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gpio: omap: Add get/set_multiple() callbacks 

This should make applications utilizing whole banks work faster.

Signed-off-by: Janusz Krzysztofik <jmkrzyszt@gmail.com>
Acked-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Janusz Krzysztofik 2018-07-19 01:57:08 +02:00 committed by Linus Walleij
parent ae61bac9c4
commit 442af1403a
1 changed files with 86 additions and 2 deletions
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88
drivers/gpio/gpio-omap.c
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@ -77,6 +77,8 @@ struct gpio_bank {
bool workaround_enabled;
void (*set_dataout)(struct gpio_bank *bank, unsigned gpio, int enable);
void (*set_dataout_multiple)(struct gpio_bank *bank,
unsigned long *mask, unsigned long *bits);
int (*get_context_loss_count)(struct device *dev);
struct omap_gpio_reg_offs *regs;
@ -161,6 +163,51 @@ static int omap_get_gpio_dataout(struct gpio_bank *bank, int offset)
return (readl_relaxed(reg) & (BIT(offset))) != 0;
}
/* set multiple data out values using dedicate set/clear register */
static void omap_set_gpio_dataout_reg_multiple(struct gpio_bank *bank,
unsigned long *mask,
unsigned long *bits)
{
void __iomem *reg = bank->base;
u32 l;
l = *bits & *mask;
writel_relaxed(l, reg + bank->regs->set_dataout);
bank->context.dataout |= l;
l = ~*bits & *mask;
writel_relaxed(l, reg + bank->regs->clr_dataout);
bank->context.dataout &= ~l;
}
/* set multiple data out values using mask register */
static void omap_set_gpio_dataout_mask_multiple(struct gpio_bank *bank,
unsigned long *mask,
unsigned long *bits)
{
void __iomem *reg = bank->base + bank->regs->dataout;
u32 l = (readl_relaxed(reg) & ~*mask) | (*bits & *mask);
writel_relaxed(l, reg);
bank->context.dataout = l;
}
static unsigned long omap_get_gpio_datain_multiple(struct gpio_bank *bank,
unsigned long *mask)
{
void __iomem *reg = bank->base + bank->regs->datain;
return readl_relaxed(reg) & *mask;
}
static unsigned long omap_get_gpio_dataout_multiple(struct gpio_bank *bank,
unsigned long *mask)
{
void __iomem *reg = bank->base + bank->regs->dataout;
return readl_relaxed(reg) & *mask;
}
static inline void omap_gpio_rmw(void __iomem *base, u32 reg, u32 mask, bool set)
{
int l = readl_relaxed(base + reg);
@ -968,6 +1015,26 @@ static int omap_gpio_output(struct gpio_chip *chip, unsigned offset, int value)
return 0;
}
static int omap_gpio_get_multiple(struct gpio_chip *chip, unsigned long *mask,
unsigned long *bits)
{
struct gpio_bank *bank = gpiochip_get_data(chip);
void __iomem *reg = bank->base + bank->regs->direction;
unsigned long in = readl_relaxed(reg), l;
*bits = 0;
l = in & *mask;
if (l)
*bits |= omap_get_gpio_datain_multiple(bank, &l);
l = ~in & *mask;
if (l)
*bits |= omap_get_gpio_dataout_multiple(bank, &l);
return 0;
}
static int omap_gpio_debounce(struct gpio_chip *chip, unsigned offset,
unsigned debounce)
{
@ -1012,6 +1079,17 @@ static void omap_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
raw_spin_unlock_irqrestore(&bank->lock, flags);
}
static void omap_gpio_set_multiple(struct gpio_chip *chip, unsigned long *mask,
unsigned long *bits)
{
struct gpio_bank *bank = gpiochip_get_data(chip);
unsigned long flags;
raw_spin_lock_irqsave(&bank->lock, flags);
bank->set_dataout_multiple(bank, mask, bits);
raw_spin_unlock_irqrestore(&bank->lock, flags);
}
/*---------------------------------------------------------------------*/
static void omap_gpio_show_rev(struct gpio_bank *bank)
@ -1073,9 +1151,11 @@ static int omap_gpio_chip_init(struct gpio_bank *bank, struct irq_chip *irqc)
bank->chip.get_direction = omap_gpio_get_direction;
bank->chip.direction_input = omap_gpio_input;
bank->chip.get = omap_gpio_get;
bank->chip.get_multiple = omap_gpio_get_multiple;
bank->chip.direction_output = omap_gpio_output;
bank->chip.set_config = omap_gpio_set_config;
bank->chip.set = omap_gpio_set;
bank->chip.set_multiple = omap_gpio_set_multiple;
if (bank->is_mpuio) {
bank->chip.label = "mpuio";
if (bank->regs->wkup_en)
@ -1209,10 +1289,14 @@ static int omap_gpio_probe(struct platform_device *pdev)
pdata->get_context_loss_count;
}
if (bank->regs->set_dataout && bank->regs->clr_dataout)
if (bank->regs->set_dataout && bank->regs->clr_dataout) {
bank->set_dataout = omap_set_gpio_dataout_reg;
else
bank->set_dataout_multiple = omap_set_gpio_dataout_reg_multiple;
} else {
bank->set_dataout = omap_set_gpio_dataout_mask;
bank->set_dataout_multiple =
omap_set_gpio_dataout_mask_multiple;
}
raw_spin_lock_init(&bank->lock);
raw_spin_lock_init(&bank->wa_lock);