[U-Boot] [PATCH 2/5] rockchip: pinctrl: rk3399: add support for the HDMI I2C pins

[Philipp Tomsich]

To add HDMI support for the RK3399, this commit provides the needed
pinctrl functionality to configure the HDMI I2C pins (used for reading
the screen's EDID).

Signed-off-by: Philipp Tomsich <philipp.tomsich at theobroma-systems.com>

---

 arch/arm/include/asm/arch-rockchip/grf_rk3399.h |  2 ++
 drivers/pinctrl/rockchip/pinctrl_rk3399.c       | 26 +++++++++++++++++++++++++
 2 files changed, 28 insertions(+)

diff --git a/arch/arm/include/asm/arch-rockchip/grf_rk3399.h b/arch/arm/include/asm/arch-rockchip/grf_rk3399.h
index cbcff2e..22d8d97 100644
--- a/arch/arm/include/asm/arch-rockchip/grf_rk3399.h
+++ b/arch/arm/include/asm/arch-rockchip/grf_rk3399.h
@@ -439,9 +439,11 @@ enum {
 	GRF_GPIO4C0_SEL_SHIFT   = 0,
 	GRF_GPIO4C0_SEL_MASK    = 3 << GRF_GPIO4C0_SEL_SHIFT,
 	GRF_UART2DGBB_SIN       = 2,
+	GRF_HDMII2C_SCL         = 3,
 	GRF_GPIO4C1_SEL_SHIFT   = 2,
 	GRF_GPIO4C1_SEL_MASK    = 3 << GRF_GPIO4C1_SEL_SHIFT,
 	GRF_UART2DGBB_SOUT      = 2,
+	GRF_HDMII2C_SDA         = 3,
 	GRF_GPIO4C2_SEL_SHIFT   = 4,
 	GRF_GPIO4C2_SEL_MASK    = 3 << GRF_GPIO4C2_SEL_SHIFT,
 	GRF_PWM_0               = 1,
diff --git a/drivers/pinctrl/rockchip/pinctrl_rk3399.c b/drivers/pinctrl/rockchip/pinctrl_rk3399.c
index 6eb657f..0226731 100644
--- a/drivers/pinctrl/rockchip/pinctrl_rk3399.c
+++ b/drivers/pinctrl/rockchip/pinctrl_rk3399.c
@@ -247,6 +247,23 @@ static void pinctrl_rk3399_gmac_config(struct rk3399_grf_regs *grf, int mmc_id)
 }
 #endif
 
+#if !defined(CONFIG_SPL_BUILD)
+static void pinctrl_rk3399_hdmi_config(struct rk3399_grf_regs *grf, int hdmi_id)
+{
+	switch (hdmi_id) {
+	case PERIPH_ID_HDMI:
+		rk_clrsetreg(&grf->gpio4c_iomux,
+			     GRF_GPIO4C0_SEL_MASK | GRF_GPIO4C1_SEL_MASK,
+			     (GRF_HDMII2C_SCL << GRF_GPIO4C0_SEL_SHIFT) |
+			     (GRF_HDMII2C_SDA << GRF_GPIO4C1_SEL_SHIFT));
+		break;
+	default:
+		debug("%s: hdmi_id = %d unsupported\n", __func__, hdmi_id);
+		break;
+	}
+}
+#endif
+
 static int rk3399_pinctrl_request(struct udevice *dev, int func, int flags)
 {
 	struct rk3399_pinctrl_priv *priv = dev_get_priv(dev);
@@ -296,6 +313,11 @@ static int rk3399_pinctrl_request(struct udevice *dev, int func, int flags)
 		pinctrl_rk3399_gmac_config(priv->grf, func);
 		break;
 #endif
+#if !defined(CONFIG_SPL_BUILD)
+	case PERIPH_ID_HDMI:
+		pinctrl_rk3399_hdmi_config(priv->grf, func);
+		break;
+#endif
 	default:
 		return -EINVAL;
 	}
@@ -342,6 +364,10 @@ static int rk3399_pinctrl_get_periph_id(struct udevice *dev,
 	case 12:
 		return PERIPH_ID_GMAC;
 #endif
+#if !defined(CONFIG_SPL_BUILD)
+	case 23:
+		return PERIPH_ID_HDMI;
+#endif
 	}
 #endif
 	return -ENOENT;
-- 
1.9.1