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path: root/drivers/clk/starfive/clk-starfive-jh7100.c
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Diffstat (limited to 'drivers/clk/starfive/clk-starfive-jh7100.c')
-rw-r--r--drivers/clk/starfive/clk-starfive-jh7100.c325
1 files changed, 0 insertions, 325 deletions
diff --git a/drivers/clk/starfive/clk-starfive-jh7100.c b/drivers/clk/starfive/clk-starfive-jh7100.c
index 691aeebc7092..eea52f16af0d 100644
--- a/drivers/clk/starfive/clk-starfive-jh7100.c
+++ b/drivers/clk/starfive/clk-starfive-jh7100.c
@@ -7,15 +7,10 @@
* Copyright (C) 2021 Emil Renner Berthing <kernel@esmil.dk>
*/
-#include <linux/bits.h>
#include <linux/clk-provider.h>
-#include <linux/debugfs.h>
#include <linux/device.h>
#include <linux/init.h>
-#include <linux/io.h>
-#include <linux/kernel.h>
#include <linux/mod_devicetable.h>
-#include <linux/module.h>
#include <linux/platform_device.h>
#include <dt-bindings/clock/starfive-jh7100.h>
@@ -269,326 +264,6 @@ static const struct jh7100_clk_data jh7100_clk_data[] __initconst = {
JH7100_GATE(JH7100_CLK_SYSERR_APB, "syserr_apb", 0, JH7100_CLK_APB2_BUS),
};
-static struct jh7100_clk *jh7100_clk_from(struct clk_hw *hw)
-{
- return container_of(hw, struct jh7100_clk, hw);
-}
-
-static struct jh7100_clk_priv *jh7100_priv_from(struct jh7100_clk *clk)
-{
- return container_of(clk, struct jh7100_clk_priv, reg[clk->idx]);
-}
-
-static u32 jh7100_clk_reg_get(struct jh7100_clk *clk)
-{
- struct jh7100_clk_priv *priv = jh7100_priv_from(clk);
- void __iomem *reg = priv->base + 4 * clk->idx;
-
- return readl_relaxed(reg);
-}
-
-static void jh7100_clk_reg_rmw(struct jh7100_clk *clk, u32 mask, u32 value)
-{
- struct jh7100_clk_priv *priv = jh7100_priv_from(clk);
- void __iomem *reg = priv->base + 4 * clk->idx;
- unsigned long flags;
-
- spin_lock_irqsave(&priv->rmw_lock, flags);
- value |= readl_relaxed(reg) & ~mask;
- writel_relaxed(value, reg);
- spin_unlock_irqrestore(&priv->rmw_lock, flags);
-}
-
-static int jh7100_clk_enable(struct clk_hw *hw)
-{
- struct jh7100_clk *clk = jh7100_clk_from(hw);
-
- jh7100_clk_reg_rmw(clk, JH7100_CLK_ENABLE, JH7100_CLK_ENABLE);
- return 0;
-}
-
-static void jh7100_clk_disable(struct clk_hw *hw)
-{
- struct jh7100_clk *clk = jh7100_clk_from(hw);
-
- jh7100_clk_reg_rmw(clk, JH7100_CLK_ENABLE, 0);
-}
-
-static int jh7100_clk_is_enabled(struct clk_hw *hw)
-{
- struct jh7100_clk *clk = jh7100_clk_from(hw);
-
- return !!(jh7100_clk_reg_get(clk) & JH7100_CLK_ENABLE);
-}
-
-static unsigned long jh7100_clk_recalc_rate(struct clk_hw *hw,
- unsigned long parent_rate)
-{
- struct jh7100_clk *clk = jh7100_clk_from(hw);
- u32 div = jh7100_clk_reg_get(clk) & JH7100_CLK_DIV_MASK;
-
- return div ? parent_rate / div : 0;
-}
-
-static int jh7100_clk_determine_rate(struct clk_hw *hw,
- struct clk_rate_request *req)
-{
- struct jh7100_clk *clk = jh7100_clk_from(hw);
- unsigned long parent = req->best_parent_rate;
- unsigned long rate = clamp(req->rate, req->min_rate, req->max_rate);
- unsigned long div = min_t(unsigned long, DIV_ROUND_UP(parent, rate), clk->max_div);
- unsigned long result = parent / div;
-
- /*
- * we want the result clamped by min_rate and max_rate if possible:
- * case 1: div hits the max divider value, which means it's less than
- * parent / rate, so the result is greater than rate and min_rate in
- * particular. we can't do anything about result > max_rate because the
- * divider doesn't go any further.
- * case 2: div = DIV_ROUND_UP(parent, rate) which means the result is
- * always lower or equal to rate and max_rate. however the result may
- * turn out lower than min_rate, but then the next higher rate is fine:
- * div - 1 = ceil(parent / rate) - 1 < parent / rate
- * and thus
- * min_rate <= rate < parent / (div - 1)
- */
- if (result < req->min_rate && div > 1)
- result = parent / (div - 1);
-
- req->rate = result;
- return 0;
-}
-
-static int jh7100_clk_set_rate(struct clk_hw *hw,
- unsigned long rate,
- unsigned long parent_rate)
-{
- struct jh7100_clk *clk = jh7100_clk_from(hw);
- unsigned long div = clamp(DIV_ROUND_CLOSEST(parent_rate, rate),
- 1UL, (unsigned long)clk->max_div);
-
- jh7100_clk_reg_rmw(clk, JH7100_CLK_DIV_MASK, div);
- return 0;
-}
-
-static unsigned long jh7100_clk_frac_recalc_rate(struct clk_hw *hw,
- unsigned long parent_rate)
-{
- struct jh7100_clk *clk = jh7100_clk_from(hw);
- u32 reg = jh7100_clk_reg_get(clk);
- unsigned long div100 = 100 * (reg & JH7100_CLK_INT_MASK) +
- ((reg & JH7100_CLK_FRAC_MASK) >> JH7100_CLK_FRAC_SHIFT);
-
- return (div100 >= JH7100_CLK_FRAC_MIN) ? 100 * parent_rate / div100 : 0;
-}
-
-static int jh7100_clk_frac_determine_rate(struct clk_hw *hw,
- struct clk_rate_request *req)
-{
- unsigned long parent100 = 100 * req->best_parent_rate;
- unsigned long rate = clamp(req->rate, req->min_rate, req->max_rate);
- unsigned long div100 = clamp(DIV_ROUND_CLOSEST(parent100, rate),
- JH7100_CLK_FRAC_MIN, JH7100_CLK_FRAC_MAX);
- unsigned long result = parent100 / div100;
-
- /* clamp the result as in jh7100_clk_determine_rate() above */
- if (result > req->max_rate && div100 < JH7100_CLK_FRAC_MAX)
- result = parent100 / (div100 + 1);
- if (result < req->min_rate && div100 > JH7100_CLK_FRAC_MIN)
- result = parent100 / (div100 - 1);
-
- req->rate = result;
- return 0;
-}
-
-static int jh7100_clk_frac_set_rate(struct clk_hw *hw,
- unsigned long rate,
- unsigned long parent_rate)
-{
- struct jh7100_clk *clk = jh7100_clk_from(hw);
- unsigned long div100 = clamp(DIV_ROUND_CLOSEST(100 * parent_rate, rate),
- JH7100_CLK_FRAC_MIN, JH7100_CLK_FRAC_MAX);
- u32 value = ((div100 % 100) << JH7100_CLK_FRAC_SHIFT) | (div100 / 100);
-
- jh7100_clk_reg_rmw(clk, JH7100_CLK_DIV_MASK, value);
- return 0;
-}
-
-static u8 jh7100_clk_get_parent(struct clk_hw *hw)
-{
- struct jh7100_clk *clk = jh7100_clk_from(hw);
- u32 value = jh7100_clk_reg_get(clk);
-
- return (value & JH7100_CLK_MUX_MASK) >> JH7100_CLK_MUX_SHIFT;
-}
-
-static int jh7100_clk_set_parent(struct clk_hw *hw, u8 index)
-{
- struct jh7100_clk *clk = jh7100_clk_from(hw);
- u32 value = (u32)index << JH7100_CLK_MUX_SHIFT;
-
- jh7100_clk_reg_rmw(clk, JH7100_CLK_MUX_MASK, value);
- return 0;
-}
-
-static int jh7100_clk_mux_determine_rate(struct clk_hw *hw,
- struct clk_rate_request *req)
-{
- return clk_mux_determine_rate_flags(hw, req, 0);
-}
-
-static int jh7100_clk_get_phase(struct clk_hw *hw)
-{
- struct jh7100_clk *clk = jh7100_clk_from(hw);
- u32 value = jh7100_clk_reg_get(clk);
-
- return (value & JH7100_CLK_INVERT) ? 180 : 0;
-}
-
-static int jh7100_clk_set_phase(struct clk_hw *hw, int degrees)
-{
- struct jh7100_clk *clk = jh7100_clk_from(hw);
- u32 value;
-
- if (degrees == 0)
- value = 0;
- else if (degrees == 180)
- value = JH7100_CLK_INVERT;
- else
- return -EINVAL;
-
- jh7100_clk_reg_rmw(clk, JH7100_CLK_INVERT, value);
- return 0;
-}
-
-#ifdef CONFIG_DEBUG_FS
-static void jh7100_clk_debug_init(struct clk_hw *hw, struct dentry *dentry)
-{
- static const struct debugfs_reg32 jh7100_clk_reg = {
- .name = "CTRL",
- .offset = 0,
- };
- struct jh7100_clk *clk = jh7100_clk_from(hw);
- struct jh7100_clk_priv *priv = jh7100_priv_from(clk);
- struct debugfs_regset32 *regset;
-
- regset = devm_kzalloc(priv->dev, sizeof(*regset), GFP_KERNEL);
- if (!regset)
- return;
-
- regset->regs = &jh7100_clk_reg;
- regset->nregs = 1;
- regset->base = priv->base + 4 * clk->idx;
-
- debugfs_create_regset32("registers", 0400, dentry, regset);
-}
-#else
-#define jh7100_clk_debug_init NULL
-#endif
-
-static const struct clk_ops jh7100_clk_gate_ops = {
- .enable = jh7100_clk_enable,
- .disable = jh7100_clk_disable,
- .is_enabled = jh7100_clk_is_enabled,
- .debug_init = jh7100_clk_debug_init,
-};
-
-static const struct clk_ops jh7100_clk_div_ops = {
- .recalc_rate = jh7100_clk_recalc_rate,
- .determine_rate = jh7100_clk_determine_rate,
- .set_rate = jh7100_clk_set_rate,
- .debug_init = jh7100_clk_debug_init,
-};
-
-static const struct clk_ops jh7100_clk_fdiv_ops = {
- .recalc_rate = jh7100_clk_frac_recalc_rate,
- .determine_rate = jh7100_clk_frac_determine_rate,
- .set_rate = jh7100_clk_frac_set_rate,
- .debug_init = jh7100_clk_debug_init,
-};
-
-static const struct clk_ops jh7100_clk_gdiv_ops = {
- .enable = jh7100_clk_enable,
- .disable = jh7100_clk_disable,
- .is_enabled = jh7100_clk_is_enabled,
- .recalc_rate = jh7100_clk_recalc_rate,
- .determine_rate = jh7100_clk_determine_rate,
- .set_rate = jh7100_clk_set_rate,
- .debug_init = jh7100_clk_debug_init,
-};
-
-static const struct clk_ops jh7100_clk_mux_ops = {
- .determine_rate = jh7100_clk_mux_determine_rate,
- .set_parent = jh7100_clk_set_parent,
- .get_parent = jh7100_clk_get_parent,
- .debug_init = jh7100_clk_debug_init,
-};
-
-static const struct clk_ops jh7100_clk_gmux_ops = {
- .enable = jh7100_clk_enable,
- .disable = jh7100_clk_disable,
- .is_enabled = jh7100_clk_is_enabled,
- .determine_rate = jh7100_clk_mux_determine_rate,
- .set_parent = jh7100_clk_set_parent,
- .get_parent = jh7100_clk_get_parent,
- .debug_init = jh7100_clk_debug_init,
-};
-
-static const struct clk_ops jh7100_clk_mdiv_ops = {
- .recalc_rate = jh7100_clk_recalc_rate,
- .determine_rate = jh7100_clk_determine_rate,
- .get_parent = jh7100_clk_get_parent,
- .set_parent = jh7100_clk_set_parent,
- .set_rate = jh7100_clk_set_rate,
- .debug_init = jh7100_clk_debug_init,
-};
-
-static const struct clk_ops jh7100_clk_gmd_ops = {
- .enable = jh7100_clk_enable,
- .disable = jh7100_clk_disable,
- .is_enabled = jh7100_clk_is_enabled,
- .recalc_rate = jh7100_clk_recalc_rate,
- .determine_rate = jh7100_clk_determine_rate,
- .get_parent = jh7100_clk_get_parent,
- .set_parent = jh7100_clk_set_parent,
- .set_rate = jh7100_clk_set_rate,
- .debug_init = jh7100_clk_debug_init,
-};
-
-static const struct clk_ops jh7100_clk_inv_ops = {
- .get_phase = jh7100_clk_get_phase,
- .set_phase = jh7100_clk_set_phase,
- .debug_init = jh7100_clk_debug_init,
-};
-
-const struct clk_ops *starfive_jh7100_clk_ops(u32 max)
-{
- if (max & JH7100_CLK_DIV_MASK) {
- if (max & JH7100_CLK_MUX_MASK) {
- if (max & JH7100_CLK_ENABLE)
- return &jh7100_clk_gmd_ops;
- return &jh7100_clk_mdiv_ops;
- }
- if (max & JH7100_CLK_ENABLE)
- return &jh7100_clk_gdiv_ops;
- if (max == JH7100_CLK_FRAC_MAX)
- return &jh7100_clk_fdiv_ops;
- return &jh7100_clk_div_ops;
- }
-
- if (max & JH7100_CLK_MUX_MASK) {
- if (max & JH7100_CLK_ENABLE)
- return &jh7100_clk_gmux_ops;
- return &jh7100_clk_mux_ops;
- }
-
- if (max & JH7100_CLK_ENABLE)
- return &jh7100_clk_gate_ops;
-
- return &jh7100_clk_inv_ops;
-}
-EXPORT_SYMBOL_GPL(starfive_jh7100_clk_ops);
-
static struct clk_hw *jh7100_clk_get(struct of_phandle_args *clkspec, void *data)
{
struct jh7100_clk_priv *priv = data;
generated by cgit v1.2.3 (git 2.39.1) at 2025-01-20 13:59:20 +0100