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author | Linus Torvalds <torvalds@linux-foundation.org> | 2016-05-19 21:50:56 +0200 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-05-19 21:50:56 +0200 |
commit | a37571a29eca963562ff5a9233db4a5c73c72cf9 (patch) | |
tree | ec78d4b5b905f32bc541b2faa5b89f88967cf990 /drivers/pinctrl/stm32 | |
parent | Merge tag 'dmaengine-4.7-rc1' of git://git.infradead.org/users/vkoul/slave-dma (diff) | |
parent | Revert "pinctrl: tegra: avoid parked_reg and parked_bank" (diff) | |
download | linux-a37571a29eca963562ff5a9233db4a5c73c72cf9.tar.xz linux-a37571a29eca963562ff5a9233db4a5c73c72cf9.zip |
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.c | 185 |
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++) |