diff options
Diffstat (limited to 'drivers/gpio/gpio-stmpe.c')
| -rw-r--r-- | drivers/gpio/gpio-stmpe.c | 64 |
1 files changed, 34 insertions, 30 deletions
diff --git a/drivers/gpio/gpio-stmpe.c b/drivers/gpio/gpio-stmpe.c index 16cbc5702865..f8d7d1cd8488 100644 --- a/drivers/gpio/gpio-stmpe.c +++ b/drivers/gpio/gpio-stmpe.c @@ -190,6 +190,16 @@ static void stmpe_gpio_irq_sync_unlock(struct irq_data *d) }; int i, j; + /* + * STMPE1600: to be able to get IRQ from pins, + * a read must be done on GPMR register, or a write in + * GPSR or GPCR registers + */ + if (stmpe->partnum == STMPE1600) { + stmpe_reg_read(stmpe, stmpe->regs[STMPE_IDX_GPMR_LSB]); + stmpe_reg_read(stmpe, stmpe->regs[STMPE_IDX_GPMR_CSB]); + } + for (i = 0; i < CACHE_NR_REGS; i++) { /* STMPE801 and STMPE1600 don't have RE and FE registers */ if ((stmpe->partnum == STMPE801 || @@ -227,21 +237,11 @@ static void stmpe_gpio_irq_unmask(struct irq_data *d) { struct gpio_chip *gc = irq_data_get_irq_chip_data(d); struct stmpe_gpio *stmpe_gpio = gpiochip_get_data(gc); - struct stmpe *stmpe = stmpe_gpio->stmpe; int offset = d->hwirq; int regoffset = offset / 8; int mask = BIT(offset % 8); stmpe_gpio->regs[REG_IE][regoffset] |= mask; - - /* - * STMPE1600 workaround: to be able to get IRQ from pins, - * a read must be done on GPMR register, or a write in - * GPSR or GPCR registers - */ - if (stmpe->partnum == STMPE1600) - stmpe_reg_read(stmpe, - stmpe->regs[STMPE_IDX_GPMR_LSB + regoffset]); } static void stmpe_dbg_show_one(struct seq_file *s, @@ -273,15 +273,21 @@ static void stmpe_dbg_show_one(struct seq_file *s, u8 fall_reg; u8 irqen_reg; - char *edge_det_values[] = {"edge-inactive", - "edge-asserted", - "not-supported"}; - char *rise_values[] = {"no-rising-edge-detection", - "rising-edge-detection", - "not-supported"}; - char *fall_values[] = {"no-falling-edge-detection", - "falling-edge-detection", - "not-supported"}; + static const char * const edge_det_values[] = { + "edge-inactive", + "edge-asserted", + "not-supported" + }; + static const char * const rise_values[] = { + "no-rising-edge-detection", + "rising-edge-detection", + "not-supported" + }; + static const char * const fall_values[] = { + "no-falling-edge-detection", + "falling-edge-detection", + "not-supported" + }; #define NOT_SUPPORTED_IDX 2 u8 edge_det = NOT_SUPPORTED_IDX; u8 rise = NOT_SUPPORTED_IDX; @@ -299,7 +305,7 @@ static void stmpe_dbg_show_one(struct seq_file *s, if (ret < 0) return; edge_det = !!(ret & mask); - + /* fall through */ case STMPE1801: rise_reg = stmpe->regs[STMPE_IDX_GPRER_LSB + bank]; fall_reg = stmpe->regs[STMPE_IDX_GPFER_LSB + bank]; @@ -312,7 +318,7 @@ static void stmpe_dbg_show_one(struct seq_file *s, if (ret < 0) return; fall = !!(ret & mask); - + /* fall through */ case STMPE801: case STMPE1600: irqen_reg = stmpe->regs[STMPE_IDX_IEGPIOR_LSB + bank]; @@ -344,7 +350,7 @@ static void stmpe_dbg_show(struct seq_file *s, struct gpio_chip *gc) for (i = 0; i < gc->ngpio; i++, gpio++) { stmpe_dbg_show_one(s, gc, i, gpio); - seq_printf(s, "\n"); + seq_putc(s, '\n'); } } @@ -397,7 +403,7 @@ static irqreturn_t stmpe_gpio_irq(int irq, void *dev) while (stat) { int bit = __ffs(stat); int line = bank * 8 + bit; - int child_irq = irq_find_mapping(stmpe_gpio->chip.irqdomain, + int child_irq = irq_find_mapping(stmpe_gpio->chip.irq.domain, line); handle_nested_irq(child_irq); @@ -426,12 +432,9 @@ static int stmpe_gpio_probe(struct platform_device *pdev) struct stmpe *stmpe = dev_get_drvdata(pdev->dev.parent); struct device_node *np = pdev->dev.of_node; struct stmpe_gpio *stmpe_gpio; - int ret; - int irq = 0; - - irq = platform_get_irq(pdev, 0); + int ret, irq; - stmpe_gpio = kzalloc(sizeof(struct stmpe_gpio), GFP_KERNEL); + stmpe_gpio = kzalloc(sizeof(*stmpe_gpio), GFP_KERNEL); if (!stmpe_gpio) return -ENOMEM; @@ -451,8 +454,9 @@ static int stmpe_gpio_probe(struct platform_device *pdev) of_property_read_u32(np, "st,norequest-mask", &stmpe_gpio->norequest_mask); if (stmpe_gpio->norequest_mask) - stmpe_gpio->chip.irq_need_valid_mask = true; + stmpe_gpio->chip.irq.need_valid_mask = true; + irq = platform_get_irq(pdev, 0); if (irq < 0) dev_info(&pdev->dev, "device configured in no-irq mode: " @@ -482,7 +486,7 @@ static int stmpe_gpio_probe(struct platform_device *pdev) /* Forbid unused lines to be mapped as IRQs */ for (i = 0; i < sizeof(u32); i++) if (stmpe_gpio->norequest_mask & BIT(i)) - clear_bit(i, stmpe_gpio->chip.irq_valid_mask); + clear_bit(i, stmpe_gpio->chip.irq.valid_mask); } ret = gpiochip_irqchip_add_nested(&stmpe_gpio->chip, &stmpe_gpio_irq_chip, |