r11_st21_nfc.dtsi

/*
 * Device Tree config for the ST21 NFC chip
 */

#include <dt-bindings/interrupt-controller/arm-gic.h>
#include <dt-bindings/interrupt-controller/irq.h>
#include <dt-bindings/pinctrl/samsung.h>

/*******/
/* NFC */
/*******/

&i2c_0 {
	/*******/
	/* I2C */
	/*******/
	#address-cells = <1>;
	#size-cells = <0>;
	status = "ok";		/* Enable I2C0 */
	samsung,i2c-max-bus-freq = <400000>;

	/* NFC ST - st21nfc */
	st21nfc: st21nfc@08 {		/* Default I2C address 0x08 */
		compatible = "st,st21nfc";
		reg = <0x08>;
		reset-gpios = <&gpg1 0 0x00>;	/* SOC_NFC_RST_L */
		pidle-gpios = <&gpg0 1 0x00>;	/* SOC_NFC_INT_H - labeled wrong */
		irq-gpios = <&gpa0 3 0x00>;	/* NFC_SOC_INT_H */
		clkreq-gpios = <&gpa1 5 0x00>;	/* NFC_SOC_CLK_REQ */
		clocks = <&clock OSCCLK_NFC>;	/* Connect Ext 26 MHz Clock */
		clock-names = "nfc_ref_clk";
		st,clk_pinctrl;
		pinctrl-names = "default";
		pinctrl-0 = <&nfc_irq &nfc_clkreq &nfc_nreset &nfc_pidle>;
		status = "ok";
	};
};

&pinctrl_0 {
	/* NFC_SOC_INT_H */
	nfc_irq: nfc-irq {
		samsung,pins = "gpa0-3";
		samsung,pin-function = <EXYNOS_PIN_FUNC_INPUT>;
		samsung,pin-pud = <EXYNOS_PIN_PULL_NONE>;
		samsung,pin-drv = <0>;	/* LVL1 DRV */
		samsung,pin-con-pdn = <EXYNOS_PIN_PDN_INPUT>;
		samsung,pin-pud-pdn = <EXYNOS_PIN_PULL_NONE>;
	};

	/* NFC_SOC_CLK_REQ */
	nfc_clkreq: nfc-clkreq {
		samsung,pins = "gpa1-5";
		samsung,pin-function = <EXYNOS_PIN_FUNC_F>;
		samsung,pin-pud = <EXYNOS_PIN_PULL_NONE>;
		samsung,pin-drv = <0>;	/* LVL1 DRV */
		samsung,pin-con-pdn = <EXYNOS_PIN_PDN_INPUT>;
		samsung,pin-pud-pdn = <EXYNOS_PIN_PULL_NONE>;
	};
};

&pinctrl_5 {
	/* SOC_NFC_RST_L */
	nfc_nreset: nfc-nreset {
		samsung,pins = "gpg1-0";
		samsung,pin-function = <EXYNOS_PIN_FUNC_OUTPUT>;
		samsung,pin-pud = <EXYNOS_PIN_PULL_NONE>;
		samsung,pin-drv = <0>;	/* LVL1 DRV */
		samsung,pin-con-pdn = <EXYNOS_PIN_PDN_PREV>;
		samsung,pin-pud-pdn = <EXYNOS_PIN_PULL_NONE>;
	};

	/* SOC_NFC_INT_H - labeled incorrectly on schematic. Actually an input */
	nfc_pidle: nfc-pidle {
		samsung,pins = "gpg0-1";
		samsung,pin-function = <EXYNOS_PIN_FUNC_INPUT>;
		samsung,pin-pud = <EXYNOS_PIN_PULL_NONE>;
		samsung,pin-drv = <0>;	/* LVL1 DRV */
		samsung,pin-con-pdn = <EXYNOS_PIN_PDN_INPUT>;
		samsung,pin-pud-pdn = <EXYNOS_PIN_PULL_NONE>;
	};
};