drivers: pinctrl: Add simple pinctrl driver for Qualcomm/Atheros ar933x.

This is a simple pinctrl driver, it just support uart and spi pin-mux now.

Signed-off-by: Wills Wang <wills.wang@live.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
[fixed typo in commit subject line]
Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>

diff --git a/drivers/pinctrl/Kconfig b/drivers/pinctrl/Kconfig
index 2a69bab..854d5a5 100644 (file)
--- a/drivers/pinctrl/Kconfig
+++ b/drivers/pinctrl/Kconfig
@@ -105,6 +105,15 @@ config SPL_PINCONF
 
 if PINCTRL || SPL_PINCTRL
 
+config AR933X_PINCTRL
+       bool "QCA/Athores ar933x pin control driver"
+       depends on DM && SOC_AR933X
+       help
+         Support pin multiplexing control on QCA/Athores ar933x SoCs.
+         The driver is controlled by a device tree node which contains
+         both the GPIO definitions and pin control functions for each
+         available multiplex function.
+
 config ROCKCHIP_PINCTRL
        bool "Rockchip pin control driver"
        depends on DM

diff --git a/drivers/pinctrl/Makefile b/drivers/pinctrl/Makefile
index 37dc904..b99ed2f 100644 (file)
--- a/drivers/pinctrl/Makefile
+++ b/drivers/pinctrl/Makefile
@@ -6,6 +6,7 @@ obj-y                                   += pinctrl-uclass.o
 obj-$(CONFIG_$(SPL_)PINCTRL_GENERIC)   += pinctrl-generic.o
 
 obj-y                                  += nxp/
+obj-$(CONFIG_ARCH_ATH79) += ath79/
 obj-$(CONFIG_ARCH_ROCKCHIP) += rockchip/
 obj-$(CONFIG_PINCTRL_SANDBOX)  += pinctrl-sandbox.o
 

diff --git a/drivers/pinctrl/ath79/Makefile b/drivers/pinctrl/ath79/Makefile
new file mode 100644 (file)
index 0000000..3fdcf6c
--- /dev/null
+++ b/drivers/pinctrl/ath79/Makefile
@@ -0,0 +1,5 @@
+#
+# SPDX-License-Identifier:     GPL-2.0+
+#
+
+obj-$(CONFIG_AR933X_PINCTRL) += pinctrl_ar933x.o

diff --git a/drivers/pinctrl/ath79/pinctrl_ar933x.c b/drivers/pinctrl/ath79/pinctrl_ar933x.c
new file mode 100644 (file)
index 0000000..e3f64b6
--- /dev/null
+++ b/drivers/pinctrl/ath79/pinctrl_ar933x.c
@@ -0,0 +1,136 @@
+/*
+ * Copyright (C) 2015-2016 Wills Wang <wills.wang@live.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <errno.h>
+#include <asm/io.h>
+#include <dm/pinctrl.h>
+#include <mach/ar71xx_regs.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+enum periph_id {
+       PERIPH_ID_UART0,
+       PERIPH_ID_SPI0,
+       PERIPH_ID_NONE = -1,
+};
+
+struct ar933x_pinctrl_priv {
+       void __iomem *regs;
+};
+
+static void pinctrl_ar933x_spi_config(struct ar933x_pinctrl_priv *priv, int cs)
+{
+       switch (cs) {
+       case 0:
+               clrsetbits_be32(priv->regs + AR71XX_GPIO_REG_OE,
+                               AR933X_GPIO(4), AR933X_GPIO(3) |
+                               AR933X_GPIO(5) | AR933X_GPIO(2));
+               setbits_be32(priv->regs + AR71XX_GPIO_REG_FUNC,
+                            AR933X_GPIO_FUNC_SPI_EN |
+                            AR933X_GPIO_FUNC_RES_TRUE);
+               break;
+       }
+}
+
+static void pinctrl_ar933x_uart_config(struct ar933x_pinctrl_priv *priv, int uart_id)
+{
+       switch (uart_id) {
+       case PERIPH_ID_UART0:
+               clrsetbits_be32(priv->regs + AR71XX_GPIO_REG_OE,
+                               AR933X_GPIO(9), AR933X_GPIO(10));
+               setbits_be32(priv->regs + AR71XX_GPIO_REG_FUNC,
+                            AR933X_GPIO_FUNC_UART_EN |
+                            AR933X_GPIO_FUNC_RES_TRUE);
+               break;
+       }
+}
+
+static int ar933x_pinctrl_request(struct udevice *dev, int func, int flags)
+{
+       struct ar933x_pinctrl_priv *priv = dev_get_priv(dev);
+
+       debug("%s: func=%x, flags=%x\n", __func__, func, flags);
+       switch (func) {
+       case PERIPH_ID_SPI0:
+               pinctrl_ar933x_spi_config(priv, flags);
+               break;
+       case PERIPH_ID_UART0:
+               pinctrl_ar933x_uart_config(priv, func);
+               break;
+       default:
+               return -EINVAL;
+       }
+
+       return 0;
+}
+
+static int ar933x_pinctrl_get_periph_id(struct udevice *dev,
+                                       struct udevice *periph)
+{
+       u32 cell[2];
+       int ret;
+
+       ret = fdtdec_get_int_array(gd->fdt_blob, periph->of_offset,
+                                  "interrupts", cell, ARRAY_SIZE(cell));
+       if (ret < 0)
+               return -EINVAL;
+
+       switch (cell[0]) {
+       case 128:
+               return PERIPH_ID_UART0;
+       case 129:
+               return PERIPH_ID_SPI0;
+       }
+       return -ENOENT;
+}
+
+static int ar933x_pinctrl_set_state_simple(struct udevice *dev,
+                                          struct udevice *periph)
+{
+       int func;
+
+       func = ar933x_pinctrl_get_periph_id(dev, periph);
+       if (func < 0)
+               return func;
+       return ar933x_pinctrl_request(dev, func, 0);
+}
+
+static struct pinctrl_ops ar933x_pinctrl_ops = {
+       .set_state_simple       = ar933x_pinctrl_set_state_simple,
+       .request        = ar933x_pinctrl_request,
+       .get_periph_id  = ar933x_pinctrl_get_periph_id,
+};
+
+static int ar933x_pinctrl_probe(struct udevice *dev)
+{
+       struct ar933x_pinctrl_priv *priv = dev_get_priv(dev);
+       fdt_addr_t addr;
+
+       addr = dev_get_addr(dev);
+       if (addr == FDT_ADDR_T_NONE)
+               return -EINVAL;
+
+       priv->regs = map_physmem(addr,
+                                AR71XX_GPIO_SIZE,
+                                MAP_NOCACHE);
+       return 0;
+}
+
+static const struct udevice_id ar933x_pinctrl_ids[] = {
+       { .compatible = "qca,ar933x-pinctrl" },
+       { }
+};
+
+U_BOOT_DRIVER(pinctrl_ar933x) = {
+       .name           = "pinctrl_ar933x",
+       .id             = UCLASS_PINCTRL,
+       .of_match       = ar933x_pinctrl_ids,
+       .priv_auto_alloc_size = sizeof(struct ar933x_pinctrl_priv),
+       .ops            = &ar933x_pinctrl_ops,
+       .probe          = ar933x_pinctrl_probe,
+};