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Message-ID: <1485533721-9019-3-git-send-email-alexandre.torgue@st.com>
Date: Fri, 27 Jan 2017 17:15:15 +0100
From: Alexandre TORGUE <alexandre.torgue@...com>
To: Maxime Coquelin <mcoquelin.stm32@...il.com>,
Linus Walleij <linus.walleij@...aro.org>,
Rob Herring <robh+dt@...nel.org>,
Mark Rutland <mark.rutland@....com>,
Arnd Bergmann <arnd@...db.de>,
Russell King <linux@...linux.org.uk>,
Olof Johansson <olof@...om.net>,
Patrice Chotard <patrice.chotard@...com>,
<lee.jones@...aro.org>
CC: <linux-arm-kernel@...ts.infradead.org>,
<devicetree@...r.kernel.org>, <linux-gpio@...r.kernel.org>,
<linux-kernel@...r.kernel.org>
Subject: [PATCH 2/8] pinctrl: stm32: use gpio-ranges to declare bank range
Use device tree entries to declare gpio range. It will allow to use
no contiguous gpio bank and holes inside a bank.
Signed-off-by: Alexandre TORGUE <alexandre.torgue@...com>
diff --git a/drivers/pinctrl/stm32/pinctrl-stm32.c b/drivers/pinctrl/stm32/pinctrl-stm32.c
index b145431..d0a968a 100644
--- a/drivers/pinctrl/stm32/pinctrl-stm32.c
+++ b/drivers/pinctrl/stm32/pinctrl-stm32.c
@@ -589,7 +589,7 @@ static int stm32_pmx_set_mux(struct pinctrl_dev *pctldev,
}
range = pinctrl_find_gpio_range_from_pin(pctldev, g->pin);
- bank = gpio_range_to_bank(range);
+ bank = gpiochip_get_data(range->gc);
pin = stm32_gpio_pin(g->pin);
mode = stm32_gpio_get_mode(function);
@@ -604,7 +604,7 @@ static int stm32_pmx_gpio_set_direction(struct pinctrl_dev *pctldev,
struct pinctrl_gpio_range *range, unsigned gpio,
bool input)
{
- struct stm32_gpio_bank *bank = gpio_range_to_bank(range);
+ struct stm32_gpio_bank *bank = gpiochip_get_data(range->gc);
int pin = stm32_gpio_pin(gpio);
stm32_pmx_set_mode(bank, pin, !input, 0);
@@ -761,7 +761,7 @@ static int stm32_pconf_parse_conf(struct pinctrl_dev *pctldev,
int offset, ret = 0;
range = pinctrl_find_gpio_range_from_pin(pctldev, pin);
- bank = gpio_range_to_bank(range);
+ bank = gpiochip_get_data(range->gc);
offset = stm32_gpio_pin(pin);
switch (param) {
@@ -842,7 +842,7 @@ static void stm32_pconf_dbg_show(struct pinctrl_dev *pctldev,
bool val;
range = pinctrl_find_gpio_range_from_pin_nolock(pctldev, pin);
- bank = gpio_range_to_bank(range);
+ bank = gpiochip_get_data(range->gc);
offset = stm32_gpio_pin(pin);
stm32_pmx_get_mode(bank, offset, &mode, &alt);
@@ -900,10 +900,12 @@ static int stm32_gpiolib_register_bank(struct stm32_pinctrl *pctl,
int bank_nr = pctl->nbanks;
struct stm32_gpio_bank *bank = &pctl->banks[bank_nr];
struct pinctrl_gpio_range *range = &bank->range;
+ struct of_phandle_args args;
struct device *dev = pctl->dev;
struct resource res;
struct reset_control *rstc;
- int err, npins;
+ unsigned int npins;
+ int err;
rstc = of_reset_control_get(np, NULL);
if (!IS_ERR(rstc))
@@ -928,28 +930,32 @@ static int stm32_gpiolib_register_bank(struct stm32_pinctrl *pctl,
return err;
}
- npins = pctl->match_data->npins;
- npins -= bank_nr * STM32_GPIO_PINS_PER_BANK;
- if (npins < 0)
- return -EINVAL;
- else if (npins > STM32_GPIO_PINS_PER_BANK)
+ if (of_property_read_u32(np, "ngpios", &npins))
npins = STM32_GPIO_PINS_PER_BANK;
bank->gpio_chip = stm32_gpio_template;
+
+ of_property_read_string(np, "st,bank-name", &bank->gpio_chip.label);
+
+ if (!of_parse_phandle_with_fixed_args(np, "gpio-ranges", 3, 0, &args))
+ bank_nr = args.args[1] / STM32_GPIO_PINS_PER_BANK;
+ else {
+ range->name = bank->gpio_chip.label;
+ range->id = bank_nr;
+ range->pin_base = range->id * STM32_GPIO_PINS_PER_BANK;
+ range->base = range->id * STM32_GPIO_PINS_PER_BANK;
+ range->npins = npins;
+ range->gc = &bank->gpio_chip;
+ pinctrl_add_gpio_range(pctl->pctl_dev,
+ &pctl->banks[bank_nr].range);
+ }
+
bank->gpio_chip.base = bank_nr * STM32_GPIO_PINS_PER_BANK;
bank->gpio_chip.ngpio = npins;
bank->gpio_chip.of_node = np;
bank->gpio_chip.parent = dev;
spin_lock_init(&bank->lock);
- of_property_read_string(np, "st,bank-name", &range->name);
- bank->gpio_chip.label = range->name;
-
- range->id = bank_nr;
- range->pin_base = range->base = range->id * STM32_GPIO_PINS_PER_BANK;
- range->npins = bank->gpio_chip.ngpio;
- range->gc = &bank->gpio_chip;
-
/* create irq hierarchical domain */
bank->fwnode = of_node_to_fwnode(np);
@@ -966,7 +972,7 @@ static int stm32_gpiolib_register_bank(struct stm32_pinctrl *pctl,
return err;
}
- dev_info(dev, "%s bank added\n", range->name);
+ dev_info(dev, "%s bank added\n", bank->gpio_chip.label);
return 0;
}
@@ -1085,30 +1091,6 @@ int stm32_pctl_probe(struct platform_device *pdev)
return ret;
}
- for_each_child_of_node(np, child)
- if (of_property_read_bool(child, "gpio-controller"))
- banks++;
-
- if (!banks) {
- dev_err(dev, "at least one GPIO bank is required\n");
- return -EINVAL;
- }
-
- pctl->banks = devm_kcalloc(dev, banks, sizeof(*pctl->banks),
- GFP_KERNEL);
- if (!pctl->banks)
- return -ENOMEM;
-
- for_each_child_of_node(np, child) {
- if (of_property_read_bool(child, "gpio-controller")) {
- ret = stm32_gpiolib_register_bank(pctl, child);
- if (ret)
- return ret;
-
- pctl->nbanks++;
- }
- }
-
pins = devm_kcalloc(&pdev->dev, pctl->match_data->npins, sizeof(*pins),
GFP_KERNEL);
if (!pins)
@@ -1133,8 +1115,28 @@ int stm32_pctl_probe(struct platform_device *pdev)
return PTR_ERR(pctl->pctl_dev);
}
- for (i = 0; i < pctl->nbanks; i++)
- pinctrl_add_gpio_range(pctl->pctl_dev, &pctl->banks[i].range);
+ for_each_child_of_node(np, child)
+ if (of_property_read_bool(child, "gpio-controller"))
+ banks++;
+
+ if (!banks) {
+ dev_err(dev, "at least one GPIO bank is required\n");
+ return -EINVAL;
+ }
+ pctl->banks = devm_kcalloc(dev, banks, sizeof(*pctl->banks),
+ GFP_KERNEL);
+ if (!pctl->banks)
+ return -ENOMEM;
+
+ for_each_child_of_node(np, child) {
+ if (of_property_read_bool(child, "gpio-controller")) {
+ ret = stm32_gpiolib_register_bank(pctl, child);
+ if (ret)
+ return ret;
+
+ pctl->nbanks++;
+ }
+ }
dev_info(dev, "Pinctrl STM32 initialized\n");
--
1.9.1
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