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authorAbhijeet Dharmapurikar <adharmap@codeaurora.org>2017-05-10 19:55:35 +0530
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-06-03 19:05:47 +0900
commit6bc546e71e50b8dd49130033f066676504c29b0c (patch)
treecac01c1e97610eaeefa01781114ae5af3cccd5f9 /drivers/spmi
parent7f1d4e58dabb2668dd89547619ae4138996a8e26 (diff)
spmi: pmic-arb: cleanup unrequested irqs
We see a unmapped irqs trigger right around bootup. This could likely be because the bootloader exited leaving the interrupts in an unknown or unhandled state. Ack and mask the interrupt if one is found. A request_irq later will unmask it and also setup proper mapping structures. Also the current driver ensures that no read/write transaction is in progress while it makes changes to the interrupt regions. This is not necessary because read/writes over spmi and arbiter interrupt control are independent operations. Hence, remove the synchronized accesses to interrupt region. Signed-off-by: Abhijeet Dharmapurikar <adharmap@codeaurora.org> Signed-off-by: Kiran Gunda <kgunda@codeaurora.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/spmi')
-rw-r--r--drivers/spmi/spmi-pmic-arb.c101
1 files changed, 43 insertions, 58 deletions
diff --git a/drivers/spmi/spmi-pmic-arb.c b/drivers/spmi/spmi-pmic-arb.c
index 6320f1f0ea5a..0a5728cab184 100644
--- a/drivers/spmi/spmi-pmic-arb.c
+++ b/drivers/spmi/spmi-pmic-arb.c
@@ -98,6 +98,11 @@ enum pmic_arb_cmd_op_code {
struct pmic_arb_ver_ops;
+struct apid_data {
+ u16 ppid;
+ u8 owner;
+};
+
/**
* spmi_pmic_arb - SPMI PMIC Arbiter object
*
@@ -115,7 +120,6 @@ struct pmic_arb_ver_ops;
* @mapping_table: in-memory copy of PPID -> APID mapping table.
* @domain: irq domain object for PMIC IRQ domain
* @spmic: SPMI controller object
- * @apid_to_ppid: in-memory copy of APID -> PPID mapping table.
* @ver_ops: version dependent operations.
* @ppid_to_apid in-memory copy of PPID -> channel (APID) mapping table.
* v2 only.
@@ -138,11 +142,10 @@ struct spmi_pmic_arb {
DECLARE_BITMAP(mapping_table_valid, PMIC_ARB_MAX_PERIPHS);
struct irq_domain *domain;
struct spmi_controller *spmic;
- u16 *apid_to_ppid;
const struct pmic_arb_ver_ops *ver_ops;
u16 *ppid_to_apid;
u16 last_apid;
- u8 *apid_to_owner;
+ struct apid_data apid_data[PMIC_ARB_MAX_PERIPHS];
};
/**
@@ -482,6 +485,28 @@ static void qpnpint_spmi_read(struct irq_data *d, u8 reg, void *buf, size_t len)
d->irq);
}
+static void cleanup_irq(struct spmi_pmic_arb *pa, u8 apid, int id)
+{
+ u16 ppid = pa->apid_data[apid].ppid;
+ u8 sid = ppid >> 8;
+ u8 per = ppid & 0xFF;
+ u8 irq_mask = BIT(id);
+
+ writel_relaxed(irq_mask, pa->intr + pa->ver_ops->irq_clear(apid));
+
+ if (pmic_arb_write_cmd(pa->spmic, SPMI_CMD_EXT_WRITEL, sid,
+ (per << 8) + QPNPINT_REG_LATCHED_CLR, &irq_mask, 1))
+ dev_err_ratelimited(&pa->spmic->dev,
+ "failed to ack irq_mask = 0x%x for ppid = %x\n",
+ irq_mask, ppid);
+
+ if (pmic_arb_write_cmd(pa->spmic, SPMI_CMD_EXT_WRITEL, sid,
+ (per << 8) + QPNPINT_REG_EN_CLR, &irq_mask, 1))
+ dev_err_ratelimited(&pa->spmic->dev,
+ "failed to ack irq_mask = 0x%x for ppid = %x\n",
+ irq_mask, ppid);
+}
+
static void periph_interrupt(struct spmi_pmic_arb *pa, u8 apid)
{
unsigned int irq;
@@ -493,9 +518,13 @@ static void periph_interrupt(struct spmi_pmic_arb *pa, u8 apid)
id = ffs(status) - 1;
status &= ~BIT(id);
irq = irq_find_mapping(pa->domain,
- pa->apid_to_ppid[apid] << 16
+ pa->apid_data[apid].ppid << 16
| id << 8
| apid);
+ if (irq == 0) {
+ cleanup_irq(pa, apid, id);
+ continue;
+ }
generic_handle_irq(irq);
}
}
@@ -530,12 +559,9 @@ static void qpnpint_irq_ack(struct irq_data *d)
struct spmi_pmic_arb *pa = irq_data_get_irq_chip_data(d);
u8 irq = d->hwirq >> 8;
u8 apid = d->hwirq;
- unsigned long flags;
u8 data;
- raw_spin_lock_irqsave(&pa->lock, flags);
writel_relaxed(BIT(irq), pa->intr + pa->ver_ops->irq_clear(apid));
- raw_spin_unlock_irqrestore(&pa->lock, flags);
data = BIT(irq);
qpnpint_spmi_write(d, QPNPINT_REG_LATCHED_CLR, &data, 1);
@@ -543,23 +569,9 @@ static void qpnpint_irq_ack(struct irq_data *d)
static void qpnpint_irq_mask(struct irq_data *d)
{
- struct spmi_pmic_arb *pa = irq_data_get_irq_chip_data(d);
u8 irq = d->hwirq >> 8;
- u8 apid = d->hwirq;
- unsigned long flags;
- u32 status;
- u8 data;
+ u8 data = BIT(irq);
- raw_spin_lock_irqsave(&pa->lock, flags);
- status = readl_relaxed(pa->intr + pa->ver_ops->acc_enable(apid));
- if (status & SPMI_PIC_ACC_ENABLE_BIT) {
- status = status & ~SPMI_PIC_ACC_ENABLE_BIT;
- writel_relaxed(status, pa->intr +
- pa->ver_ops->acc_enable(apid));
- }
- raw_spin_unlock_irqrestore(&pa->lock, flags);
-
- data = BIT(irq);
qpnpint_spmi_write(d, QPNPINT_REG_EN_CLR, &data, 1);
}
@@ -568,20 +580,12 @@ static void qpnpint_irq_unmask(struct irq_data *d)
struct spmi_pmic_arb *pa = irq_data_get_irq_chip_data(d);
u8 irq = d->hwirq >> 8;
u8 apid = d->hwirq;
- unsigned long flags;
- u32 status;
- u8 data;
+ u8 data = BIT(irq);
- raw_spin_lock_irqsave(&pa->lock, flags);
- status = readl_relaxed(pa->intr + pa->ver_ops->acc_enable(apid));
- if (!(status & SPMI_PIC_ACC_ENABLE_BIT)) {
- writel_relaxed(status | SPMI_PIC_ACC_ENABLE_BIT,
- pa->intr + pa->ver_ops->acc_enable(apid));
- }
- raw_spin_unlock_irqrestore(&pa->lock, flags);
+ writel_relaxed(SPMI_PIC_ACC_ENABLE_BIT,
+ pa->intr + pa->ver_ops->acc_enable(apid));
- data = BIT(irq);
- qpnpint_spmi_write(d, QPNPINT_REG_EN_SET, &data, 1);
+ qpnpint_spmi_write(d, QPNPINT_REG_EN_CLR, &data, 1);
}
static void qpnpint_irq_enable(struct irq_data *d)
@@ -755,7 +759,7 @@ pmic_arb_ppid_to_apid_v1(struct spmi_pmic_arb *pa, u8 sid, u16 addr, u8 *apid)
*apid = SPMI_MAPPING_BIT_IS_1_RESULT(data);
pa->ppid_to_apid[ppid]
= *apid | PMIC_ARB_CHAN_VALID;
- pa->apid_to_ppid[*apid] = ppid;
+ pa->apid_data[*apid].ppid = ppid;
return 0;
}
} else {
@@ -765,7 +769,7 @@ pmic_arb_ppid_to_apid_v1(struct spmi_pmic_arb *pa, u8 sid, u16 addr, u8 *apid)
*apid = SPMI_MAPPING_BIT_IS_0_RESULT(data);
pa->ppid_to_apid[ppid]
= *apid | PMIC_ARB_CHAN_VALID;
- pa->apid_to_ppid[*apid] = ppid;
+ pa->apid_data[*apid].ppid = ppid;
return 0;
}
}
@@ -802,7 +806,7 @@ static u16 pmic_arb_find_apid(struct spmi_pmic_arb *pa, u16 ppid)
for (apid = pa->last_apid; apid < pa->max_periph; apid++) {
regval = readl_relaxed(pa->cnfg +
SPMI_OWNERSHIP_TABLE_REG(apid));
- pa->apid_to_owner[apid] = SPMI_OWNERSHIP_PERIPH2OWNER(regval);
+ pa->apid_data[apid].owner = SPMI_OWNERSHIP_PERIPH2OWNER(regval);
offset = PMIC_ARB_REG_CHNL(apid);
if (offset >= pa->core_size)
@@ -814,7 +818,7 @@ static u16 pmic_arb_find_apid(struct spmi_pmic_arb *pa, u16 ppid)
id = (regval >> 8) & PMIC_ARB_PPID_MASK;
pa->ppid_to_apid[id] = apid | PMIC_ARB_CHAN_VALID;
- pa->apid_to_ppid[apid] = id;
+ pa->apid_data[apid].ppid = id;
if (id == ppid) {
apid |= PMIC_ARB_CHAN_VALID;
break;
@@ -846,7 +850,6 @@ static int
pmic_arb_mode_v2(struct spmi_pmic_arb *pa, u8 sid, u16 addr, mode_t *mode)
{
u8 apid;
- u8 owner;
int rc;
rc = pmic_arb_ppid_to_apid_v2(pa, sid, addr, &apid);
@@ -856,8 +859,7 @@ pmic_arb_mode_v2(struct spmi_pmic_arb *pa, u8 sid, u16 addr, mode_t *mode)
*mode = 0;
*mode |= S_IRUSR;
- owner = pa->apid_to_owner[apid];
- if (owner == pa->ee)
+ if (pa->ee == pa->apid_data[apid].owner)
*mode |= S_IWUSR;
return 0;
}
@@ -1028,15 +1030,6 @@ static int spmi_pmic_arb_probe(struct platform_device *pdev)
err = -ENOMEM;
goto err_put_ctrl;
}
-
- pa->apid_to_owner = devm_kcalloc(&ctrl->dev,
- pa->max_periph,
- sizeof(*pa->apid_to_owner),
- GFP_KERNEL);
- if (!pa->apid_to_owner) {
- err = -ENOMEM;
- goto err_put_ctrl;
- }
}
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "intr");
@@ -1088,14 +1081,6 @@ static int spmi_pmic_arb_probe(struct platform_device *pdev)
pa->ee = ee;
- pa->apid_to_ppid = devm_kcalloc(&ctrl->dev, PMIC_ARB_MAX_PERIPHS,
- sizeof(*pa->apid_to_ppid),
- GFP_KERNEL);
- if (!pa->apid_to_ppid) {
- err = -ENOMEM;
- goto err_put_ctrl;
- }
-
pa->mapping_table = devm_kcalloc(&ctrl->dev, PMIC_ARB_MAX_PERIPHS - 1,
sizeof(*pa->mapping_table), GFP_KERNEL);
if (!pa->mapping_table) {

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