forked from luck/tmp_suning_uos_patched
irqchip/mtk-sysirq: Extend intpol base to arbitrary number
Originally driver only supports one base. However, MT6797 has more than one bases to configure interrupt polarity. To support possible design change, here comes a solution to use arbitrary number of bases. Signed-off-by: Mars Cheng <mars.cheng@mediatek.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
This commit is contained in:
parent
d240fe0a40
commit
13683f9bb6
|
@ -24,22 +24,29 @@
|
|||
|
||||
struct mtk_sysirq_chip_data {
|
||||
spinlock_t lock;
|
||||
void __iomem *intpol_base;
|
||||
u32 nr_intpol_bases;
|
||||
void __iomem **intpol_bases;
|
||||
u32 *intpol_words;
|
||||
u8 *intpol_idx;
|
||||
u16 *which_word;
|
||||
};
|
||||
|
||||
static int mtk_sysirq_set_type(struct irq_data *data, unsigned int type)
|
||||
{
|
||||
irq_hw_number_t hwirq = data->hwirq;
|
||||
struct mtk_sysirq_chip_data *chip_data = data->chip_data;
|
||||
u8 intpol_idx = chip_data->intpol_idx[hwirq];
|
||||
void __iomem *base;
|
||||
u32 offset, reg_index, value;
|
||||
unsigned long flags;
|
||||
int ret;
|
||||
|
||||
base = chip_data->intpol_bases[intpol_idx];
|
||||
reg_index = chip_data->which_word[hwirq];
|
||||
offset = hwirq & 0x1f;
|
||||
reg_index = hwirq >> 5;
|
||||
|
||||
spin_lock_irqsave(&chip_data->lock, flags);
|
||||
value = readl_relaxed(chip_data->intpol_base + reg_index * 4);
|
||||
value = readl_relaxed(base + reg_index * 4);
|
||||
if (type == IRQ_TYPE_LEVEL_LOW || type == IRQ_TYPE_EDGE_FALLING) {
|
||||
if (type == IRQ_TYPE_LEVEL_LOW)
|
||||
type = IRQ_TYPE_LEVEL_HIGH;
|
||||
|
@ -49,7 +56,8 @@ static int mtk_sysirq_set_type(struct irq_data *data, unsigned int type)
|
|||
} else {
|
||||
value &= ~(1 << offset);
|
||||
}
|
||||
writel(value, chip_data->intpol_base + reg_index * 4);
|
||||
|
||||
writel(value, base + reg_index * 4);
|
||||
|
||||
data = data->parent_data;
|
||||
ret = data->chip->irq_set_type(data, type);
|
||||
|
@ -124,8 +132,7 @@ static int __init mtk_sysirq_of_init(struct device_node *node,
|
|||
{
|
||||
struct irq_domain *domain, *domain_parent;
|
||||
struct mtk_sysirq_chip_data *chip_data;
|
||||
int ret, size, intpol_num;
|
||||
struct resource res;
|
||||
int ret, size, intpol_num = 0, nr_intpol_bases = 0, i = 0;
|
||||
|
||||
domain_parent = irq_find_host(parent);
|
||||
if (!domain_parent) {
|
||||
|
@ -133,36 +140,103 @@ static int __init mtk_sysirq_of_init(struct device_node *node,
|
|||
return -EINVAL;
|
||||
}
|
||||
|
||||
ret = of_address_to_resource(node, 0, &res);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
chip_data = kzalloc(sizeof(*chip_data), GFP_KERNEL);
|
||||
if (!chip_data)
|
||||
return -ENOMEM;
|
||||
|
||||
size = resource_size(&res);
|
||||
intpol_num = size * 8;
|
||||
chip_data->intpol_base = ioremap(res.start, size);
|
||||
if (!chip_data->intpol_base) {
|
||||
pr_err("mtk_sysirq: unable to map sysirq register\n");
|
||||
ret = -ENXIO;
|
||||
goto out_free;
|
||||
while (of_get_address(node, i++, NULL, NULL))
|
||||
nr_intpol_bases++;
|
||||
|
||||
if (nr_intpol_bases == 0) {
|
||||
pr_err("mtk_sysirq: base address not specified\n");
|
||||
ret = -EINVAL;
|
||||
goto out_free_chip;
|
||||
}
|
||||
|
||||
chip_data->intpol_words = kcalloc(nr_intpol_bases,
|
||||
sizeof(*chip_data->intpol_words),
|
||||
GFP_KERNEL);
|
||||
if (!chip_data->intpol_words) {
|
||||
ret = -ENOMEM;
|
||||
goto out_free_chip;
|
||||
}
|
||||
|
||||
chip_data->intpol_bases = kcalloc(nr_intpol_bases,
|
||||
sizeof(*chip_data->intpol_bases),
|
||||
GFP_KERNEL);
|
||||
if (!chip_data->intpol_bases) {
|
||||
ret = -ENOMEM;
|
||||
goto out_free_intpol_words;
|
||||
}
|
||||
|
||||
for (i = 0; i < nr_intpol_bases; i++) {
|
||||
struct resource res;
|
||||
|
||||
ret = of_address_to_resource(node, i, &res);
|
||||
size = resource_size(&res);
|
||||
intpol_num += size * 8;
|
||||
chip_data->intpol_words[i] = size / 4;
|
||||
chip_data->intpol_bases[i] = of_iomap(node, i);
|
||||
if (ret || !chip_data->intpol_bases[i]) {
|
||||
pr_err("%s: couldn't map region %d\n",
|
||||
node->full_name, i);
|
||||
ret = -ENODEV;
|
||||
goto out_free_intpol;
|
||||
}
|
||||
}
|
||||
|
||||
chip_data->intpol_idx = kcalloc(intpol_num,
|
||||
sizeof(*chip_data->intpol_idx),
|
||||
GFP_KERNEL);
|
||||
if (!chip_data->intpol_idx) {
|
||||
ret = -ENOMEM;
|
||||
goto out_free_intpol;
|
||||
}
|
||||
|
||||
chip_data->which_word = kcalloc(intpol_num,
|
||||
sizeof(*chip_data->which_word),
|
||||
GFP_KERNEL);
|
||||
if (!chip_data->which_word) {
|
||||
ret = -ENOMEM;
|
||||
goto out_free_intpol_idx;
|
||||
}
|
||||
|
||||
/*
|
||||
* assign an index of the intpol_bases for each irq
|
||||
* to set it fast later
|
||||
*/
|
||||
for (i = 0; i < intpol_num ; i++) {
|
||||
u32 word = i / 32, j;
|
||||
|
||||
for (j = 0; word >= chip_data->intpol_words[j] ; j++)
|
||||
word -= chip_data->intpol_words[j];
|
||||
|
||||
chip_data->intpol_idx[i] = j;
|
||||
chip_data->which_word[i] = word;
|
||||
}
|
||||
|
||||
domain = irq_domain_add_hierarchy(domain_parent, 0, intpol_num, node,
|
||||
&sysirq_domain_ops, chip_data);
|
||||
if (!domain) {
|
||||
ret = -ENOMEM;
|
||||
goto out_unmap;
|
||||
goto out_free_which_word;
|
||||
}
|
||||
spin_lock_init(&chip_data->lock);
|
||||
|
||||
return 0;
|
||||
|
||||
out_unmap:
|
||||
iounmap(chip_data->intpol_base);
|
||||
out_free:
|
||||
out_free_which_word:
|
||||
kfree(chip_data->which_word);
|
||||
out_free_intpol_idx:
|
||||
kfree(chip_data->intpol_idx);
|
||||
out_free_intpol:
|
||||
for (i = 0; i < nr_intpol_bases; i++)
|
||||
if (chip_data->intpol_bases[i])
|
||||
iounmap(chip_data->intpol_bases[i]);
|
||||
kfree(chip_data->intpol_bases);
|
||||
out_free_intpol_words:
|
||||
kfree(chip_data->intpol_words);
|
||||
out_free_chip:
|
||||
kfree(chip_data);
|
||||
return ret;
|
||||
}
|
||||
|
|
Loading…
Reference in New Issue
Block a user