rockchip: rk3368: Add pinctrl driver
Add driver to support iomux setup for the most commonly
used peripherals on rk3368.
Signed-off-by: Andy Yan <andy.yan@rock-chips.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/pinctrl/rockchip/pinctrl_rk3368.c b/drivers/pinctrl/rockchip/pinctrl_rk3368.c
new file mode 100644
index 0000000..bdf0758
--- /dev/null
+++ b/drivers/pinctrl/rockchip/pinctrl_rk3368.c
@@ -0,0 +1,149 @@
+/*
+ * (C) Copyright 2017 Rockchip Electronics Co., Ltd
+ * Author: Andy Yan <andy.yan@rock-chips.com>
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+#include <common.h>
+#include <dm.h>
+#include <errno.h>
+#include <syscon.h>
+#include <asm/io.h>
+#include <asm/arch/clock.h>
+#include <asm/arch/hardware.h>
+#include <asm/arch/grf_rk3368.h>
+#include <asm/arch/periph.h>
+#include <dm/pinctrl.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+struct rk3368_pinctrl_priv {
+ struct rk3368_grf *grf;
+ struct rk3368_pmu_grf *pmugrf;
+};
+
+static void pinctrl_rk3368_uart_config(struct rk3368_pinctrl_priv *priv,
+ int uart_id)
+{
+ struct rk3368_grf *grf = priv->grf;
+ struct rk3368_pmu_grf *pmugrf = priv->pmugrf;
+
+ switch (uart_id) {
+ case PERIPH_ID_UART2:
+ rk_clrsetreg(&grf->gpio2a_iomux,
+ GPIO2A6_MASK | GPIO2A5_MASK,
+ GPIO2A6_UART2_SIN << GPIO2A6_SHIFT |
+ GPIO2A5_UART2_SOUT << GPIO2A5_SHIFT);
+ break;
+ case PERIPH_ID_UART0:
+ break;
+ case PERIPH_ID_UART1:
+ break;
+ case PERIPH_ID_UART3:
+ break;
+ case PERIPH_ID_UART4:
+ rk_clrsetreg(&pmugrf->gpio0d_iomux,
+ GPIO0D0_MASK | GPIO0D1_MASK |
+ GPIO0D2_MASK | GPIO0D3_MASK,
+ GPIO0D0_GPIO << GPIO0D0_SHIFT |
+ GPIO0D1_GPIO << GPIO0D1_SHIFT |
+ GPIO0D2_UART4_SOUT << GPIO0D2_SHIFT |
+ GPIO0D3_UART4_SIN << GPIO0D3_SHIFT);
+ break;
+ default:
+ debug("uart id = %d iomux error!\n", uart_id);
+ break;
+ }
+}
+
+static int rk3368_pinctrl_request(struct udevice *dev, int func, int flags)
+{
+ struct rk3368_pinctrl_priv *priv = dev_get_priv(dev);
+
+ debug("%s: func=%d, flags=%x\n", __func__, func, flags);
+ switch (func) {
+ case PERIPH_ID_UART0:
+ case PERIPH_ID_UART1:
+ case PERIPH_ID_UART2:
+ case PERIPH_ID_UART3:
+ case PERIPH_ID_UART4:
+ pinctrl_rk3368_uart_config(priv, func);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int rk3368_pinctrl_get_periph_id(struct udevice *dev,
+ struct udevice *periph)
+{
+ u32 cell[3];
+ int ret;
+
+ ret = fdtdec_get_int_array(gd->fdt_blob, dev_of_offset(periph),
+ "interrupts", cell, ARRAY_SIZE(cell));
+ if (ret < 0)
+ return -EINVAL;
+
+ switch (cell[1]) {
+ case 59:
+ return PERIPH_ID_UART4;
+ case 58:
+ return PERIPH_ID_UART3;
+ case 57:
+ return PERIPH_ID_UART2;
+ case 56:
+ return PERIPH_ID_UART1;
+ case 55:
+ return PERIPH_ID_UART0;
+ }
+
+ return -ENOENT;
+}
+
+static int rk3368_pinctrl_set_state_simple(struct udevice *dev,
+ struct udevice *periph)
+{
+ int func;
+
+ func = rk3368_pinctrl_get_periph_id(dev, periph);
+ if (func < 0)
+ return func;
+
+ return rk3368_pinctrl_request(dev, func, 0);
+}
+
+static struct pinctrl_ops rk3368_pinctrl_ops = {
+ .set_state_simple = rk3368_pinctrl_set_state_simple,
+ .request = rk3368_pinctrl_request,
+ .get_periph_id = rk3368_pinctrl_get_periph_id,
+};
+
+static int rk3368_pinctrl_probe(struct udevice *dev)
+{
+ struct rk3368_pinctrl_priv *priv = dev_get_priv(dev);
+ int ret = 0;
+
+ priv->grf = syscon_get_first_range(ROCKCHIP_SYSCON_GRF);
+ priv->pmugrf = syscon_get_first_range(ROCKCHIP_SYSCON_PMUGRF);
+
+ debug("%s: grf=%p pmugrf:%p\n", __func__, priv->grf, priv->pmugrf);
+
+ return ret;
+}
+
+static const struct udevice_id rk3368_pinctrl_ids[] = {
+ { .compatible = "rockchip,rk3368-pinctrl" },
+ { }
+};
+
+U_BOOT_DRIVER(pinctrl_rk3368) = {
+ .name = "rockchip_rk3368_pinctrl",
+ .id = UCLASS_PINCTRL,
+ .of_match = rk3368_pinctrl_ids,
+ .priv_auto_alloc_size = sizeof(struct rk3368_pinctrl_priv),
+ .ops = &rk3368_pinctrl_ops,
+ .bind = dm_scan_fdt_dev,
+ .probe = rk3368_pinctrl_probe,
+};