| Message ID | 1360602659-4774-7-git-send-email-haojian.zhuang@linaro.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
* Haojian Zhuang <haojian.zhuang@linaro.org> [130211 09:15]: > Since gpio driver could create gpio range in DTS, it could invokes > pinctrl_request_gpio(). In the pinctrl-single driver, it needs to > configure pins with gpio function mode. Minor typo above: s/invokes/invoke/ > A new gpio function range should be created in DTS file in below. > > pinctrl-single,gpio-range = <phandle pin_offset nr_pins gpio_func>; > > range: gpio-range { > #pinctrl-single,gpio-range-cells = <3>; > }; > > The gpio-ranges property is used in gpio driver and the > pinctrl-single,gpio-range property is used in pinctrl-single driver. > > 1. gpio-ranges = <phandle gpio_offset_in_chip pin_offset nr_pins> > gpio-ranges = < &pmx0 0 89 1 &pmx0 1 89 1 &pmx0 2 90 1 > &pmx0 3 90 1 &pmx0 4 91 1 &pmx0 5 92 1>; I think the second gpio-ranges above should be really pinctr-single,gpio-range instead of gpio-ranges? > 2. gpio driver could get pin offset from gpio-ranges property. > pinctrl-single driver could get gpio function mode from gpio_func > that is stored in @gpiofuncs list in struct pcs_device. > This new pinctrl-single,gpio-range is used as complement for > gpio-ranges property in gpio driver. Other than that looks OK to me. Assuming the other related GPIO patches are fine and don't cause changes to this: Acked-by: Tony Lindgren <tony@atomide.com>
On Mon, Feb 11, 2013 at 6:10 PM, Haojian Zhuang <haojian.zhuang@linaro.org> wrote: > Since gpio driver could create gpio range in DTS, it could invokes > pinctrl_request_gpio(). In the pinctrl-single driver, it needs to > configure pins with gpio function mode. Is it OK if I wait with patches 6-12 while we sort out the first 5? Yours, Linus Walleij
On 14 February 2013 23:24, Linus Walleij <linus.walleij@linaro.org> wrote: > On Mon, Feb 11, 2013 at 6:10 PM, Haojian Zhuang > <haojian.zhuang@linaro.org> wrote: > >> Since gpio driver could create gpio range in DTS, it could invokes >> pinctrl_request_gpio(). In the pinctrl-single driver, it needs to >> configure pins with gpio function mode. > > Is it OK if I wait with patches 6-12 while we sort out the first > 5? > > Yours, > Linus Walleij Since Tony has some comments on dropping BIAS_AUTO_PULL, I'll send the v9 including your comments. Regards Haojian
On 14 February 2013 02:39, Tony Lindgren <tony@atomide.com> wrote: > * Haojian Zhuang <haojian.zhuang@linaro.org> [130211 09:15]: >> Since gpio driver could create gpio range in DTS, it could invokes >> pinctrl_request_gpio(). In the pinctrl-single driver, it needs to >> configure pins with gpio function mode. > > Minor typo above: s/invokes/invoke/ > I'll fix it. >> A new gpio function range should be created in DTS file in below. >> >> pinctrl-single,gpio-range = <phandle pin_offset nr_pins gpio_func>; >> >> range: gpio-range { >> #pinctrl-single,gpio-range-cells = <3>; >> }; >> >> The gpio-ranges property is used in gpio driver and the >> pinctrl-single,gpio-range property is used in pinctrl-single driver. >> >> 1. gpio-ranges = <phandle gpio_offset_in_chip pin_offset nr_pins> >> gpio-ranges = < &pmx0 0 89 1 &pmx0 1 89 1 &pmx0 2 90 1 >> &pmx0 3 90 1 &pmx0 4 91 1 &pmx0 5 92 1>; > > I think the second gpio-ranges above should be really > pinctr-single,gpio-range instead of gpio-ranges? > No, it's not pinctrl-single,gpio-range property. I list both two properties are here, since I need to explain the difference between gpio-ranges & pinctrl-single,gpio-range. Thanks Haojian >> 2. gpio driver could get pin offset from gpio-ranges property. >> pinctrl-single driver could get gpio function mode from gpio_func >> that is stored in @gpiofuncs list in struct pcs_device. >> This new pinctrl-single,gpio-range is used as complement for >> gpio-ranges property in gpio driver. > > Other than that looks OK to me. Assuming the other related GPIO patches > are fine and don't cause changes to this: > > Acked-by: Tony Lindgren <tony@atomide.com>
diff --git a/drivers/pinctrl/pinctrl-single.c b/drivers/pinctrl/pinctrl-single.c index 5c32e88..8b9dd95 100644 --- a/drivers/pinctrl/pinctrl-single.c +++ b/drivers/pinctrl/pinctrl-single.c @@ -77,6 +77,20 @@ struct pcs_function { }; /** + * struct pcs_gpiofunc_range - pin ranges with same mux value of gpio function + * @offset: offset base of pins + * @npins: number pins with the same mux value of gpio function + * @gpiofunc: mux value of gpio function + * @node: list node + */ +struct pcs_gpiofunc_range { + unsigned offset; + unsigned npins; + unsigned gpiofunc; + struct list_head node; +}; + +/** * struct pcs_data - wrapper for data needed by pinctrl framework * @pa: pindesc array * @cur: index to current element @@ -123,6 +137,7 @@ struct pcs_name { * @ftree: function index radix tree * @pingroups: list of pingroups * @functions: list of functions + * @gpiofuncs: list of gpio functions * @ngroups: number of pingroups * @nfuncs: number of functions * @desc: pin controller descriptor @@ -148,6 +163,7 @@ struct pcs_device { struct radix_tree_root ftree; struct list_head pingroups; struct list_head functions; + struct list_head gpiofuncs; unsigned ngroups; unsigned nfuncs; struct pinctrl_desc desc; @@ -403,9 +419,26 @@ static void pcs_disable(struct pinctrl_dev *pctldev, unsigned fselector, } static int pcs_request_gpio(struct pinctrl_dev *pctldev, - struct pinctrl_gpio_range *range, unsigned offset) + struct pinctrl_gpio_range *range, unsigned pin) { - return -ENOTSUPP; + struct pcs_device *pcs = pinctrl_dev_get_drvdata(pctldev); + struct pcs_gpiofunc_range *frange = NULL; + struct list_head *pos, *tmp; + int mux_bytes = 0; + unsigned data; + + list_for_each_safe(pos, tmp, &pcs->gpiofuncs) { + frange = list_entry(pos, struct pcs_gpiofunc_range, node); + if (pin >= frange->offset + frange->npins + || pin < frange->offset) + continue; + mux_bytes = pcs->width / BITS_PER_BYTE; + data = pcs->read(pcs->base + pin * mux_bytes) & ~pcs->fmask; + data |= frange->gpiofunc; + pcs->write(data, pcs->base + pin * mux_bytes); + break; + } + return 0; } static struct pinmux_ops pcs_pinmux_ops = { @@ -879,6 +912,37 @@ static void pcs_free_resources(struct pcs_device *pcs) static struct of_device_id pcs_of_match[]; +static int pcs_add_gpio_func(struct device_node *node, struct pcs_device *pcs) +{ + const char *propname = "pinctrl-single,gpio-range"; + const char *cellname = "#pinctrl-single,gpio-range-cells"; + struct of_phandle_args gpiospec; + struct pcs_gpiofunc_range *range; + int ret, i; + + for (i = 0; ; i++) { + ret = of_parse_phandle_with_args(node, propname, cellname, + i, &gpiospec); + /* Do not treat it as error. Only treat it as end condition. */ + if (ret) { + ret = 0; + break; + } + range = devm_kzalloc(pcs->dev, sizeof(*range), GFP_KERNEL); + if (!range) { + ret = -ENOMEM; + break; + } + range->offset = gpiospec.args[0]; + range->npins = gpiospec.args[1]; + range->gpiofunc = gpiospec.args[2]; + mutex_lock(&pcs->mutex); + list_add_tail(&range->node, &pcs->gpiofuncs); + mutex_unlock(&pcs->mutex); + } + return ret; +} + static int pcs_probe(struct platform_device *pdev) { struct device_node *np = pdev->dev.of_node; @@ -900,6 +964,7 @@ static int pcs_probe(struct platform_device *pdev) mutex_init(&pcs->mutex); INIT_LIST_HEAD(&pcs->pingroups); INIT_LIST_HEAD(&pcs->functions); + INIT_LIST_HEAD(&pcs->gpiofuncs); PCS_GET_PROP_U32("pinctrl-single,register-width", &pcs->width, "register width not specified\n"); @@ -975,6 +1040,10 @@ static int pcs_probe(struct platform_device *pdev) goto free; } + ret = pcs_add_gpio_func(np, pcs); + if (ret < 0) + goto free; + dev_info(pcs->dev, "%i pins at pa %p size %u\n", pcs->desc.npins, pcs->base, pcs->size);
Since gpio driver could create gpio range in DTS, it could invokes pinctrl_request_gpio(). In the pinctrl-single driver, it needs to configure pins with gpio function mode. A new gpio function range should be created in DTS file in below. pinctrl-single,gpio-range = <phandle pin_offset nr_pins gpio_func>; range: gpio-range { #pinctrl-single,gpio-range-cells = <3>; }; The gpio-ranges property is used in gpio driver and the pinctrl-single,gpio-range property is used in pinctrl-single driver. 1. gpio-ranges = <phandle gpio_offset_in_chip pin_offset nr_pins> gpio-ranges = < &pmx0 0 89 1 &pmx0 1 89 1 &pmx0 2 90 1 &pmx0 3 90 1 &pmx0 4 91 1 &pmx0 5 92 1>; 2. gpio driver could get pin offset from gpio-ranges property. pinctrl-single driver could get gpio function mode from gpio_func that is stored in @gpiofuncs list in struct pcs_device. This new pinctrl-single,gpio-range is used as complement for gpio-ranges property in gpio driver. Signed-off-by: Haojian Zhuang <haojian.zhuang@linaro.org> --- drivers/pinctrl/pinctrl-single.c | 73 ++++++++++++++++++++++++++++++++++++-- 1 file changed, 71 insertions(+), 2 deletions(-)