| Message ID | 20220111201426.326777-3-krzysztof.kozlowski@canonical.com |
|---|---|
| State | New |
| Headers | show |
| Series | pinctrl: dt-bindings: samsung: convert to dtschema | expand |
On Tue, 11 Jan 2022 at 22:15, Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com> wrote: > > Existing dt-bindings expected that each GPIO/pin bank within pin > controller has its own node with name matching the bank (e.g. gpa0, > gpx2) and "gpio-controller" property. The node name is then used for > matching between driver data and DTS. > > Newly introduced dtschema expects to have nodes ending with "-gpio-bank" > suffix, so rewrite bank-devicetree matching to look for old and new > style of naming. > > Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com> > --- Reviewed-by: Sam Protsenko <semen.protsenko@linaro.org> > drivers/pinctrl/samsung/pinctrl-samsung.c | 57 ++++++++++++++++++----- > 1 file changed, 45 insertions(+), 12 deletions(-) > > diff --git a/drivers/pinctrl/samsung/pinctrl-samsung.c b/drivers/pinctrl/samsung/pinctrl-samsung.c > index b19ebc43d886..b3a5bc473841 100644 > --- a/drivers/pinctrl/samsung/pinctrl-samsung.c > +++ b/drivers/pinctrl/samsung/pinctrl-samsung.c > @@ -1012,13 +1012,56 @@ static void samsung_banks_of_node_put(struct samsung_pinctrl_drv_data *d) > of_node_put(bank->of_node); > } > > +/* > + * Iterate over all driver pin banks to find one matching the name of node, > + * skipping optional "-gpio" node suffix. When found, assign node to the bank. > + */ > +static void samsung_banks_of_node_get(struct device *dev, > + struct samsung_pinctrl_drv_data *d, > + struct device_node *node) > +{ > + const char *suffix = "-gpio-bank"; > + struct samsung_pin_bank *bank; > + struct device_node *child; > + /* Pin bank names are up to 4 characters */ > + char node_name[20]; > + unsigned int i; > + size_t len; > + > + bank = d->pin_banks; > + for (i = 0; i < d->nr_banks; ++i, ++bank) { > + strscpy(node_name, bank->name, sizeof(node_name)); > + len = strlcat(node_name, suffix, sizeof(node_name)); > + if (len >= sizeof(node_name)) { > + dev_err(dev, "Too long pin bank name '%s', ignoring\n", > + bank->name); > + continue; > + } > + > + for_each_child_of_node(node, child) { > + if (!of_find_property(child, "gpio-controller", NULL)) > + continue; > + if (of_node_name_eq(child, node_name)) > + break; > + else if (of_node_name_eq(child, bank->name)) > + break; > + } > + > + if (child) > + bank->of_node = child; > + else > + dev_warn(dev, "Missing node for bank %s - invalid DTB\n", > + bank->name); > + /* child reference dropped in samsung_drop_banks_of_node() */ > + } > +} > + > /* retrieve the soc specific data */ > static const struct samsung_pin_ctrl * > samsung_pinctrl_get_soc_data(struct samsung_pinctrl_drv_data *d, > struct platform_device *pdev) > { > struct device_node *node = pdev->dev.of_node; > - struct device_node *np; > const struct samsung_pin_bank_data *bdata; > const struct samsung_pin_ctrl *ctrl; > struct samsung_pin_bank *bank; > @@ -1082,17 +1125,7 @@ samsung_pinctrl_get_soc_data(struct samsung_pinctrl_drv_data *d, > */ > d->virt_base = virt_base[0]; > > - for_each_child_of_node(node, np) { > - if (!of_find_property(np, "gpio-controller", NULL)) > - continue; > - bank = d->pin_banks; > - for (i = 0; i < d->nr_banks; ++i, ++bank) { > - if (of_node_name_eq(np, bank->name)) { > - bank->of_node = np; > - break; > - } > - } > - } > + samsung_banks_of_node_get(&pdev->dev, d, node); > > d->pin_base = pin_base; > pin_base += d->nr_pins; > -- > 2.32.0 >
diff --git a/drivers/pinctrl/samsung/pinctrl-samsung.c b/drivers/pinctrl/samsung/pinctrl-samsung.c index b19ebc43d886..b3a5bc473841 100644 --- a/drivers/pinctrl/samsung/pinctrl-samsung.c +++ b/drivers/pinctrl/samsung/pinctrl-samsung.c @@ -1012,13 +1012,56 @@ static void samsung_banks_of_node_put(struct samsung_pinctrl_drv_data *d) of_node_put(bank->of_node); } +/* + * Iterate over all driver pin banks to find one matching the name of node, + * skipping optional "-gpio" node suffix. When found, assign node to the bank. + */ +static void samsung_banks_of_node_get(struct device *dev, + struct samsung_pinctrl_drv_data *d, + struct device_node *node) +{ + const char *suffix = "-gpio-bank"; + struct samsung_pin_bank *bank; + struct device_node *child; + /* Pin bank names are up to 4 characters */ + char node_name[20]; + unsigned int i; + size_t len; + + bank = d->pin_banks; + for (i = 0; i < d->nr_banks; ++i, ++bank) { + strscpy(node_name, bank->name, sizeof(node_name)); + len = strlcat(node_name, suffix, sizeof(node_name)); + if (len >= sizeof(node_name)) { + dev_err(dev, "Too long pin bank name '%s', ignoring\n", + bank->name); + continue; + } + + for_each_child_of_node(node, child) { + if (!of_find_property(child, "gpio-controller", NULL)) + continue; + if (of_node_name_eq(child, node_name)) + break; + else if (of_node_name_eq(child, bank->name)) + break; + } + + if (child) + bank->of_node = child; + else + dev_warn(dev, "Missing node for bank %s - invalid DTB\n", + bank->name); + /* child reference dropped in samsung_drop_banks_of_node() */ + } +} + /* retrieve the soc specific data */ static const struct samsung_pin_ctrl * samsung_pinctrl_get_soc_data(struct samsung_pinctrl_drv_data *d, struct platform_device *pdev) { struct device_node *node = pdev->dev.of_node; - struct device_node *np; const struct samsung_pin_bank_data *bdata; const struct samsung_pin_ctrl *ctrl; struct samsung_pin_bank *bank; @@ -1082,17 +1125,7 @@ samsung_pinctrl_get_soc_data(struct samsung_pinctrl_drv_data *d, */ d->virt_base = virt_base[0]; - for_each_child_of_node(node, np) { - if (!of_find_property(np, "gpio-controller", NULL)) - continue; - bank = d->pin_banks; - for (i = 0; i < d->nr_banks; ++i, ++bank) { - if (of_node_name_eq(np, bank->name)) { - bank->of_node = np; - break; - } - } - } + samsung_banks_of_node_get(&pdev->dev, d, node); d->pin_base = pin_base; pin_base += d->nr_pins;
Existing dt-bindings expected that each GPIO/pin bank within pin controller has its own node with name matching the bank (e.g. gpa0, gpx2) and "gpio-controller" property. The node name is then used for matching between driver data and DTS. Newly introduced dtschema expects to have nodes ending with "-gpio-bank" suffix, so rewrite bank-devicetree matching to look for old and new style of naming. Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com> --- drivers/pinctrl/samsung/pinctrl-samsung.c | 57 ++++++++++++++++++----- 1 file changed, 45 insertions(+), 12 deletions(-)