diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2016-01-17 23:32:01 +0300 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-01-17 23:32:01 +0300 |
commit | 58cf279acac3080ce03eeea5ca268210b3165fe1 (patch) | |
tree | 54997706fbfea2cd9fd4c4044edbd8ecdc154dfb /drivers/pinctrl/nomadik/pinctrl-abx500.c | |
parent | 6606b342febfd470b4a33acb73e360eeaca1d9bb (diff) | |
parent | c474e348778bdf5b453a2cdff4b2b1f9e000f343 (diff) | |
download | linux-58cf279acac3080ce03eeea5ca268210b3165fe1.tar.xz |
Merge tag 'gpio-v4.5-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio
Pull GPIO updates from Linus Walleij:
"Here is the bulk of GPIO changes for v4.5.
Notably there are big refactorings mostly by myself, aimed at getting
the gpio_chip into a shape that makes me believe I can proceed to
preserve state for a proper userspace ABI (character device) that has
already been proposed once, but resulted in the feedback that I need
to go back and restructure stuff. So I've been restructuring stuff.
On the way I ran into brokenness (return code from the get_value()
callback) and had to fix it. Also, refactored generic GPIO to be
simpler.
Some of that is still waiting to trickle down from the subsystems all
over the kernel that provide random gpio_chips, I've touched every
single GPIO driver in the kernel now, oh man I didn't know I was
responsible for so much...
Apart from that we're churning along as usual.
I took some effort to test and retest so it should merge nicely and we
shook out a couple of bugs in -next.
Infrastructural changes:
- In struct gpio_chip, rename the .dev node to .parent to better
reflect the fact that this is not the GPIO struct device
abstraction. We will add that soon so this would be totallt
confusing.
- It was noted that the driver .get_value() callbacks was sometimes
reporting negative -ERR values to the gpiolib core, expecting them
to be propagated to consumer gpiod_get_value() and gpio_get_value()
calls. This was not happening, so as there was a mess of drivers
returning negative errors and some returning "anything else than
zero" to indicate that a line was active. As some would have bit
31 set to indicate "line active" it clashed with negative error
codes. This is fixed by the largeish series clamping values in all
drivers with !!value to [0,1] and then augmenting the code to
propagate error codes to consumers. (Includes some ACKed patches
in other subsystems.)
- Add a void *data pointer to struct gpio_chip. The container_of()
design pattern is indeed very nice, but we want to reform the
struct gpio_chip to be a non-volative, stateless business, and keep
states internal to the gpiolib to be able to hold on to the state
when adding a proper userspace ABI (character device) further down
the road. To achieve this, drivers need a handle at the internal
state that is not dependent on their struct gpio_chip() so we add
gpiochip_add_data() and gpiochip_get_data() following the pattern
of many other subsystems. All the "use gpiochip data pointer"
patches transforms drivers to this scheme.
- The Generic GPIO chip header has been merged into the general
<linux/gpio/driver.h> header, and the custom header for that
removed. Instead of having a separate mm_gpio_chip struct for
these generic drivers, merge that into struct gpio_chip,
simplifying the code and removing the need for separate and
confusing includes.
Misc improvements:
- Stabilize the way GPIOs are looked up from the ACPI legacy
specification.
- Incremental driver features for PXA, PCA953X, Lantiq (patches from
the OpenWRT community), RCAR, Zynq, PL061, 104-idi-48
New drivers:
- Add a GPIO chip to the ALSA SoC AC97 driver.
- Add a new Broadcom NSP SoC driver (this lands in the pinctrl dir,
but the branch is merged here too to account for infrastructural
changes).
- The sx150x driver now supports the sx1502"
* tag 'gpio-v4.5-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: (220 commits)
gpio: generic: make bgpio_pdata always visible
gpiolib: fix chip order in gpio list
gpio: mpc8xxx: Do not use gpiochip_get_data() in mpc8xxx_gpio_save_regs()
gpio: mm-lantiq: Do not use gpiochip_get_data() in ltq_mm_save_regs()
gpio: brcmstb: Allow building driver for BMIPS_GENERIC
gpio: brcmstb: Set endian flags for big-endian MIPS
gpio: moxart: fix build regression
gpio: xilinx: Do not use gpiochip_get_data() in xgpio_save_regs()
leds: pca9532: use gpiochip data pointer
leds: tca6507: use gpiochip data pointer
hid: cp2112: use gpiochip data pointer
bcma: gpio: use gpiochip data pointer
avr32: gpio: use gpiochip data pointer
video: fbdev: via: use gpiochip data pointer
gpio: pch: Optimize pch_gpio_get()
Revert "pinctrl: lantiq: Implement gpio_chip.to_irq"
pinctrl: nsp-gpio: use gpiochip data pointer
pinctrl: vt8500-wmt: use gpiochip data pointer
pinctrl: exynos5440: use gpiochip data pointer
pinctrl: at91-pio4: use gpiochip data pointer
...
Diffstat (limited to 'drivers/pinctrl/nomadik/pinctrl-abx500.c')
-rw-r--r-- | drivers/pinctrl/nomadik/pinctrl-abx500.c | 34 |
1 files changed, 13 insertions, 21 deletions
diff --git a/drivers/pinctrl/nomadik/pinctrl-abx500.c b/drivers/pinctrl/nomadik/pinctrl-abx500.c index b59fbb4b1fb1..085e60106ec2 100644 --- a/drivers/pinctrl/nomadik/pinctrl-abx500.c +++ b/drivers/pinctrl/nomadik/pinctrl-abx500.c @@ -109,19 +109,10 @@ struct abx500_pinctrl { int irq_cluster_size; }; -/** - * to_abx500_pinctrl() - get the pointer to abx500_pinctrl - * @chip: Member of the structure abx500_pinctrl - */ -static inline struct abx500_pinctrl *to_abx500_pinctrl(struct gpio_chip *chip) -{ - return container_of(chip, struct abx500_pinctrl, chip); -} - static int abx500_gpio_get_bit(struct gpio_chip *chip, u8 reg, unsigned offset, bool *bit) { - struct abx500_pinctrl *pct = to_abx500_pinctrl(chip); + struct abx500_pinctrl *pct = gpiochip_get_data(chip); u8 pos = offset % 8; u8 val; int ret; @@ -143,7 +134,7 @@ static int abx500_gpio_get_bit(struct gpio_chip *chip, u8 reg, static int abx500_gpio_set_bits(struct gpio_chip *chip, u8 reg, unsigned offset, int val) { - struct abx500_pinctrl *pct = to_abx500_pinctrl(chip); + struct abx500_pinctrl *pct = gpiochip_get_data(chip); u8 pos = offset % 8; int ret; @@ -164,7 +155,7 @@ static int abx500_gpio_set_bits(struct gpio_chip *chip, u8 reg, */ static int abx500_gpio_get(struct gpio_chip *chip, unsigned offset) { - struct abx500_pinctrl *pct = to_abx500_pinctrl(chip); + struct abx500_pinctrl *pct = gpiochip_get_data(chip); bool bit; bool is_out; u8 gpio_offset = offset - 1; @@ -192,7 +183,7 @@ out: static void abx500_gpio_set(struct gpio_chip *chip, unsigned offset, int val) { - struct abx500_pinctrl *pct = to_abx500_pinctrl(chip); + struct abx500_pinctrl *pct = gpiochip_get_data(chip); int ret; ret = abx500_gpio_set_bits(chip, AB8500_GPIO_OUT1_REG, offset, val); @@ -272,7 +263,7 @@ out: static bool abx500_pullud_supported(struct gpio_chip *chip, unsigned gpio) { - struct abx500_pinctrl *pct = to_abx500_pinctrl(chip); + struct abx500_pinctrl *pct = gpiochip_get_data(chip); struct pullud *pullud = pct->soc->pullud; return (pullud && @@ -284,7 +275,7 @@ static int abx500_gpio_direction_output(struct gpio_chip *chip, unsigned offset, int val) { - struct abx500_pinctrl *pct = to_abx500_pinctrl(chip); + struct abx500_pinctrl *pct = gpiochip_get_data(chip); unsigned gpio; int ret; @@ -332,7 +323,7 @@ static int abx500_gpio_direction_input(struct gpio_chip *chip, unsigned offset) static int abx500_gpio_to_irq(struct gpio_chip *chip, unsigned offset) { - struct abx500_pinctrl *pct = to_abx500_pinctrl(chip); + struct abx500_pinctrl *pct = gpiochip_get_data(chip); /* The AB8500 GPIO numbers are off by one */ int gpio = offset + 1; int hwirq; @@ -634,7 +625,7 @@ static void abx500_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip) { unsigned i; unsigned gpio = chip->base; - struct abx500_pinctrl *pct = to_abx500_pinctrl(chip); + struct abx500_pinctrl *pct = gpiochip_get_data(chip); struct pinctrl_dev *pctldev = pct->pctldev; for (i = 0; i < chip->ngpio; i++, gpio++) { @@ -986,7 +977,7 @@ static int abx500_pin_config_set(struct pinctrl_dev *pctldev, param = pinconf_to_config_param(configs[i]); argument = pinconf_to_config_argument(configs[i]); - dev_dbg(chip->dev, "pin %d [%#lx]: %s %s\n", + dev_dbg(chip->parent, "pin %d [%#lx]: %s %s\n", pin, configs[i], (param == PIN_CONFIG_OUTPUT) ? "output " : "input", (param == PIN_CONFIG_OUTPUT) ? @@ -1077,7 +1068,8 @@ static int abx500_pin_config_set(struct pinctrl_dev *pctldev, break; default: - dev_err(chip->dev, "illegal configuration requested\n"); + dev_err(chip->parent, + "illegal configuration requested\n"); } } /* for each config */ out: @@ -1172,7 +1164,7 @@ static int abx500_gpio_probe(struct platform_device *pdev) pct->dev = &pdev->dev; pct->parent = dev_get_drvdata(pdev->dev.parent); pct->chip = abx500gpio_chip; - pct->chip.dev = &pdev->dev; + pct->chip.parent = &pdev->dev; pct->chip.base = -1; /* Dynamic allocation */ match = of_match_device(abx500_gpio_match, &pdev->dev); @@ -1210,7 +1202,7 @@ static int abx500_gpio_probe(struct platform_device *pdev) pct->irq_cluster = pct->soc->gpio_irq_cluster; pct->irq_cluster_size = pct->soc->ngpio_irq_cluster; - ret = gpiochip_add(&pct->chip); + ret = gpiochip_add_data(&pct->chip, pct); if (ret) { dev_err(&pdev->dev, "unable to add gpiochip: %d\n", ret); return ret; |