Am Mittwoch, den 30.01.2019, 13:06 +0000 schrieb Aisheng Dong: > One group can manage 64 interrupts by using two registers (e.g. STATUS/SET). > However, the integrated irqsteer may support only 32 interrupts which > needs only one register in a group. But the current driver assume there's > a mininum of two registers in a group which result in a wrong register map > for 32 interrupts per channel irqsteer. Let's use the reg_num caculated by > interrupts per channel instead of irq_group to cover this case. > > > Cc: Marc Zyngier <[email protected]> > > Cc: Rob Herring <[email protected]> > > Cc: Lucas Stach <[email protected]> > > Cc: Shawn Guo <[email protected]> > Signed-off-by: Dong Aisheng <[email protected]>
Minor nit below, otherwise: Reviewed-by: Lucas Stach <[email protected]> > --- > v1->v2: > * The using of property name updated accordingly > --- > drivers/irqchip/irq-imx-irqsteer.c | 35 +++++++++++++++++++---------------- > 1 file changed, 19 insertions(+), 16 deletions(-) > > diff --git a/drivers/irqchip/irq-imx-irqsteer.c > b/drivers/irqchip/irq-imx-irqsteer.c > index 5b3f1d7..67ed862 100644 > --- a/drivers/irqchip/irq-imx-irqsteer.c > +++ b/drivers/irqchip/irq-imx-irqsteer.c > @@ -13,7 +13,7 @@ > #include <linux/of_platform.h> > #include <linux/spinlock.h> > > > -#define CTRL_STRIDE_OFF(_t, _r) (_t * 8 * _r) > > +#define CTRL_STRIDE_OFF(_t, _r) (_t * 4 * _r) > > #define CHANCTRL 0x0 > > #define CHANMASK(n, t) (CTRL_STRIDE_OFF(t, 0) + 0x4 * (n) + > > 0x4) > > #define CHANSET(n, t) (CTRL_STRIDE_OFF(t, 1) + 0x4 * (n) + > > 0x4) > @@ -26,7 +26,7 @@ struct irqsteer_data { > > > struct clk *ipg_clk; > > > int irq; > > > raw_spinlock_t lock; > > > - int irq_groups; > > > + int reg_num; > > > int channel; > > > struct irq_domain *domain; > > > u32 *saved_reg; > @@ -35,7 +35,7 @@ struct irqsteer_data { > static int imx_irqsteer_get_reg_index(struct irqsteer_data *data, > > unsigned long irqnum) > { > > - return (data->irq_groups * 2 - irqnum / 32 - 1); > > + return (data->reg_num - irqnum / 32 - 1); > } > > static void imx_irqsteer_irq_unmask(struct irq_data *d) > @@ -46,9 +46,9 @@ static void imx_irqsteer_irq_unmask(struct irq_data *d) > > u32 val; > > > raw_spin_lock_irqsave(&data->lock, flags); > > - val = readl_relaxed(data->regs + CHANMASK(idx, data->irq_groups)); > > + val = readl_relaxed(data->regs + CHANMASK(idx, data->reg_num)); > > val |= BIT(d->hwirq % 32); > > - writel_relaxed(val, data->regs + CHANMASK(idx, data->irq_groups)); > > + writel_relaxed(val, data->regs + CHANMASK(idx, data->reg_num)); > > raw_spin_unlock_irqrestore(&data->lock, flags); > } > > @@ -60,9 +60,9 @@ static void imx_irqsteer_irq_mask(struct irq_data *d) > > u32 val; > > > raw_spin_lock_irqsave(&data->lock, flags); > > - val = readl_relaxed(data->regs + CHANMASK(idx, data->irq_groups)); > > + val = readl_relaxed(data->regs + CHANMASK(idx, data->reg_num)); > > val &= ~BIT(d->hwirq % 32); > > - writel_relaxed(val, data->regs + CHANMASK(idx, data->irq_groups)); > > + writel_relaxed(val, data->regs + CHANMASK(idx, data->reg_num)); > > raw_spin_unlock_irqrestore(&data->lock, flags); > } > > @@ -94,13 +94,13 @@ static void imx_irqsteer_irq_handler(struct irq_desc > *desc) > > > chained_irq_enter(irq_desc_get_chip(desc), desc); > > > - for (i = 0; i < data->irq_groups * 64; i += 32) { > > + for (i = 0; i < data->reg_num * 32; i += 32) { > > int idx = imx_irqsteer_get_reg_index(data, i); > > unsigned long irqmap; > > int pos, virq; > > > irqmap = readl_relaxed(data->regs + > > - CHANSTATUS(idx, data->irq_groups)); > > + CHANSTATUS(idx, data->reg_num)); > > > for_each_set_bit(pos, &irqmap, 32) { > > virq = irq_find_mapping(data->domain, pos + i); > @@ -146,12 +146,15 @@ static int imx_irqsteer_probe(struct platform_device > *pdev) > > > raw_spin_lock_init(&data->lock); > > > - of_property_read_u32(np, "fsl,irq-groups", &data->irq_groups); > > + of_property_read_u32(np, "fsl,num-irqs", &data->reg_num); > > of_property_read_u32(np, "fsl,channel", &data->channel); > > > + /* one register bit map represents 32 input interrupts */ > > + data->reg_num /= 32; > + > > if (IS_ENABLED(CONFIG_PM_SLEEP)) { > > data->saved_reg = devm_kzalloc(&pdev->dev, > > - sizeof(u32) * data->irq_groups * 2, > > + sizeof(u32) * data->reg_num, > GFP_KERNEL); Does this last parameter now fit on the line above? > if (!data->saved_reg) > > return -ENOMEM; > @@ -166,7 +169,7 @@ static int imx_irqsteer_probe(struct platform_device > *pdev) > > /* steer all IRQs into configured channel */ > > writel_relaxed(BIT(data->channel), data->regs + CHANCTRL); > > > - data->domain = irq_domain_add_linear(np, data->irq_groups * 64, > > + data->domain = irq_domain_add_linear(np, data->reg_num * 32, > > &imx_irqsteer_domain_ops, data); > > if (!data->domain) { > > dev_err(&pdev->dev, "failed to create IRQ domain\n"); > @@ -199,9 +202,9 @@ static void imx_irqsteer_save_regs(struct irqsteer_data > *data) > { > > int i; > > > - for (i = 0; i < data->irq_groups * 2; i++) > > + for (i = 0; i < data->reg_num; i++) > > data->saved_reg[i] = readl_relaxed(data->regs + > > - CHANMASK(i, data->irq_groups)); > > + CHANMASK(i, data->reg_num)); > } > > static void imx_irqsteer_restore_regs(struct irqsteer_data *data) > @@ -209,9 +212,9 @@ static void imx_irqsteer_restore_regs(struct > irqsteer_data *data) > > int i; > > > writel_relaxed(BIT(data->channel), data->regs + CHANCTRL); > > - for (i = 0; i < data->irq_groups * 2; i++) > > + for (i = 0; i < data->reg_num; i++) > > writel_relaxed(data->saved_reg[i], > > - data->regs + CHANMASK(i, data->irq_groups)); > > + data->regs + CHANMASK(i, data->reg_num)); > } > > static int imx_irqsteer_suspend(struct device *dev)
