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authorWills Wang <wills.wang@live.com>2016-03-16 16:59:55 +0800
committerDaniel Schwierzeck <daniel.schwierzeck@gmail.com>2016-05-21 01:25:50 +0200
commita79d0643f4cac19711cb8d1c2088fc907d47500f (patch)
tree823ffaad4367a867cab4fe4c323c73e83b5e3827 /drivers/pinctrl
parent9b03f802ae63cf9c053c0125a1edd2b4c7852b9a (diff)
downloadblackbird-obmc-uboot-a79d0643f4cac19711cb8d1c2088fc907d47500f.tar.gz
blackbird-obmc-uboot-a79d0643f4cac19711cb8d1c2088fc907d47500f.zip
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>
Diffstat (limited to 'drivers/pinctrl')
-rw-r--r--drivers/pinctrl/Kconfig9
-rw-r--r--drivers/pinctrl/Makefile1
-rw-r--r--drivers/pinctrl/ath79/Makefile5
-rw-r--r--drivers/pinctrl/ath79/pinctrl_ar933x.c136
4 files changed, 151 insertions, 0 deletions
diff --git a/drivers/pinctrl/Kconfig b/drivers/pinctrl/Kconfig
index 2a69babec4..854d5a500a 100644
--- 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 37dc904640..b99ed2f191 100644
--- 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-$(CONFIG_PINCTRL_SANDBOX) += pinctrl-sandbox.o
diff --git a/drivers/pinctrl/ath79/Makefile b/drivers/pinctrl/ath79/Makefile
new file mode 100644
index 0000000000..3fdcf6c4b8
--- /dev/null
+++ b/drivers/pinctrl/ath79/Makefile
@@ -0,0 +1,5 @@
+#
+# SPDX-License-Identifier: GPL-2.0+
+#
+
+obj-$(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
index 0000000000..e3f64b6355
--- /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,
+};
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