diff options
author | Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com> | 2022-01-11 21:14:00 +0100 |
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committer | Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com> | 2022-01-23 12:21:56 +0100 |
commit | a29681b0cc3778c9ff6abdbcad579cba776dbb81 (patch) | |
tree | d6c7a8547fa345e57201997018ede0758817db26 /drivers/pinctrl/samsung | |
parent | 96f79935015cf3d7ca6fabf63cd13b8af45a7713 (diff) | |
download | linux-a29681b0cc3778c9ff6abdbcad579cba776dbb81.tar.bz2 |
pinctrl: samsung: accept GPIO bank nodes with a suffix
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>
Link: https://lore.kernel.org/r/20220111201426.326777-3-krzysztof.kozlowski@canonical.com
Diffstat (limited to 'drivers/pinctrl/samsung')
-rw-r--r-- | drivers/pinctrl/samsung/pinctrl-samsung.c | 57 |
1 files changed, 45 insertions, 12 deletions
diff --git a/drivers/pinctrl/samsung/pinctrl-samsung.c b/drivers/pinctrl/samsung/pinctrl-samsung.c index c4175fea7d74..568b6e65dfed 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; |