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[188.155.168.84]) by smtp.gmail.com with ESMTPSA id f23sm3852212ejj.128.2022.01.11.12.15.17 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 11 Jan 2022 12:15:18 -0800 (PST) From: Krzysztof Kozlowski To: Tomasz Figa , Krzysztof Kozlowski , Sylwester Nawrocki , Linus Walleij , Rob Herring , linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, linux-gpio@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Marek Szyprowski , Sam Protsenko , Chanho Park , Alim Akhtar Subject: [PATCH v2 02/28] pinctrl: samsung: accept GPIO bank nodes with a suffix Date: Tue, 11 Jan 2022 21:14:00 +0100 Message-Id: <20220111201426.326777-3-krzysztof.kozlowski@canonical.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20220111201426.326777-1-krzysztof.kozlowski@canonical.com> References: <20220111201426.326777-1-krzysztof.kozlowski@canonical.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-gpio@vger.kernel.org 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 --- 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;