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mfd: ab8500-core: Add Interrupt support for ab8540

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ITSource/ITLatch 7, 8, 9 and 10 don't exist on AB8540. This patch
replaces them with '-1' in the interrupt list, and handles the '-1'
in the code accordingly.

Signed-off-by: Lee Jones <lee.jones@linaro.org>
Acked-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Lee Jones 2013-02-25 14:57:35 +00:00
parent 4b106fb989
commit 3e1a498f27
2 changed files with 44 additions and 7 deletions
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50
drivers/mfd/ab8500-core.c
View File

@ -103,8 +103,10 @@
#define AB8500_IT_LATCHHIER1_REG 0x60
#define AB8500_IT_LATCHHIER2_REG 0x61
#define AB8500_IT_LATCHHIER3_REG 0x62
#define AB8540_IT_LATCHHIER4_REG 0x63
#define AB8500_IT_LATCHHIER_NUM 3
#define AB8540_IT_LATCHHIER_NUM 4
#define AB8500_REV_REG 0x80
#define AB8500_IC_NAME_REG 0x82
@ -143,6 +145,12 @@ static const int ab9540_irq_regoffset[AB9540_NUM_IRQ_REGS] = {
0, 1, 2, 3, 4, 6, 7, 8, 9, 11, 18, 19, 20, 21, 12, 13, 24, 5, 22, 23
};
/* AB8540 support */
static const int ab8540_irq_regoffset[AB8540_NUM_IRQ_REGS] = {
0, 1, 2, 3, 4, -1, -1, -1, -1, 11, 18, 19, 20, 21, 12, 13, 24, 5, 22, 23,
25, 26, 27, 28, 29, 30, 31,
};
static const char ab8500_version_str[][7] = {
[AB8500_VERSION_AB8500] = "AB8500",
[AB8500_VERSION_AB8505] = "AB8505",
@ -360,6 +368,9 @@ static void ab8500_irq_sync_unlock(struct irq_data *data)
is_ab8500_1p1_or_earlier(ab8500))
continue;
if (ab8500->irq_reg_offset[i] < 0)
continue;
ab8500->oldmask[i] = new;
reg = AB8500_IT_MASK1_REG + ab8500->irq_reg_offset[i];
@ -431,6 +442,18 @@ static struct irq_chip ab8500_irq_chip = {
.irq_set_type = ab8500_irq_set_type,
};
static void update_latch_offset(u8 *offset, int i)
{
/* Fix inconsistent ITFromLatch25 bit mapping... */
if (unlikely(*offset == 17))
*offset = 24;
/* Fix inconsistent ab8540 bit mapping... */
if (unlikely(*offset == 16))
*offset = 25;
if ((i==3) && (*offset >= 24))
*offset += 2;
}
static int ab8500_handle_hierarchical_line(struct ab8500 *ab8500,
int latch_offset, u8 latch_val)
{
@ -482,9 +505,7 @@ static int ab8500_handle_hierarchical_latch(struct ab8500 *ab8500,
latch_bit = __ffs(hier_val);
latch_offset = (hier_offset << 3) + latch_bit;
/* Fix inconsistent ITFromLatch25 bit mapping... */
if (unlikely(latch_offset == 17))
latch_offset = 24;
update_latch_offset(&latch_offset, hier_offset);
status = get_register_interruptible(ab8500,
AB8500_INTERRUPT,
@ -512,7 +533,7 @@ static irqreturn_t ab8500_hierarchical_irq(int irq, void *dev)
dev_vdbg(ab8500->dev, "interrupt\n");
/* Hierarchical interrupt version */
for (i = 0; i < AB8500_IT_LATCHHIER_NUM; i++) {
for (i = 0; i < (ab8500->it_latchhier_num); i++) {
int status;
u8 hier_val;
@ -565,6 +586,9 @@ static irqreturn_t ab8500_irq(int irq, void *dev)
if (regoffset == 11 && is_ab8500_1p1_or_earlier(ab8500))
continue;
if (regoffset < 0)
continue;
status = get_register_interruptible(ab8500, AB8500_INTERRUPT,
AB8500_IT_LATCH1_REG + regoffset, &value);
if (status < 0 || value == 0)
@ -615,7 +639,9 @@ static int ab8500_irq_init(struct ab8500 *ab8500, struct device_node *np)
{
int num_irqs;
if (is_ab9540(ab8500))
if (is_ab8540(ab8500))
num_irqs = AB8540_NR_IRQS;
else if (is_ab9540(ab8500))
num_irqs = AB9540_NR_IRQS;
else if (is_ab8505(ab8500))
num_irqs = AB8505_NR_IRQS;
@ -1552,13 +1578,20 @@ static int ab8500_probe(struct platform_device *pdev)
ab8500->chip_id >> 4,
ab8500->chip_id & 0x0F);
/* Configure AB8500 or AB9540 IRQ */
if (is_ab9540(ab8500) || is_ab8505(ab8500)) {
/* Configure AB8540 */
if (is_ab8540(ab8500)) {
ab8500->mask_size = AB8540_NUM_IRQ_REGS;
ab8500->irq_reg_offset = ab8540_irq_regoffset;
ab8500->it_latchhier_num = AB8540_IT_LATCHHIER_NUM;
}/* Configure AB8500 or AB9540 IRQ */
else if (is_ab9540(ab8500) || is_ab8505(ab8500)) {
ab8500->mask_size = AB9540_NUM_IRQ_REGS;
ab8500->irq_reg_offset = ab9540_irq_regoffset;
ab8500->it_latchhier_num = AB8500_IT_LATCHHIER_NUM;
} else {
ab8500->mask_size = AB8500_NUM_IRQ_REGS;
ab8500->irq_reg_offset = ab8500_irq_regoffset;
ab8500->it_latchhier_num = AB8500_IT_LATCHHIER_NUM;
}
ab8500->mask = devm_kzalloc(&pdev->dev, ab8500->mask_size, GFP_KERNEL);
if (!ab8500->mask)
@ -1620,6 +1653,9 @@ static int ab8500_probe(struct platform_device *pdev)
is_ab8500_1p1_or_earlier(ab8500))
continue;
if (ab8500->irq_reg_offset[i] < 0)
continue;
get_register_interruptible(ab8500, AB8500_INTERRUPT,
AB8500_IT_LATCH1_REG + ab8500->irq_reg_offset[i],
&value);

1
include/linux/mfd/abx500/ab8500.h
View File

@ -362,6 +362,7 @@ struct ab8500 {
u8 *oldmask;
int mask_size;
const int *irq_reg_offset;
int it_latchhier_num;
};
struct regulator_reg_init;