Kever,
On 15 Dec 2017, at 10:02, Kever Yang kever.yang@rock-chips.com wrote:
From: Elaine Zhang zhangqing@rock-chips.com
Create driver to support all Rockchip SoCs soft reset. Example of usage: i2c driver: ret = reset_get_by_name(dev, "i2c", &reset_ctl); if (ret) { error("reset_get_by_name() failed: %d\n", ret); }
reset_assert(&reset_ctl); udelay(50); reset_deassert(&reset_ctl);
i2c dts node: resets = <&cru SRST_P_I2C1>, <&cru SRST_I2C1>; reset-names = "p_i2c", "i2c";
Signed-off-by: Elaine Zhang zhangqing@rock-chips.com Signed-off-by: Kever Yang kever.yang@rock-chips.com
This series still causes build-failures to a number of non-Rockchip boards: https://travis-ci.org/ptomsich/u-boot-rockchip/builds/316832184
Again (or rather: still), the build of rockchip-reset.o (why is this even built for other boards?) fails for the affected targets.
Please resolve.
Thanks, Philipp.
Changes in v3: None Changes in v2:
- fix Kconfig more than 80 length
- use MACRO for reset bits in one reg
- use rkclr/set_reg for reg access
- add rockchip_reset_bind()
- use dev_read_addr_size() instead of fdtdec_
drivers/reset/Kconfig | 9 +++ drivers/reset/Makefile | 1 + drivers/reset/reset-rockchip.c | 133 +++++++++++++++++++++++++++++++++++++++++ 3 files changed, 143 insertions(+) create mode 100644 drivers/reset/reset-rockchip.c
diff --git a/drivers/reset/Kconfig b/drivers/reset/Kconfig index ce46e27..97a78d7 100644 --- a/drivers/reset/Kconfig +++ b/drivers/reset/Kconfig @@ -74,4 +74,13 @@ config AST2500_RESET resets that are supported by watchdog. The main limitation though is that some reset signals, like I2C or MISC reset multiple devices.
+config RESET_ROCKCHIP
- bool "Reset controller driver for Rockchip SoCs"
- depends on DM_RESET && CLK
- default y
- help
Support for reset controller on rockchip SoC. The main limitationthough is that some reset signals, like I2C or MISC reset multipledevices.endmenu diff --git a/drivers/reset/Makefile b/drivers/reset/Makefile index 252cefe..7d7e080 100644 --- a/drivers/reset/Makefile +++ b/drivers/reset/Makefile @@ -12,3 +12,4 @@ obj-$(CONFIG_TEGRA186_RESET) += tegra186-reset.o obj-$(CONFIG_RESET_BCM6345) += reset-bcm6345.o obj-$(CONFIG_RESET_UNIPHIER) += reset-uniphier.o obj-$(CONFIG_AST2500_RESET) += ast2500-reset.o +obj-$(CONFIG_RESET_ROCKCHIP) += reset-rockchip.o diff --git a/drivers/reset/reset-rockchip.c b/drivers/reset/reset-rockchip.c new file mode 100644 index 0000000..01047a2 --- /dev/null +++ b/drivers/reset/reset-rockchip.c @@ -0,0 +1,133 @@ +/*
- (C) Copyright 2017 Rockchip Electronics Co., Ltd
- SPDX-License-Identifier: GPL-2.0
- */
+#include <common.h> +#include <dm.h> +#include <reset-uclass.h> +#include <linux/io.h> +#include <asm/arch/hardware.h> +#include <dm/lists.h> +/*
- Each reg has 16 bits reset signal for devices
- Note: Not including rk2818 and older SoCs
- */
+#define ROCKCHIP_RESET_NUM_IN_REG 16
+struct rockchip_reset_priv {
- void __iomem *base;
- /* Rockchip reset reg locate at cru controller */
- u32 reset_reg_offset;
- /* Rockchip reset reg number */
- u32 reset_reg_num;
+};
+static int rockchip_reset_request(struct reset_ctl *reset_ctl) +{
- struct rockchip_reset_priv *priv = dev_get_priv(reset_ctl->dev);
- debug("%s(reset_ctl=%p) (dev=%p, id=%lu) (reg_num=%d)\n", __func__,
reset_ctl, reset_ctl->dev, reset_ctl->id, priv->reset_reg_num);- if (reset_ctl->id / ROCKCHIP_RESET_NUM_IN_REG >= priv->reset_reg_num)
return -EINVAL;- return 0;
+}
+static int rockchip_reset_free(struct reset_ctl *reset_ctl) +{
- debug("%s(reset_ctl=%p) (dev=%p, id=%lu)\n", __func__, reset_ctl,
reset_ctl->dev, reset_ctl->id);- return 0;
+}
+static int rockchip_reset_assert(struct reset_ctl *reset_ctl) +{
- struct rockchip_reset_priv *priv = dev_get_priv(reset_ctl->dev);
- int bank = reset_ctl->id / ROCKCHIP_RESET_NUM_IN_REG;
- int offset = reset_ctl->id % ROCKCHIP_RESET_NUM_IN_REG;
- debug("%s(reset_ctl=%p) (dev=%p, id=%lu) (reg_addr=%p)\n", __func__,
reset_ctl, reset_ctl->dev, reset_ctl->id,priv->base + (bank * 4));- rk_setreg(priv->base + (bank * 4), BIT(offset));
- return 0;
+}
+static int rockchip_reset_deassert(struct reset_ctl *reset_ctl) +{
- struct rockchip_reset_priv *priv = dev_get_priv(reset_ctl->dev);
- int bank = reset_ctl->id / ROCKCHIP_RESET_NUM_IN_REG;
- int offset = reset_ctl->id % ROCKCHIP_RESET_NUM_IN_REG;
- debug("%s(reset_ctl=%p) (dev=%p, id=%lu) (reg_addr=%p)\n", __func__,
reset_ctl, reset_ctl->dev, reset_ctl->id,priv->base + (bank * 4));- rk_clrreg(priv->base + (bank * 4), BIT(offset));
- return 0;
+}
+struct reset_ops rockchip_reset_ops = {
- .request = rockchip_reset_request,
- .free = rockchip_reset_free,
- .rst_assert = rockchip_reset_assert,
- .rst_deassert = rockchip_reset_deassert,
+};
+static int rockchip_reset_probe(struct udevice *dev) +{
- struct rockchip_reset_priv *priv = dev_get_priv(dev);
- fdt_addr_t addr;
- fdt_size_t size;
- addr = dev_read_addr_size(dev, "reg", &size);
- if (addr == FDT_ADDR_T_NONE)
return -EINVAL;- if ((priv->reset_reg_offset == 0) && (priv->reset_reg_num == 0))
return -EINVAL;- addr += priv->reset_reg_offset;
- priv->base = ioremap(addr, size);
- debug("%s(base=%p) (reg_offset=%x, reg_num=%d)\n", __func__,
priv->base, priv->reset_reg_offset, priv->reset_reg_num);- return 0;
+}
+int rockchip_reset_bind(struct udevice *pdev, u32 reg_offset, u32 reg_number) +{
- struct udevice *rst_dev;
- struct rockchip_reset_priv *priv;
- int ret;
ret = device_bind_driver_to_node(pdev, "rockchip_reset", "reset",dev_ofnode(pdev), &rst_dev);- if (ret) {
debug("Warning: No rockchip reset driver: ret=%d\n", ret);return ret;- }
- priv = malloc(sizeof(struct rockchip_reset_priv));
- priv->reset_reg_offset = reg_offset;
- priv->reset_reg_num = reg_number;
- rst_dev->priv = priv;
- return 0;
+}
+U_BOOT_DRIVER(rockchip_reset) = {
- .name = "rockchip_reset",
- .id = UCLASS_RESET,
- .probe = rockchip_reset_probe,
- .ops = &rockchip_reset_ops,
- .priv_auto_alloc_size = sizeof(struct rockchip_reset_priv),
+};
1.9.1