diff options
| -rw-r--r-- | drivers/clk/rockchip/Makefile | 1 | ||||
| -rw-r--r-- | drivers/clk/rockchip/clk-rk3588.c | 120 | ||||
| -rw-r--r-- | drivers/clk/rockchip/clk.c | 102 | ||||
| -rw-r--r-- | drivers/clk/rockchip/clk.h | 40 | ||||
| -rw-r--r-- | drivers/clk/rockchip/gate-link.c | 85 |
5 files changed, 288 insertions, 60 deletions
diff --git a/drivers/clk/rockchip/Makefile b/drivers/clk/rockchip/Makefile index af2ade54a7ef..3fe7616f0ebe 100644 --- a/drivers/clk/rockchip/Makefile +++ b/drivers/clk/rockchip/Makefile @@ -13,6 +13,7 @@ clk-rockchip-y += clk-inverter.o clk-rockchip-y += clk-mmc-phase.o clk-rockchip-y += clk-muxgrf.o clk-rockchip-y += clk-ddr.o +clk-rockchip-y += gate-link.o clk-rockchip-$(CONFIG_RESET_CONTROLLER) += softrst.o obj-$(CONFIG_CLK_PX30) += clk-px30.o diff --git a/drivers/clk/rockchip/clk-rk3588.c b/drivers/clk/rockchip/clk-rk3588.c index 0ffaf639f807..4031733def4e 100644 --- a/drivers/clk/rockchip/clk-rk3588.c +++ b/drivers/clk/rockchip/clk-rk3588.c @@ -12,28 +12,6 @@ #include <dt-bindings/clock/rockchip,rk3588-cru.h> #include "clk.h" -/* - * Recent Rockchip SoCs have a new hardware block called Native Interface - * Unit (NIU), which gates clocks to devices behind them. These effectively - * need two parent clocks. - * - * Downstream enables the linked clock via runtime PM whenever the gate is - * enabled. This implementation uses separate clock nodes for each of the - * linked gate clocks, which leaks parts of the clock tree into DT. - * - * The GATE_LINK macro instead takes the second parent via 'linkname', but - * ignores the information. Once the clock framework is ready to handle it, the - * information should be passed on here. But since these clocks are required to - * access multiple relevant IP blocks, such as PCIe or USB, we mark all linked - * clocks critical until a better solution is available. This will waste some - * power, but avoids leaking implementation details into DT or hanging the - * system. - */ -#define GATE_LINK(_id, cname, pname, linkedclk, f, o, b, gf) \ - GATE(_id, cname, pname, f, o, b, gf) -#define RK3588_LINKED_CLK CLK_IS_CRITICAL - - #define RK3588_GRF_SOC_STATUS0 0x600 #define RK3588_PHYREF_ALT_GATE 0xc38 @@ -266,6 +244,8 @@ static struct rockchip_pll_rate_table rk3588_pll_rates[] = { }, \ } +static struct rockchip_clk_provider *early_ctx; + static struct rockchip_cpuclk_rate_table rk3588_cpub0clk_rates[] __initdata = { RK3588_CPUB01CLK_RATE(2496000000, 1), RK3588_CPUB01CLK_RATE(2400000000, 1), @@ -694,7 +674,7 @@ static struct rockchip_pll_clock rk3588_pll_clks[] __initdata = { RK3588_MODE_CON0, 10, 15, 0, rk3588_pll_rates), }; -static struct rockchip_clk_branch rk3588_clk_branches[] __initdata = { +static struct rockchip_clk_branch rk3588_early_clk_branches[] __initdata = { /* * CRU Clock-Architecture */ @@ -792,10 +772,10 @@ static struct rockchip_clk_branch rk3588_clk_branches[] __initdata = { COMPOSITE(MCLK_GMAC0_OUT, "mclk_gmac0_out", gpll_cpll_p, 0, RK3588_CLKSEL_CON(15), 7, 1, MFLAGS, 0, 7, DFLAGS, RK3588_CLKGATE_CON(5), 3, GFLAGS), - COMPOSITE(REFCLKO25M_ETH0_OUT, "refclko25m_eth0_out", gpll_cpll_p, 0, + COMPOSITE(REFCLKO25M_ETH0_OUT, "refclko25m_eth0_out", gpll_cpll_p, CLK_IS_CRITICAL, RK3588_CLKSEL_CON(15), 15, 1, MFLAGS, 8, 7, DFLAGS, RK3588_CLKGATE_CON(5), 4, GFLAGS), - COMPOSITE(REFCLKO25M_ETH1_OUT, "refclko25m_eth1_out", gpll_cpll_p, 0, + COMPOSITE(REFCLKO25M_ETH1_OUT, "refclko25m_eth1_out", gpll_cpll_p, CLK_IS_CRITICAL, RK3588_CLKSEL_CON(16), 7, 1, MFLAGS, 0, 7, DFLAGS, RK3588_CLKGATE_CON(5), 5, GFLAGS), COMPOSITE(CLK_CIFOUT_OUT, "clk_cifout_out", gpll_cpll_24m_spll_p, 0, @@ -1456,7 +1436,7 @@ static struct rockchip_clk_branch rk3588_clk_branches[] __initdata = { COMPOSITE_NODIV(HCLK_NVM_ROOT, "hclk_nvm_root", mux_200m_100m_50m_24m_p, 0, RK3588_CLKSEL_CON(77), 0, 2, MFLAGS, RK3588_CLKGATE_CON(31), 0, GFLAGS), - COMPOSITE(ACLK_NVM_ROOT, "aclk_nvm_root", gpll_cpll_p, RK3588_LINKED_CLK, + COMPOSITE(ACLK_NVM_ROOT, "aclk_nvm_root", gpll_cpll_p, 0, RK3588_CLKSEL_CON(77), 7, 1, MFLAGS, 2, 5, DFLAGS, RK3588_CLKGATE_CON(31), 1, GFLAGS), GATE(ACLK_EMMC, "aclk_emmc", "aclk_nvm_root", 0, @@ -1685,13 +1665,13 @@ static struct rockchip_clk_branch rk3588_clk_branches[] __initdata = { RK3588_CLKGATE_CON(42), 9, GFLAGS), /* vdpu */ - COMPOSITE(ACLK_VDPU_ROOT, "aclk_vdpu_root", gpll_cpll_aupll_p, RK3588_LINKED_CLK, + COMPOSITE(ACLK_VDPU_ROOT, "aclk_vdpu_root", gpll_cpll_aupll_p, 0, RK3588_CLKSEL_CON(98), 5, 2, MFLAGS, 0, 5, DFLAGS, RK3588_CLKGATE_CON(44), 0, GFLAGS), COMPOSITE_NODIV(ACLK_VDPU_LOW_ROOT, "aclk_vdpu_low_root", mux_400m_200m_100m_24m_p, 0, RK3588_CLKSEL_CON(98), 7, 2, MFLAGS, RK3588_CLKGATE_CON(44), 1, GFLAGS), - COMPOSITE_NODIV(HCLK_VDPU_ROOT, "hclk_vdpu_root", mux_200m_100m_50m_24m_p, RK3588_LINKED_CLK, + COMPOSITE_NODIV(HCLK_VDPU_ROOT, "hclk_vdpu_root", mux_200m_100m_50m_24m_p, 0, RK3588_CLKSEL_CON(98), 9, 2, MFLAGS, RK3588_CLKGATE_CON(44), 2, GFLAGS), COMPOSITE(ACLK_JPEG_DECODER_ROOT, "aclk_jpeg_decoder_root", gpll_cpll_aupll_spll_p, 0, @@ -1742,9 +1722,9 @@ static struct rockchip_clk_branch rk3588_clk_branches[] __initdata = { COMPOSITE(ACLK_RKVENC0_ROOT, "aclk_rkvenc0_root", gpll_cpll_npll_p, 0, RK3588_CLKSEL_CON(102), 7, 2, MFLAGS, 2, 5, DFLAGS, RK3588_CLKGATE_CON(47), 1, GFLAGS), - GATE(HCLK_RKVENC0, "hclk_rkvenc0", "hclk_rkvenc0_root", RK3588_LINKED_CLK, + GATE(HCLK_RKVENC0, "hclk_rkvenc0", "hclk_rkvenc0_root", 0, RK3588_CLKGATE_CON(47), 4, GFLAGS), - GATE(ACLK_RKVENC0, "aclk_rkvenc0", "aclk_rkvenc0_root", RK3588_LINKED_CLK, + GATE(ACLK_RKVENC0, "aclk_rkvenc0", "aclk_rkvenc0_root", 0, RK3588_CLKGATE_CON(47), 5, GFLAGS), COMPOSITE(CLK_RKVENC0_CORE, "clk_rkvenc0_core", gpll_cpll_aupll_npll_p, 0, RK3588_CLKSEL_CON(102), 14, 2, MFLAGS, 9, 5, DFLAGS, @@ -1754,10 +1734,10 @@ static struct rockchip_clk_branch rk3588_clk_branches[] __initdata = { RK3588_CLKGATE_CON(48), 6, GFLAGS), /* vi */ - COMPOSITE(ACLK_VI_ROOT, "aclk_vi_root", gpll_cpll_npll_aupll_spll_p, RK3588_LINKED_CLK, + COMPOSITE(ACLK_VI_ROOT, "aclk_vi_root", gpll_cpll_npll_aupll_spll_p, 0, RK3588_CLKSEL_CON(106), 5, 3, MFLAGS, 0, 5, DFLAGS, RK3588_CLKGATE_CON(49), 0, GFLAGS), - COMPOSITE_NODIV(HCLK_VI_ROOT, "hclk_vi_root", mux_200m_100m_50m_24m_p, RK3588_LINKED_CLK, + COMPOSITE_NODIV(HCLK_VI_ROOT, "hclk_vi_root", mux_200m_100m_50m_24m_p, 0, RK3588_CLKSEL_CON(106), 8, 2, MFLAGS, RK3588_CLKGATE_CON(49), 1, GFLAGS), COMPOSITE_NODIV(PCLK_VI_ROOT, "pclk_vi_root", mux_100m_50m_24m_p, 0, @@ -1927,10 +1907,10 @@ static struct rockchip_clk_branch rk3588_clk_branches[] __initdata = { COMPOSITE(ACLK_VOP_ROOT, "aclk_vop_root", gpll_cpll_dmyaupll_npll_spll_p, 0, RK3588_CLKSEL_CON(110), 5, 3, MFLAGS, 0, 5, DFLAGS, RK3588_CLKGATE_CON(52), 0, GFLAGS), - COMPOSITE_NODIV(ACLK_VOP_LOW_ROOT, "aclk_vop_low_root", mux_400m_200m_100m_24m_p, RK3588_LINKED_CLK, + COMPOSITE_NODIV(ACLK_VOP_LOW_ROOT, "aclk_vop_low_root", mux_400m_200m_100m_24m_p, 0, RK3588_CLKSEL_CON(110), 8, 2, MFLAGS, RK3588_CLKGATE_CON(52), 1, GFLAGS), - COMPOSITE_NODIV(HCLK_VOP_ROOT, "hclk_vop_root", mux_200m_100m_50m_24m_p, RK3588_LINKED_CLK, + COMPOSITE_NODIV(HCLK_VOP_ROOT, "hclk_vop_root", mux_200m_100m_50m_24m_p, 0, RK3588_CLKSEL_CON(110), 10, 2, MFLAGS, RK3588_CLKGATE_CON(52), 2, GFLAGS), COMPOSITE_NODIV(PCLK_VOP_ROOT, "pclk_vop_root", mux_100m_50m_24m_p, 0, @@ -2428,10 +2408,12 @@ static struct rockchip_clk_branch rk3588_clk_branches[] __initdata = { RK3588_CLKGATE_CON(68), 5, GFLAGS), GATE(ACLK_AV1, "aclk_av1", "aclk_av1_pre", 0, RK3588_CLKGATE_CON(68), 2, GFLAGS), +}; +static struct rockchip_clk_branch rk3588_clk_branches[] = { GATE_LINK(ACLK_ISP1_PRE, "aclk_isp1_pre", "aclk_isp1_root", ACLK_VI_ROOT, 0, RK3588_CLKGATE_CON(26), 6, GFLAGS), GATE_LINK(HCLK_ISP1_PRE, "hclk_isp1_pre", "hclk_isp1_root", HCLK_VI_ROOT, 0, RK3588_CLKGATE_CON(26), 8, GFLAGS), - GATE_LINK(HCLK_NVM, "hclk_nvm", "hclk_nvm_root", ACLK_NVM_ROOT, RK3588_LINKED_CLK, RK3588_CLKGATE_CON(31), 2, GFLAGS), + GATE_LINK(HCLK_NVM, "hclk_nvm", "hclk_nvm_root", ACLK_NVM_ROOT, 0, RK3588_CLKGATE_CON(31), 2, GFLAGS), GATE_LINK(ACLK_USB, "aclk_usb", "aclk_usb_root", ACLK_VO1USB_TOP_ROOT, 0, RK3588_CLKGATE_CON(42), 2, GFLAGS), GATE_LINK(HCLK_USB, "hclk_usb", "hclk_usb_root", HCLK_VO1USB_TOP_ROOT, 0, RK3588_CLKGATE_CON(42), 3, GFLAGS), GATE_LINK(ACLK_JPEG_DECODER_PRE, "aclk_jpeg_decoder_pre", "aclk_jpeg_decoder_root", ACLK_VDPU_ROOT, 0, RK3588_CLKGATE_CON(44), 7, GFLAGS), @@ -2443,9 +2425,9 @@ static struct rockchip_clk_branch rk3588_clk_branches[] __initdata = { GATE_LINK(HCLK_RKVDEC1_PRE, "hclk_rkvdec1_pre", "hclk_rkvdec1_root", HCLK_VDPU_ROOT, 0, RK3588_CLKGATE_CON(41), 4, GFLAGS), GATE_LINK(ACLK_RKVDEC1_PRE, "aclk_rkvdec1_pre", "aclk_rkvdec1_root", ACLK_VDPU_ROOT, 0, RK3588_CLKGATE_CON(41), 5, GFLAGS), GATE_LINK(ACLK_HDCP0_PRE, "aclk_hdcp0_pre", "aclk_vo0_root", ACLK_VOP_LOW_ROOT, 0, RK3588_CLKGATE_CON(55), 9, GFLAGS), - GATE_LINK(HCLK_VO0, "hclk_vo0", "hclk_vo0_root", HCLK_VOP_ROOT, RK3588_LINKED_CLK, RK3588_CLKGATE_CON(55), 5, GFLAGS), + GATE_LINK(HCLK_VO0, "hclk_vo0", "hclk_vo0_root", HCLK_VOP_ROOT, 0, RK3588_CLKGATE_CON(55), 5, GFLAGS), GATE_LINK(ACLK_HDCP1_PRE, "aclk_hdcp1_pre", "aclk_hdcp1_root", ACLK_VO1USB_TOP_ROOT, 0, RK3588_CLKGATE_CON(59), 6, GFLAGS), - GATE_LINK(HCLK_VO1, "hclk_vo1", "hclk_vo1_root", HCLK_VO1USB_TOP_ROOT, RK3588_LINKED_CLK, RK3588_CLKGATE_CON(59), 9, GFLAGS), + GATE_LINK(HCLK_VO1, "hclk_vo1", "hclk_vo1_root", HCLK_VO1USB_TOP_ROOT, 0, RK3588_CLKGATE_CON(59), 9, GFLAGS), GATE_LINK(ACLK_AV1_PRE, "aclk_av1_pre", "aclk_av1_root", ACLK_VDPU_ROOT, 0, RK3588_CLKGATE_CON(68), 1, GFLAGS), GATE_LINK(PCLK_AV1_PRE, "pclk_av1_pre", "pclk_av1_root", HCLK_VDPU_ROOT, 0, RK3588_CLKGATE_CON(68), 4, GFLAGS), GATE_LINK(HCLK_SDIO_PRE, "hclk_sdio_pre", "hclk_sdio_root", HCLK_NVM, 0, RK3588_CLKGATE_CON(75), 1, GFLAGS), @@ -2453,26 +2435,31 @@ static struct rockchip_clk_branch rk3588_clk_branches[] __initdata = { GATE_LINK(PCLK_VO1GRF, "pclk_vo1grf", "pclk_vo1_root", HCLK_VO1, CLK_IGNORE_UNUSED, RK3588_CLKGATE_CON(59), 12, GFLAGS), }; -static void __init rk3588_clk_init(struct device_node *np) +static void __init rk3588_clk_early_init(struct device_node *np) { struct rockchip_clk_provider *ctx; - unsigned long clk_nr_clks; + unsigned long clk_nr_clks, max_clk_id1, max_clk_id2; void __iomem *reg_base; - clk_nr_clks = rockchip_clk_find_max_clk_id(rk3588_clk_branches, - ARRAY_SIZE(rk3588_clk_branches)) + 1; + max_clk_id1 = rockchip_clk_find_max_clk_id(rk3588_clk_branches, + ARRAY_SIZE(rk3588_clk_branches)); + max_clk_id2 = rockchip_clk_find_max_clk_id(rk3588_early_clk_branches, + ARRAY_SIZE(rk3588_early_clk_branches)); + clk_nr_clks = max(max_clk_id1, max_clk_id2) + 1; + reg_base = of_iomap(np, 0); if (!reg_base) { pr_err("%s: could not map cru region\n", __func__); return; } - ctx = rockchip_clk_init(np, reg_base, clk_nr_clks); + ctx = rockchip_clk_init_early(np, reg_base, clk_nr_clks); if (IS_ERR(ctx)) { pr_err("%s: rockchip clk init failed\n", __func__); iounmap(reg_base); return; } + early_ctx = ctx; rockchip_clk_register_plls(ctx, rk3588_pll_clks, ARRAY_SIZE(rk3588_pll_clks), @@ -2491,14 +2478,55 @@ static void __init rk3588_clk_init(struct device_node *np) &rk3588_cpub1clk_data, rk3588_cpub1clk_rates, ARRAY_SIZE(rk3588_cpub1clk_rates)); - rockchip_clk_register_branches(ctx, rk3588_clk_branches, - ARRAY_SIZE(rk3588_clk_branches)); + rockchip_clk_register_branches(ctx, rk3588_early_clk_branches, + ARRAY_SIZE(rk3588_early_clk_branches)); + + rockchip_clk_of_add_provider(np, ctx); +} +CLK_OF_DECLARE_DRIVER(rk3588_cru, "rockchip,rk3588-cru", rk3588_clk_early_init); + +static int clk_rk3588_probe(struct platform_device *pdev) +{ + struct rockchip_clk_provider *ctx = early_ctx; + struct device *dev = &pdev->dev; + struct device_node *np = dev->of_node; + + rockchip_clk_register_late_branches(dev, ctx, rk3588_clk_branches, + ARRAY_SIZE(rk3588_clk_branches)); - rk3588_rst_init(np, reg_base); + rockchip_clk_finalize(ctx); + rk3588_rst_init(np, ctx->reg_base); rockchip_register_restart_notifier(ctx, RK3588_GLB_SRST_FST, NULL); + /* + * Re-add clock provider, so that the newly added clocks are also + * re-parented and get their defaults configured. + */ + of_clk_del_provider(np); rockchip_clk_of_add_provider(np, ctx); + + return 0; } -CLK_OF_DECLARE(rk3588_cru, "rockchip,rk3588-cru", rk3588_clk_init); +static const struct of_device_id clk_rk3588_match_table[] = { + { + .compatible = "rockchip,rk3588-cru", + }, + { } +}; + +static struct platform_driver clk_rk3588_driver = { + .probe = clk_rk3588_probe, + .driver = { + .name = "clk-rk3588", + .of_match_table = clk_rk3588_match_table, + .suppress_bind_attrs = true, + }, +}; + +static int __init rockchip_clk_rk3588_drv_register(void) +{ + return platform_driver_register(&clk_rk3588_driver); +} +core_initcall(rockchip_clk_rk3588_drv_register); diff --git a/drivers/clk/rockchip/clk.c b/drivers/clk/rockchip/clk.c index 88629a9abc9c..cbf93ea119a9 100644 --- a/drivers/clk/rockchip/clk.c +++ b/drivers/clk/rockchip/clk.c @@ -19,6 +19,7 @@ #include <linux/clk-provider.h> #include <linux/io.h> #include <linux/mfd/syscon.h> +#include <linux/platform_device.h> #include <linux/regmap.h> #include <linux/reboot.h> @@ -197,12 +198,6 @@ static void rockchip_fractional_approximation(struct clk_hw *hw, clk_fractional_divider_general_approximation(hw, rate, parent_rate, m, n); } -static void rockchip_clk_add_lookup(struct rockchip_clk_provider *ctx, - struct clk *clk, unsigned int id) -{ - ctx->clk_data.clks[id] = clk; -} - static struct clk *rockchip_clk_register_frac_branch( struct rockchip_clk_provider *ctx, const char *name, const char *const *parent_names, u8 num_parents, @@ -292,7 +287,7 @@ static struct clk *rockchip_clk_register_frac_branch( return mux_clk; } - rockchip_clk_add_lookup(ctx, mux_clk, child->id); + rockchip_clk_set_lookup(ctx, mux_clk, child->id); /* notifier on the fraction divider to catch rate changes */ if (frac->mux_frac_idx >= 0) { @@ -359,14 +354,17 @@ static struct clk *rockchip_clk_register_factor_branch(const char *name, return hw->clk; } -struct rockchip_clk_provider *rockchip_clk_init(struct device_node *np, - void __iomem *base, - unsigned long nr_clks) +static struct rockchip_clk_provider *rockchip_clk_init_base( + struct device_node *np, void __iomem *base, + unsigned long nr_clks, bool has_late_clocks) { struct rockchip_clk_provider *ctx; struct clk **clk_table; + struct clk *default_clk_val; int i; + default_clk_val = ERR_PTR(has_late_clocks ? -EPROBE_DEFER : -ENOENT); + ctx = kzalloc(sizeof(struct rockchip_clk_provider), GFP_KERNEL); if (!ctx) return ERR_PTR(-ENOMEM); @@ -376,7 +374,7 @@ struct rockchip_clk_provider *rockchip_clk_init(struct device_node *np, goto err_free; for (i = 0; i < nr_clks; ++i) - clk_table[i] = ERR_PTR(-ENOENT); + clk_table[i] = default_clk_val; ctx->reg_base = base; ctx->clk_data.clks = clk_table; @@ -393,8 +391,33 @@ err_free: kfree(ctx); return ERR_PTR(-ENOMEM); } + +struct rockchip_clk_provider *rockchip_clk_init(struct device_node *np, + void __iomem *base, + unsigned long nr_clks) +{ + return rockchip_clk_init_base(np, base, nr_clks, false); +} EXPORT_SYMBOL_GPL(rockchip_clk_init); +struct rockchip_clk_provider *rockchip_clk_init_early(struct device_node *np, + void __iomem *base, + unsigned long nr_clks) +{ + return rockchip_clk_init_base(np, base, nr_clks, true); +} +EXPORT_SYMBOL_GPL(rockchip_clk_init_early); + +void rockchip_clk_finalize(struct rockchip_clk_provider *ctx) +{ + int i; + + for (i = 0; i < ctx->clk_data.clk_num; ++i) + if (ctx->clk_data.clks[i] == ERR_PTR(-EPROBE_DEFER)) + ctx->clk_data.clks[i] = ERR_PTR(-ENOENT); +} +EXPORT_SYMBOL_GPL(rockchip_clk_finalize); + void rockchip_clk_of_add_provider(struct device_node *np, struct rockchip_clk_provider *ctx) { @@ -424,7 +447,7 @@ void rockchip_clk_register_plls(struct rockchip_clk_provider *ctx, continue; } - rockchip_clk_add_lookup(ctx, clk, list->id); + rockchip_clk_set_lookup(ctx, clk, list->id); } } EXPORT_SYMBOL_GPL(rockchip_clk_register_plls); @@ -446,6 +469,29 @@ unsigned long rockchip_clk_find_max_clk_id(struct rockchip_clk_branch *list, } EXPORT_SYMBOL_GPL(rockchip_clk_find_max_clk_id); +static struct platform_device *rockchip_clk_register_gate_link( + struct device *parent_dev, + struct rockchip_clk_provider *ctx, + struct rockchip_clk_branch *clkbr) +{ + struct rockchip_gate_link_platdata gate_link_pdata = { + .ctx = ctx, + .clkbr = clkbr, + }; + + struct platform_device_info pdevinfo = { + .parent = parent_dev, + .name = "rockchip-gate-link-clk", + .id = clkbr->id, + .fwnode = dev_fwnode(parent_dev), + .of_node_reused = true, + .data = &gate_link_pdata, + .size_data = sizeof(gate_link_pdata), + }; + + return platform_device_register_full(&pdevinfo); +} + void rockchip_clk_register_branches(struct rockchip_clk_provider *ctx, struct rockchip_clk_branch *list, unsigned int nr_clk) @@ -571,6 +617,9 @@ void rockchip_clk_register_branches(struct rockchip_clk_provider *ctx, list->div_width, list->div_flags, ctx->reg_base, &ctx->lock); break; + case branch_linked_gate: + /* must be registered late, fall-through for error message */ + break; } /* none of the cases above matched */ @@ -586,11 +635,36 @@ void rockchip_clk_register_branches(struct rockchip_clk_provider *ctx, continue; } - rockchip_clk_add_lookup(ctx, clk, list->id); + rockchip_clk_set_lookup(ctx, clk, list->id); } } EXPORT_SYMBOL_GPL(rockchip_clk_register_branches); +void rockchip_clk_register_late_branches(struct device *dev, + struct rockchip_clk_provider *ctx, + struct rockchip_clk_branch *list, + unsigned int nr_clk) +{ + unsigned int idx; + + for (idx = 0; idx < nr_clk; idx++, list++) { + struct platform_device *pdev = NULL; + + switch (list->branch_type) { + case branch_linked_gate: + pdev = rockchip_clk_register_gate_link(dev, ctx, list); + break; + default: + dev_err(dev, "unknown clock type %d\n", list->branch_type); + break; + } + + if (!pdev) + dev_err(dev, "failed to register device for clock %s\n", list->name); + } +} +EXPORT_SYMBOL_GPL(rockchip_clk_register_late_branches); + void rockchip_clk_register_armclk(struct rockchip_clk_provider *ctx, unsigned int lookup_id, const char *name, const char *const *parent_names, @@ -610,7 +684,7 @@ void rockchip_clk_register_armclk(struct rockchip_clk_provider *ctx, return; } - rockchip_clk_add_lookup(ctx, clk, lookup_id); + rockchip_clk_set_lookup(ctx, clk, lookup_id); } EXPORT_SYMBOL_GPL(rockchip_clk_register_armclk); diff --git a/drivers/clk/rockchip/clk.h b/drivers/clk/rockchip/clk.h index f1957e1c1178..9b37d44b9e5d 100644 --- a/drivers/clk/rockchip/clk.h +++ b/drivers/clk/rockchip/clk.h @@ -570,6 +570,7 @@ enum rockchip_clk_branch_type { branch_divider, branch_fraction_divider, branch_gate, + branch_linked_gate, branch_mmc, branch_inverter, branch_factor, @@ -597,6 +598,7 @@ struct rockchip_clk_branch { int gate_offset; u8 gate_shift; u8 gate_flags; + unsigned int linked_clk_id; struct rockchip_clk_branch *child; }; @@ -895,6 +897,20 @@ struct rockchip_clk_branch { .gate_flags = gf, \ } +#define GATE_LINK(_id, cname, pname, linkedclk, f, o, b, gf) \ + { \ + .id = _id, \ + .branch_type = branch_linked_gate, \ + .name = cname, \ + .parent_names = (const char *[]){ pname }, \ + .linked_clk_id = linkedclk, \ + .num_parents = 1, \ + .flags = f, \ + .gate_offset = o, \ + .gate_shift = b, \ + .gate_flags = gf, \ + } + #define MMC(_id, cname, pname, offset, shift) \ { \ .id = _id, \ @@ -1022,8 +1038,28 @@ struct rockchip_clk_branch { #define SGRF_GATE(_id, cname, pname) \ FACTOR(_id, cname, pname, 0, 1, 1) +static inline struct clk *rockchip_clk_get_lookup(struct rockchip_clk_provider *ctx, + unsigned int id) +{ + return ctx->clk_data.clks[id]; +} + +static inline void rockchip_clk_set_lookup(struct rockchip_clk_provider *ctx, + struct clk *clk, unsigned int id) +{ + ctx->clk_data.clks[id] = clk; +} + +struct rockchip_gate_link_platdata { + struct rockchip_clk_provider *ctx; + struct rockchip_clk_branch *clkbr; +}; + struct rockchip_clk_provider *rockchip_clk_init(struct device_node *np, void __iomem *base, unsigned long nr_clks); +struct rockchip_clk_provider *rockchip_clk_init_early(struct device_node *np, + void __iomem *base, unsigned long nr_clks); +void rockchip_clk_finalize(struct rockchip_clk_provider *ctx); void rockchip_clk_of_add_provider(struct device_node *np, struct rockchip_clk_provider *ctx); unsigned long rockchip_clk_find_max_clk_id(struct rockchip_clk_branch *list, @@ -1031,6 +1067,10 @@ unsigned long rockchip_clk_find_max_clk_id(struct rockchip_clk_branch *list, void rockchip_clk_register_branches(struct rockchip_clk_provider *ctx, struct rockchip_clk_branch *list, unsigned int nr_clk); +void rockchip_clk_register_late_branches(struct device *dev, + struct rockchip_clk_provider *ctx, + struct rockchip_clk_branch *list, + unsigned int nr_clk); void rockchip_clk_register_plls(struct rockchip_clk_provider *ctx, struct rockchip_pll_clock *pll_list, unsigned int nr_pll, int grf_lock_offset); diff --git a/drivers/clk/rockchip/gate-link.c b/drivers/clk/rockchip/gate-link.c new file mode 100644 index 000000000000..cd0f7a2d30ab --- /dev/null +++ b/drivers/clk/rockchip/gate-link.c @@ -0,0 +1,85 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (c) 2024 Collabora Ltd. + * Author: Sebastian Reichel <sebastian.reichel@collabora.com> + */ + +#include <linux/clk.h> +#include <linux/platform_device.h> +#include <linux/pm_clock.h> +#include <linux/pm_runtime.h> +#include <linux/property.h> +#include "clk.h" + +static int rk_clk_gate_link_register(struct device *dev, + struct rockchip_clk_provider *ctx, + struct rockchip_clk_branch *clkbr) +{ + unsigned long flags = clkbr->flags | CLK_SET_RATE_PARENT; + struct clk *clk; + + clk = clk_register_gate(dev, clkbr->name, clkbr->parent_names[0], + flags, ctx->reg_base + clkbr->gate_offset, + clkbr->gate_shift, clkbr->gate_flags, + &ctx->lock); + + if (IS_ERR(clk)) + return PTR_ERR(clk); + + rockchip_clk_set_lookup(ctx, clk, clkbr->id); + return 0; +} + +static int rk_clk_gate_link_probe(struct platform_device *pdev) +{ + struct rockchip_gate_link_platdata *pdata; + struct device *dev = &pdev->dev; + struct clk *linked_clk; + int ret; + + pdata = dev_get_platdata(dev); + if (!pdata) + return dev_err_probe(dev, -ENODEV, "missing platform data"); + + ret = devm_pm_runtime_enable(dev); + if (ret) + return ret; + + ret = devm_pm_clk_create(dev); + if (ret) + return ret; + + linked_clk = rockchip_clk_get_lookup(pdata->ctx, pdata->clkbr->linked_clk_id); + ret = pm_clk_add_clk(dev, linked_clk); + if (ret) + return ret; + + ret = rk_clk_gate_link_register(dev, pdata->ctx, pdata->clkbr); + if (ret) + goto err; + + return 0; + +err: + pm_clk_remove_clk(dev, linked_clk); + return ret; +} + +static const struct dev_pm_ops rk_clk_gate_link_pm_ops = { + SET_RUNTIME_PM_OPS(pm_clk_suspend, pm_clk_resume, NULL) +}; + +static struct platform_driver rk_clk_gate_link_driver = { + .probe = rk_clk_gate_link_probe, + .driver = { + .name = "rockchip-gate-link-clk", + .pm = &rk_clk_gate_link_pm_ops, + .suppress_bind_attrs = true, + }, +}; + +static int __init rk_clk_gate_link_drv_register(void) +{ + return platform_driver_register(&rk_clk_gate_link_driver); +} +core_initcall(rk_clk_gate_link_drv_register); |