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irqchip: spear_shirq: Kill the clear_reg nonsense 

None of the chips has a ACK register. The code brainlessly fiddles
with the enable register, so it might even reenable a disabled
interrupt at least on spear300.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/20140619212713.570396433@linutronix.de
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
hifive-unleashed-5.1
Thomas Gleixner 2014-06-19 21:34:41 +00:00 committed by Jason Cooper
parent 4ecc832f4e
commit 97dcc21bd3
1 changed files with 1 additions and 34 deletions
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35
drivers/irqchip/spear-shirq.c
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@ -33,15 +33,11 @@
* reset_to_enb: val 1 indicates, we need to clear bit for enabling interrupt
* status_reg: status register offset
* status_reg_mask: status register valid mask
* clear_reg: clear register offset
* reset_to_clear: val 1 indicates, we need to clear bit for clearing interrupt
*/
struct shirq_regs {
u32 enb_reg;
u32 reset_to_enb;
u32 status_reg;
u32 clear_reg;
u32 reset_to_clear;
};
/*
@ -78,7 +74,6 @@ static struct spear_shirq spear300_shirq_ras1 = {
.regs = {
.enb_reg = SPEAR300_INT_ENB_MASK_REG,
.status_reg = SPEAR300_INT_STS_MASK_REG,
.clear_reg = -1,
},
};
@ -96,7 +91,6 @@ static struct spear_shirq spear310_shirq_ras1 = {
.regs = {
.enb_reg = -1,
.status_reg = SPEAR310_INT_STS_MASK_REG,
.clear_reg = -1,
},
};
@ -107,7 +101,6 @@ static struct spear_shirq spear310_shirq_ras2 = {
.regs = {
.enb_reg = -1,
.status_reg = SPEAR310_INT_STS_MASK_REG,
.clear_reg = -1,
},
};
@ -118,7 +111,6 @@ static struct spear_shirq spear310_shirq_ras3 = {
.regs = {
.enb_reg = -1,
.status_reg = SPEAR310_INT_STS_MASK_REG,
.clear_reg = -1,
},
};
@ -129,7 +121,6 @@ static struct spear_shirq spear310_shirq_intrcomm_ras = {
.regs = {
.enb_reg = -1,
.status_reg = SPEAR310_INT_STS_MASK_REG,
.clear_reg = -1,
},
};
@ -150,13 +141,6 @@ static struct spear_shirq spear320_shirq_ras3 = {
.nr_irqs = 7,
.mask = ((0x1 << 7) - 1) << 0,
.disabled = 1,
.regs = {
.enb_reg = SPEAR320_INT_ENB_MASK_REG,
.reset_to_enb = 1,
.status_reg = SPEAR320_INT_STS_MASK_REG,
.clear_reg = SPEAR320_INT_CLR_MASK_REG,
.reset_to_clear = 1,
},
};
static struct spear_shirq spear320_shirq_ras1 = {
@ -166,8 +150,6 @@ static struct spear_shirq spear320_shirq_ras1 = {
.regs = {
.enb_reg = -1,
.status_reg = SPEAR320_INT_STS_MASK_REG,
.clear_reg = SPEAR320_INT_CLR_MASK_REG,
.reset_to_clear = 1,
},
};
@ -178,8 +160,6 @@ static struct spear_shirq spear320_shirq_ras2 = {
.regs = {
.enb_reg = -1,
.status_reg = SPEAR320_INT_STS_MASK_REG,
.clear_reg = SPEAR320_INT_CLR_MASK_REG,
.reset_to_clear = 1,
},
};
@ -190,8 +170,6 @@ static struct spear_shirq spear320_shirq_intrcomm_ras = {
.regs = {
.enb_reg = -1,
.status_reg = SPEAR320_INT_STS_MASK_REG,
.clear_reg = SPEAR320_INT_CLR_MASK_REG,
.reset_to_clear = 1,
},
};
@ -246,7 +224,7 @@ static void shirq_handler(unsigned irq, struct irq_desc *desc)
struct spear_shirq *shirq = irq_get_handler_data(irq);
struct irq_data *idata = irq_desc_get_irq_data(desc);
struct irq_chip *chip = irq_data_get_irq_chip(idata);
u32 i, j, val, mask, tmp;
u32 i, j, val, mask;
chip->irq_ack(idata);
@ -261,17 +239,6 @@ static void shirq_handler(unsigned irq, struct irq_desc *desc)
continue;
generic_handle_irq(shirq->virq_base + i);
/* clear interrupt */
if (shirq->regs.clear_reg == -1)
continue;
tmp = readl(shirq->base + shirq->regs.clear_reg);
if (shirq->regs.reset_to_clear)
tmp &= ~(j << shirq->offset);
else
tmp |= (j << shirq->offset);
writel(tmp, shirq->base + shirq->regs.clear_reg);
}
}
chip->irq_unmask(idata);