-
-/*
- * calculates current programmed rate of pll1
- *
- * In normal mode
- * rate = (2 * M[15:8] * Fin)/(N * 2^P)
- *
- * In Dithered mode
- * rate = (2 * M[15:0] * Fin)/(256 * N * 2^P)
- */
-int pll_clk_recalc(struct clk *clk)
-{
- struct pll_clk_config *config = clk->private_data;
- unsigned int num = 2, den = 0, val, mode = 0;
-
- mode = (readl(config->mode_reg) >> config->masks->mode_shift) &
- config->masks->mode_mask;
-
- val = readl(config->cfg_reg);
- /* calculate denominator */
- den = (val >> config->masks->div_p_shift) & config->masks->div_p_mask;
- den = 1 << den;
- den *= (val >> config->masks->div_n_shift) & config->masks->div_n_mask;
-
- /* calculate numerator & denominator */
- if (!mode) {
- /* Normal mode */
- num *= (val >> config->masks->norm_fdbk_m_shift) &
- config->masks->norm_fdbk_m_mask;
- } else {
- /* Dithered mode */
- num *= (val >> config->masks->dith_fdbk_m_shift) &
- config->masks->dith_fdbk_m_mask;
- den *= 256;
- }
-
- if (!den)
- return -EINVAL;
-
- clk->rate = (((clk->pclk->rate/10000) * num) / den) * 10000;
- return 0;
-}
-
-/*
- * Configures new clock rate of pll
- */
-int pll_clk_set_rate(struct clk *clk, unsigned long desired_rate)
-{
- struct pll_rate_tbl *tbls = clk->rate_config.tbls;
- struct pll_clk_config *config = clk->private_data;
- unsigned long val, rate;
- int i;
-
- i = round_rate_index(clk, desired_rate, &rate);
- if (i < 0)
- return i;
-
- val = readl(config->mode_reg) &
- ~(config->masks->mode_mask << config->masks->mode_shift);
- val |= (tbls[i].mode & config->masks->mode_mask) <<
- config->masks->mode_shift;
- writel(val, config->mode_reg);
-
- val = readl(config->cfg_reg) &
- ~(config->masks->div_p_mask << config->masks->div_p_shift);
- val |= (tbls[i].p & config->masks->div_p_mask) <<
- config->masks->div_p_shift;
- val &= ~(config->masks->div_n_mask << config->masks->div_n_shift);
- val |= (tbls[i].n & config->masks->div_n_mask) <<
- config->masks->div_n_shift;
- val &= ~(config->masks->dith_fdbk_m_mask <<
- config->masks->dith_fdbk_m_shift);
- if (tbls[i].mode)
- val |= (tbls[i].m & config->masks->dith_fdbk_m_mask) <<
- config->masks->dith_fdbk_m_shift;
- else
- val |= (tbls[i].m & config->masks->norm_fdbk_m_mask) <<
- config->masks->norm_fdbk_m_shift;
-
- writel(val, config->cfg_reg);
-
- clk->rate = rate;
-
- return 0;
-}
-
-/*
- * Calculates ahb, apb clk rate for specific value of div
- */
-unsigned long bus_calc_rate(struct clk *clk, int index)
-{
- unsigned long rate = clk->pclk->rate;
- struct bus_rate_tbl *tbls = clk->rate_config.tbls;
-
- return rate / (tbls[index].div + 1);
-}
-
-/* calculates current programmed rate of ahb or apb bus */
-int bus_clk_recalc(struct clk *clk)
-{
- struct bus_clk_config *config = clk->private_data;
- unsigned int div;
-
- div = ((readl(config->reg) >> config->masks->shift) &
- config->masks->mask) + 1;
-
- if (!div)
- return -EINVAL;
-
- clk->rate = (unsigned long)clk->pclk->rate / div;
- return 0;
-}
-
-/* Configures new clock rate of AHB OR APB bus */
-int bus_clk_set_rate(struct clk *clk, unsigned long desired_rate)
-{
- struct bus_rate_tbl *tbls = clk->rate_config.tbls;
- struct bus_clk_config *config = clk->private_data;
- unsigned long val, rate;
- int i;
-
- i = round_rate_index(clk, desired_rate, &rate);
- if (i < 0)
- return i;
-
- val = readl(config->reg) &
- ~(config->masks->mask << config->masks->shift);
- val |= (tbls[i].div & config->masks->mask) << config->masks->shift;
- writel(val, config->reg);
-
- clk->rate = rate;
-
- return 0;
-}
-
-/*
- * gives rate for different values of eq, x and y
- *
- * Fout from synthesizer can be given from two equations:
- * Fout1 = (Fin * X/Y)/2 EQ1
- * Fout2 = Fin * X/Y EQ2
- */
-unsigned long aux_calc_rate(struct clk *clk, int index)
-{
- unsigned long rate = clk->pclk->rate;
- struct aux_rate_tbl *tbls = clk->rate_config.tbls;
- u8 eq = tbls[index].eq ? 1 : 2;
-
- return (((rate/10000) * tbls[index].xscale) /
- (tbls[index].yscale * eq)) * 10000;
-}
-
-/*
- * calculates current programmed rate of auxiliary synthesizers
- * used by: UART, FIRDA
- *
- * Fout from synthesizer can be given from two equations:
- * Fout1 = (Fin * X/Y)/2
- * Fout2 = Fin * X/Y
- *
- * Selection of eqn 1 or 2 is programmed in register
- */
-int aux_clk_recalc(struct clk *clk)
-{
- struct aux_clk_config *config = clk->private_data;
- unsigned int num = 1, den = 1, val, eqn;
-
- val = readl(config->synth_reg);
-
- eqn = (val >> config->masks->eq_sel_shift) &
- config->masks->eq_sel_mask;
- if (eqn == config->masks->eq1_mask)
- den *= 2;
-
- /* calculate numerator */
- num = (val >> config->masks->xscale_sel_shift) &
- config->masks->xscale_sel_mask;
-
- /* calculate denominator */
- den *= (val >> config->masks->yscale_sel_shift) &
- config->masks->yscale_sel_mask;
-
- if (!den)
- return -EINVAL;
-
- clk->rate = (((clk->pclk->rate/10000) * num) / den) * 10000;
- return 0;
-}
-
-/* Configures new clock rate of auxiliary synthesizers used by: UART, FIRDA*/
-int aux_clk_set_rate(struct clk *clk, unsigned long desired_rate)
-{
- struct aux_rate_tbl *tbls = clk->rate_config.tbls;
- struct aux_clk_config *config = clk->private_data;
- unsigned long val, rate;
- int i;
-
- i = round_rate_index(clk, desired_rate, &rate);
- if (i < 0)
- return i;
-
- val = readl(config->synth_reg) &
- ~(config->masks->eq_sel_mask << config->masks->eq_sel_shift);
- val |= (tbls[i].eq & config->masks->eq_sel_mask) <<
- config->masks->eq_sel_shift;
- val &= ~(config->masks->xscale_sel_mask <<
- config->masks->xscale_sel_shift);
- val |= (tbls[i].xscale & config->masks->xscale_sel_mask) <<
- config->masks->xscale_sel_shift;
- val &= ~(config->masks->yscale_sel_mask <<
- config->masks->yscale_sel_shift);
- val |= (tbls[i].yscale & config->masks->yscale_sel_mask) <<
- config->masks->yscale_sel_shift;
- writel(val, config->synth_reg);
-
- clk->rate = rate;
-
- return 0;
-}
-
-/*
- * Calculates gpt clk rate for different values of mscale and nscale
- *
- * Fout= Fin/((2 ^ (N+1)) * (M+1))
- */
-unsigned long gpt_calc_rate(struct clk *clk, int index)
-{
- unsigned long rate = clk->pclk->rate;
- struct gpt_rate_tbl *tbls = clk->rate_config.tbls;
-
- return rate / ((1 << (tbls[index].nscale + 1)) *
- (tbls[index].mscale + 1));
-}
-
-/*
- * calculates current programmed rate of gpt synthesizers
- * Fout from synthesizer can be given from below equations:
- * Fout= Fin/((2 ^ (N+1)) * (M+1))
- */
-int gpt_clk_recalc(struct clk *clk)
-{
- struct gpt_clk_config *config = clk->private_data;
- unsigned int div = 1, val;
-
- val = readl(config->synth_reg);
- div += (val >> config->masks->mscale_sel_shift) &
- config->masks->mscale_sel_mask;
- div *= 1 << (((val >> config->masks->nscale_sel_shift) &
- config->masks->nscale_sel_mask) + 1);
-
- if (!div)
- return -EINVAL;
-
- clk->rate = (unsigned long)clk->pclk->rate / div;
- return 0;
-}
-
-/* Configures new clock rate of gptiliary synthesizers used by: UART, FIRDA*/
-int gpt_clk_set_rate(struct clk *clk, unsigned long desired_rate)
-{
- struct gpt_rate_tbl *tbls = clk->rate_config.tbls;
- struct gpt_clk_config *config = clk->private_data;
- unsigned long val, rate;
- int i;
-
- i = round_rate_index(clk, desired_rate, &rate);
- if (i < 0)
- return i;
-
- val = readl(config->synth_reg) & ~(config->masks->mscale_sel_mask <<
- config->masks->mscale_sel_shift);
- val |= (tbls[i].mscale & config->masks->mscale_sel_mask) <<
- config->masks->mscale_sel_shift;
- val &= ~(config->masks->nscale_sel_mask <<
- config->masks->nscale_sel_shift);
- val |= (tbls[i].nscale & config->masks->nscale_sel_mask) <<
- config->masks->nscale_sel_shift;
- writel(val, config->synth_reg);
-
- clk->rate = rate;
-
- return 0;
-}
-
-/*
- * Calculates clcd clk rate for different values of div
- *
- * Fout from synthesizer can be given from below equation:
- * Fout= Fin/2*div (division factor)
- * div is 17 bits:-
- * 0-13 (fractional part)
- * 14-16 (integer part)
- * To calculate Fout we left shift val by 14 bits and divide Fin by
- * complete div (including fractional part) and then right shift the
- * result by 14 places.
- */
-unsigned long clcd_calc_rate(struct clk *clk, int index)
-{
- unsigned long rate = clk->pclk->rate;
- struct clcd_rate_tbl *tbls = clk->rate_config.tbls;
-
- rate /= 1000;
- rate <<= 12;
- rate /= (2 * tbls[index].div);
- rate >>= 12;
- rate *= 1000;
-
- return rate;
-}
-
-/*
- * calculates current programmed rate of clcd synthesizer
- * Fout from synthesizer can be given from below equation:
- * Fout= Fin/2*div (division factor)
- * div is 17 bits:-
- * 0-13 (fractional part)
- * 14-16 (integer part)
- * To calculate Fout we left shift val by 14 bits and divide Fin by
- * complete div (including fractional part) and then right shift the
- * result by 14 places.
- */
-int clcd_clk_recalc(struct clk *clk)
-{
- struct clcd_clk_config *config = clk->private_data;
- unsigned int div = 1;
- unsigned long prate;
- unsigned int val;
-
- val = readl(config->synth_reg);
- div = (val >> config->masks->div_factor_shift) &
- config->masks->div_factor_mask;
-
- if (!div)
- return -EINVAL;
-
- prate = clk->pclk->rate / 1000; /* first level division, make it KHz */
-
- clk->rate = (((unsigned long)prate << 12) / (2 * div)) >> 12;
- clk->rate *= 1000;
- return 0;
-}
-
-/* Configures new clock rate of auxiliary synthesizers used by: UART, FIRDA*/
-int clcd_clk_set_rate(struct clk *clk, unsigned long desired_rate)
-{
- struct clcd_rate_tbl *tbls = clk->rate_config.tbls;
- struct clcd_clk_config *config = clk->private_data;
- unsigned long val, rate;
- int i;
-
- i = round_rate_index(clk, desired_rate, &rate);
- if (i < 0)
- return i;
-
- val = readl(config->synth_reg) & ~(config->masks->div_factor_mask <<
- config->masks->div_factor_shift);
- val |= (tbls[i].div & config->masks->div_factor_mask) <<
- config->masks->div_factor_shift;
- writel(val, config->synth_reg);
-
- clk->rate = rate;
-
- return 0;
-}
-
-/*
- * Used for clocks that always have value as the parent clock divided by a
- * fixed divisor
- */
-int follow_parent(struct clk *clk)
-{
- unsigned int div_factor = (clk->div_factor < 1) ? 1 : clk->div_factor;
-
- clk->rate = clk->pclk->rate/div_factor;
- return 0;
-}
-
-/**
- * recalc_root_clocks - recalculate and propagate all root clocks
- *
- * Recalculates all root clocks (clocks with no parent), which if the
- * clock's .recalc is set correctly, should also propagate their rates.
- */
-void recalc_root_clocks(void)
-{
- struct clk *pclk;
- unsigned long flags;
- int ret = 0;
-
- spin_lock_irqsave(&clocks_lock, flags);
- list_for_each_entry(pclk, &root_clks, sibling) {
- if (pclk->recalc) {
- ret = pclk->recalc(pclk);
- /*
- * recalc will return error if clk out is not programmed
- * In this case configure default clock.
- */
- if (ret && pclk->set_rate)
- pclk->set_rate(pclk, 0);
- }
- propagate_rate(pclk, 1);
- /* Enable clks enabled on init, in software view */
- if (pclk->flags & ENABLED_ON_INIT)
- do_clk_enable(pclk);
- }
- spin_unlock_irqrestore(&clocks_lock, flags);
-}
-
-void __init clk_init(void)
-{
- recalc_root_clocks();
-}
-
-#ifdef CONFIG_DEBUG_FS
-/*
- * debugfs support to trace clock tree hierarchy and attributes
- */
-static struct dentry *clk_debugfs_root;
-static int clk_debugfs_register_one(struct clk *c)
-{
- int err;
- struct dentry *d;
- struct clk *pa = c->pclk;
- char s[255];
- char *p = s;
-
- if (c) {
- if (c->cl->con_id)
- p += sprintf(p, "%s", c->cl->con_id);
- if (c->cl->dev_id)
- p += sprintf(p, "%s", c->cl->dev_id);
- }
- d = debugfs_create_dir(s, pa ? pa->dent : clk_debugfs_root);
- if (!d)
- return -ENOMEM;
- c->dent = d;
-
- d = debugfs_create_u32("usage_count", S_IRUGO, c->dent,
- (u32 *)&c->usage_count);
- if (!d) {
- err = -ENOMEM;
- goto err_out;
- }
- d = debugfs_create_u32("rate", S_IRUGO, c->dent, (u32 *)&c->rate);
- if (!d) {
- err = -ENOMEM;
- goto err_out;
- }
- d = debugfs_create_x32("flags", S_IRUGO, c->dent, (u32 *)&c->flags);
- if (!d) {
- err = -ENOMEM;
- goto err_out;
- }
- return 0;
-
-err_out:
- debugfs_remove_recursive(c->dent);
- return err;
-}
-
-static int clk_debugfs_register(struct clk *c)
-{
- int err;
- struct clk *pa = c->pclk;
-
- if (pa && !pa->dent) {
- err = clk_debugfs_register(pa);
- if (err)
- return err;
- }
-
- if (!c->dent) {
- err = clk_debugfs_register_one(c);
- if (err)
- return err;
- }
- return 0;
-}
-
-static int __init clk_debugfs_init(void)
-{
- struct clk *c;
- struct dentry *d;
- int err;
-
- d = debugfs_create_dir("clock", NULL);
- if (!d)
- return -ENOMEM;
- clk_debugfs_root = d;
-
- list_for_each_entry(c, &clocks, node) {
- err = clk_debugfs_register(c);
- if (err)
- goto err_out;
- }
- return 0;
-err_out:
- debugfs_remove_recursive(clk_debugfs_root);
- return err;
-}
-late_initcall(clk_debugfs_init);
-
-static int clk_debugfs_reparent(struct clk *c)
-{
- debugfs_remove(c->dent);
- return clk_debugfs_register_one(c);
-}
-#endif /* CONFIG_DEBUG_FS */