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pinctrl: sunxi: Fix A33 external interrupts not working

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pinctrl-sun8i-a33.c (and the dts) declare only 2 interrupt banks,
where as the closely related a23 has 3 banks. This matches with the
datasheet for the A33 where only interrupt banks B and G are specified
where as the A23 has banks A, B and G.

However the A33 being the A23 derative it is means that the interrupt
configure/status io-addresses for the 2 banks it has are not changed
from the A23, iow they have the same address as if bank A was still
present. Where as the sunxi pinctrl currently tries to use the A23 bank
A addresses for bank B, since the pinctrl code does not know about the
removed bank A.

Add a irq_bank_base parameter and use this where appropriate to take
the missing bank A into account.

This fixes external interrupts not working on the A33 (tested with
an i2c touchscreen controller which uses an external interrupt).

Cc: stable@vger.kernel.org
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Hans de Goede 2016-03-12 19:44:57 +01:00 committed by Linus Walleij
parent e9adb336d0
commit 5e7515ba78
3 changed files with 22 additions and 17 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

1
drivers/pinctrl/sunxi/pinctrl-sun8i-a33.c
View file

@ -485,6 +485,7 @@ static const struct sunxi_pinctrl_desc sun8i_a33_pinctrl_data = {
.pins = sun8i_a33_pins,
.npins = ARRAY_SIZE(sun8i_a33_pins),
.irq_banks = 2,
.irq_bank_base = 1,
};
static int sun8i_a33_pinctrl_probe(struct platform_device *pdev)

17
drivers/pinctrl/sunxi/pinctrl-sunxi.c
View file

@ -579,7 +579,7 @@ static void sunxi_pinctrl_irq_release_resources(struct irq_data *d)
static int sunxi_pinctrl_irq_set_type(struct irq_data *d, unsigned int type)
{
struct sunxi_pinctrl *pctl = irq_data_get_irq_chip_data(d);
u32 reg = sunxi_irq_cfg_reg(d->hwirq);
u32 reg = sunxi_irq_cfg_reg(d->hwirq, pctl->desc->irq_bank_base);
u8 index = sunxi_irq_cfg_offset(d->hwirq);
unsigned long flags;
u32 regval;
@ -626,7 +626,8 @@ static int sunxi_pinctrl_irq_set_type(struct irq_data *d, unsigned int type)
static void sunxi_pinctrl_irq_ack(struct irq_data *d)
{
struct sunxi_pinctrl *pctl = irq_data_get_irq_chip_data(d);
u32 status_reg = sunxi_irq_status_reg(d->hwirq);
u32 status_reg = sunxi_irq_status_reg(d->hwirq,
pctl->desc->irq_bank_base);
u8 status_idx = sunxi_irq_status_offset(d->hwirq);
/* Clear the IRQ */
@ -636,7 +637,7 @@ static void sunxi_pinctrl_irq_ack(struct irq_data *d)
static void sunxi_pinctrl_irq_mask(struct irq_data *d)
{
struct sunxi_pinctrl *pctl = irq_data_get_irq_chip_data(d);
u32 reg = sunxi_irq_ctrl_reg(d->hwirq);
u32 reg = sunxi_irq_ctrl_reg(d->hwirq, pctl->desc->irq_bank_base);
u8 idx = sunxi_irq_ctrl_offset(d->hwirq);
unsigned long flags;
u32 val;
@ -653,7 +654,7 @@ static void sunxi_pinctrl_irq_mask(struct irq_data *d)
static void sunxi_pinctrl_irq_unmask(struct irq_data *d)
{
struct sunxi_pinctrl *pctl = irq_data_get_irq_chip_data(d);
u32 reg = sunxi_irq_ctrl_reg(d->hwirq);
u32 reg = sunxi_irq_ctrl_reg(d->hwirq, pctl->desc->irq_bank_base);
u8 idx = sunxi_irq_ctrl_offset(d->hwirq);
unsigned long flags;
u32 val;
@ -745,7 +746,7 @@ static void sunxi_pinctrl_irq_handler(struct irq_desc *desc)
if (bank == pctl->desc->irq_banks)
return;
reg = sunxi_irq_status_reg_from_bank(bank);
reg = sunxi_irq_status_reg_from_bank(bank, pctl->desc->irq_bank_base);
val = readl(pctl->membase + reg);
if (val) {
@ -1024,9 +1025,11 @@ int sunxi_pinctrl_init(struct platform_device *pdev,
for (i = 0; i < pctl->desc->irq_banks; i++) {
/* Mask and clear all IRQs before registering a handler */
writel(0, pctl->membase + sunxi_irq_ctrl_reg_from_bank(i));
writel(0, pctl->membase + sunxi_irq_ctrl_reg_from_bank(i,
pctl->desc->irq_bank_base));
writel(0xffffffff,
pctl->membase + sunxi_irq_status_reg_from_bank(i));
pctl->membase + sunxi_irq_status_reg_from_bank(i,
pctl->desc->irq_bank_base));
irq_set_chained_handler_and_data(pctl->irq[i],
sunxi_pinctrl_irq_handler,

21
drivers/pinctrl/sunxi/pinctrl-sunxi.h
View file

@ -97,6 +97,7 @@ struct sunxi_pinctrl_desc {
int npins;
unsigned pin_base;
unsigned irq_banks;
unsigned irq_bank_base;
bool irq_read_needs_mux;
};
@ -233,12 +234,12 @@ static inline u32 sunxi_pull_offset(u16 pin)
return pin_num * PULL_PINS_BITS;
}
static inline u32 sunxi_irq_cfg_reg(u16 irq)
static inline u32 sunxi_irq_cfg_reg(u16 irq, unsigned bank_base)
{
u8 bank = irq / IRQ_PER_BANK;
u8 reg = (irq % IRQ_PER_BANK) / IRQ_CFG_IRQ_PER_REG * 0x04;
return IRQ_CFG_REG + bank * IRQ_MEM_SIZE + reg;
return IRQ_CFG_REG + (bank_base + bank) * IRQ_MEM_SIZE + reg;
}
static inline u32 sunxi_irq_cfg_offset(u16 irq)
@ -247,16 +248,16 @@ static inline u32 sunxi_irq_cfg_offset(u16 irq)
return irq_num * IRQ_CFG_IRQ_BITS;
}
static inline u32 sunxi_irq_ctrl_reg_from_bank(u8 bank)
static inline u32 sunxi_irq_ctrl_reg_from_bank(u8 bank, unsigned bank_base)
{
return IRQ_CTRL_REG + bank * IRQ_MEM_SIZE;
return IRQ_CTRL_REG + (bank_base + bank) * IRQ_MEM_SIZE;
}
static inline u32 sunxi_irq_ctrl_reg(u16 irq)
static inline u32 sunxi_irq_ctrl_reg(u16 irq, unsigned bank_base)
{
u8 bank = irq / IRQ_PER_BANK;
return sunxi_irq_ctrl_reg_from_bank(bank);
return sunxi_irq_ctrl_reg_from_bank(bank, bank_base);
}
static inline u32 sunxi_irq_ctrl_offset(u16 irq)
@ -265,16 +266,16 @@ static inline u32 sunxi_irq_ctrl_offset(u16 irq)
return irq_num * IRQ_CTRL_IRQ_BITS;
}
static inline u32 sunxi_irq_status_reg_from_bank(u8 bank)
static inline u32 sunxi_irq_status_reg_from_bank(u8 bank, unsigned bank_base)
{
return IRQ_STATUS_REG + bank * IRQ_MEM_SIZE;
return IRQ_STATUS_REG + (bank_base + bank) * IRQ_MEM_SIZE;
}
static inline u32 sunxi_irq_status_reg(u16 irq)
static inline u32 sunxi_irq_status_reg(u16 irq, unsigned bank_base)
{
u8 bank = irq / IRQ_PER_BANK;
return sunxi_irq_status_reg_from_bank(bank);
return sunxi_irq_status_reg_from_bank(bank, bank_base);
}
static inline u32 sunxi_irq_status_offset(u16 irq)