* [PATCH v4 0/2] add brcm iproc gpio driver
@ 2020-05-03 16:31 Rayagonda Kokatanur
2020-05-03 16:31 ` [PATCH v4 1/2] drivers: gpio: add broadcom iproc gpio driver support Rayagonda Kokatanur
2020-05-03 16:31 ` [PATCH v4 2/2] gpio: do not include <asm/arch/gpio.h> on TARGET_BCMNS3 Rayagonda Kokatanur
0 siblings, 2 replies; 4+ messages in thread
From: Rayagonda Kokatanur @ 2020-05-03 16:31 UTC (permalink / raw)
To: u-boot
Add support for broadcom iproc gpio driver.
Changes from v3:
-Address review comments from Simon Glass,
Rearrange header file,
Add struct comment taking about members,
Use clrsetbits_le32(),
Add new line before return etc.
Changes from v2:
-remove ununsed variable "node" in iproc_get_gpio_pctrl_mapping()
func to fix compilation warning.
Changes from v1:
-Address review comments from Simon Glass,
Use dev_read_...() instead of fdtdec_...().
Rayagonda Kokatanur (2):
drivers: gpio: add broadcom iproc gpio driver support
gpio: do not include <asm/arch/gpio.h> on TARGET_BCMNS3
arch/arm/include/asm/gpio.h | 2 +-
drivers/gpio/Kconfig | 11 ++
drivers/gpio/Makefile | 1 +
drivers/gpio/iproc_gpio.c | 269 ++++++++++++++++++++++++++++++++++++
4 files changed, 282 insertions(+), 1 deletion(-)
create mode 100644 drivers/gpio/iproc_gpio.c
--
2.17.1
^ permalink raw reply [flat|nested] 4+ messages in thread
* [PATCH v4 1/2] drivers: gpio: add broadcom iproc gpio driver support
2020-05-03 16:31 [PATCH v4 0/2] add brcm iproc gpio driver Rayagonda Kokatanur
@ 2020-05-03 16:31 ` Rayagonda Kokatanur
2020-05-04 14:17 ` Simon Glass
2020-05-03 16:31 ` [PATCH v4 2/2] gpio: do not include <asm/arch/gpio.h> on TARGET_BCMNS3 Rayagonda Kokatanur
1 sibling, 1 reply; 4+ messages in thread
From: Rayagonda Kokatanur @ 2020-05-03 16:31 UTC (permalink / raw)
To: u-boot
Add gpio driver support for Broadcom iproc-based socs.
Signed-off-by: Rayagonda Kokatanur <rayagonda.kokatanur@broadcom.com>
Signed-off-by: Sheetal Tigadoli <sheetal.tigadoli@broadcom.com>
---
drivers/gpio/Kconfig | 11 ++
drivers/gpio/Makefile | 1 +
drivers/gpio/iproc_gpio.c | 269 ++++++++++++++++++++++++++++++++++++++
3 files changed, 281 insertions(+)
create mode 100644 drivers/gpio/iproc_gpio.c
diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index 2081520f42..57d2cd2e75 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -135,6 +135,17 @@ config IMX_RGPIO2P
help
This driver supports i.MX7ULP Rapid GPIO2P controller.
+config IPROC_GPIO
+ bool "Broadcom iProc GPIO driver(without pinconf)"
+ default n
+ help
+ The Broadcom iProc based SoCs- Cygnus, NS2, NS3, NSP and Stingray,
+ use the same GPIO Controller IP hence this driver could be used
+ for all.
+
+ The Broadcom iProc based SoCs have multiple GPIO controllers and only
+ the always-ON GPIO controller (CRMU/AON) is supported by this driver.
+
config HSDK_CREG_GPIO
bool "HSDK CREG GPIO griver"
depends on DM_GPIO
diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile
index 7638259007..5dc5849477 100644
--- a/drivers/gpio/Makefile
+++ b/drivers/gpio/Makefile
@@ -19,6 +19,7 @@ obj-$(CONFIG_CORTINA_GPIO) += cortina_gpio.o
obj-$(CONFIG_INTEL_GPIO) += intel_gpio.o
obj-$(CONFIG_INTEL_ICH6_GPIO) += intel_ich6_gpio.o
obj-$(CONFIG_INTEL_BROADWELL_GPIO) += intel_broadwell_gpio.o
+obj-$(CONFIG_IPROC_GPIO) += iproc_gpio.o
obj-$(CONFIG_KIRKWOOD_GPIO) += kw_gpio.o
obj-$(CONFIG_KONA_GPIO) += kona_gpio.o
obj-$(CONFIG_MARVELL_GPIO) += mvgpio.o
diff --git a/drivers/gpio/iproc_gpio.c b/drivers/gpio/iproc_gpio.c
new file mode 100644
index 0000000000..79ccc58216
--- /dev/null
+++ b/drivers/gpio/iproc_gpio.c
@@ -0,0 +1,269 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2020 Broadcom
+ */
+
+#include <common.h>
+#include <errno.h>
+#include <asm/gpio.h>
+#include <asm/io.h>
+#include <dm.h>
+#include <dm/device_compat.h>
+#include <dm/devres.h>
+#include <dm/pinctrl.h>
+
+/*
+ * There are five GPIO bank register. Each bank can configure max of 32 gpios.
+ * BANK0 - gpios 0 to 31
+ * BANK1 - gpios 32 to 63
+ * BANK2 - gpios 64 to 95
+ * BANK3 - gpios 96 to 127
+ * BANK4 - gpios 128 to 150
+ *
+ * Offset difference between consecutive bank register is 0x200
+ */
+#define NGPIO_PER_BANK 32
+#define GPIO_BANK_SIZE 0x200
+#define GPIO_BANK(pin) ((pin) / NGPIO_PER_BANK)
+#define IPROC_GPIO_SHIFT(pin) ((pin) % NGPIO_PER_BANK)
+#define IPROC_GPIO_REG(pin, reg) (GPIO_BANK_SIZE * GPIO_BANK(pin) + (reg))
+
+/* device register offset */
+#define IPROC_GPIO_DATA_IN_OFFSET 0x00
+#define IPROC_GPIO_DATA_OUT_OFFSET 0x04
+#define IPROC_GPIO_OUT_EN_OFFSET 0x08
+
+/**
+ * struct iproc_gpio_pctrl_map - mapping between gpio and pinctrl specfied
+ * using gpio-ranges parameter in dt.
+ * @gpio_pin: start of gpio number in gpio-ranges
+ * @pctrl_pin: start of pinctrl number in gpio-ranges
+ * @npins: total number of pins in gpio-ranges
+ * @node: list node
+ */
+struct iproc_gpio_pctrl_map {
+ u32 gpio_pin;
+ u32 pctrl_pin;
+ u32 npins;
+ struct list_head node;
+};
+
+/**
+ * struct iproc_gpio_pctrl_map - gpio device instance
+ * @pinctrl_dev:pointer to pinctrl device
+ * @gpiomap: list node having mapping between gpio and pinctrl
+ * @base: I/O register base address of gpio device
+ * @name: gpio device name, ex GPIO0, GPIO1
+ * @ngpios: total number of gpios
+ */
+struct iproc_gpio_platdata {
+ struct udevice *pinctrl_dev;
+ struct list_head gpiomap;
+ void __iomem *base;
+ char *name;
+ u32 ngpios;
+};
+
+/**
+ * iproc_gpio_set_bit - set or clear one bit (corresponding to the GPIO pin)
+ * in a iproc GPIO register
+ *
+ * @iproc_gpio: Iproc GPIO device
+ * @reg: register offset
+ * @gpio: GPIO pin
+ * @set: set or clear
+ */
+static inline void iproc_gpio_set_bit(struct iproc_gpio_platdata *plat,
+ u32 reg, u32 gpio, bool set)
+{
+ u32 offset = IPROC_GPIO_REG(gpio, reg);
+ u32 shift = IPROC_GPIO_SHIFT(gpio);
+
+ clrsetbits_le32(plat->base + offset, BIT(shift),
+ (set ? BIT(shift) : 0));
+}
+
+static inline bool iproc_gpio_get_bit(struct iproc_gpio_platdata *plat,
+ u32 reg, u32 gpio)
+{
+ u32 offset = IPROC_GPIO_REG(gpio, reg);
+ u32 shift = IPROC_GPIO_SHIFT(gpio);
+
+ return readl(plat->base + offset) & BIT(shift);
+}
+
+static u32 iproc_get_pctrl_from_gpio(struct iproc_gpio_platdata *plat, u32 gpio)
+{
+ struct iproc_gpio_pctrl_map *range = NULL;
+ struct list_head *pos, *tmp;
+ u32 ret = 0;
+
+ list_for_each_safe(pos, tmp, &plat->gpiomap) {
+ range = list_entry(pos, struct iproc_gpio_pctrl_map, node);
+ if (gpio == range->gpio_pin ||
+ gpio < (range->gpio_pin + range->npins)) {
+ ret = range->pctrl_pin + (gpio - range->gpio_pin);
+ break;
+ }
+ }
+
+ return ret;
+}
+
+static int iproc_get_gpio_pctrl_mapping(struct udevice *dev)
+{
+ struct iproc_gpio_platdata *plat = dev_get_platdata(dev);
+ struct iproc_gpio_pctrl_map *range = NULL;
+ struct ofnode_phandle_args args;
+ int index = 0, ret;
+
+ for (;; index++) {
+ ret = dev_read_phandle_with_args(dev, "gpio-ranges",
+ NULL, 3, index, &args);
+ if (ret)
+ break;
+
+ range = devm_kzalloc(dev, sizeof(*range), GFP_KERNEL);
+ if (!range)
+ return -ENOMEM;
+
+ range->gpio_pin = args.args[0];
+ range->pctrl_pin = args.args[1];
+ range->npins = args.args[2];
+ list_add_tail(&range->node, &plat->gpiomap);
+ }
+
+ return 0;
+}
+
+static int iproc_gpio_request(struct udevice *dev, u32 gpio, const char *label)
+{
+ struct iproc_gpio_platdata *plat = dev_get_platdata(dev);
+ u32 pctrl;
+
+ if (!plat->pinctrl_dev)
+ return 0;
+
+ pctrl = iproc_get_pctrl_from_gpio(plat, gpio);
+
+ return pinctrl_request(plat->pinctrl_dev, pctrl, 0);
+}
+
+static int iproc_gpio_direction_input(struct udevice *dev, u32 gpio)
+{
+ struct iproc_gpio_platdata *plat = dev_get_platdata(dev);
+
+ iproc_gpio_set_bit(plat, IPROC_GPIO_OUT_EN_OFFSET, gpio, false);
+ dev_dbg(dev, "gpio:%u set input\n", gpio);
+
+ return 0;
+}
+
+static int iproc_gpio_direction_output(struct udevice *dev, u32 gpio, int value)
+{
+ struct iproc_gpio_platdata *plat = dev_get_platdata(dev);
+
+ iproc_gpio_set_bit(plat, IPROC_GPIO_OUT_EN_OFFSET, gpio, true);
+ iproc_gpio_set_bit(plat, IPROC_GPIO_DATA_OUT_OFFSET, gpio, value);
+ dev_dbg(dev, "gpio:%u set output, value:%d\n", gpio, value);
+
+ return 0;
+}
+
+static int iproc_gpio_get_value(struct udevice *dev, u32 gpio)
+{
+ struct iproc_gpio_platdata *plat = dev_get_platdata(dev);
+ int value;
+
+ value = iproc_gpio_get_bit(plat, IPROC_GPIO_DATA_IN_OFFSET, gpio);
+ dev_dbg(dev, "gpio:%u get, value:%d\n", gpio, value);
+
+ return value;
+}
+
+static int iproc_gpio_set_value(struct udevice *dev, u32 gpio, int value)
+{
+ struct iproc_gpio_platdata *plat = dev_get_platdata(dev);
+
+ if (iproc_gpio_get_bit(plat, IPROC_GPIO_OUT_EN_OFFSET, gpio))
+ iproc_gpio_set_bit(plat, IPROC_GPIO_DATA_OUT_OFFSET, gpio,
+ value);
+
+ dev_dbg(dev, "gpio:%u set, value:%d\n", gpio, value);
+ return 0;
+}
+
+static int iproc_gpio_get_function(struct udevice *dev, u32 gpio)
+{
+ struct iproc_gpio_platdata *plat = dev_get_platdata(dev);
+
+ if (iproc_gpio_get_bit(plat, IPROC_GPIO_OUT_EN_OFFSET, gpio))
+ return GPIOF_OUTPUT;
+ else
+ return GPIOF_INPUT;
+}
+
+static int iproc_gpio_ofdata_to_platdata(struct udevice *dev)
+{
+ struct iproc_gpio_platdata *plat = dev_get_platdata(dev);
+ struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
+ int ret;
+ char name[10];
+
+ plat->base = dev_read_addr_ptr(dev);
+ if (!plat->base) {
+ debug("%s: Failed to get base address\n", __func__);
+ return -EINVAL;
+ }
+
+ ret = dev_read_u32(dev, "ngpios", &plat->ngpios);
+ if (ret < 0) {
+ dev_err(dev, "%s: Failed to get ngpios\n", __func__);
+ return ret;
+ }
+
+ uclass_get_device_by_phandle(UCLASS_PINCTRL, dev, "gpio-ranges",
+ &plat->pinctrl_dev);
+
+ INIT_LIST_HEAD(&plat->gpiomap);
+ ret = iproc_get_gpio_pctrl_mapping(dev);
+ if (ret) {
+ dev_err(dev, "%s: Failed to get gpio to pctrl map ret(%d)\n",
+ __func__, ret);
+ return ret;
+ }
+
+ snprintf(name, sizeof(name), "GPIO%d", dev->req_seq);
+ plat->name = strdup(name);
+
+ uc_priv->gpio_count = plat->ngpios;
+ uc_priv->bank_name = plat->name;
+
+ dev_info(dev, ":bank name(%s) base %p, #gpios %d\n",
+ plat->name, plat->base, plat->ngpios);
+
+ return 0;
+}
+
+static const struct dm_gpio_ops iproc_gpio_ops = {
+ .request = iproc_gpio_request,
+ .direction_input = iproc_gpio_direction_input,
+ .direction_output = iproc_gpio_direction_output,
+ .get_value = iproc_gpio_get_value,
+ .set_value = iproc_gpio_set_value,
+ .get_function = iproc_gpio_get_function,
+};
+
+static const struct udevice_id iproc_gpio_ids[] = {
+ { .compatible = "brcm,iproc-gpio" },
+ { }
+};
+
+U_BOOT_DRIVER(iproc_gpio) = {
+ .name = "iproc_gpio",
+ .id = UCLASS_GPIO,
+ .of_match = iproc_gpio_ids,
+ .ops = &iproc_gpio_ops,
+ .ofdata_to_platdata = iproc_gpio_ofdata_to_platdata,
+ .platdata_auto_alloc_size = sizeof(struct iproc_gpio_platdata),
+};
--
2.17.1
^ permalink raw reply related [flat|nested] 4+ messages in thread
* [PATCH v4 2/2] gpio: do not include <asm/arch/gpio.h> on TARGET_BCMNS3
2020-05-03 16:31 [PATCH v4 0/2] add brcm iproc gpio driver Rayagonda Kokatanur
2020-05-03 16:31 ` [PATCH v4 1/2] drivers: gpio: add broadcom iproc gpio driver support Rayagonda Kokatanur
@ 2020-05-03 16:31 ` Rayagonda Kokatanur
1 sibling, 0 replies; 4+ messages in thread
From: Rayagonda Kokatanur @ 2020-05-03 16:31 UTC (permalink / raw)
To: u-boot
As no gpio.h is defined for this architecture, to avoid
compilation failure, do not include <asm/arch/gpio.h> for
arch bcmns3.
Signed-off-by: Rayagonda Kokatanur <rayagonda.kokatanur@broadcom.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
---
arch/arm/include/asm/gpio.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm/include/asm/gpio.h b/arch/arm/include/asm/gpio.h
index 333e407b66..c067eeb649 100644
--- a/arch/arm/include/asm/gpio.h
+++ b/arch/arm/include/asm/gpio.h
@@ -6,7 +6,7 @@
!defined(CONFIG_ARCH_LS1088A) && !defined(CONFIG_ARCH_ASPEED) && \
!defined(CONFIG_ARCH_LS1012A) && !defined(CONFIG_ARCH_LS1043A) && \
!defined(CONFIG_ARCH_LS1046A) && !defined(CONFIG_ARCH_U8500) && \
- !defined(CONFIG_CORTINA_PLATFORM)
+ !defined(CONFIG_CORTINA_PLATFORM) && !defined(CONFIG_TARGET_BCMNS3)
#include <asm/arch/gpio.h>
#endif
#include <asm-generic/gpio.h>
--
2.17.1
^ permalink raw reply related [flat|nested] 4+ messages in thread
* [PATCH v4 1/2] drivers: gpio: add broadcom iproc gpio driver support
2020-05-03 16:31 ` [PATCH v4 1/2] drivers: gpio: add broadcom iproc gpio driver support Rayagonda Kokatanur
@ 2020-05-04 14:17 ` Simon Glass
0 siblings, 0 replies; 4+ messages in thread
From: Simon Glass @ 2020-05-04 14:17 UTC (permalink / raw)
To: u-boot
Hi Rayagonda,
On Sun, 3 May 2020 at 10:32, Rayagonda Kokatanur
<rayagonda.kokatanur@broadcom.com> wrote:
>
> Add gpio driver support for Broadcom iproc-based socs.
>
> Signed-off-by: Rayagonda Kokatanur <rayagonda.kokatanur@broadcom.com>
> Signed-off-by: Sheetal Tigadoli <sheetal.tigadoli@broadcom.com>
> ---
> drivers/gpio/Kconfig | 11 ++
> drivers/gpio/Makefile | 1 +
> drivers/gpio/iproc_gpio.c | 269 ++++++++++++++++++++++++++++++++++++++
> 3 files changed, 281 insertions(+)
> create mode 100644 drivers/gpio/iproc_gpio.c
>
[..]
> +static int iproc_gpio_ofdata_to_platdata(struct udevice *dev)
> +{
> + struct iproc_gpio_platdata *plat = dev_get_platdata(dev);
> + struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
> + int ret;
> + char name[10];
> +
> + plat->base = dev_read_addr_ptr(dev);
> + if (!plat->base) {
> + debug("%s: Failed to get base address\n", __func__);
> + return -EINVAL;
> + }
> +
> + ret = dev_read_u32(dev, "ngpios", &plat->ngpios);
> + if (ret < 0) {
> + dev_err(dev, "%s: Failed to get ngpios\n", __func__);
> + return ret;
> + }
> +
> + uclass_get_device_by_phandle(UCLASS_PINCTRL, dev, "gpio-ranges",
> + &plat->pinctrl_dev);
Should check return value here.
> +
> + INIT_LIST_HEAD(&plat->gpiomap);
> + ret = iproc_get_gpio_pctrl_mapping(dev);
This is confusing, please drop the !
> + if (ret) {
> + dev_err(dev, "%s: Failed to get gpio to pctrl map ret(%d)\n",
> + __func__, ret);
> + return ret;
> + }
> +
> + snprintf(name, sizeof(name), "GPIO%d", dev->req_seq);
> + plat->name = strdup(name);
Check for error and return -ENOMEM
> +
> + uc_priv->gpio_count = plat->ngpios;
> + uc_priv->bank_name = plat->name;
> +
> + dev_info(dev, ":bank name(%s) base %p, #gpios %d\n",
> + plat->name, plat->base, plat->ngpios);
> +
> + return 0;
> +}
> +
[..]
Regards,
Simon
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2020-05-04 14:17 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-05-03 16:31 [PATCH v4 0/2] add brcm iproc gpio driver Rayagonda Kokatanur
2020-05-03 16:31 ` [PATCH v4 1/2] drivers: gpio: add broadcom iproc gpio driver support Rayagonda Kokatanur
2020-05-04 14:17 ` Simon Glass
2020-05-03 16:31 ` [PATCH v4 2/2] gpio: do not include <asm/arch/gpio.h> on TARGET_BCMNS3 Rayagonda Kokatanur
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