summaryrefslogtreecommitdiff
path: root/drivers/pinctrl/stm32
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2016-05-19 22:50:56 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2016-05-19 22:50:56 +0300
commita37571a29eca963562ff5a9233db4a5c73c72cf9 (patch)
treeec78d4b5b905f32bc541b2faa5b89f88967cf990 /drivers/pinctrl/stm32
parenta0d3c7c5c07cfbe00ab89438ddf82482f5a99422 (diff)
parent0d5358330c20d50e52e3e65ff07a5db8007041fc (diff)
downloadlinux-a37571a29eca963562ff5a9233db4a5c73c72cf9.tar.xz
Merge tag 'pinctrl-v4.7-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl
Pull pin control updates from Linus Walleij: "This kernel cycle was quite calm when it comes to pin control and there is really just one major change, and that is the introduction of devm_pinctrl_register() managed resources. Apart from that linear development, details below. Core changes: - Add the devm_pinctrl_register() API and switch all applicable drivers to use it, saving lots of lines of code all over the place. New drivers: - driver for the Broadcom NS2 SoC - subdriver for the PXA25x SoCs - subdriver for the AMLogic Meson GXBB SoC Driver improvements: - the Intel Baytrail driver now properly supports pin control - Nomadik, Rockchip, Broadcom BCM2835 support the .get_direction() callback in the GPIO portions - continued development and stabilization of several SH-PFC SoC subdrivers: r8a7795, r8a7790, r8a7794 etc" * tag 'pinctrl-v4.7-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl: (85 commits) Revert "pinctrl: tegra: avoid parked_reg and parked_bank" pinctrl: meson: Fix eth_tx_en bit index pinctrl: tegra: avoid parked_reg and parked_bank pinctrl: tegra: Correctly check the supported configuration pinctrl: amlogic: Add support for Amlogic Meson GXBB SoC pinctrl: rockchip: fix pull setting error for rk3399 pinctrl: stm32: Implement .pin_config_dbg_show() pinctrl: nomadik: hide nmk_gpio_get_mode when unused pinctrl: ns2: rename pinctrl_utils_dt_free_map pinctrl: at91: Merge clk_prepare and clk_enable into clk_prepare_enable pinctrl: at91: Make at91_gpio_template const pinctrl: baytrail: fix some error handling in debugfs pinctrl: ns2: add pinmux driver support for Broadcom NS2 SoC pinctrl: sirf/atlas7: trivial fix of spelling mistake on flagged pinctrl: sh-pfc: Kill unused variable in sh_pfc_remove() pinctrl: nomadik: implement .get_direction() pinctrl: nomadik: use BIT() with offsets consequently pinctrl: exynos5440: Use off-stack memory for pinctrl_gpio_range pinctrl: zynq: Use devm_pinctrl_register() for pinctrl registration pinctrl: u300: Use devm_pinctrl_register() for pinctrl registration ...
Diffstat (limited to 'drivers/pinctrl/stm32')
-rw-r--r--drivers/pinctrl/stm32/pinctrl-stm32.c185
1 files changed, 180 insertions, 5 deletions
diff --git a/drivers/pinctrl/stm32/pinctrl-stm32.c b/drivers/pinctrl/stm32/pinctrl-stm32.c
index 8deb566ed4cd..ae9fab82a1b9 100644
--- a/drivers/pinctrl/stm32/pinctrl-stm32.c
+++ b/drivers/pinctrl/stm32/pinctrl-stm32.c
@@ -358,7 +358,7 @@ static int stm32_pctrl_dt_node_to_map(struct pinctrl_dev *pctldev,
ret = stm32_pctrl_dt_subnode_to_map(pctldev, np, map,
&reserved_maps, num_maps);
if (ret < 0) {
- pinctrl_utils_dt_free_map(pctldev, *map, *num_maps);
+ pinctrl_utils_free_map(pctldev, *map, *num_maps);
return ret;
}
}
@@ -396,7 +396,7 @@ static int stm32_pctrl_get_group_pins(struct pinctrl_dev *pctldev,
static const struct pinctrl_ops stm32_pctrl_ops = {
.dt_node_to_map = stm32_pctrl_dt_node_to_map,
- .dt_free_map = pinctrl_utils_dt_free_map,
+ .dt_free_map = pinctrl_utils_free_map,
.get_groups_count = stm32_pctrl_get_groups_count,
.get_group_name = stm32_pctrl_get_group_name,
.get_group_pins = stm32_pctrl_get_group_pins,
@@ -454,6 +454,29 @@ static void stm32_pmx_set_mode(struct stm32_gpio_bank *bank,
clk_disable(bank->clk);
}
+static void stm32_pmx_get_mode(struct stm32_gpio_bank *bank,
+ int pin, u32 *mode, u32 *alt)
+{
+ u32 val;
+ int alt_shift = (pin % 8) * 4;
+ int alt_offset = STM32_GPIO_AFRL + (pin / 8) * 4;
+ unsigned long flags;
+
+ clk_enable(bank->clk);
+ spin_lock_irqsave(&bank->lock, flags);
+
+ val = readl_relaxed(bank->base + alt_offset);
+ val &= GENMASK(alt_shift + 3, alt_shift);
+ *alt = val >> alt_shift;
+
+ val = readl_relaxed(bank->base + STM32_GPIO_MODER);
+ val &= GENMASK(pin * 2 + 1, pin * 2);
+ *mode = val >> (pin * 2);
+
+ spin_unlock_irqrestore(&bank->lock, flags);
+ clk_disable(bank->clk);
+}
+
static int stm32_pmx_set_mux(struct pinctrl_dev *pctldev,
unsigned function,
unsigned group)
@@ -525,6 +548,24 @@ static void stm32_pconf_set_driving(struct stm32_gpio_bank *bank,
clk_disable(bank->clk);
}
+static u32 stm32_pconf_get_driving(struct stm32_gpio_bank *bank,
+ unsigned int offset)
+{
+ unsigned long flags;
+ u32 val;
+
+ clk_enable(bank->clk);
+ spin_lock_irqsave(&bank->lock, flags);
+
+ val = readl_relaxed(bank->base + STM32_GPIO_TYPER);
+ val &= BIT(offset);
+
+ spin_unlock_irqrestore(&bank->lock, flags);
+ clk_disable(bank->clk);
+
+ return (val >> offset);
+}
+
static void stm32_pconf_set_speed(struct stm32_gpio_bank *bank,
unsigned offset, u32 speed)
{
@@ -543,6 +584,24 @@ static void stm32_pconf_set_speed(struct stm32_gpio_bank *bank,
clk_disable(bank->clk);
}
+static u32 stm32_pconf_get_speed(struct stm32_gpio_bank *bank,
+ unsigned int offset)
+{
+ unsigned long flags;
+ u32 val;
+
+ clk_enable(bank->clk);
+ spin_lock_irqsave(&bank->lock, flags);
+
+ val = readl_relaxed(bank->base + STM32_GPIO_SPEEDR);
+ val &= GENMASK(offset * 2 + 1, offset * 2);
+
+ spin_unlock_irqrestore(&bank->lock, flags);
+ clk_disable(bank->clk);
+
+ return (val >> (offset * 2));
+}
+
static void stm32_pconf_set_bias(struct stm32_gpio_bank *bank,
unsigned offset, u32 bias)
{
@@ -561,6 +620,57 @@ static void stm32_pconf_set_bias(struct stm32_gpio_bank *bank,
clk_disable(bank->clk);
}
+static u32 stm32_pconf_get_bias(struct stm32_gpio_bank *bank,
+ unsigned int offset)
+{
+ unsigned long flags;
+ u32 val;
+
+ clk_enable(bank->clk);
+ spin_lock_irqsave(&bank->lock, flags);
+
+ val = readl_relaxed(bank->base + STM32_GPIO_PUPDR);
+ val &= GENMASK(offset * 2 + 1, offset * 2);
+
+ spin_unlock_irqrestore(&bank->lock, flags);
+ clk_disable(bank->clk);
+
+ return (val >> (offset * 2));
+}
+
+static bool stm32_pconf_input_get(struct stm32_gpio_bank *bank,
+ unsigned int offset)
+{
+ unsigned long flags;
+ u32 val;
+
+ clk_enable(bank->clk);
+ spin_lock_irqsave(&bank->lock, flags);
+
+ val = !!(readl_relaxed(bank->base + STM32_GPIO_IDR) & BIT(offset));
+
+ spin_unlock_irqrestore(&bank->lock, flags);
+ clk_disable(bank->clk);
+
+ return val;
+}
+
+static bool stm32_pconf_output_get(struct stm32_gpio_bank *bank,
+ unsigned int offset)
+{
+ unsigned long flags;
+ u32 val;
+
+ clk_enable(bank->clk);
+ spin_lock_irqsave(&bank->lock, flags);
+ val = !!(readl_relaxed(bank->base + STM32_GPIO_ODR) & BIT(offset));
+
+ spin_unlock_irqrestore(&bank->lock, flags);
+ clk_disable(bank->clk);
+
+ return val;
+}
+
static int stm32_pconf_parse_conf(struct pinctrl_dev *pctldev,
unsigned int pin, enum pin_config_param param,
enum pin_config_param arg)
@@ -634,9 +744,73 @@ static int stm32_pconf_group_set(struct pinctrl_dev *pctldev, unsigned group,
return 0;
}
+static void stm32_pconf_dbg_show(struct pinctrl_dev *pctldev,
+ struct seq_file *s,
+ unsigned int pin)
+{
+ struct pinctrl_gpio_range *range;
+ struct stm32_gpio_bank *bank;
+ int offset;
+ u32 mode, alt, drive, speed, bias;
+ static const char * const modes[] = {
+ "input", "output", "alternate", "analog" };
+ static const char * const speeds[] = {
+ "low", "medium", "high", "very high" };
+ static const char * const biasing[] = {
+ "floating", "pull up", "pull down", "" };
+ bool val;
+
+ range = pinctrl_find_gpio_range_from_pin_nolock(pctldev, pin);
+ bank = gpio_range_to_bank(range);
+ offset = stm32_gpio_pin(pin);
+
+ stm32_pmx_get_mode(bank, offset, &mode, &alt);
+ bias = stm32_pconf_get_bias(bank, offset);
+
+ seq_printf(s, "%s ", modes[mode]);
+
+ switch (mode) {
+ /* input */
+ case 0:
+ val = stm32_pconf_input_get(bank, offset);
+ seq_printf(s, "- %s - %s",
+ val ? "high" : "low",
+ biasing[bias]);
+ break;
+
+ /* output */
+ case 1:
+ drive = stm32_pconf_get_driving(bank, offset);
+ speed = stm32_pconf_get_speed(bank, offset);
+ val = stm32_pconf_output_get(bank, offset);
+ seq_printf(s, "- %s - %s - %s - %s %s",
+ val ? "high" : "low",
+ drive ? "open drain" : "push pull",
+ biasing[bias],
+ speeds[speed], "speed");
+ break;
+
+ /* alternate */
+ case 2:
+ drive = stm32_pconf_get_driving(bank, offset);
+ speed = stm32_pconf_get_speed(bank, offset);
+ seq_printf(s, "%d - %s - %s - %s %s", alt,
+ drive ? "open drain" : "push pull",
+ biasing[bias],
+ speeds[speed], "speed");
+ break;
+
+ /* analog */
+ case 3:
+ break;
+ }
+}
+
+
static const struct pinconf_ops stm32_pconf_ops = {
.pin_config_group_get = stm32_pconf_group_get,
.pin_config_group_set = stm32_pconf_group_set,
+ .pin_config_dbg_show = stm32_pconf_dbg_show,
};
static int stm32_gpiolib_register_bank(struct stm32_pinctrl *pctl,
@@ -813,10 +987,11 @@ int stm32_pctl_probe(struct platform_device *pdev)
pctl->pctl_desc.pmxops = &stm32_pmx_ops;
pctl->dev = &pdev->dev;
- pctl->pctl_dev = pinctrl_register(&pctl->pctl_desc, &pdev->dev, pctl);
- if (!pctl->pctl_dev) {
+ pctl->pctl_dev = devm_pinctrl_register(&pdev->dev, &pctl->pctl_desc,
+ pctl);
+ if (IS_ERR(pctl->pctl_dev)) {
dev_err(&pdev->dev, "Failed pinctrl registration\n");
- return -EINVAL;
+ return PTR_ERR(pctl->pctl_dev);
}
for (i = 0; i < pctl->nbanks; i++)