From 61598093bbdd283a7edc367d900f223070ead8d2 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Fri, 10 May 2024 07:43:03 +0000
Subject: [PATCH] add ax88772C AX88772C_eeprom_tools
---
kernel/drivers/clk/ti/divider.c | 407 +++++++++++++++++++++------------------------------------
1 files changed, 152 insertions(+), 255 deletions(-)
diff --git a/kernel/drivers/clk/ti/divider.c b/kernel/drivers/clk/ti/divider.c
index 99bafe9..28080df 100644
--- a/kernel/drivers/clk/ti/divider.c
+++ b/kernel/drivers/clk/ti/divider.c
@@ -26,30 +26,6 @@
#undef pr_fmt
#define pr_fmt(fmt) "%s: " fmt, __func__
-#define div_mask(d) ((1 << ((d)->width)) - 1)
-
-static unsigned int _get_table_maxdiv(const struct clk_div_table *table)
-{
- unsigned int maxdiv = 0;
- const struct clk_div_table *clkt;
-
- for (clkt = table; clkt->div; clkt++)
- if (clkt->div > maxdiv)
- maxdiv = clkt->div;
- return maxdiv;
-}
-
-static unsigned int _get_maxdiv(struct clk_omap_divider *divider)
-{
- if (divider->flags & CLK_DIVIDER_ONE_BASED)
- return div_mask(divider);
- if (divider->flags & CLK_DIVIDER_POWER_OF_TWO)
- return 1 << div_mask(divider);
- if (divider->table)
- return _get_table_maxdiv(divider->table);
- return div_mask(divider) + 1;
-}
-
static unsigned int _get_table_div(const struct clk_div_table *table,
unsigned int val)
{
@@ -59,6 +35,34 @@
if (clkt->val == val)
return clkt->div;
return 0;
+}
+
+static void _setup_mask(struct clk_omap_divider *divider)
+{
+ u16 mask;
+ u32 max_val;
+ const struct clk_div_table *clkt;
+
+ if (divider->table) {
+ max_val = 0;
+
+ for (clkt = divider->table; clkt->div; clkt++)
+ if (clkt->val > max_val)
+ max_val = clkt->val;
+ } else {
+ max_val = divider->max;
+
+ if (!(divider->flags & CLK_DIVIDER_ONE_BASED) &&
+ !(divider->flags & CLK_DIVIDER_POWER_OF_TWO))
+ max_val--;
+ }
+
+ if (divider->flags & CLK_DIVIDER_POWER_OF_TWO)
+ mask = fls(max_val) - 1;
+ else
+ mask = max_val;
+
+ divider->mask = (1 << fls(mask)) - 1;
}
static unsigned int _get_div(struct clk_omap_divider *divider, unsigned int val)
@@ -101,7 +105,7 @@
unsigned int div, val;
val = ti_clk_ll_ops->clk_readl(÷r->reg) >> divider->shift;
- val &= div_mask(divider);
+ val &= divider->mask;
div = _get_div(divider, val);
if (!div) {
@@ -180,7 +184,7 @@
if (!rate)
rate = 1;
- maxdiv = _get_maxdiv(divider);
+ maxdiv = divider->max;
if (!(clk_hw_get_flags(hw) & CLK_SET_RATE_PARENT)) {
parent_rate = *best_parent_rate;
@@ -219,7 +223,7 @@
}
if (!bestdiv) {
- bestdiv = _get_maxdiv(divider);
+ bestdiv = divider->max;
*best_parent_rate =
clk_hw_round_rate(clk_hw_get_parent(hw), 1);
}
@@ -249,17 +253,16 @@
divider = to_clk_omap_divider(hw);
div = DIV_ROUND_UP(parent_rate, rate);
+
+ if (div > divider->max)
+ div = divider->max;
+ if (div < divider->min)
+ div = divider->min;
+
value = _get_val(divider, div);
- if (value > div_mask(divider))
- value = div_mask(divider);
-
- if (divider->flags & CLK_DIVIDER_HIWORD_MASK) {
- val = div_mask(divider) << (divider->shift + 16);
- } else {
- val = ti_clk_ll_ops->clk_readl(÷r->reg);
- val &= ~(div_mask(divider) << divider->shift);
- }
+ val = ti_clk_ll_ops->clk_readl(÷r->reg);
+ val &= ~(divider->mask << divider->shift);
val |= value << divider->shift;
ti_clk_ll_ops->clk_writel(val, ÷r->reg);
@@ -268,53 +271,68 @@
return 0;
}
+/**
+ * clk_divider_save_context - Save the divider value
+ * @hw: pointer struct clk_hw
+ *
+ * Save the divider value
+ */
+static int clk_divider_save_context(struct clk_hw *hw)
+{
+ struct clk_omap_divider *divider = to_clk_omap_divider(hw);
+ u32 val;
+
+ val = ti_clk_ll_ops->clk_readl(÷r->reg) >> divider->shift;
+ divider->context = val & divider->mask;
+
+ return 0;
+}
+
+/**
+ * clk_divider_restore_context - restore the saved the divider value
+ * @hw: pointer struct clk_hw
+ *
+ * Restore the saved the divider value
+ */
+static void clk_divider_restore_context(struct clk_hw *hw)
+{
+ struct clk_omap_divider *divider = to_clk_omap_divider(hw);
+ u32 val;
+
+ val = ti_clk_ll_ops->clk_readl(÷r->reg);
+ val &= ~(divider->mask << divider->shift);
+ val |= divider->context << divider->shift;
+ ti_clk_ll_ops->clk_writel(val, ÷r->reg);
+}
+
const struct clk_ops ti_clk_divider_ops = {
.recalc_rate = ti_clk_divider_recalc_rate,
.round_rate = ti_clk_divider_round_rate,
.set_rate = ti_clk_divider_set_rate,
+ .save_context = clk_divider_save_context,
+ .restore_context = clk_divider_restore_context,
};
-static struct clk *_register_divider(struct device *dev, const char *name,
- const char *parent_name,
- unsigned long flags,
- struct clk_omap_reg *reg,
- u8 shift, u8 width, s8 latch,
- u8 clk_divider_flags,
- const struct clk_div_table *table)
+static struct clk *_register_divider(struct device_node *node,
+ u32 flags,
+ struct clk_omap_divider *div)
{
- struct clk_omap_divider *div;
struct clk *clk;
- struct clk_init_data init = {};
+ struct clk_init_data init;
+ const char *parent_name;
- if (clk_divider_flags & CLK_DIVIDER_HIWORD_MASK) {
- if (width + shift > 16) {
- pr_warn("divider value exceeds LOWORD field\n");
- return ERR_PTR(-EINVAL);
- }
- }
+ parent_name = of_clk_get_parent_name(node, 0);
- /* allocate the divider */
- div = kzalloc(sizeof(*div), GFP_KERNEL);
- if (!div)
- return ERR_PTR(-ENOMEM);
-
- init.name = name;
+ init.name = node->name;
init.ops = &ti_clk_divider_ops;
- init.flags = flags | CLK_IS_BASIC;
+ init.flags = flags;
init.parent_names = (parent_name ? &parent_name : NULL);
init.num_parents = (parent_name ? 1 : 0);
- /* struct clk_divider assignments */
- memcpy(&div->reg, reg, sizeof(*reg));
- div->shift = shift;
- div->width = width;
- div->latch = latch;
- div->flags = clk_divider_flags;
div->hw.init = &init;
- div->table = table;
/* register the clock */
- clk = ti_clk_register(dev, &div->hw, name);
+ clk = ti_clk_register(NULL, &div->hw, node->name);
if (IS_ERR(clk))
kfree(div);
@@ -323,34 +341,17 @@
}
int ti_clk_parse_divider_data(int *div_table, int num_dividers, int max_div,
- u8 flags, u8 *width,
- const struct clk_div_table **table)
+ u8 flags, struct clk_omap_divider *divider)
{
int valid_div = 0;
- u32 val;
- int div;
int i;
struct clk_div_table *tmp;
+ u16 min_div = 0;
if (!div_table) {
- if (flags & CLKF_INDEX_STARTS_AT_ONE)
- val = 1;
- else
- val = 0;
-
- div = 1;
-
- while (div < max_div) {
- if (flags & CLKF_INDEX_POWER_OF_TWO)
- div <<= 1;
- else
- div++;
- val++;
- }
-
- *width = fls(val);
- *table = NULL;
-
+ divider->min = 1;
+ divider->max = max_div;
+ _setup_mask(divider);
return 0;
}
@@ -367,115 +368,32 @@
num_dividers = i;
tmp = kcalloc(valid_div + 1, sizeof(*tmp), GFP_KERNEL);
- if (!tmp) {
- *table = ERR_PTR(-ENOMEM);
+ if (!tmp)
return -ENOMEM;
- }
valid_div = 0;
- *width = 0;
for (i = 0; i < num_dividers; i++)
if (div_table[i] > 0) {
tmp[valid_div].div = div_table[i];
tmp[valid_div].val = i;
valid_div++;
- *width = i;
+ if (div_table[i] > max_div)
+ max_div = div_table[i];
+ if (!min_div || div_table[i] < min_div)
+ min_div = div_table[i];
}
- *width = fls(*width);
- *table = tmp;
+ divider->min = min_div;
+ divider->max = max_div;
+ divider->table = tmp;
+ _setup_mask(divider);
return 0;
}
-static const struct clk_div_table *
-_get_div_table_from_setup(struct ti_clk_divider *setup, u8 *width)
-{
- const struct clk_div_table *table = NULL;
-
- ti_clk_parse_divider_data(setup->dividers, setup->num_dividers,
- setup->max_div, setup->flags, width,
- &table);
-
- return table;
-}
-
-struct clk_hw *ti_clk_build_component_div(struct ti_clk_divider *setup)
-{
- struct clk_omap_divider *div;
- struct clk_omap_reg *reg;
- int ret;
-
- if (!setup)
- return NULL;
-
- div = kzalloc(sizeof(*div), GFP_KERNEL);
- if (!div)
- return ERR_PTR(-ENOMEM);
-
- reg = (struct clk_omap_reg *)&div->reg;
- reg->index = setup->module;
- reg->offset = setup->reg;
-
- if (setup->flags & CLKF_INDEX_STARTS_AT_ONE)
- div->flags |= CLK_DIVIDER_ONE_BASED;
-
- if (setup->flags & CLKF_INDEX_POWER_OF_TWO)
- div->flags |= CLK_DIVIDER_POWER_OF_TWO;
-
- div->table = _get_div_table_from_setup(setup, &div->width);
- if (IS_ERR(div->table)) {
- ret = PTR_ERR(div->table);
- kfree(div);
- return ERR_PTR(ret);
- }
-
-
- div->shift = setup->bit_shift;
- div->latch = -EINVAL;
-
- return &div->hw;
-}
-
-struct clk *ti_clk_register_divider(struct ti_clk *setup)
-{
- struct ti_clk_divider *div = setup->data;
- struct clk_omap_reg reg = {
- .index = div->module,
- .offset = div->reg,
- };
- u8 width;
- u32 flags = 0;
- u8 div_flags = 0;
- const struct clk_div_table *table;
- struct clk *clk;
-
- if (div->flags & CLKF_INDEX_STARTS_AT_ONE)
- div_flags |= CLK_DIVIDER_ONE_BASED;
-
- if (div->flags & CLKF_INDEX_POWER_OF_TWO)
- div_flags |= CLK_DIVIDER_POWER_OF_TWO;
-
- if (div->flags & CLKF_SET_RATE_PARENT)
- flags |= CLK_SET_RATE_PARENT;
-
- table = _get_div_table_from_setup(div, &width);
- if (IS_ERR(table))
- return (struct clk *)table;
-
- clk = _register_divider(NULL, setup->name, div->parent,
- flags, ®, div->bit_shift,
- width, -EINVAL, div_flags, table);
-
- if (IS_ERR(clk))
- kfree(table);
-
- return clk;
-}
-
-static struct clk_div_table *
-__init ti_clk_get_div_table(struct device_node *node)
+static int __init ti_clk_get_div_table(struct device_node *node,
+ struct clk_omap_divider *div)
{
struct clk_div_table *table;
const __be32 *divspec;
@@ -487,7 +405,7 @@
divspec = of_get_property(node, "ti,dividers", &num_div);
if (!divspec)
- return NULL;
+ return 0;
num_div /= 4;
@@ -501,14 +419,13 @@
}
if (!valid_div) {
- pr_err("no valid dividers for %s table\n", node->name);
- return ERR_PTR(-EINVAL);
+ pr_err("no valid dividers for %pOFn table\n", node);
+ return -EINVAL;
}
table = kcalloc(valid_div + 1, sizeof(*table), GFP_KERNEL);
-
if (!table)
- return ERR_PTR(-ENOMEM);
+ return -ENOMEM;
valid_div = 0;
@@ -521,96 +438,84 @@
}
}
- return table;
+ div->table = table;
+
+ return 0;
}
-static int _get_divider_width(struct device_node *node,
- const struct clk_div_table *table,
- u8 flags)
+static int _populate_divider_min_max(struct device_node *node,
+ struct clk_omap_divider *divider)
{
- u32 min_div;
- u32 max_div;
- u32 val = 0;
- u32 div;
+ u32 min_div = 0;
+ u32 max_div = 0;
+ u32 val;
+ const struct clk_div_table *clkt;
- if (!table) {
+ if (!divider->table) {
/* Clk divider table not provided, determine min/max divs */
if (of_property_read_u32(node, "ti,min-div", &min_div))
min_div = 1;
if (of_property_read_u32(node, "ti,max-div", &max_div)) {
- pr_err("no max-div for %s!\n", node->name);
+ pr_err("no max-div for %pOFn!\n", node);
return -EINVAL;
}
-
- /* Determine bit width for the field */
- if (flags & CLK_DIVIDER_ONE_BASED)
- val = 1;
-
- div = min_div;
-
- while (div < max_div) {
- if (flags & CLK_DIVIDER_POWER_OF_TWO)
- div <<= 1;
- else
- div++;
- val++;
- }
} else {
- div = 0;
- while (table[div].div) {
- val = table[div].val;
- div++;
+ for (clkt = divider->table; clkt->div; clkt++) {
+ val = clkt->div;
+ if (val > max_div)
+ max_div = val;
+ if (!min_div || val < min_div)
+ min_div = val;
}
}
- return fls(val);
+ divider->min = min_div;
+ divider->max = max_div;
+ _setup_mask(divider);
+
+ return 0;
}
static int __init ti_clk_divider_populate(struct device_node *node,
- struct clk_omap_reg *reg, const struct clk_div_table **table,
- u32 *flags, u8 *div_flags, u8 *width, u8 *shift, s8 *latch)
+ struct clk_omap_divider *div,
+ u32 *flags)
{
u32 val;
int ret;
- ret = ti_clk_get_reg_addr(node, 0, reg);
+ ret = ti_clk_get_reg_addr(node, 0, &div->reg);
if (ret)
return ret;
if (!of_property_read_u32(node, "ti,bit-shift", &val))
- *shift = val;
+ div->shift = val;
else
- *shift = 0;
+ div->shift = 0;
- if (latch) {
- if (!of_property_read_u32(node, "ti,latch-bit", &val))
- *latch = val;
- else
- *latch = -EINVAL;
- }
+ if (!of_property_read_u32(node, "ti,latch-bit", &val))
+ div->latch = val;
+ else
+ div->latch = -EINVAL;
*flags = 0;
- *div_flags = 0;
+ div->flags = 0;
if (of_property_read_bool(node, "ti,index-starts-at-one"))
- *div_flags |= CLK_DIVIDER_ONE_BASED;
+ div->flags |= CLK_DIVIDER_ONE_BASED;
if (of_property_read_bool(node, "ti,index-power-of-two"))
- *div_flags |= CLK_DIVIDER_POWER_OF_TWO;
+ div->flags |= CLK_DIVIDER_POWER_OF_TWO;
if (of_property_read_bool(node, "ti,set-rate-parent"))
*flags |= CLK_SET_RATE_PARENT;
- *table = ti_clk_get_div_table(node);
+ ret = ti_clk_get_div_table(node, div);
+ if (ret)
+ return ret;
- if (IS_ERR(*table))
- return PTR_ERR(*table);
-
- *width = _get_divider_width(node, *table, *div_flags);
-
- return 0;
+ return _populate_divider_min_max(node, div);
}
/**
@@ -622,24 +527,17 @@
static void __init of_ti_divider_clk_setup(struct device_node *node)
{
struct clk *clk;
- const char *parent_name;
- struct clk_omap_reg reg;
- u8 clk_divider_flags = 0;
- u8 width = 0;
- u8 shift = 0;
- s8 latch = -EINVAL;
- const struct clk_div_table *table = NULL;
u32 flags = 0;
+ struct clk_omap_divider *div;
- parent_name = of_clk_get_parent_name(node, 0);
+ div = kzalloc(sizeof(*div), GFP_KERNEL);
+ if (!div)
+ return;
- if (ti_clk_divider_populate(node, ®, &table, &flags,
- &clk_divider_flags, &width, &shift, &latch))
+ if (ti_clk_divider_populate(node, div, &flags))
goto cleanup;
- clk = _register_divider(NULL, node->name, parent_name, flags, ®,
- shift, width, latch, clk_divider_flags, table);
-
+ clk = _register_divider(node, flags, div);
if (!IS_ERR(clk)) {
of_clk_add_provider(node, of_clk_src_simple_get, clk);
of_ti_clk_autoidle_setup(node);
@@ -647,22 +545,21 @@
}
cleanup:
- kfree(table);
+ kfree(div->table);
+ kfree(div);
}
CLK_OF_DECLARE(divider_clk, "ti,divider-clock", of_ti_divider_clk_setup);
static void __init of_ti_composite_divider_clk_setup(struct device_node *node)
{
struct clk_omap_divider *div;
- u32 val;
+ u32 tmp;
div = kzalloc(sizeof(*div), GFP_KERNEL);
if (!div)
return;
- if (ti_clk_divider_populate(node, &div->reg, &div->table, &val,
- &div->flags, &div->width, &div->shift,
- NULL) < 0)
+ if (ti_clk_divider_populate(node, div, &tmp))
goto cleanup;
if (!ti_clk_add_component(node, &div->hw, CLK_COMPONENT_TYPE_DIVIDER))
--
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