Add initial clock driver for Allwinner A64.
Implement USB clock enable and disable functions for OHCI, EHCI, OTG and USBPHY gate and clock registers via ccu clk gate table.
Signed-off-by: Jagan Teki jagan@amarulasolutions.com Acked-by: Maxime Ripard maxime.ripard@bootlin.com --- arch/arm/include/asm/arch-sunxi/ccu.h | 65 +++++++++++++++++++++++ drivers/clk/Kconfig | 1 + drivers/clk/Makefile | 1 + drivers/clk/sunxi/Kconfig | 18 +++++++ drivers/clk/sunxi/Makefile | 9 ++++ drivers/clk/sunxi/clk_a64.c | 46 +++++++++++++++++ drivers/clk/sunxi/clk_sunxi.c | 74 +++++++++++++++++++++++++++ 7 files changed, 214 insertions(+) create mode 100644 arch/arm/include/asm/arch-sunxi/ccu.h create mode 100644 drivers/clk/sunxi/Kconfig create mode 100644 drivers/clk/sunxi/Makefile create mode 100644 drivers/clk/sunxi/clk_a64.c create mode 100644 drivers/clk/sunxi/clk_sunxi.c
diff --git a/arch/arm/include/asm/arch-sunxi/ccu.h b/arch/arm/include/asm/arch-sunxi/ccu.h new file mode 100644 index 0000000000..24efe0ab0a --- /dev/null +++ b/arch/arm/include/asm/arch-sunxi/ccu.h @@ -0,0 +1,65 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (C) 2018 Amarula Solutions. + * Author: Jagan Teki jagan@amarulasolutions.com + */ + +#ifndef _ASM_ARCH_CCU_H +#define _ASM_ARCH_CCU_H + +/** + * enum ccu_flags - ccu clock flags + * + * @CCU_CLK_F_IS_VALID: is given clock gate is valid? + */ +enum ccu_flags { + CCU_CLK_F_IS_VALID = BIT(0), +}; + +/** + * struct ccu_clk_gate - ccu clock gate + * @off: gate offset + * @bit: gate bit + * @flags: ccu clock gate flags + */ +struct ccu_clk_gate { + u16 off; + u32 bit; + enum ccu_flags flags; +}; + +#define GATE(_off, _bit) { \ + .off = _off, \ + .bit = _bit, \ + .flags = CCU_CLK_F_IS_VALID, \ +} + +/** + * struct ccu_desc - clock control unit descriptor + * + * @gates: clock gates + */ +struct ccu_desc { + const struct ccu_clk_gate *gates; +}; + +/** + * struct ccu_priv - sunxi clock control unit + * + * @base: base address + * @desc: ccu descriptor + */ +struct ccu_priv { + void *base; + const struct ccu_desc *desc; +}; + +/** + * sunxi_clk_probe - common sunxi clock probe + * @dev: clock device + */ +int sunxi_clk_probe(struct udevice *dev); + +extern struct clk_ops sunxi_clk_ops; + +#endif /* _ASM_ARCH_CCU_H */ diff --git a/drivers/clk/Kconfig b/drivers/clk/Kconfig index eadf7f8250..51c931b906 100644 --- a/drivers/clk/Kconfig +++ b/drivers/clk/Kconfig @@ -104,6 +104,7 @@ source "drivers/clk/imx/Kconfig" source "drivers/clk/mvebu/Kconfig" source "drivers/clk/owl/Kconfig" source "drivers/clk/renesas/Kconfig" +source "drivers/clk/sunxi/Kconfig" source "drivers/clk/tegra/Kconfig" source "drivers/clk/uniphier/Kconfig"
diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile index 9acbb1a650..6a4ff9143b 100644 --- a/drivers/clk/Makefile +++ b/drivers/clk/Makefile @@ -22,6 +22,7 @@ obj-$(CONFIG_CLK_HSDK) += clk-hsdk-cgu.o obj-$(CONFIG_CLK_MPC83XX) += mpc83xx_clk.o obj-$(CONFIG_CLK_OWL) += owl/ obj-$(CONFIG_CLK_RENESAS) += renesas/ +obj-$(CONFIG_ARCH_SUNXI) += sunxi/ obj-$(CONFIG_CLK_STM32F) += clk_stm32f.o obj-$(CONFIG_CLK_STM32MP1) += clk_stm32mp1.o obj-$(CONFIG_CLK_UNIPHIER) += uniphier/ diff --git a/drivers/clk/sunxi/Kconfig b/drivers/clk/sunxi/Kconfig new file mode 100644 index 0000000000..bf5ecb3801 --- /dev/null +++ b/drivers/clk/sunxi/Kconfig @@ -0,0 +1,18 @@ +config CLK_SUNXI + bool "Clock support for Allwinner SoCs" + depends on CLK && ARCH_SUNXI + default y + help + This enables support for common clock driver API on Allwinner + SoCs. + +if CLK_SUNXI + +config CLK_SUN50I_A64 + bool "Clock driver for Allwinner A64" + default MACH_SUN50I + help + This enables common clock driver support for platforms based + on Allwinner A64 SoC. + +endif # CLK_SUNXI diff --git a/drivers/clk/sunxi/Makefile b/drivers/clk/sunxi/Makefile new file mode 100644 index 0000000000..fb20d28333 --- /dev/null +++ b/drivers/clk/sunxi/Makefile @@ -0,0 +1,9 @@ +# +# Copyright (C) 2018 Amarula Solutions. +# +# SPDX-License-Identifier: GPL-2.0+ +# + +obj-$(CONFIG_CLK_SUNXI) += clk_sunxi.o + +obj-$(CONFIG_CLK_SUN50I_A64) += clk_a64.o diff --git a/drivers/clk/sunxi/clk_a64.c b/drivers/clk/sunxi/clk_a64.c new file mode 100644 index 0000000000..803a2f711d --- /dev/null +++ b/drivers/clk/sunxi/clk_a64.c @@ -0,0 +1,46 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (C) 2018 Amarula Solutions. + * Author: Jagan Teki jagan@amarulasolutions.com + */ + +#include <common.h> +#include <clk-uclass.h> +#include <dm.h> +#include <errno.h> +#include <asm/arch/ccu.h> +#include <dt-bindings/clock/sun50i-a64-ccu.h> + +static const struct ccu_clk_gate a64_gates[] = { + [CLK_BUS_OTG] = GATE(0x060, BIT(23)), + [CLK_BUS_EHCI0] = GATE(0x060, BIT(24)), + [CLK_BUS_EHCI1] = GATE(0x060, BIT(25)), + [CLK_BUS_OHCI0] = GATE(0x060, BIT(28)), + [CLK_BUS_OHCI1] = GATE(0x060, BIT(29)), + + [CLK_USB_PHY0] = GATE(0x0cc, BIT(8)), + [CLK_USB_PHY1] = GATE(0x0cc, BIT(9)), + [CLK_USB_HSIC] = GATE(0x0cc, BIT(10)), + [CLK_USB_HSIC_12M] = GATE(0x0cc, BIT(11)), + [CLK_USB_OHCI0] = GATE(0x0cc, BIT(16)), + [CLK_USB_OHCI1] = GATE(0x0cc, BIT(17)), +}; + +static const struct ccu_desc a64_ccu_desc = { + .gates = a64_gates, +}; + +static const struct udevice_id a64_ccu_ids[] = { + { .compatible = "allwinner,sun50i-a64-ccu", + .data = (ulong)&a64_ccu_desc }, + { } +}; + +U_BOOT_DRIVER(clk_sun50i_a64) = { + .name = "sun50i_a64_ccu", + .id = UCLASS_CLK, + .of_match = a64_ccu_ids, + .priv_auto_alloc_size = sizeof(struct ccu_priv), + .ops = &sunxi_clk_ops, + .probe = sunxi_clk_probe, +}; diff --git a/drivers/clk/sunxi/clk_sunxi.c b/drivers/clk/sunxi/clk_sunxi.c new file mode 100644 index 0000000000..62ce2994e4 --- /dev/null +++ b/drivers/clk/sunxi/clk_sunxi.c @@ -0,0 +1,74 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (C) 2018 Amarula Solutions. + * Author: Jagan Teki jagan@amarulasolutions.com + */ + +#include <common.h> +#include <clk-uclass.h> +#include <dm.h> +#include <errno.h> +#include <asm/io.h> +#include <asm/arch/ccu.h> +#include <linux/log2.h> + +static const struct ccu_clk_gate *priv_to_gate(struct ccu_priv *priv, + unsigned long id) +{ + return &priv->desc->gates[id]; +} + +static int sunxi_set_gate(struct clk *clk, bool on) +{ + struct ccu_priv *priv = dev_get_priv(clk->dev); + const struct ccu_clk_gate *gate = priv_to_gate(priv, clk->id); + u32 reg; + + if (!(gate->flags & CCU_CLK_F_IS_VALID)) { + printf("%s: (CLK#%ld) unhandled\n", __func__, clk->id); + return 0; + } + + debug("%s: (CLK#%ld) off#0x%x, BIT(%d)\n", __func__, + clk->id, gate->off, ilog2(gate->bit)); + + reg = readl(priv->base + gate->off); + if (on) + reg |= gate->bit; + else + reg &= ~gate->bit; + + writel(reg, priv->base + gate->off); + + return 0; +} + +static int sunxi_clk_enable(struct clk *clk) +{ + return sunxi_set_gate(clk, true); +} + +static int sunxi_clk_disable(struct clk *clk) +{ + return sunxi_set_gate(clk, false); +} + +struct clk_ops sunxi_clk_ops = { + .enable = sunxi_clk_enable, + .disable = sunxi_clk_disable, +}; + +int sunxi_clk_probe(struct udevice *dev) +{ + struct ccu_priv *priv = dev_get_priv(dev); + + priv->base = dev_read_addr_ptr(dev); + if (!priv->base) + return -ENOMEM; + + priv->desc = (const struct ccu_desc *)dev_get_driver_data(dev); + if (!priv->desc) + return -EINVAL; + + return 0; +}