imx8ulp_evk: Control LPI2C0 PCA6416 and TPM0 for display

The board use IO9 of PCA6416 on LPI2C0 and TPM0 for MIPI DSI MUX and
backlight. However the LPI2C0 and TPM0 are M33 resources, in this
patch we simply access them, but this is a temporary solution.
We will modify it when M33 FW changes to set MIPI DSI panel as default
path and enable backlight after reset.

Signed-off-by: Ye Li <ye.li@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>

1 files changed, 56 insertions, 0 deletions

diff --git a/board/freescale/imx8ulp_evk/imx8ulp_evk.c b/board/freescale/imx8ulp_evk/imx8ulp_evk.c
index 3ff4d43..1502e4d 100644
--- a/board/freescale/imx8ulp_evk/imx8ulp_evk.c
+++ b/board/freescale/imx8ulp_evk/imx8ulp_evk.c
@@ -12,6 +12,7 @@
 #include <asm/arch/sys_proto.h>
 #include <miiphy.h>
 #include <netdev.h>
+#include <asm/gpio.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
@@ -48,11 +49,66 @@ int board_phy_config(struct phy_device *phydev)
 }
 #endif
 
+#define I2C_PAD_CTRL	(PAD_CTL_ODE)
+static const iomux_cfg_t lpi2c0_pads[] = {
+	IMX8ULP_PAD_PTA8__LPI2C0_SCL | MUX_PAD_CTRL(I2C_PAD_CTRL),
+	IMX8ULP_PAD_PTA9__LPI2C0_SDA | MUX_PAD_CTRL(I2C_PAD_CTRL),
+};
+
+#define TPM_PAD_CTRL	(PAD_CTL_DSE)
+static const iomux_cfg_t tpm0_pads[] = {
+	IMX8ULP_PAD_PTA3__TPM0_CH2 | MUX_PAD_CTRL(TPM_PAD_CTRL),
+};
+
+void mipi_dsi_mux_panel(void)
+{
+	int ret;
+	struct gpio_desc desc;
+
+	/* It is temp solution to directly access i2c, need change to rpmsg later */
+
+	/* enable lpi2c0 clock and iomux */
+	imx8ulp_iomux_setup_multiple_pads(lpi2c0_pads, ARRAY_SIZE(lpi2c0_pads));
+	writel(0xD2000000, 0x28091060);
+
+	ret = dm_gpio_lookup_name("gpio@20_9", &desc);
+	if (ret) {
+		printf("%s lookup gpio@20_9 failed ret = %d\n", __func__, ret);
+		return;
+	}
+
+	ret = dm_gpio_request(&desc, "dsi_mux");
+	if (ret) {
+		printf("%s request dsi_mux failed ret = %d\n", __func__, ret);
+		return;
+	}
+
+	dm_gpio_set_dir_flags(&desc, GPIOD_IS_OUT | GPIOD_IS_OUT_ACTIVE);
+}
+
+void mipi_dsi_panel_backlight(void)
+{
+	/* It is temp solution to directly access pwm, need change to rpmsg later */
+	imx8ulp_iomux_setup_multiple_pads(tpm0_pads, ARRAY_SIZE(tpm0_pads));
+	writel(0xD4000001, 0x28091054);
+
+	/* Use center-aligned PWM mode, CPWMS=1, MSnB:MSnA = 10, ELSnB:ELSnA = 00 */
+	writel(1000, 0x28095018);
+	writel(1000, 0x28095034); /* MOD = CV, full duty */
+	writel(0x28, 0x28095010);
+	writel(0x20, 0x28095030);
+}
+
 int board_init(void)
 {
 	if (IS_ENABLED(CONFIG_FEC_MXC))
 		setup_fec();
 
+	if (IS_ENABLED(CONFIG_DM_VIDEO)) {
+		mipi_dsi_mux_panel();
+		mipi_dsi_panel_backlight();
+	}
+
 	return 0;
 }