diff options
| -rw-r--r-- | Documentation/devicetree/bindings/pinctrl/ste,nomadik.txt | 7 | ||||
| -rw-r--r-- | drivers/pinctrl/nomadik/pinctrl-nomadik.c | 25 |
2 files changed, 30 insertions, 2 deletions
diff --git a/Documentation/devicetree/bindings/pinctrl/ste,nomadik.txt b/Documentation/devicetree/bindings/pinctrl/ste,nomadik.txt index f63fcb3..2213802 100644 --- a/Documentation/devicetree/bindings/pinctrl/ste,nomadik.txt +++ b/Documentation/devicetree/bindings/pinctrl/ste,nomadik.txt @@ -3,7 +3,9 @@ ST Ericsson Nomadik pinmux controller Required properties: - compatible: "stericsson,db8500-pinctrl", "stericsson,db8540-pinctrl", "stericsson,stn8815-pinctrl" -- reg: Should contain the register physical address and length of the PRCMU. +- nomadik-gpio-chips: array of phandles to the corresponding GPIO chips + (these have the register ranges used by the pin controller). +- prcm: phandle to the PRCMU managing the back end of this pin controller Please refer to pinctrl-bindings.txt in this directory for details of the common pinctrl bindings used by client devices, including the meaning of the @@ -74,7 +76,8 @@ Example board file extract: pinctrl@80157000 { compatible = "stericsson,db8500-pinctrl"; - reg = <0x80157000 0x2000>; + nomadik-gpio-chips = <&gpio0>, <&gpio1>, <&gpio2>, <&gpio3>; + prcm = <&prcmu>; pinctrl-names = "default"; diff --git a/drivers/pinctrl/nomadik/pinctrl-nomadik.c b/drivers/pinctrl/nomadik/pinctrl-nomadik.c index 7b1160d..143d1c0 100644 --- a/drivers/pinctrl/nomadik/pinctrl-nomadik.c +++ b/drivers/pinctrl/nomadik/pinctrl-nomadik.c @@ -2019,6 +2019,31 @@ static int nmk_pinctrl_probe(struct platform_device *pdev) if (version == PINCTRL_NMK_DB8540) nmk_pinctrl_db8540_init(&npct->soc); + /* + * Since we depend on the GPIO chips to provide clock and register base + * for the pin control operations, make sure that we have these + * populated before we continue. Follow the phandles to instantiate + * them. The GPIO portion of the actual hardware may be probed before + * or after this point: it shouldn't matter as the APIs are orthogonal. + */ + for (i = 0; i < NMK_MAX_BANKS; i++) { + struct device_node *gpio_np; + struct nmk_gpio_chip *nmk_chip; + + gpio_np = of_parse_phandle(np, "nomadik-gpio-chips", i); + if (gpio_np) { + dev_info(&pdev->dev, + "populate NMK GPIO %d \"%s\"\n", + i, gpio_np->name); + nmk_chip = nmk_gpio_populate_chip(gpio_np, pdev); + if (IS_ERR(nmk_chip)) + dev_err(&pdev->dev, + "could not populate nmk chip struct " + "- continue anyway\n"); + of_node_put(gpio_np); + } + } + prcm_np = of_parse_phandle(np, "prcm", 0); if (prcm_np) npct->prcm_base = of_iomap(prcm_np, 0); |