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ARM: 6354/1: nomadik-gpio: allow control of sleep mode direction and pull up
DB8500v2 allows control of direction and pull up/down configuration in sleep mode, instead of switching the pin to input with pull up/down enabled. Acked-by: Linus Walleij <linus.walleij@stericsson.com> Signed-off-by: Rabin Vincent <rabin.vincent@stericsson.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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@ -102,6 +102,22 @@ static void __nmk_gpio_make_input(struct nmk_gpio_chip *nmk_chip,
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writel(1 << offset, nmk_chip->addr + NMK_GPIO_DIRC);
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}
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static void __nmk_gpio_set_output(struct nmk_gpio_chip *nmk_chip,
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unsigned offset, int val)
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{
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if (val)
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writel(1 << offset, nmk_chip->addr + NMK_GPIO_DATS);
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else
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writel(1 << offset, nmk_chip->addr + NMK_GPIO_DATC);
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}
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static void __nmk_gpio_make_output(struct nmk_gpio_chip *nmk_chip,
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unsigned offset, int val)
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{
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writel(1 << offset, nmk_chip->addr + NMK_GPIO_DIRS);
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__nmk_gpio_set_output(nmk_chip, offset, val);
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}
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static void __nmk_config_pin(struct nmk_gpio_chip *nmk_chip, unsigned offset,
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pin_cfg_t cfg)
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{
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@ -126,12 +142,21 @@ static void __nmk_config_pin(struct nmk_gpio_chip *nmk_chip, unsigned offset,
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int pull = PIN_PULL(cfg);
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int af = PIN_ALT(cfg);
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int slpm = PIN_SLPM(cfg);
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int output = PIN_DIR(cfg);
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int val = PIN_VAL(cfg);
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dev_dbg(nmk_chip->chip.dev, "pin %d: af %s, pull %s, slpm %s\n",
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pin, afnames[af], pullnames[pull], slpmnames[slpm]);
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dev_dbg(nmk_chip->chip.dev, "pin %d: af %s, pull %s, slpm %s (%s%s)\n",
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pin, afnames[af], pullnames[pull], slpmnames[slpm],
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output ? "output " : "input",
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output ? (val ? "high" : "low") : "");
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if (output)
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__nmk_gpio_make_output(nmk_chip, offset, val);
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else {
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__nmk_gpio_make_input(nmk_chip, offset);
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__nmk_gpio_set_pull(nmk_chip, offset, pull);
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}
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__nmk_gpio_make_input(nmk_chip, offset);
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__nmk_gpio_set_pull(nmk_chip, offset, pull);
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__nmk_gpio_set_slpm(nmk_chip, offset, slpm);
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__nmk_gpio_set_mode(nmk_chip, offset, af);
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}
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@ -519,12 +544,8 @@ static void nmk_gpio_set_output(struct gpio_chip *chip, unsigned offset,
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{
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struct nmk_gpio_chip *nmk_chip =
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container_of(chip, struct nmk_gpio_chip, chip);
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u32 bit = 1 << offset;
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if (val)
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writel(bit, nmk_chip->addr + NMK_GPIO_DATS);
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else
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writel(bit, nmk_chip->addr + NMK_GPIO_DATC);
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__nmk_gpio_set_output(nmk_chip, offset, val);
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}
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static int nmk_gpio_make_output(struct gpio_chip *chip, unsigned offset,
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@ -533,8 +554,7 @@ static int nmk_gpio_make_output(struct gpio_chip *chip, unsigned offset,
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struct nmk_gpio_chip *nmk_chip =
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container_of(chip, struct nmk_gpio_chip, chip);
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writel(1 << offset, nmk_chip->addr + NMK_GPIO_DIRS);
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nmk_gpio_set_output(chip, offset, val);
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__nmk_gpio_make_output(nmk_chip, offset, val);
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return 0;
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}
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@ -19,12 +19,16 @@
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* bit 9..10 - Alternate Function Selection
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* bit 11..12 - Pull up/down state
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* bit 13 - Sleep mode behaviour
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* bit 14 - (sleep mode) Direction
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* bit 15 - (sleep mode) Value (if output)
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*
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* to facilitate the definition, the following macros are provided
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*
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* PIN_CFG_DEFAULT - default config (0):
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* pull up/down = disabled
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* sleep mode = input/wakeup
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* (sleep mode) direction = input
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* (sleep mode) value = low
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*
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* PIN_CFG - default config with alternate function
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* PIN_CFG_PULL - default config with alternate function and pull up/down
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@ -53,12 +57,37 @@ typedef unsigned long pin_cfg_t;
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#define PIN_SLPM_SHIFT 13
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#define PIN_SLPM_MASK (0x1 << PIN_SLPM_SHIFT)
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#define PIN_SLPM(x) (((x) & PIN_SLPM_MASK) >> PIN_SLPM_SHIFT)
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#define PIN_SLPM_INPUT (NMK_GPIO_SLPM_INPUT << PIN_SLPM_SHIFT)
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#define PIN_SLPM_MAKE_INPUT (NMK_GPIO_SLPM_INPUT << PIN_SLPM_SHIFT)
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#define PIN_SLPM_NOCHANGE (NMK_GPIO_SLPM_NOCHANGE << PIN_SLPM_SHIFT)
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/* These two replace the above in DB8500v2+ */
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#define PIN_SLPM_WAKEUP_ENABLE (NMK_GPIO_SLPM_WAKEUP_ENABLE << PIN_SLPM_SHIFT)
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#define PIN_SLPM_WAKEUP_DISABLE (NMK_GPIO_SLPM_WAKEUP_DISABLE << PIN_SLPM_SHIFT)
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#define PIN_DIR_SHIFT 14
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#define PIN_DIR_MASK (0x1 << PIN_DIR_SHIFT)
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#define PIN_DIR(x) (((x) & PIN_DIR_MASK) >> PIN_DIR_SHIFT)
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#define PIN_DIR_INPUT (0 << PIN_DIR_SHIFT)
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#define PIN_DIR_OUTPUT (1 << PIN_DIR_SHIFT)
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#define PIN_VAL_SHIFT 15
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#define PIN_VAL_MASK (0x1 << PIN_VAL_SHIFT)
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#define PIN_VAL(x) (((x) & PIN_VAL_MASK) >> PIN_VAL_SHIFT)
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#define PIN_VAL_LOW (0 << PIN_VAL_SHIFT)
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#define PIN_VAL_HIGH (1 << PIN_VAL_SHIFT)
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/* Shortcuts. Use these instead of separate DIR and VAL. */
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#define PIN_INPUT PIN_DIR_INPUT
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#define PIN_OUTPUT_LOW (PIN_DIR_OUTPUT | PIN_VAL_LOW)
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#define PIN_OUTPUT_HIGH (PIN_DIR_OUTPUT | PIN_VAL_HIGH)
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/*
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* These are the same as the ones above, but should make more sense to the
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* reader when seen along with a setting a pin to AF mode.
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*/
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#define PIN_SLPM_INPUT PIN_INPUT
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#define PIN_SLPM_OUTPUT_LOW PIN_OUTPUT_LOW
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#define PIN_SLPM_OUTPUT_HIGH PIN_OUTPUT_HIGH
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#define PIN_CFG_DEFAULT (PIN_PULL_NONE | PIN_SLPM_INPUT)
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#define PIN_CFG(num, alt) \
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