drivers/pinctrl/mediatek/mtk-eint.c | 830 +++++++++++++----- drivers/pinctrl/mediatek/mtk-eint.h | 75 +- .../pinctrl/mediatek/pinctrl-mtk-common-v2.c | 50 +- 3 files changed, 722 insertions(+), 233 deletions(-)
From: Chhao Chang <ot_chhao.chang@mediatek.com>
eint is divided from the original base address into base addresses
in five directions: east, south, west, north, and center.
Stores a limited number of eint numbers in each direction.
Signed-off-by: Chhao Chang <ot_chhao.chang@mediatek.com>
---
drivers/pinctrl/mediatek/mtk-eint.c | 830 +++++++++++++-----
drivers/pinctrl/mediatek/mtk-eint.h | 75 +-
.../pinctrl/mediatek/pinctrl-mtk-common-v2.c | 50 +-
3 files changed, 722 insertions(+), 233 deletions(-)
diff --git a/drivers/pinctrl/mediatek/mtk-eint.c b/drivers/pinctrl/mediatek/mtk-eint.c
index 27f0a54e12bf..afa53c7fce7f 100644
--- a/drivers/pinctrl/mediatek/mtk-eint.c
+++ b/drivers/pinctrl/mediatek/mtk-eint.c
@@ -17,16 +17,13 @@
#include <linux/irqdomain.h>
#include <linux/module.h>
#include <linux/of_irq.h>
+#include <linux/of_address.h>
#include <linux/platform_device.h>
#include "mtk-eint.h"
-#define MTK_EINT_EDGE_SENSITIVE 0
-#define MTK_EINT_LEVEL_SENSITIVE 1
-#define MTK_EINT_DBNC_SET_DBNC_BITS 4
-#define MTK_EINT_DBNC_MAX 16
-#define MTK_EINT_DBNC_RST_BIT (0x1 << 1)
-#define MTK_EINT_DBNC_SET_EN (0x1 << 0)
+static struct mtk_eint *global_eintc;
+struct mtk_eint_pin pin;
static const struct mtk_eint_regs mtk_generic_eint_regs = {
.stat = 0x000,
@@ -47,6 +44,10 @@ static const struct mtk_eint_regs mtk_generic_eint_regs = {
.dbnc_ctrl = 0x500,
.dbnc_set = 0x600,
.dbnc_clr = 0x700,
+ .event = 0x800,
+ .event_set = 0x840,
+ .event_clr = 0x880,
+ .raw_stat = 0xa00,
};
const unsigned int debounce_time_mt2701[] = {
@@ -64,60 +65,145 @@ const unsigned int debounce_time_mt6795[] = {
};
EXPORT_SYMBOL_GPL(debounce_time_mt6795);
-static void __iomem *mtk_eint_get_offset(struct mtk_eint *eint,
+/*
+ * Return the iomem of specific register ofset and decode the coordinate
+ * (instance, index) from global eint number.
+ * If return NULL, then it must be either out-of-range or do-not-support.
+ */
+static void __iomem *mtk_eint_get_ofset(struct mtk_eint *eint,
unsigned int eint_num,
- unsigned int offset)
+ unsigned int ofset,
+ unsigned int *instance,
+ unsigned int *index)
{
- unsigned int eint_base = 0;
void __iomem *reg;
- if (eint_num >= eint->hw->ap_num)
- eint_base = eint->hw->ap_num;
+ if (eint_num >= eint->total_pin_number ||
+ !eint->pins[eint_num].enabled) {
+ WARN_ON(1);
+ return NULL;
+ }
- reg = eint->base + offset + ((eint_num - eint_base) / 32) * 4;
+ *instance = eint->pins[eint_num].instance;
+ *index = eint->pins[eint_num].index;
+ reg = eint->instances[*instance].base + ofset + (*index / MAX_BIT * REG_OFSET);
return reg;
}
+/*
+ * Generate helper function to access property register of a dedicate pin.
+ */
+#define DEFINE_EINT_GET_FUNCTION(_NAME, _OFSET) \
+static unsigned int mtk_eint_get_##_NAME(struct mtk_eint *eint, \
+ unsigned int eint_num) \
+{ \
+ unsigned int instance, index; \
+ void __iomem *reg = mtk_eint_get_ofset(eint, eint_num, \
+ _OFSET, \
+ &instance, &index); \
+ unsigned int bit = BIT(index & 0x1f);\
+\
+ if (!reg) { \
+ dev_err(eint->dev, "%s invalid eint_num %d\n", \
+ __func__, eint_num); \
+ return 0;\
+ } \
+\
+ return !!(readl(reg) & bit); \
+}
+
+DEFINE_EINT_GET_FUNCTION(stat, eint->comp->regs->stat);
+DEFINE_EINT_GET_FUNCTION(mask, eint->comp->regs->mask);
+DEFINE_EINT_GET_FUNCTION(sens, eint->comp->regs->sens);
+DEFINE_EINT_GET_FUNCTION(pol, eint->comp->regs->pol);
+DEFINE_EINT_GET_FUNCTION(dom_en, eint->comp->regs->dom_en);
+DEFINE_EINT_GET_FUNCTION(event, eint->comp->regs->event);
+DEFINE_EINT_GET_FUNCTION(raw_stat, eint->comp->regs->raw_stat);
+
+int dump_eint_pin_status(unsigned int eint_num)
+{
+ unsigned int stat, raw_stat, mask, sens, pol, dom_en, event;
+
+ if (eint_num < 0 || eint_num > global_eintc->total_pin_number)
+ return ENODEV;
+
+ stat = mtk_eint_get_stat(global_eintc, eint_num);
+ raw_stat = mtk_eint_get_raw_stat(global_eintc, eint_num);
+ mask = mtk_eint_get_mask(global_eintc, eint_num);
+ sens = mtk_eint_get_sens(global_eintc, eint_num);
+ pol = mtk_eint_get_pol(global_eintc, eint_num);
+ dom_en = mtk_eint_get_dom_en(global_eintc, eint_num);
+ event = mtk_eint_get_event(global_eintc, eint_num);
+ dev_info(global_eintc->dev, "%s eint_num:%u=stat:%u,raw:%u, \
+ mask:%u, sens:%u,pol:%u,dom_en:%u,event:%u\n",
+ __func__, eint_num, stat, raw_stat, mask, sens,
+ pol, dom_en, event);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(dump_eint_pin_status);
+
static unsigned int mtk_eint_can_en_debounce(struct mtk_eint *eint,
unsigned int eint_num)
{
unsigned int sens;
- unsigned int bit = BIT(eint_num % 32);
- void __iomem *reg = mtk_eint_get_offset(eint, eint_num,
- eint->regs->sens);
+ unsigned int instance, index;
+ void __iomem *reg = mtk_eint_get_ofset(eint, eint_num,
+ eint->comp->regs->sens,
+ &instance, &index);
+ unsigned int bit = BIT(index & 0x1f);
+
+ if (!reg) {
+ dev_err(eint->dev, "%s invalid eint_num %d\n",
+ __func__, eint_num);
+ return 0;
+ }
if (readl(reg) & bit)
sens = MTK_EINT_LEVEL_SENSITIVE;
else
sens = MTK_EINT_EDGE_SENSITIVE;
- if (eint_num < eint->hw->db_cnt && sens != MTK_EINT_EDGE_SENSITIVE)
+ if (eint->pins[eint_num].debounce &&
+ sens != MTK_EINT_EDGE_SENSITIVE)
return 1;
else
return 0;
}
-static int mtk_eint_flip_edge(struct mtk_eint *eint, int hwirq)
+static int mtk_eint_flip_edge(struct mtk_eint *eint, int eint_num)
{
int start_level, curr_level;
- unsigned int reg_offset;
- u32 mask = BIT(hwirq & 0x1f);
- u32 port = (hwirq >> 5) & eint->hw->port_mask;
- void __iomem *reg = eint->base + (port << 2);
+ unsigned int reg_ofset;
+ unsigned int instance, index, mask, port;
+ void __iomem *reg;
- curr_level = eint->gpio_xlate->get_gpio_state(eint->pctl, hwirq);
+ reg = mtk_eint_get_ofset(eint, eint_num, MTK_EINT_NO_OFSET,
+ &instance, &index);
+
+ if (!reg) {
+ dev_err(eint->dev, "%s invalid eint_num %d\n",
+ __func__, eint_num);
+ return 0;
+ }
+
+ mask = BIT(index & 0x1f);
+ port = index >> REG_GROUP;
+ reg = eint->instances[instance].base + port * REG_OFSET;
+
+ curr_level = eint->gpio_xlate->get_gpio_state(eint->pctl, eint_num);
do {
start_level = curr_level;
if (start_level)
- reg_offset = eint->regs->pol_clr;
+ reg_ofset = eint->comp->regs->pol_clr;
else
- reg_offset = eint->regs->pol_set;
- writel(mask, reg + reg_offset);
+ reg_ofset = eint->comp->regs->pol_set;
+
+ writel(mask, reg + reg_ofset);
curr_level = eint->gpio_xlate->get_gpio_state(eint->pctl,
- hwirq);
+ eint_num);
} while (start_level != curr_level);
return start_level;
@@ -126,11 +212,19 @@ static int mtk_eint_flip_edge(struct mtk_eint *eint, int hwirq)
static void mtk_eint_mask(struct irq_data *d)
{
struct mtk_eint *eint = irq_data_get_irq_chip_data(d);
- u32 mask = BIT(d->hwirq & 0x1f);
- void __iomem *reg = mtk_eint_get_offset(eint, d->hwirq,
- eint->regs->mask_set);
+ unsigned int instance, index;
+ void __iomem *reg = mtk_eint_get_ofset(eint, d->hwirq,
+ eint->comp->regs->mask_set,
+ &instance, &index);
+ u32 mask = BIT(index & 0x1f);
+
+ if (!reg) {
+ dev_err(eint->dev, "%s invalid eint_num %lu\n",
+ __func__, d->hwirq);
+ return;
+ }
- eint->cur_mask[d->hwirq >> 5] &= ~mask;
+ eint->instances[instance].cur_mask[index >> REG_GROUP] &= ~mask;
writel(mask, reg);
}
@@ -138,43 +232,91 @@ static void mtk_eint_mask(struct irq_data *d)
static void mtk_eint_unmask(struct irq_data *d)
{
struct mtk_eint *eint = irq_data_get_irq_chip_data(d);
- u32 mask = BIT(d->hwirq & 0x1f);
- void __iomem *reg = mtk_eint_get_offset(eint, d->hwirq,
- eint->regs->mask_clr);
+ unsigned int instance, index;
+ void __iomem *reg = mtk_eint_get_ofset(eint, d->hwirq,
+ eint->comp->regs->mask_clr,
+ &instance, &index);
+ u32 mask = BIT(index & 0x1f);
+
+ if (!reg) {
+ dev_err(eint->dev, "%s invalid eint_num %lu\n",
+ __func__, d->hwirq);
+ return;
+ }
- eint->cur_mask[d->hwirq >> 5] |= mask;
+ eint->instances[instance].cur_mask[index >> REG_GROUP] |= mask;
writel(mask, reg);
- if (eint->dual_edge[d->hwirq])
+ if (eint->pins[d->hwirq].dual_edge)
mtk_eint_flip_edge(eint, d->hwirq);
}
-static unsigned int mtk_eint_get_mask(struct mtk_eint *eint,
+static void mtk_eint_ack(struct irq_data *d)
+{
+ struct mtk_eint *eint = irq_data_get_irq_chip_data(d);
+ unsigned int instance, index;
+ void __iomem *reg;
+ unsigned int bit;
+
+ if (eint->comp->ops.ack)
+ eint->comp->ops.ack(d);
+ else {
+ reg = mtk_eint_get_ofset(eint, d->hwirq,
+ eint->comp->regs->ack,
+ &instance, &index);
+ bit = BIT(index & 0x1f);
+ if (!reg) {
+ dev_err(eint->dev, "%s invalid eint_num %lu\n",
+ __func__, d->hwirq);
+ return;
+ }
+
+ writel(bit, reg);
+ }
+}
+
+static void mtk_eint_soft_set(struct mtk_eint *eint,
unsigned int eint_num)
{
- unsigned int bit = BIT(eint_num % 32);
- void __iomem *reg = mtk_eint_get_offset(eint, eint_num,
- eint->regs->mask);
+ unsigned int instance, index;
+ void __iomem *reg = mtk_eint_get_ofset(eint, eint_num,
+ eint->comp->regs->soft_set,
+ &instance, &index);
+ unsigned int bit = BIT(index & 0x1f);
+
+ if (!reg) {
+ dev_err(eint->dev, "%s invalid eint_num %d\n",
+ __func__, eint_num);
+ return;
+ }
- return !!(readl(reg) & bit);
+ writel(bit, reg);
}
-static void mtk_eint_ack(struct irq_data *d)
+static void mtk_eint_soft_clr(struct mtk_eint *eint,
+ unsigned int eint_num)
{
- struct mtk_eint *eint = irq_data_get_irq_chip_data(d);
- u32 mask = BIT(d->hwirq & 0x1f);
- void __iomem *reg = mtk_eint_get_offset(eint, d->hwirq,
- eint->regs->ack);
+ unsigned int instance, index;
+ void __iomem *reg = mtk_eint_get_ofset(eint, eint_num,
+ eint->comp->regs->soft_clr,
+ &instance, &index);
+ unsigned int bit = BIT(index & 0x1f);
+
+ if (!reg) {
+ dev_err(eint->dev, "%s invalid eint_num %d\n",
+ __func__, eint_num);
+ return;
+ }
- writel(mask, reg);
+ writel(bit, reg);
}
static int mtk_eint_set_type(struct irq_data *d, unsigned int type)
{
struct mtk_eint *eint = irq_data_get_irq_chip_data(d);
- bool masked;
- u32 mask = BIT(d->hwirq & 0x1f);
+ u32 mask;
+ unsigned int instance, index;
void __iomem *reg;
if (((type & IRQ_TYPE_EDGE_BOTH) && (type & IRQ_TYPE_LEVEL_MASK)) ||
@@ -186,36 +328,42 @@ static int mtk_eint_set_type(struct irq_data *d, unsigned int type)
}
if ((type & IRQ_TYPE_EDGE_BOTH) == IRQ_TYPE_EDGE_BOTH)
- eint->dual_edge[d->hwirq] = 1;
+ eint->pins[d->hwirq].dual_edge = 1;
else
- eint->dual_edge[d->hwirq] = 0;
+ eint->pins[d->hwirq].dual_edge = 0;
- if (!mtk_eint_get_mask(eint, d->hwirq)) {
- mtk_eint_mask(d);
- masked = false;
- } else {
- masked = true;
- }
+ if (type & (IRQ_TYPE_LEVEL_LOW | IRQ_TYPE_EDGE_FALLING))
+ reg = mtk_eint_get_ofset(eint, d->hwirq,
+ eint->comp->regs->pol_clr,
+ &instance, &index);
+ else
+ reg = mtk_eint_get_ofset(eint, d->hwirq,
+ eint->comp->regs->pol_set,
+ &instance, &index);
- if (type & (IRQ_TYPE_LEVEL_LOW | IRQ_TYPE_EDGE_FALLING)) {
- reg = mtk_eint_get_offset(eint, d->hwirq, eint->regs->pol_clr);
- writel(mask, reg);
- } else {
- reg = mtk_eint_get_offset(eint, d->hwirq, eint->regs->pol_set);
- writel(mask, reg);
- }
+ mask = BIT(index & 0x1f);
+ writel(mask, reg);
+
+ if (type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING))
+ reg = mtk_eint_get_ofset(eint, d->hwirq,
+ eint->comp->regs->sens_clr,
+ &instance, &index);
+ else
+ reg = mtk_eint_get_ofset(eint, d->hwirq,
+ eint->comp->regs->sens_set,
+ &instance, &index);
- if (type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING)) {
- reg = mtk_eint_get_offset(eint, d->hwirq, eint->regs->sens_clr);
- writel(mask, reg);
- } else {
- reg = mtk_eint_get_offset(eint, d->hwirq, eint->regs->sens_set);
- writel(mask, reg);
+ if (!reg) {
+ dev_err(eint->dev, "%s invalid eint_num %lu\n",
+ __func__, d->hwirq);
+ return 0;
}
- mtk_eint_ack(d);
- if (!masked)
- mtk_eint_unmask(d);
+ mask = BIT(index & 0x1f);
+ writel(mask, reg);
+
+ if (eint->pins[d->hwirq].dual_edge)
+ mtk_eint_flip_edge(eint, d->hwirq);
return 0;
}
@@ -223,30 +371,28 @@ static int mtk_eint_set_type(struct irq_data *d, unsigned int type)
static int mtk_eint_irq_set_wake(struct irq_data *d, unsigned int on)
{
struct mtk_eint *eint = irq_data_get_irq_chip_data(d);
- int shift = d->hwirq & 0x1f;
- int reg = d->hwirq >> 5;
+ unsigned int instance, index, shift, port;
+ void __iomem *reg = mtk_eint_get_ofset(eint, d->hwirq,
+ MTK_EINT_NO_OFSET,
+ &instance, &index);
+
+ if (!reg) {
+ dev_err(eint->dev, "%s invalid eint_num %lu\n",
+ __func__, d->hwirq);
+ return 0;
+ }
+
+ shift = index & 0x1f;
+ port = index >> REG_GROUP;
if (on)
- eint->wake_mask[reg] |= BIT(shift);
+ eint->instances[instance].wake_mask[port] |= BIT(shift);
else
- eint->wake_mask[reg] &= ~BIT(shift);
+ eint->instances[instance].wake_mask[port] &= ~BIT(shift);
return 0;
}
-static void mtk_eint_chip_write_mask(const struct mtk_eint *eint,
- void __iomem *base, u32 *buf)
-{
- int port;
- void __iomem *reg;
-
- for (port = 0; port < eint->hw->ports; port++) {
- reg = base + (port << 2);
- writel_relaxed(~buf[port], reg + eint->regs->mask_set);
- writel_relaxed(buf[port], reg + eint->regs->mask_clr);
- }
-}
-
static int mtk_eint_irq_request_resources(struct irq_data *d)
{
struct mtk_eint *eint = irq_data_get_irq_chip_data(d);
@@ -290,7 +436,7 @@ static void mtk_eint_irq_release_resources(struct irq_data *d)
}
static struct irq_chip mtk_eint_irq_chip = {
- .name = "mt-eint",
+ .name = "mtk-eint",
.irq_disable = mtk_eint_mask,
.irq_mask = mtk_eint_mask,
.irq_unmask = mtk_eint_unmask,
@@ -301,35 +447,51 @@ static struct irq_chip mtk_eint_irq_chip = {
.irq_release_resources = mtk_eint_irq_release_resources,
};
+/*
+ * Configure all EINT pins as domain 0, which only belongs to AP.
+ */
static unsigned int mtk_eint_hw_init(struct mtk_eint *eint)
{
- void __iomem *dom_en = eint->base + eint->regs->dom_en;
- void __iomem *mask_set = eint->base + eint->regs->mask_set;
- unsigned int i;
-
- for (i = 0; i < eint->hw->ap_num; i += 32) {
- writel(0xffffffff, dom_en);
- writel(0xffffffff, mask_set);
- dom_en += 4;
- mask_set += 4;
+ void __iomem *reg,*eevt_clr;
+ unsigned int i, j;
+
+ for (i = 0; i < eint->instance_number; i++) {
+ reg = eint->instances[i].base + eint->comp->regs->dom_en;
+ eevt_clr = eint->instances[i].base + eint->comp->regs->event_clr;
+ for (j = 0; j < eint->instances[i].number; j += MAX_BIT, reg += REG_OFSET, eevt_clr += REG_OFSET) {
+ writel(REG_VAL, reg);
+ writel(REG_VAL, eevt_clr);
+ }
}
return 0;
}
static inline void
-mtk_eint_debounce_process(struct mtk_eint *eint, int index)
+mtk_eint_debounce_process(struct mtk_eint *eint, int eint_num)
{
- unsigned int rst, ctrl_offset;
+ unsigned int rst, ctrl_ofset;
unsigned int bit, dbnc;
+ unsigned int instance, index;
+ void __iomem *reg;
+
+ reg = mtk_eint_get_ofset(eint, eint_num, MTK_EINT_NO_OFSET,
+ &instance, &index);
+
+ if (!reg) {
+ dev_err(eint->dev, "%s invalid eint_num %d\n",
+ __func__, eint_num);
+ return;
+ }
+
+ ctrl_ofset = (index / REG_OFSET) * REG_OFSET + eint->comp->regs->dbnc_ctrl;
+ dbnc = readl(eint->instances[instance].base + ctrl_ofset);
+ bit = MTK_EINT_DBNC_SET_EN << ((index % REG_OFSET) * DB_GROUP);
- ctrl_offset = (index / 4) * 4 + eint->regs->dbnc_ctrl;
- dbnc = readl(eint->base + ctrl_offset);
- bit = MTK_EINT_DBNC_SET_EN << ((index % 4) * 8);
if ((bit & dbnc) > 0) {
- ctrl_offset = (index / 4) * 4 + eint->regs->dbnc_set;
- rst = MTK_EINT_DBNC_RST_BIT << ((index % 4) * 8);
- writel(rst, eint->base + ctrl_offset);
+ ctrl_ofset = (index / REG_OFSET) * REG_OFSET + eint->comp->regs->dbnc_set;
+ rst = MTK_EINT_DBNC_RST_BIT << ((index % REG_OFSET) * DB_GROUP);
+ writel(rst, eint->instances[instance].base + ctrl_ofset);
}
}
@@ -337,65 +499,72 @@ static void mtk_eint_irq_handler(struct irq_desc *desc)
{
struct irq_chip *chip = irq_desc_get_chip(desc);
struct mtk_eint *eint = irq_desc_get_handler_data(desc);
- unsigned int status, eint_num;
- int offset, mask_offset, index;
- void __iomem *reg = mtk_eint_get_offset(eint, 0, eint->regs->stat);
- int dual_edge, start_level, curr_level;
+ unsigned int status, i, j;
+ int shift, port, eint_num, virq;
+ unsigned int dual_edge, start_level, curr_level;
+ struct mtk_eint_instance eint_instance;
+ void __iomem *addr;
chained_irq_enter(chip, desc);
- for (eint_num = 0; eint_num < eint->hw->ap_num; eint_num += 32,
- reg += 4) {
- status = readl(reg);
- while (status) {
- offset = __ffs(status);
- mask_offset = eint_num >> 5;
- index = eint_num + offset;
- status &= ~BIT(offset);
-
- /*
- * If we get an interrupt on pin that was only required
- * for wake (but no real interrupt requested), mask the
- * interrupt (as would mtk_eint_resume do anyway later
- * in the resume sequence).
- */
- if (eint->wake_mask[mask_offset] & BIT(offset) &&
- !(eint->cur_mask[mask_offset] & BIT(offset))) {
- writel_relaxed(BIT(offset), reg -
- eint->regs->stat +
- eint->regs->mask_set);
- }
-
- dual_edge = eint->dual_edge[index];
- if (dual_edge) {
- /*
- * Clear soft-irq in case we raised it last
- * time.
- */
- writel(BIT(offset), reg - eint->regs->stat +
- eint->regs->soft_clr);
- start_level =
- eint->gpio_xlate->get_gpio_state(eint->pctl,
- index);
- }
+ for (i = 0; i < eint->instance_number; i++) {
+ eint_instance = eint->instances[i];
- generic_handle_domain_irq(eint->domain, index);
+ /* Iterate all pins by port */
+ for (j = 0; j < eint_instance.number; j += MAX_BIT) {
+ port = j >> REG_GROUP;
+ status = readl(eint_instance.base + port * REG_OFSET +
+ eint->comp->regs->stat);
+ while (status) {
+ shift = __ffs(status);
+ status &= ~BIT(shift);
- if (dual_edge) {
- curr_level = mtk_eint_flip_edge(eint, index);
+ eint_num = eint->instances[i].pin_list[shift + j];
+ virq = irq_find_mapping(eint->domain, eint_num);
/*
- * If level changed, we might lost one edge
- * interrupt, raised it through soft-irq.
+ * If we get an interrupt on pin that was only required
+ * for wake (but no real interrupt requested), mask the
+ * interrupt (as would mtk_eint_resume do anyway later
+ * in the resume sequence).
*/
- if (start_level != curr_level)
- writel(BIT(offset), reg -
- eint->regs->stat +
- eint->regs->soft_set);
- }
+ if (eint->instances[i].wake_mask[port] & BIT(shift) &&
+ !(eint->instances[i].cur_mask[port] & BIT(shift))) {
+ addr = eint_instance.base + port * REG_OFSET +
+ eint->comp->regs->mask_set;
+ writel_relaxed(BIT(shift), addr);
+ }
+
+ dual_edge = eint->pins[eint_num].dual_edge;
+ if (dual_edge) {
+ /*
+ * Clear soft-irq in case we raised it last
+ * time.
+ */
+ mtk_eint_soft_clr(eint, eint_num);
+
+ start_level =
+ eint->gpio_xlate->get_gpio_state(eint->pctl,
+ eint_num);
+ }
+
+ generic_handle_irq(virq);
+
+ if (dual_edge) {
+ curr_level = mtk_eint_flip_edge(eint, eint_num);
+
+ /*
+ * If level changed, we might lost one edge
+ * interrupt, raised it through soft-irq.
+ */
+ if (start_level != curr_level)
+ mtk_eint_soft_set(eint, eint_num);
+ }
+
+ if (eint->pins[eint_num].debounce)
+ mtk_eint_debounce_process(eint, eint_num);
- if (index < eint->hw->db_cnt)
- mtk_eint_debounce_process(eint, index);
+ }
}
}
chained_irq_exit(chip, desc);
@@ -403,7 +572,20 @@ static void mtk_eint_irq_handler(struct irq_desc *desc)
int mtk_eint_do_suspend(struct mtk_eint *eint)
{
- mtk_eint_chip_write_mask(eint, eint->base, eint->wake_mask);
+ unsigned int i, j, port;
+
+ for (i = 0; i < eint->instance_number; i++) {
+ struct mtk_eint_instance inst = eint->instances[i];
+
+ for (j = 0; j < inst.number; j += MAX_BIT) {
+ port = j >> REG_GROUP;
+ writel_relaxed(~inst.wake_mask[port],
+ inst.base + port*REG_OFSET + eint->comp->regs->mask_set);
+ writel_relaxed(inst.wake_mask[port],
+ inst.base + port*REG_OFSET + eint->comp->regs->mask_clr);
+ }
+ }
+ dsb(sy);
return 0;
}
@@ -411,7 +593,20 @@ EXPORT_SYMBOL_GPL(mtk_eint_do_suspend);
int mtk_eint_do_resume(struct mtk_eint *eint)
{
- mtk_eint_chip_write_mask(eint, eint->base, eint->cur_mask);
+ unsigned int i, j, port;
+
+ for (i = 0; i < eint->instance_number; i++) {
+ struct mtk_eint_instance inst = eint->instances[i];
+
+ for (j = 0; j < inst.number; j += MAX_BIT) {
+ port = j >> REG_GROUP;
+ writel_relaxed(~inst.cur_mask[port],
+ inst.base + port*REG_OFSET + eint->comp->regs->mask_set);
+ writel_relaxed(inst.cur_mask[port],
+ inst.base + port*REG_OFSET + eint->comp->regs->mask_clr);
+ }
+ }
+ dsb(sy);
return 0;
}
@@ -420,27 +615,45 @@ EXPORT_SYMBOL_GPL(mtk_eint_do_resume);
int mtk_eint_set_debounce(struct mtk_eint *eint, unsigned long eint_num,
unsigned int debounce)
{
- int virq, eint_offset;
- unsigned int set_offset, bit, clr_bit, clr_offset, rst, i, unmask,
+ int virq, eint_ofset;
+ unsigned int set_ofset, bit, clr_bit, clr_ofset, rst, i, unmask,
dbnc;
+ static const unsigned int debounce_time[] = { 156, 313, 625, 1250,
+ 20000, 40000, 80000, 160000, 320000, 640000 };
struct irq_data *d;
+ unsigned int instance, index;
+ void __iomem *reg;
- if (!eint->hw->db_time)
- return -EOPNOTSUPP;
+ /*
+ * Due to different number of bit field, we only decode
+ * the coordinate here, instead of get the VA.
+ */
+ reg = mtk_eint_get_ofset(eint, eint_num, MTK_EINT_NO_OFSET,
+ &instance, &index);
+
+ if (!reg) {
+ dev_err(eint->dev, "%s invalid eint_num %lu\n",
+ __func__, eint_num);
+ return 0;
+ }
virq = irq_find_mapping(eint->domain, eint_num);
- eint_offset = (eint_num % 4) * 8;
+ eint_ofset = (index % REG_OFSET) * DB_GROUP;
d = irq_get_irq_data(virq);
- set_offset = (eint_num / 4) * 4 + eint->regs->dbnc_set;
- clr_offset = (eint_num / 4) * 4 + eint->regs->dbnc_clr;
+ reg = eint->instances[instance].base;
+ set_ofset = (index / REG_OFSET) * REG_OFSET + eint->comp->regs->dbnc_set;
+ clr_ofset = (index / REG_OFSET) * REG_OFSET + eint->comp->regs->dbnc_clr;
if (!mtk_eint_can_en_debounce(eint, eint_num))
return -EINVAL;
- dbnc = eint->num_db_time;
- for (i = 0; i < eint->num_db_time; i++) {
- if (debounce <= eint->hw->db_time[i]) {
+ /*
+ * Check eint number to avoid access out-of-range
+ */
+ dbnc = ARRAY_SIZE(debounce_time) - 1;
+ for (i = 0; i < ARRAY_SIZE(debounce_time); i++) {
+ if (debounce <= debounce_time[i]) {
dbnc = i;
break;
}
@@ -449,23 +662,20 @@ int mtk_eint_set_debounce(struct mtk_eint *eint, unsigned long eint_num,
if (!mtk_eint_get_mask(eint, eint_num)) {
mtk_eint_mask(d);
unmask = 1;
- } else {
+ } else
unmask = 0;
- }
- clr_bit = 0xff << eint_offset;
- writel(clr_bit, eint->base + clr_offset);
+ clr_bit = 0xff << eint_ofset;
+ writel(clr_bit, reg + clr_ofset);
- bit = ((dbnc << MTK_EINT_DBNC_SET_DBNC_BITS) | MTK_EINT_DBNC_SET_EN) <<
- eint_offset;
- rst = MTK_EINT_DBNC_RST_BIT << eint_offset;
- writel(rst | bit, eint->base + set_offset);
+ bit = ((dbnc << MTK_EINT_DBNC_SET_DBNC_BITS)
+ | MTK_EINT_DBNC_SET_EN) << eint_ofset;
+ rst = MTK_EINT_DBNC_RST_BIT << eint_ofset;
+ writel(rst | bit, reg + set_ofset);
/*
- * Delay a while (more than 2T) to wait for hw debounce counter reset
- * work correctly.
+ * Delay should be (8T @ 32k) from dbc rst to work correctly.
*/
- udelay(1);
if (unmask == 1)
mtk_eint_unmask(d);
@@ -473,6 +683,53 @@ int mtk_eint_set_debounce(struct mtk_eint *eint, unsigned long eint_num,
}
EXPORT_SYMBOL_GPL(mtk_eint_set_debounce);
+unsigned int mtk_eint_get_debounce_en(struct mtk_eint *eint,
+ unsigned int eint_num)
+{
+ unsigned int instance, index, bit;
+ void __iomem *reg;
+
+ reg = mtk_eint_get_ofset(eint, eint_num, MTK_EINT_NO_OFSET,
+ &instance, &index);
+
+ if (!reg) {
+ dev_err(eint->dev, "%s invalid eint_num %d\n",
+ __func__, eint_num);
+ return 0;
+ }
+
+ reg = eint->instances[instance].base +
+ (index / REG_OFSET) * REG_OFSET + eint->comp->regs->dbnc_ctrl;
+
+ bit = MTK_EINT_DBNC_SET_EN << ((index % REG_OFSET) * DB_GROUP);
+
+ return (readl(reg) & bit) ? 1 : 0;
+}
+
+unsigned int mtk_eint_get_debounce_value(struct mtk_eint *eint,
+ unsigned int eint_num)
+{
+ unsigned int instance, index, mask, ofset;
+ void __iomem *reg;
+
+ reg = mtk_eint_get_ofset(eint, eint_num, MTK_EINT_NO_OFSET,
+ &instance, &index);
+
+ if (!reg) {
+ dev_err(eint->dev, "%s invalid eint_num %d\n",
+ __func__, eint_num);
+ return 0;
+ }
+
+ reg = eint->instances[instance].base +
+ (index / REG_OFSET) * REG_OFSET + eint->comp->regs->dbnc_ctrl;
+
+ ofset = MTK_EINT_DBNC_SET_DBNC_BITS + ((index % REG_OFSET) * DB_GROUP);
+ mask = 0xf << ofset;
+
+ return ((readl(reg) & mask) >> ofset);
+}
+
int mtk_eint_find_irq(struct mtk_eint *eint, unsigned long eint_n)
{
int irq;
@@ -485,45 +742,208 @@ int mtk_eint_find_irq(struct mtk_eint *eint, unsigned long eint_n)
}
EXPORT_SYMBOL_GPL(mtk_eint_find_irq);
+static const struct mtk_eint_compatible default_compat = {
+ .regs = &mtk_generic_eint_regs,
+};
+
+static const struct of_device_id eint_compatible_ids[] = {
+ { }
+};
+
int mtk_eint_do_init(struct mtk_eint *eint)
{
- int i;
+ int i, virq;
+ unsigned int size;
+ eint->instance_number = 1;
+
+ for (i = 0; i < eint->total_pin_number; i++) {
+ eint->pins[i].enabled = true;
+ eint->pins[i].instance = 0;
+ eint->pins[i].index = i;
+ eint->pins[i].debounce = (i < eint->hw->db_cnt) ? 1 : 0;
+
+ eint->instances[i].pin_list[i] = i;
+ eint->instances[i].number++;
+ }
- /* If clients don't assign a specific regs, let's use generic one */
- if (!eint->regs)
- eint->regs = &mtk_generic_eint_regs;
+ for (i = 0; i < eint->instance_number; i++) {
+ size = (eint->instances[i].number / MAX_BIT + 1) * sizeof(unsigned int);
+ eint->instances[i].wake_mask =
+ devm_kzalloc(eint->dev, size, GFP_KERNEL);
+ eint->instances[i].cur_mask =
+ devm_kzalloc(eint->dev, size, GFP_KERNEL);
- eint->wake_mask = devm_kcalloc(eint->dev, eint->hw->ports,
- sizeof(*eint->wake_mask), GFP_KERNEL);
- if (!eint->wake_mask)
+ if (!eint->instances[i].wake_mask ||
+ !eint->instances[i].cur_mask)
+ return -ENOMEM;
+ }
+
+ eint->comp = &default_compat;
+
+ eint->domain = irq_domain_add_linear(eint->dev->of_node,
+ eint->total_pin_number,
+ &irq_domain_simple_ops, NULL);
+ if (!eint->domain)
return -ENOMEM;
- eint->cur_mask = devm_kcalloc(eint->dev, eint->hw->ports,
- sizeof(*eint->cur_mask), GFP_KERNEL);
- if (!eint->cur_mask)
+ mtk_eint_hw_init(eint);
+ for (i = 0; i < eint->total_pin_number; i++) {
+ virq = irq_create_mapping(eint->domain, i);
+
+ irq_set_chip_and_handler(virq, &mtk_eint_irq_chip,
+ handle_level_irq);
+ irq_set_chip_data(virq, eint);
+ }
+
+ irq_set_chained_handler_and_data(eint->irq, mtk_eint_irq_handler,
+ eint);
+
+ global_eintc = eint;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(mtk_eint_do_init);
+
+int mtk_eint_do_init_v2(struct mtk_eint *eint)
+{
+ int i, virq, matrix_number = 0;
+ struct device_node *node;
+ unsigned int ret, size, ofset;
+ unsigned int id, inst, idx, support_deb;
+
+ const phandle *ph;
+
+ ph = of_get_property(eint->dev->of_node, "mediatek,eint", NULL);
+ if (!ph) {
+ dev_err(eint->dev, "Cannot find EINT phandle in PIO node.\n");
+ return -ENODEV;
+ }
+
+ node = of_find_node_by_phandle(be32_to_cpup(ph));
+ if (!node) {
+ dev_err(eint->dev, "Cannot find EINT node by phandle.\n");
+ return -ENODEV;
+ }
+
+ ret = of_property_read_u32(node, "mediatek,total-pin-number",
+ &eint->total_pin_number);
+ if (ret) {
+ dev_err(eint->dev,
+ "%s cannot read total-pin-number from device node.\n",
+ __func__);
+ return -EINVAL;
+ }
+
+ dev_info(eint->dev, "%s eint total %u pins.\n", __func__,
+ eint->total_pin_number);
+
+ ret = of_property_read_u32(node, "mediatek,instance-num",
+ &eint->instance_number);
+ if (ret)
+ eint->instance_number = 1; // only 1 instance in legacy chip
+
+ size = eint->instance_number * sizeof(struct mtk_eint_instance);
+ eint->instances = devm_kzalloc(eint->dev, size, GFP_KERNEL);
+ if (!eint->instances)
return -ENOMEM;
- eint->dual_edge = devm_kcalloc(eint->dev, eint->hw->ap_num,
- sizeof(int), GFP_KERNEL);
- if (!eint->dual_edge)
+ size = eint->total_pin_number * sizeof(struct mtk_eint_pin);
+ eint->pins = devm_kzalloc(eint->dev, size, GFP_KERNEL);
+ if (!eint->pins)
return -ENOMEM;
+ for (i = 0; i < eint->instance_number; i++) {
+ ret = of_property_read_string_index(node, "reg-name", i,
+ &(eint->instances[i].name));
+ if (ret) {
+ dev_info(eint->dev,
+ "%s cannot read the name of instance %d.\n",
+ __func__, i);
+ }
+
+ eint->instances[i].base = of_iomap(node, i);
+ if (!eint->instances[i].base)
+ return -ENOMEM;
+ }
+
+ matrix_number = of_property_count_u32_elems(node, "mediatek,pins") / ARRAY_0;
+ if (matrix_number < 0) {
+ matrix_number = eint->total_pin_number;
+ dev_info(eint->dev, "%s eint in legacy mode, assign the matrix number to %u.\n",
+ __func__, matrix_number);
+ } else
+ dev_info(eint->dev, "%s eint in new mode, assign the matrix number to %u.\n",
+ __func__, matrix_number);
+
+ for (i = 0; i < matrix_number; i++) {
+ ofset = i * REG_OFSET;
+
+ ret = of_property_read_u32_index(node, "mediatek,pins",
+ ofset, &id);
+ ret |= of_property_read_u32_index(node, "mediatek,pins",
+ ofset+FIRST, &inst);
+ ret |= of_property_read_u32_index(node, "mediatek,pins",
+ ofset+SECOND, &idx);
+ ret |= of_property_read_u32_index(node, "mediatek,pins",
+ ofset+THIRD, &support_deb);
+
+ /* Legacy chip which no need to give coordinate list */
+ if (ret) {
+ id = i;
+ inst = 0;
+ idx = i;
+ support_deb = (i < MAX_BIT) ? 1 : 0;
+ }
+
+ eint->pins[id].enabled = true;
+ eint->pins[id].instance = inst;
+ eint->pins[id].index = idx;
+ eint->pins[id].debounce = support_deb;
+
+ eint->instances[inst].pin_list[idx] = id;
+ eint->instances[inst].number++;
+
+#if defined(MTK_EINT_DEBUG)
+ pin = eint->pins[id];
+ dev_info(eint->dev,
+ "EINT%u in (%u-%u), su_deb = %u",
+ id,
+ pin.instance,
+ eint->instances[inst].number,
+ pin.debounce,
+#endif
+ }
+
+ for (i = 0; i < eint->instance_number; i++) {
+ size = (eint->instances[i].number / MAX_BIT + 1) * sizeof(unsigned int);
+ eint->instances[i].wake_mask =
+ devm_kzalloc(eint->dev, size, GFP_KERNEL);
+ eint->instances[i].cur_mask =
+ devm_kzalloc(eint->dev, size, GFP_KERNEL);
+
+ if (!eint->instances[i].wake_mask ||
+ !eint->instances[i].cur_mask)
+ return -ENOMEM;
+ }
+
+ eint->comp = &default_compat;
+
+ eint->irq = irq_of_parse_and_map(node, 0);
+ if (!eint->irq) {
+ dev_err(eint->dev,
+ "%s IRQ parse fail.\n", __func__);
+ return -EINVAL;
+ }
+
eint->domain = irq_domain_add_linear(eint->dev->of_node,
- eint->hw->ap_num,
+ eint->total_pin_number,
&irq_domain_simple_ops, NULL);
if (!eint->domain)
return -ENOMEM;
- if (eint->hw->db_time) {
- for (i = 0; i < MTK_EINT_DBNC_MAX; i++)
- if (eint->hw->db_time[i] == 0)
- break;
- eint->num_db_time = i;
- }
-
mtk_eint_hw_init(eint);
- for (i = 0; i < eint->hw->ap_num; i++) {
- int virq = irq_create_mapping(eint->domain, i);
+ for (i = 0; i < eint->total_pin_number; i++) {
+ virq = irq_create_mapping(eint->domain, i);
irq_set_chip_and_handler(virq, &mtk_eint_irq_chip,
handle_level_irq);
@@ -533,9 +953,11 @@ int mtk_eint_do_init(struct mtk_eint *eint)
irq_set_chained_handler_and_data(eint->irq, mtk_eint_irq_handler,
eint);
+ global_eintc = eint;
+
return 0;
}
-EXPORT_SYMBOL_GPL(mtk_eint_do_init);
+EXPORT_SYMBOL_GPL(mtk_eint_do_init_v2);
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("MediaTek EINT Driver");
diff --git a/drivers/pinctrl/mediatek/mtk-eint.h b/drivers/pinctrl/mediatek/mtk-eint.h
index 6139b16cd225..aa17a6073029 100644
--- a/drivers/pinctrl/mediatek/mtk-eint.h
+++ b/drivers/pinctrl/mediatek/mtk-eint.h
@@ -11,6 +11,25 @@
#include <linux/irqdomain.h>
+#define MAX_PIN 999
+#define MTK_EINT_EDGE_SENSITIVE 0
+#define MTK_EINT_LEVEL_SENSITIVE 1
+#define MTK_EINT_DBNC_SET_DBNC_BITS 4
+#define MTK_EINT_DBNC_RST_BIT (0x1 << 1)
+#define MTK_EINT_DBNC_SET_EN (0x1 << 0)
+#define MTK_EINT_NO_OFSET 0
+#define MAX_BIT 32
+#define REG_OFSET 4
+#define REG_GROUP 5
+#define REG_VAL 0xFFFFFFFF
+#define DB_GROUP 8
+#define FIRST 1
+#define SECOND 2
+#define THIRD 3
+#define ARRAY_0 4
+
+//#define MTK_EINT_DEBUG
+
struct mtk_eint_regs {
unsigned int stat;
unsigned int ack;
@@ -30,6 +49,36 @@ struct mtk_eint_regs {
unsigned int dbnc_ctrl;
unsigned int dbnc_set;
unsigned int dbnc_clr;
+ unsigned int event;
+ unsigned int event_set;
+ unsigned int event_clr;
+ unsigned int raw_stat;
+};
+
+struct mtk_eint_ops {
+ void (*ack)(struct irq_data *d);
+};
+
+struct mtk_eint_compatible {
+ struct mtk_eint_ops ops;
+ const struct mtk_eint_regs *regs;
+};
+
+struct mtk_eint_instance {
+ const char *name;
+ void __iomem *base;
+ unsigned int number;
+ unsigned int pin_list[MAX_PIN];
+ unsigned int *wake_mask;
+ unsigned int *cur_mask;
+};
+
+struct mtk_eint_pin {
+ bool enabled;
+ unsigned int instance;
+ unsigned int index;
+ bool debounce;
+ bool dual_edge;
};
struct mtk_eint_hw {
@@ -60,11 +109,14 @@ struct mtk_eint {
struct irq_domain *domain;
int irq;
- int *dual_edge;
- u32 *wake_mask;
- u32 *cur_mask;
-
- /* Used to fit into various EINT device */
+ /* An array to record the coordinate, index by global EINT ID */
+ struct mtk_eint_pin *pins;
+ /* An array to record the global EINT ID, index by coordinate*/
+ struct mtk_eint_instance *instances;
+ unsigned int total_pin_number;
+ unsigned int instance_number;
+ unsigned int dump_target_eint;
+ const struct mtk_eint_compatible *comp;
const struct mtk_eint_hw *hw;
const struct mtk_eint_regs *regs;
u16 num_db_time;
@@ -74,13 +126,15 @@ struct mtk_eint {
const struct mtk_eint_xt *gpio_xlate;
};
-#if IS_ENABLED(CONFIG_EINT_MTK)
+#if (IS_ENABLED(CONFIG_EINT_MTK) || IS_ENABLED(CONFIG_DEVICE_MODULES_EINT_MTK))
int mtk_eint_do_init(struct mtk_eint *eint);
+int mtk_eint_do_init_v2(struct mtk_eint *eint);
int mtk_eint_do_suspend(struct mtk_eint *eint);
int mtk_eint_do_resume(struct mtk_eint *eint);
int mtk_eint_set_debounce(struct mtk_eint *eint, unsigned long eint_n,
unsigned int debounce);
int mtk_eint_find_irq(struct mtk_eint *eint, unsigned long eint_n);
+int dump_eint_pin_status(unsigned int eint_num);
#else
static inline int mtk_eint_do_init(struct mtk_eint *eint)
@@ -88,6 +142,11 @@ static inline int mtk_eint_do_init(struct mtk_eint *eint)
return -EOPNOTSUPP;
}
+static inline int mtk_eint_do_init_v2(struct mtk_eint *eint)
+{
+ return -EOPNOTSUPP;
+}
+
static inline int mtk_eint_do_suspend(struct mtk_eint *eint)
{
return -EOPNOTSUPP;
@@ -108,5 +167,9 @@ static inline int mtk_eint_find_irq(struct mtk_eint *eint, unsigned long eint_n)
{
return -EOPNOTSUPP;
}
+static inline int dump_eint_pin_status(unsigned int eint_num)
+{
+ return -EOPNOTSUPP;
+}
#endif
#endif /* __MTK_EINT_H */
diff --git a/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c b/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c
index 54301fbba524..3740e868c650 100644
--- a/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c
+++ b/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c
@@ -375,33 +375,37 @@ int mtk_build_eint(struct mtk_pinctrl *hw, struct platform_device *pdev)
if (!of_property_read_bool(np, "interrupt-controller"))
return -ENODEV;
- hw->eint = devm_kzalloc(hw->dev, sizeof(*hw->eint), GFP_KERNEL);
- if (!hw->eint)
- return -ENOMEM;
-
- hw->eint->base = devm_platform_ioremap_resource_byname(pdev, "eint");
- if (IS_ERR(hw->eint->base)) {
- ret = PTR_ERR(hw->eint->base);
- goto err_free_eint;
- }
+ if (hw->soc->eint_hw) {
+ hw->eint = devm_kzalloc(hw->dev, sizeof(*hw->eint), GFP_KERNEL);
+ if (!hw->eint)
+ return -ENOMEM;
+
+ hw->eint->base = devm_platform_ioremap_resource_byname(pdev, "eint");
+ if (IS_ERR(hw->eint->base)) {
+ ret = PTR_ERR(hw->eint->base);
+ goto err_free_eint;
+ }
- hw->eint->irq = irq_of_parse_and_map(np, 0);
- if (!hw->eint->irq) {
- ret = -EINVAL;
- goto err_free_eint;
- }
+ hw->eint->irq = irq_of_parse_and_map(np, 0);
+ if (!hw->eint->irq) {
+ ret = -EINVAL;
+ goto err_free_eint;
+ }
- if (!hw->soc->eint_hw) {
- ret = -ENODEV;
- goto err_free_eint;
- }
+ hw->eint->dev = &pdev->dev;
+ hw->eint->hw = hw->soc->eint_hw;
+ hw->eint->pctl = hw;
+ hw->eint->gpio_xlate = &mtk_eint_xt;
+
+ return mtk_eint_do_init(hw->eint);
- hw->eint->dev = &pdev->dev;
- hw->eint->hw = hw->soc->eint_hw;
- hw->eint->pctl = hw;
- hw->eint->gpio_xlate = &mtk_eint_xt;
+ } else {
+ hw->eint->dev = &pdev->dev;
+ hw->eint->pctl = hw;
+ hw->eint->gpio_xlate = &mtk_eint_xt;
- return mtk_eint_do_init(hw->eint);
+ return mtk_eint_do_init_v2(hw->eint);
+ }
err_free_eint:
devm_kfree(hw->dev, hw->eint);
--
2.34.1© 2016 - 2024 Red Hat, Inc.