renegade-project/linux-next
2
0
Fork 0
mirror of https://github.com/edk2-porting/linux-next.git synced 2024-11-20 16:46:23 +08:00
Code

ARM: SAMSUNG: Convert irq-uart to generic irq chip

Browse Source 
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Thomas Gleixner 2011-05-09 10:10:22 +02:00 committed by Mark Brown
parent 2d2e1d3c40
commit bd7e388035
1 changed files with 12 additions and 71 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

83
arch/arm/plat-samsung/irq-uart.c
View File

@ -27,60 +27,6 @@
/* Note, we make use of the fact that the parent IRQs, IRQ_UART[0..3]
* are consecutive when looking up the interrupt in the demux routines.
*/
static inline void __iomem *s3c_irq_uart_base(struct irq_data *data)
{
struct s3c_uart_irq *uirq = irq_data_get_irq_chip_data(data);
return uirq->regs;
}
static inline unsigned int s3c_irq_uart_bit(unsigned int irq)
{
return irq & 3;
}
static void s3c_irq_uart_mask(struct irq_data *data)
{
void __iomem *regs = s3c_irq_uart_base(data);
unsigned int bit = s3c_irq_uart_bit(data->irq);
u32 reg;
reg = __raw_readl(regs + S3C64XX_UINTM);
reg |= (1 << bit);
__raw_writel(reg, regs + S3C64XX_UINTM);
}
static void s3c_irq_uart_maskack(struct irq_data *data)
{
void __iomem *regs = s3c_irq_uart_base(data);
unsigned int bit = s3c_irq_uart_bit(data->irq);
u32 reg;
reg = __raw_readl(regs + S3C64XX_UINTM);
reg |= (1 << bit);
__raw_writel(reg, regs + S3C64XX_UINTM);
__raw_writel(1 << bit, regs + S3C64XX_UINTP);
}
static void s3c_irq_uart_unmask(struct irq_data *data)
{
void __iomem *regs = s3c_irq_uart_base(data);
unsigned int bit = s3c_irq_uart_bit(data->irq);
u32 reg;
reg = __raw_readl(regs + S3C64XX_UINTM);
reg &= ~(1 << bit);
__raw_writel(reg, regs + S3C64XX_UINTM);
}
static void s3c_irq_uart_ack(struct irq_data *data)
{
void __iomem *regs = s3c_irq_uart_base(data);
unsigned int bit = s3c_irq_uart_bit(data->irq);
__raw_writel(1 << bit, regs + S3C64XX_UINTP);
}
static void s3c_irq_demux_uart(unsigned int irq, struct irq_desc *desc)
{
struct s3c_uart_irq *uirq = desc->irq_data.handler_data;
@ -97,30 +43,25 @@ static void s3c_irq_demux_uart(unsigned int irq, struct irq_desc *desc)
generic_handle_irq(base + 3);
}
static struct irq_chip s3c_irq_uart = {
.name = "s3c-uart",
.irq_mask = s3c_irq_uart_mask,
.irq_unmask = s3c_irq_uart_unmask,
.irq_mask_ack = s3c_irq_uart_maskack,
.irq_ack = s3c_irq_uart_ack,
};
static void __init s3c_init_uart_irq(struct s3c_uart_irq *uirq)
{
void __iomem *reg_base = uirq->regs;
unsigned int irq;
int offs;
struct irq_chip_generic *gc;
struct irq_chip_type *ct;
/* mask all interrupts at the start. */
__raw_writel(0xf, reg_base + S3C64XX_UINTM);
for (offs = 0; offs < 3; offs++) {
irq = uirq->base_irq + offs;
irq_set_chip_and_handler(irq, &s3c_irq_uart, handle_level_irq);
irq_set_chip_data(irq, uirq);
set_irq_flags(irq, IRQF_VALID);
}
gc = irq_alloc_generic_chip("s3c-uart", 1, uirq->base_irq, reg_base,
handle_level_irq);
ct = gc->chip_types;
ct->chip.irq_ack = irq_gc_ack;
ct->chip.irq_mask = irq_gc_mask_set_bit;
ct->chip.irq_unmask = irq_gc_mask_clr_bit;
ct->regs.ack = S3C64XX_UINTP;
ct->regs.mask = S3C64XX_UINTM;
irq_setup_generic_chip(gc, IRQ_MSK(4), IRQ_GC_INIT_MASK_CACHE,
IRQ_NOREQUEST | IRQ_NOPROBE, 0);
irq_set_handler_data(uirq->parent_irq, uirq);
irq_set_chained_handler(uirq->parent_irq, s3c_irq_demux_uart);