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d508d995d1
Add a clock driver for the PRCM clock controller on the Allwinner A523 family of SoCs, often also used with an "r" prefix or suffix. This just describes the clock gates and reset lines for the few devices that we would need, most prominently the R_I2C device for the PMIC. Signed-off-by: Andre Przywara <andre.przywara@arm.com>
250 lines
6.5 KiB
C
250 lines
6.5 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2018 Amarula Solutions.
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* Author: Jagan Teki <jagan@amarulasolutions.com>
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*/
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#include <clk-uclass.h>
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#include <dm.h>
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#include <errno.h>
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#include <log.h>
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#include <reset.h>
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#include <asm/io.h>
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#include <clk/sunxi.h>
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#include <dm/device-internal.h>
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#include <linux/bitops.h>
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#include <linux/log2.h>
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extern U_BOOT_DRIVER(sunxi_reset);
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static const struct ccu_clk_gate *plat_to_gate(struct ccu_plat *plat,
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unsigned long id)
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{
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if (id >= plat->desc->num_gates)
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return NULL;
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return &plat->desc->gates[id];
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}
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static int sunxi_set_gate(struct clk *clk, bool on)
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{
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struct ccu_plat *plat = dev_get_plat(clk->dev);
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const struct ccu_clk_gate *gate = plat_to_gate(plat, clk->id);
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u32 reg;
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if (gate && (gate->flags & CCU_CLK_F_DUMMY_GATE))
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return 0;
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if (!gate || !(gate->flags & CCU_CLK_F_IS_VALID)) {
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printf("%s: (CLK#%ld) unhandled\n", __func__, clk->id);
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return 0;
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}
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debug("%s: (CLK#%ld) off#0x%x, BIT(%d)\n", __func__,
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clk->id, gate->off, ilog2(gate->bit));
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reg = readl(plat->base + gate->off);
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if (on)
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reg |= gate->bit;
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else
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reg &= ~gate->bit;
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writel(reg, plat->base + gate->off);
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return 0;
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}
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static int sunxi_clk_enable(struct clk *clk)
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{
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return sunxi_set_gate(clk, true);
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}
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static int sunxi_clk_disable(struct clk *clk)
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{
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return sunxi_set_gate(clk, false);
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}
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struct clk_ops sunxi_clk_ops = {
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.enable = sunxi_clk_enable,
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.disable = sunxi_clk_disable,
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};
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static int sunxi_clk_bind(struct udevice *dev)
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{
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/* Reuse the platform data for the reset driver. */
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return device_bind(dev, DM_DRIVER_REF(sunxi_reset), "reset",
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dev_get_plat(dev), dev_ofnode(dev), NULL);
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}
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static int sunxi_clk_probe(struct udevice *dev)
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{
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struct clk_bulk clk_bulk;
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struct reset_ctl_bulk rst_bulk;
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int ret;
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ret = clk_get_bulk(dev, &clk_bulk);
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if (!ret)
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clk_enable_bulk(&clk_bulk);
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ret = reset_get_bulk(dev, &rst_bulk);
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if (!ret)
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reset_deassert_bulk(&rst_bulk);
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return 0;
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}
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static int sunxi_clk_of_to_plat(struct udevice *dev)
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{
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struct ccu_plat *plat = dev_get_plat(dev);
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plat->base = dev_read_addr_ptr(dev);
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if (!plat->base)
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return -ENOMEM;
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plat->desc = (const struct ccu_desc *)dev_get_driver_data(dev);
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if (!plat->desc)
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return -EINVAL;
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return 0;
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}
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extern const struct ccu_desc a10_ccu_desc;
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extern const struct ccu_desc a10s_ccu_desc;
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extern const struct ccu_desc a23_ccu_desc;
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extern const struct ccu_desc a31_ccu_desc;
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extern const struct ccu_desc a31_r_ccu_desc;
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extern const struct ccu_desc a64_ccu_desc;
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extern const struct ccu_desc a80_ccu_desc;
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extern const struct ccu_desc a80_mmc_clk_desc;
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extern const struct ccu_desc a83t_ccu_desc;
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extern const struct ccu_desc d1_ccu_desc;
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extern const struct ccu_desc f1c100s_ccu_desc;
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extern const struct ccu_desc h3_ccu_desc;
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extern const struct ccu_desc h6_ccu_desc;
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extern const struct ccu_desc h616_ccu_desc;
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extern const struct ccu_desc a100_ccu_desc;
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extern const struct ccu_desc h6_r_ccu_desc;
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extern const struct ccu_desc r40_ccu_desc;
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extern const struct ccu_desc v3s_ccu_desc;
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extern const struct ccu_desc a523_ccu_desc;
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extern const struct ccu_desc a523_r_ccu_desc;
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static const struct udevice_id sunxi_clk_ids[] = {
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#ifdef CONFIG_CLK_SUN4I_A10
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{ .compatible = "allwinner,sun4i-a10-ccu",
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.data = (ulong)&a10_ccu_desc },
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#endif
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#ifdef CONFIG_CLK_SUN5I_A10S
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{ .compatible = "allwinner,sun5i-a10s-ccu",
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.data = (ulong)&a10s_ccu_desc },
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{ .compatible = "allwinner,sun5i-a13-ccu",
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.data = (ulong)&a10s_ccu_desc },
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#endif
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#ifdef CONFIG_CLK_SUN6I_A31
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{ .compatible = "allwinner,sun6i-a31-ccu",
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.data = (ulong)&a31_ccu_desc },
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#endif
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#ifdef CONFIG_CLK_SUN4I_A10
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{ .compatible = "allwinner,sun7i-a20-ccu",
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.data = (ulong)&a10_ccu_desc },
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#endif
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#ifdef CONFIG_CLK_SUN8I_A23
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{ .compatible = "allwinner,sun8i-a23-ccu",
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.data = (ulong)&a23_ccu_desc },
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{ .compatible = "allwinner,sun8i-a33-ccu",
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.data = (ulong)&a23_ccu_desc },
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#endif
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#ifdef CONFIG_CLK_SUN8I_A83T
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{ .compatible = "allwinner,sun8i-a83t-ccu",
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.data = (ulong)&a83t_ccu_desc },
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#endif
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#ifdef CONFIG_CLK_SUN6I_A31_R
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{ .compatible = "allwinner,sun8i-a83t-r-ccu",
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.data = (ulong)&a31_r_ccu_desc },
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#endif
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#ifdef CONFIG_CLK_SUN8I_H3
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{ .compatible = "allwinner,sun8i-h3-ccu",
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.data = (ulong)&h3_ccu_desc },
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#endif
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#ifdef CONFIG_CLK_SUN6I_A31_R
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{ .compatible = "allwinner,sun8i-h3-r-ccu",
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.data = (ulong)&a31_r_ccu_desc },
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#endif
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#ifdef CONFIG_CLK_SUN8I_R40
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{ .compatible = "allwinner,sun8i-r40-ccu",
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.data = (ulong)&r40_ccu_desc },
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#endif
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#ifdef CONFIG_CLK_SUN8I_V3S
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{ .compatible = "allwinner,sun8i-v3-ccu",
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.data = (ulong)&v3s_ccu_desc },
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{ .compatible = "allwinner,sun8i-v3s-ccu",
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.data = (ulong)&v3s_ccu_desc },
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#endif
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#ifdef CONFIG_CLK_SUN9I_A80
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{ .compatible = "allwinner,sun9i-a80-ccu",
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.data = (ulong)&a80_ccu_desc },
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{ .compatible = "allwinner,sun9i-a80-mmc-config-clk",
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.data = (ulong)&a80_mmc_clk_desc },
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#endif
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#ifdef CONFIG_CLK_SUN50I_A64
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{ .compatible = "allwinner,sun50i-a64-ccu",
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.data = (ulong)&a64_ccu_desc },
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#endif
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#ifdef CONFIG_CLK_SUN6I_A31_R
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{ .compatible = "allwinner,sun50i-a64-r-ccu",
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.data = (ulong)&a31_r_ccu_desc },
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#endif
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#ifdef CONFIG_CLK_SUN8I_H3
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{ .compatible = "allwinner,sun50i-h5-ccu",
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.data = (ulong)&h3_ccu_desc },
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#endif
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#ifdef CONFIG_CLK_SUN20I_D1
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{ .compatible = "allwinner,sun20i-d1-ccu",
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.data = (ulong)&d1_ccu_desc },
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#endif
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#ifdef CONFIG_CLK_SUN50I_H6
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{ .compatible = "allwinner,sun50i-h6-ccu",
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.data = (ulong)&h6_ccu_desc },
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#endif
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#ifdef CONFIG_CLK_SUN50I_H6_R
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{ .compatible = "allwinner,sun50i-h6-r-ccu",
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.data = (ulong)&h6_r_ccu_desc },
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#endif
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#ifdef CONFIG_CLK_SUN50I_H616
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{ .compatible = "allwinner,sun50i-h616-ccu",
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.data = (ulong)&h616_ccu_desc },
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#endif
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#ifdef CONFIG_CLK_SUN50I_H6_R
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{ .compatible = "allwinner,sun50i-h616-r-ccu",
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.data = (ulong)&h6_r_ccu_desc },
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#endif
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#ifdef CONFIG_CLK_SUN50I_A100
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{ .compatible = "allwinner,sun50i-a100-ccu",
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.data = (ulong)&a100_ccu_desc },
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#endif
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#ifdef CONFIG_CLK_SUNIV_F1C100S
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{ .compatible = "allwinner,suniv-f1c100s-ccu",
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.data = (ulong)&f1c100s_ccu_desc },
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#endif
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#ifdef CONFIG_CLK_SUN55I_A523
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{ .compatible = "allwinner,sun55i-a523-ccu",
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.data = (ulong)&a523_ccu_desc },
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#endif
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#ifdef CONFIG_CLK_SUN55I_A523_R
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{ .compatible = "allwinner,sun55i-a523-r-ccu",
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.data = (ulong)&a523_r_ccu_desc },
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#endif
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{ }
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};
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U_BOOT_DRIVER(sunxi_clk) = {
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.name = "sunxi_clk",
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.id = UCLASS_CLK,
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.of_match = sunxi_clk_ids,
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.bind = sunxi_clk_bind,
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.probe = sunxi_clk_probe,
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.of_to_plat = sunxi_clk_of_to_plat,
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.plat_auto = sizeof(struct ccu_plat),
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.ops = &sunxi_clk_ops,
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};
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