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authorLibravatar Linus Torvalds <torvalds@linux-foundation.org>2023-02-21 18:24:12 -0800
committerLibravatar Linus Torvalds <torvalds@linux-foundation.org>2023-02-21 18:24:12 -0800
commit5b7c4cabbb65f5c469464da6c5f614cbd7f730f2 (patch)
treecc5c2d0a898769fd59549594fedb3ee6f84e59a0 /drivers/clk/sunxi/clk-sunxi.c
downloadlinux-5b7c4cabbb65f5c469464da6c5f614cbd7f730f2.tar.gz
linux-5b7c4cabbb65f5c469464da6c5f614cbd7f730f2.zip
Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextgrafted
Pull networking updates from Jakub Kicinski: "Core: - Add dedicated kmem_cache for typical/small skb->head, avoid having to access struct page at kfree time, and improve memory use. - Introduce sysctl to set default RPS configuration for new netdevs. - Define Netlink protocol specification format which can be used to describe messages used by each family and auto-generate parsers. Add tools for generating kernel data structures and uAPI headers. - Expose all net/core sysctls inside netns. - Remove 4s sleep in netpoll if carrier is instantly detected on boot. - Add configurable limit of MDB entries per port, and port-vlan. - Continue populating drop reasons throughout the stack. - Retire a handful of legacy Qdiscs and classifiers. Protocols: - Support IPv4 big TCP (TSO frames larger than 64kB). - Add IP_LOCAL_PORT_RANGE socket option, to control local port range on socket by socket basis. - Track and report in procfs number of MPTCP sockets used. - Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path manager. - IPv6: don't check net.ipv6.route.max_size and rely on garbage collection to free memory (similarly to IPv4). - Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986). - ICMP: add per-rate limit counters. - Add support for user scanning requests in ieee802154. - Remove static WEP support. - Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate reporting. - WiFi 7 EHT channel puncturing support (client & AP). BPF: - Add a rbtree data structure following the "next-gen data structure" precedent set by recently added linked list, that is, by using kfunc + kptr instead of adding a new BPF map type. - Expose XDP hints via kfuncs with initial support for RX hash and timestamp metadata. - Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to better support decap on GRE tunnel devices not operating in collect metadata. - Improve x86 JIT's codegen for PROBE_MEM runtime error checks. - Remove the need for trace_printk_lock for bpf_trace_printk and bpf_trace_vprintk helpers. - Extend libbpf's bpf_tracing.h support for tracing arguments of kprobes/uprobes and syscall as a special case. - Significantly reduce the search time for module symbols by livepatch and BPF. - Enable cpumasks to be used as kptrs, which is useful for tracing programs tracking which tasks end up running on which CPUs in different time intervals. - Add support for BPF trampoline on s390x and riscv64. - Add capability to export the XDP features supported by the NIC. - Add __bpf_kfunc tag for marking kernel functions as kfuncs. - Add cgroup.memory=nobpf kernel parameter option to disable BPF memory accounting for container environments. Netfilter: - Remove the CLUSTERIP target. It has been marked as obsolete for years, and we still have WARN splats wrt races of the out-of-band /proc interface installed by this target. - Add 'destroy' commands to nf_tables. They are identical to the existing 'delete' commands, but do not return an error if the referenced object (set, chain, rule...) did not exist. Driver API: - Improve cpumask_local_spread() locality to help NICs set the right IRQ affinity on AMD platforms. - Separate C22 and C45 MDIO bus transactions more clearly. - Introduce new DCB table to control DSCP rewrite on egress. - Support configuration of Physical Layer Collision Avoidance (PLCA) Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of shared medium Ethernet. - Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing preemption of low priority frames by high priority frames. - Add support for controlling MACSec offload using netlink SET. - Rework devlink instance refcounts to allow registration and de-registration under the instance lock. Split the code into multiple files, drop some of the unnecessarily granular locks and factor out common parts of netlink operation handling. - Add TX frame aggregation parameters (for USB drivers). - Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning messages with notifications for debug. - Allow offloading of UDP NEW connections via act_ct. - Add support for per action HW stats in TC. - Support hardware miss to TC action (continue processing in SW from a specific point in the action chain). - Warn if old Wireless Extension user space interface is used with modern cfg80211/mac80211 drivers. Do not support Wireless Extensions for Wi-Fi 7 devices at all. Everyone should switch to using nl80211 interface instead. - Improve the CAN bit timing configuration. Use extack to return error messages directly to user space, update the SJW handling, including the definition of a new default value that will benefit CAN-FD controllers, by increasing their oscillator tolerance. New hardware / drivers: - Ethernet: - nVidia BlueField-3 support (control traffic driver) - Ethernet support for imx93 SoCs - Motorcomm yt8531 gigabit Ethernet PHY - onsemi NCN26000 10BASE-T1S PHY (with support for PLCA) - Microchip LAN8841 PHY (incl. cable diagnostics and PTP) - Amlogic gxl MDIO mux - WiFi: - RealTek RTL8188EU (rtl8xxxu) - Qualcomm Wi-Fi 7 devices (ath12k) - CAN: - Renesas R-Car V4H Drivers: - Bluetooth: - Set Per Platform Antenna Gain (PPAG) for Intel controllers. - Ethernet NICs: - Intel (1G, igc): - support TSN / Qbv / packet scheduling features of i226 model - Intel (100G, ice): - use GNSS subsystem instead of TTY - multi-buffer XDP support - extend support for GPIO pins to E823 devices - nVidia/Mellanox: - update the shared buffer configuration on PFC commands - implement PTP adjphase function for HW offset control - TC support for Geneve and GRE with VF tunnel offload - more efficient crypto key management method - multi-port eswitch support - Netronome/Corigine: - add DCB IEEE support - support IPsec offloading for NFP3800 - Freescale/NXP (enetc): - support XDP_REDIRECT for XDP non-linear buffers - improve reconfig, avoid link flap and waiting for idle - support MAC Merge layer - Other NICs: - sfc/ef100: add basic devlink support for ef100 - ionic: rx_push mode operation (writing descriptors via MMIO) - bnxt: use the auxiliary bus abstraction for RDMA - r8169: disable ASPM and reset bus in case of tx timeout - cpsw: support QSGMII mode for J721e CPSW9G - cpts: support pulse-per-second output - ngbe: add an mdio bus driver - usbnet: optimize usbnet_bh() by avoiding unnecessary queuing - r8152: handle devices with FW with NCM support - amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation - virtio-net: support multi buffer XDP - virtio/vsock: replace virtio_vsock_pkt with sk_buff - tsnep: XDP support - Ethernet high-speed switches: - nVidia/Mellanox (mlxsw): - add support for latency TLV (in FW control messages) - Microchip (sparx5): - separate explicit and implicit traffic forwarding rules, make the implicit rules always active - add support for egress DSCP rewrite - IS0 VCAP support (Ingress Classification) - IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS etc.) - ES2 VCAP support (Egress Access Control) - support for Per-Stream Filtering and Policing (802.1Q, 8.6.5.1) - Ethernet embedded switches: - Marvell (mv88e6xxx): - add MAB (port auth) offload support - enable PTP receive for mv88e6390 - NXP (ocelot): - support MAC Merge layer - support for the the vsc7512 internal copper phys - Microchip: - lan9303: convert to PHYLINK - lan966x: support TC flower filter statistics - lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x - lan937x: support Credit Based Shaper configuration - ksz9477: support Energy Efficient Ethernet - other: - qca8k: convert to regmap read/write API, use bulk operations - rswitch: Improve TX timestamp accuracy - Intel WiFi (iwlwifi): - EHT (Wi-Fi 7) rate reporting - STEP equalizer support: transfer some STEP (connection to radio on platforms with integrated wifi) related parameters from the BIOS to the firmware. - Qualcomm 802.11ax WiFi (ath11k): - IPQ5018 support - Fine Timing Measurement (FTM) responder role support - channel 177 support - MediaTek WiFi (mt76): - per-PHY LED support - mt7996: EHT (Wi-Fi 7) support - Wireless Ethernet Dispatch (WED) reset support - switch to using page pool allocator - RealTek WiFi (rtw89): - support new version of Bluetooth co-existance - Mobile: - rmnet: support TX aggregation" * tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits) page_pool: add a comment explaining the fragment counter usage net: ethtool: fix __ethtool_dev_mm_supported() implementation ethtool: pse-pd: Fix double word in comments xsk: add linux/vmalloc.h to xsk.c sefltests: netdevsim: wait for devlink instance after netns removal selftest: fib_tests: Always cleanup before exit net/mlx5e: Align IPsec ASO result memory to be as required by hardware net/mlx5e: TC, Set CT miss to the specific ct action instance net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG net/mlx5: Refactor tc miss handling to a single function net/mlx5: Kconfig: Make tc offload depend on tc skb extension net/sched: flower: Support hardware miss to tc action net/sched: flower: Move filter handle initialization earlier net/sched: cls_api: Support hardware miss to tc action net/sched: Rename user cookie and act cookie sfc: fix builds without CONFIG_RTC_LIB sfc: clean up some inconsistent indentings net/mlx4_en: Introduce flexible array to silence overflow warning net: lan966x: Fix possible deadlock inside PTP net/ulp: Remove redundant ->clone() test in inet_clone_ulp(). ...
Diffstat (limited to 'drivers/clk/sunxi/clk-sunxi.c')
-rw-r--r--drivers/clk/sunxi/clk-sunxi.c1167
1 files changed, 1167 insertions, 0 deletions
diff --git a/drivers/clk/sunxi/clk-sunxi.c b/drivers/clk/sunxi/clk-sunxi.c
new file mode 100644
index 000000000..5fe7049ea
--- /dev/null
+++ b/drivers/clk/sunxi/clk-sunxi.c
@@ -0,0 +1,1167 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright 2013 Emilio López
+ *
+ * Emilio López <emilio@elopez.com.ar>
+ */
+
+#include <linux/clk.h>
+#include <linux/clk-provider.h>
+#include <linux/clkdev.h>
+#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/reset-controller.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/log2.h>
+
+#include "clk-factors.h"
+
+static DEFINE_SPINLOCK(clk_lock);
+
+/* Maximum number of parents our clocks have */
+#define SUNXI_MAX_PARENTS 5
+
+/*
+ * sun4i_get_pll1_factors() - calculates n, k, m, p factors for PLL1
+ * PLL1 rate is calculated as follows
+ * rate = (parent_rate * n * (k + 1) >> p) / (m + 1);
+ * parent_rate is always 24Mhz
+ */
+
+static void sun4i_get_pll1_factors(struct factors_request *req)
+{
+ u8 div;
+
+ /* Normalize value to a 6M multiple */
+ div = req->rate / 6000000;
+ req->rate = 6000000 * div;
+
+ /* m is always zero for pll1 */
+ req->m = 0;
+
+ /* k is 1 only on these cases */
+ if (req->rate >= 768000000 || req->rate == 42000000 ||
+ req->rate == 54000000)
+ req->k = 1;
+ else
+ req->k = 0;
+
+ /* p will be 3 for divs under 10 */
+ if (div < 10)
+ req->p = 3;
+
+ /* p will be 2 for divs between 10 - 20 and odd divs under 32 */
+ else if (div < 20 || (div < 32 && (div & 1)))
+ req->p = 2;
+
+ /* p will be 1 for even divs under 32, divs under 40 and odd pairs
+ * of divs between 40-62 */
+ else if (div < 40 || (div < 64 && (div & 2)))
+ req->p = 1;
+
+ /* any other entries have p = 0 */
+ else
+ req->p = 0;
+
+ /* calculate a suitable n based on k and p */
+ div <<= req->p;
+ div /= (req->k + 1);
+ req->n = div / 4;
+}
+
+/*
+ * sun6i_a31_get_pll1_factors() - calculates n, k and m factors for PLL1
+ * PLL1 rate is calculated as follows
+ * rate = parent_rate * (n + 1) * (k + 1) / (m + 1);
+ * parent_rate should always be 24MHz
+ */
+static void sun6i_a31_get_pll1_factors(struct factors_request *req)
+{
+ /*
+ * We can operate only on MHz, this will make our life easier
+ * later.
+ */
+ u32 freq_mhz = req->rate / 1000000;
+ u32 parent_freq_mhz = req->parent_rate / 1000000;
+
+ /*
+ * Round down the frequency to the closest multiple of either
+ * 6 or 16
+ */
+ u32 round_freq_6 = rounddown(freq_mhz, 6);
+ u32 round_freq_16 = round_down(freq_mhz, 16);
+
+ if (round_freq_6 > round_freq_16)
+ freq_mhz = round_freq_6;
+ else
+ freq_mhz = round_freq_16;
+
+ req->rate = freq_mhz * 1000000;
+
+ /* If the frequency is a multiple of 32 MHz, k is always 3 */
+ if (!(freq_mhz % 32))
+ req->k = 3;
+ /* If the frequency is a multiple of 9 MHz, k is always 2 */
+ else if (!(freq_mhz % 9))
+ req->k = 2;
+ /* If the frequency is a multiple of 8 MHz, k is always 1 */
+ else if (!(freq_mhz % 8))
+ req->k = 1;
+ /* Otherwise, we don't use the k factor */
+ else
+ req->k = 0;
+
+ /*
+ * If the frequency is a multiple of 2 but not a multiple of
+ * 3, m is 3. This is the first time we use 6 here, yet we
+ * will use it on several other places.
+ * We use this number because it's the lowest frequency we can
+ * generate (with n = 0, k = 0, m = 3), so every other frequency
+ * somehow relates to this frequency.
+ */
+ if ((freq_mhz % 6) == 2 || (freq_mhz % 6) == 4)
+ req->m = 2;
+ /*
+ * If the frequency is a multiple of 6MHz, but the factor is
+ * odd, m will be 3
+ */
+ else if ((freq_mhz / 6) & 1)
+ req->m = 3;
+ /* Otherwise, we end up with m = 1 */
+ else
+ req->m = 1;
+
+ /* Calculate n thanks to the above factors we already got */
+ req->n = freq_mhz * (req->m + 1) / ((req->k + 1) * parent_freq_mhz)
+ - 1;
+
+ /*
+ * If n end up being outbound, and that we can still decrease
+ * m, do it.
+ */
+ if ((req->n + 1) > 31 && (req->m + 1) > 1) {
+ req->n = (req->n + 1) / 2 - 1;
+ req->m = (req->m + 1) / 2 - 1;
+ }
+}
+
+/*
+ * sun8i_a23_get_pll1_factors() - calculates n, k, m, p factors for PLL1
+ * PLL1 rate is calculated as follows
+ * rate = (parent_rate * (n + 1) * (k + 1) >> p) / (m + 1);
+ * parent_rate is always 24Mhz
+ */
+
+static void sun8i_a23_get_pll1_factors(struct factors_request *req)
+{
+ u8 div;
+
+ /* Normalize value to a 6M multiple */
+ div = req->rate / 6000000;
+ req->rate = 6000000 * div;
+
+ /* m is always zero for pll1 */
+ req->m = 0;
+
+ /* k is 1 only on these cases */
+ if (req->rate >= 768000000 || req->rate == 42000000 ||
+ req->rate == 54000000)
+ req->k = 1;
+ else
+ req->k = 0;
+
+ /* p will be 2 for divs under 20 and odd divs under 32 */
+ if (div < 20 || (div < 32 && (div & 1)))
+ req->p = 2;
+
+ /* p will be 1 for even divs under 32, divs under 40 and odd pairs
+ * of divs between 40-62 */
+ else if (div < 40 || (div < 64 && (div & 2)))
+ req->p = 1;
+
+ /* any other entries have p = 0 */
+ else
+ req->p = 0;
+
+ /* calculate a suitable n based on k and p */
+ div <<= req->p;
+ div /= (req->k + 1);
+ req->n = div / 4 - 1;
+}
+
+/*
+ * sun4i_get_pll5_factors() - calculates n, k factors for PLL5
+ * PLL5 rate is calculated as follows
+ * rate = parent_rate * n * (k + 1)
+ * parent_rate is always 24Mhz
+ */
+
+static void sun4i_get_pll5_factors(struct factors_request *req)
+{
+ u8 div;
+
+ /* Normalize value to a parent_rate multiple (24M) */
+ div = req->rate / req->parent_rate;
+ req->rate = req->parent_rate * div;
+
+ if (div < 31)
+ req->k = 0;
+ else if (div / 2 < 31)
+ req->k = 1;
+ else if (div / 3 < 31)
+ req->k = 2;
+ else
+ req->k = 3;
+
+ req->n = DIV_ROUND_UP(div, (req->k + 1));
+}
+
+/*
+ * sun6i_a31_get_pll6_factors() - calculates n, k factors for A31 PLL6x2
+ * PLL6x2 rate is calculated as follows
+ * rate = parent_rate * (n + 1) * (k + 1)
+ * parent_rate is always 24Mhz
+ */
+
+static void sun6i_a31_get_pll6_factors(struct factors_request *req)
+{
+ u8 div;
+
+ /* Normalize value to a parent_rate multiple (24M) */
+ div = req->rate / req->parent_rate;
+ req->rate = req->parent_rate * div;
+
+ req->k = div / 32;
+ if (req->k > 3)
+ req->k = 3;
+
+ req->n = DIV_ROUND_UP(div, (req->k + 1)) - 1;
+}
+
+/*
+ * sun5i_a13_get_ahb_factors() - calculates m, p factors for AHB
+ * AHB rate is calculated as follows
+ * rate = parent_rate >> p
+ */
+
+static void sun5i_a13_get_ahb_factors(struct factors_request *req)
+{
+ u32 div;
+
+ /* divide only */
+ if (req->parent_rate < req->rate)
+ req->rate = req->parent_rate;
+
+ /*
+ * user manual says valid speed is 8k ~ 276M, but tests show it
+ * can work at speeds up to 300M, just after reparenting to pll6
+ */
+ if (req->rate < 8000)
+ req->rate = 8000;
+ if (req->rate > 300000000)
+ req->rate = 300000000;
+
+ div = order_base_2(DIV_ROUND_UP(req->parent_rate, req->rate));
+
+ /* p = 0 ~ 3 */
+ if (div > 3)
+ div = 3;
+
+ req->rate = req->parent_rate >> div;
+
+ req->p = div;
+}
+
+#define SUN6I_AHB1_PARENT_PLL6 3
+
+/*
+ * sun6i_a31_get_ahb_factors() - calculates m, p factors for AHB
+ * AHB rate is calculated as follows
+ * rate = parent_rate >> p
+ *
+ * if parent is pll6, then
+ * parent_rate = pll6 rate / (m + 1)
+ */
+
+static void sun6i_get_ahb1_factors(struct factors_request *req)
+{
+ u8 div, calcp, calcm = 1;
+
+ /*
+ * clock can only divide, so we will never be able to achieve
+ * frequencies higher than the parent frequency
+ */
+ if (req->parent_rate && req->rate > req->parent_rate)
+ req->rate = req->parent_rate;
+
+ div = DIV_ROUND_UP(req->parent_rate, req->rate);
+
+ /* calculate pre-divider if parent is pll6 */
+ if (req->parent_index == SUN6I_AHB1_PARENT_PLL6) {
+ if (div < 4)
+ calcp = 0;
+ else if (div / 2 < 4)
+ calcp = 1;
+ else if (div / 4 < 4)
+ calcp = 2;
+ else
+ calcp = 3;
+
+ calcm = DIV_ROUND_UP(div, 1 << calcp);
+ } else {
+ calcp = __roundup_pow_of_two(div);
+ calcp = calcp > 3 ? 3 : calcp;
+ }
+
+ req->rate = (req->parent_rate / calcm) >> calcp;
+ req->p = calcp;
+ req->m = calcm - 1;
+}
+
+/*
+ * sun6i_ahb1_recalc() - calculates AHB clock rate from m, p factors and
+ * parent index
+ */
+static void sun6i_ahb1_recalc(struct factors_request *req)
+{
+ req->rate = req->parent_rate;
+
+ /* apply pre-divider first if parent is pll6 */
+ if (req->parent_index == SUN6I_AHB1_PARENT_PLL6)
+ req->rate /= req->m + 1;
+
+ /* clk divider */
+ req->rate >>= req->p;
+}
+
+/*
+ * sun4i_get_apb1_factors() - calculates m, p factors for APB1
+ * APB1 rate is calculated as follows
+ * rate = (parent_rate >> p) / (m + 1);
+ */
+
+static void sun4i_get_apb1_factors(struct factors_request *req)
+{
+ u8 calcm, calcp;
+ int div;
+
+ if (req->parent_rate < req->rate)
+ req->rate = req->parent_rate;
+
+ div = DIV_ROUND_UP(req->parent_rate, req->rate);
+
+ /* Invalid rate! */
+ if (div > 32)
+ return;
+
+ if (div <= 4)
+ calcp = 0;
+ else if (div <= 8)
+ calcp = 1;
+ else if (div <= 16)
+ calcp = 2;
+ else
+ calcp = 3;
+
+ calcm = (div >> calcp) - 1;
+
+ req->rate = (req->parent_rate >> calcp) / (calcm + 1);
+ req->m = calcm;
+ req->p = calcp;
+}
+
+
+
+
+/*
+ * sun7i_a20_get_out_factors() - calculates m, p factors for CLK_OUT_A/B
+ * CLK_OUT rate is calculated as follows
+ * rate = (parent_rate >> p) / (m + 1);
+ */
+
+static void sun7i_a20_get_out_factors(struct factors_request *req)
+{
+ u8 div, calcm, calcp;
+
+ /* These clocks can only divide, so we will never be able to achieve
+ * frequencies higher than the parent frequency */
+ if (req->rate > req->parent_rate)
+ req->rate = req->parent_rate;
+
+ div = DIV_ROUND_UP(req->parent_rate, req->rate);
+
+ if (div < 32)
+ calcp = 0;
+ else if (div / 2 < 32)
+ calcp = 1;
+ else if (div / 4 < 32)
+ calcp = 2;
+ else
+ calcp = 3;
+
+ calcm = DIV_ROUND_UP(div, 1 << calcp);
+
+ req->rate = (req->parent_rate >> calcp) / calcm;
+ req->m = calcm - 1;
+ req->p = calcp;
+}
+
+/*
+ * sunxi_factors_clk_setup() - Setup function for factor clocks
+ */
+
+static const struct clk_factors_config sun4i_pll1_config = {
+ .nshift = 8,
+ .nwidth = 5,
+ .kshift = 4,
+ .kwidth = 2,
+ .mshift = 0,
+ .mwidth = 2,
+ .pshift = 16,
+ .pwidth = 2,
+};
+
+static const struct clk_factors_config sun6i_a31_pll1_config = {
+ .nshift = 8,
+ .nwidth = 5,
+ .kshift = 4,
+ .kwidth = 2,
+ .mshift = 0,
+ .mwidth = 2,
+ .n_start = 1,
+};
+
+static const struct clk_factors_config sun8i_a23_pll1_config = {
+ .nshift = 8,
+ .nwidth = 5,
+ .kshift = 4,
+ .kwidth = 2,
+ .mshift = 0,
+ .mwidth = 2,
+ .pshift = 16,
+ .pwidth = 2,
+ .n_start = 1,
+};
+
+static const struct clk_factors_config sun4i_pll5_config = {
+ .nshift = 8,
+ .nwidth = 5,
+ .kshift = 4,
+ .kwidth = 2,
+};
+
+static const struct clk_factors_config sun6i_a31_pll6_config = {
+ .nshift = 8,
+ .nwidth = 5,
+ .kshift = 4,
+ .kwidth = 2,
+ .n_start = 1,
+};
+
+static const struct clk_factors_config sun5i_a13_ahb_config = {
+ .pshift = 4,
+ .pwidth = 2,
+};
+
+static const struct clk_factors_config sun6i_ahb1_config = {
+ .mshift = 6,
+ .mwidth = 2,
+ .pshift = 4,
+ .pwidth = 2,
+};
+
+static const struct clk_factors_config sun4i_apb1_config = {
+ .mshift = 0,
+ .mwidth = 5,
+ .pshift = 16,
+ .pwidth = 2,
+};
+
+/* user manual says "n" but it's really "p" */
+static const struct clk_factors_config sun7i_a20_out_config = {
+ .mshift = 8,
+ .mwidth = 5,
+ .pshift = 20,
+ .pwidth = 2,
+};
+
+static const struct factors_data sun4i_pll1_data __initconst = {
+ .enable = 31,
+ .table = &sun4i_pll1_config,
+ .getter = sun4i_get_pll1_factors,
+};
+
+static const struct factors_data sun6i_a31_pll1_data __initconst = {
+ .enable = 31,
+ .table = &sun6i_a31_pll1_config,
+ .getter = sun6i_a31_get_pll1_factors,
+};
+
+static const struct factors_data sun8i_a23_pll1_data __initconst = {
+ .enable = 31,
+ .table = &sun8i_a23_pll1_config,
+ .getter = sun8i_a23_get_pll1_factors,
+};
+
+static const struct factors_data sun7i_a20_pll4_data __initconst = {
+ .enable = 31,
+ .table = &sun4i_pll5_config,
+ .getter = sun4i_get_pll5_factors,
+};
+
+static const struct factors_data sun4i_pll5_data __initconst = {
+ .enable = 31,
+ .table = &sun4i_pll5_config,
+ .getter = sun4i_get_pll5_factors,
+};
+
+static const struct factors_data sun6i_a31_pll6_data __initconst = {
+ .enable = 31,
+ .table = &sun6i_a31_pll6_config,
+ .getter = sun6i_a31_get_pll6_factors,
+};
+
+static const struct factors_data sun5i_a13_ahb_data __initconst = {
+ .mux = 6,
+ .muxmask = BIT(1) | BIT(0),
+ .table = &sun5i_a13_ahb_config,
+ .getter = sun5i_a13_get_ahb_factors,
+};
+
+static const struct factors_data sun6i_ahb1_data __initconst = {
+ .mux = 12,
+ .muxmask = BIT(1) | BIT(0),
+ .table = &sun6i_ahb1_config,
+ .getter = sun6i_get_ahb1_factors,
+ .recalc = sun6i_ahb1_recalc,
+};
+
+static const struct factors_data sun4i_apb1_data __initconst = {
+ .mux = 24,
+ .muxmask = BIT(1) | BIT(0),
+ .table = &sun4i_apb1_config,
+ .getter = sun4i_get_apb1_factors,
+};
+
+static const struct factors_data sun7i_a20_out_data __initconst = {
+ .enable = 31,
+ .mux = 24,
+ .muxmask = BIT(1) | BIT(0),
+ .table = &sun7i_a20_out_config,
+ .getter = sun7i_a20_get_out_factors,
+};
+
+static struct clk * __init sunxi_factors_clk_setup(struct device_node *node,
+ const struct factors_data *data)
+{
+ void __iomem *reg;
+
+ reg = of_iomap(node, 0);
+ if (!reg) {
+ pr_err("Could not get registers for factors-clk: %pOFn\n",
+ node);
+ return NULL;
+ }
+
+ return sunxi_factors_register(node, data, &clk_lock, reg);
+}
+
+static void __init sun4i_pll1_clk_setup(struct device_node *node)
+{
+ sunxi_factors_clk_setup(node, &sun4i_pll1_data);
+}
+CLK_OF_DECLARE(sun4i_pll1, "allwinner,sun4i-a10-pll1-clk",
+ sun4i_pll1_clk_setup);
+
+static void __init sun6i_pll1_clk_setup(struct device_node *node)
+{
+ sunxi_factors_clk_setup(node, &sun6i_a31_pll1_data);
+}
+CLK_OF_DECLARE(sun6i_pll1, "allwinner,sun6i-a31-pll1-clk",
+ sun6i_pll1_clk_setup);
+
+static void __init sun8i_pll1_clk_setup(struct device_node *node)
+{
+ sunxi_factors_clk_setup(node, &sun8i_a23_pll1_data);
+}
+CLK_OF_DECLARE(sun8i_pll1, "allwinner,sun8i-a23-pll1-clk",
+ sun8i_pll1_clk_setup);
+
+static void __init sun7i_pll4_clk_setup(struct device_node *node)
+{
+ sunxi_factors_clk_setup(node, &sun7i_a20_pll4_data);
+}
+CLK_OF_DECLARE(sun7i_pll4, "allwinner,sun7i-a20-pll4-clk",
+ sun7i_pll4_clk_setup);
+
+static void __init sun5i_ahb_clk_setup(struct device_node *node)
+{
+ sunxi_factors_clk_setup(node, &sun5i_a13_ahb_data);
+}
+CLK_OF_DECLARE(sun5i_ahb, "allwinner,sun5i-a13-ahb-clk",
+ sun5i_ahb_clk_setup);
+
+static void __init sun6i_ahb1_clk_setup(struct device_node *node)
+{
+ sunxi_factors_clk_setup(node, &sun6i_ahb1_data);
+}
+CLK_OF_DECLARE(sun6i_a31_ahb1, "allwinner,sun6i-a31-ahb1-clk",
+ sun6i_ahb1_clk_setup);
+
+static void __init sun4i_apb1_clk_setup(struct device_node *node)
+{
+ sunxi_factors_clk_setup(node, &sun4i_apb1_data);
+}
+CLK_OF_DECLARE(sun4i_apb1, "allwinner,sun4i-a10-apb1-clk",
+ sun4i_apb1_clk_setup);
+
+static void __init sun7i_out_clk_setup(struct device_node *node)
+{
+ sunxi_factors_clk_setup(node, &sun7i_a20_out_data);
+}
+CLK_OF_DECLARE(sun7i_out, "allwinner,sun7i-a20-out-clk",
+ sun7i_out_clk_setup);
+
+
+/*
+ * sunxi_mux_clk_setup() - Setup function for muxes
+ */
+
+#define SUNXI_MUX_GATE_WIDTH 2
+
+struct mux_data {
+ u8 shift;
+};
+
+static const struct mux_data sun4i_cpu_mux_data __initconst = {
+ .shift = 16,
+};
+
+static const struct mux_data sun6i_a31_ahb1_mux_data __initconst = {
+ .shift = 12,
+};
+
+static const struct mux_data sun8i_h3_ahb2_mux_data __initconst = {
+ .shift = 0,
+};
+
+static struct clk * __init sunxi_mux_clk_setup(struct device_node *node,
+ const struct mux_data *data,
+ unsigned long flags)
+{
+ struct clk *clk;
+ const char *clk_name = node->name;
+ const char *parents[SUNXI_MAX_PARENTS];
+ void __iomem *reg;
+ int i;
+
+ reg = of_iomap(node, 0);
+ if (!reg) {
+ pr_err("Could not map registers for mux-clk: %pOF\n", node);
+ return NULL;
+ }
+
+ i = of_clk_parent_fill(node, parents, SUNXI_MAX_PARENTS);
+ if (of_property_read_string(node, "clock-output-names", &clk_name)) {
+ pr_err("%s: could not read clock-output-names from \"%pOF\"\n",
+ __func__, node);
+ goto out_unmap;
+ }
+
+ clk = clk_register_mux(NULL, clk_name, parents, i,
+ CLK_SET_RATE_PARENT | flags, reg,
+ data->shift, SUNXI_MUX_GATE_WIDTH,
+ 0, &clk_lock);
+
+ if (IS_ERR(clk)) {
+ pr_err("%s: failed to register mux clock %s: %ld\n", __func__,
+ clk_name, PTR_ERR(clk));
+ goto out_unmap;
+ }
+
+ if (of_clk_add_provider(node, of_clk_src_simple_get, clk)) {
+ pr_err("%s: failed to add clock provider for %s\n",
+ __func__, clk_name);
+ clk_unregister_divider(clk);
+ goto out_unmap;
+ }
+
+ return clk;
+out_unmap:
+ iounmap(reg);
+ return NULL;
+}
+
+static void __init sun4i_cpu_clk_setup(struct device_node *node)
+{
+ /* Protect CPU clock */
+ sunxi_mux_clk_setup(node, &sun4i_cpu_mux_data, CLK_IS_CRITICAL);
+}
+CLK_OF_DECLARE(sun4i_cpu, "allwinner,sun4i-a10-cpu-clk",
+ sun4i_cpu_clk_setup);
+
+static void __init sun6i_ahb1_mux_clk_setup(struct device_node *node)
+{
+ sunxi_mux_clk_setup(node, &sun6i_a31_ahb1_mux_data, 0);
+}
+CLK_OF_DECLARE(sun6i_ahb1_mux, "allwinner,sun6i-a31-ahb1-mux-clk",
+ sun6i_ahb1_mux_clk_setup);
+
+static void __init sun8i_ahb2_clk_setup(struct device_node *node)
+{
+ sunxi_mux_clk_setup(node, &sun8i_h3_ahb2_mux_data, 0);
+}
+CLK_OF_DECLARE(sun8i_ahb2, "allwinner,sun8i-h3-ahb2-clk",
+ sun8i_ahb2_clk_setup);
+
+
+/*
+ * sunxi_divider_clk_setup() - Setup function for simple divider clocks
+ */
+
+struct div_data {
+ u8 shift;
+ u8 pow;
+ u8 width;
+ const struct clk_div_table *table;
+};
+
+static const struct div_data sun4i_axi_data __initconst = {
+ .shift = 0,
+ .pow = 0,
+ .width = 2,
+};
+
+static const struct clk_div_table sun8i_a23_axi_table[] __initconst = {
+ { .val = 0, .div = 1 },
+ { .val = 1, .div = 2 },
+ { .val = 2, .div = 3 },
+ { .val = 3, .div = 4 },
+ { .val = 4, .div = 4 },
+ { .val = 5, .div = 4 },
+ { .val = 6, .div = 4 },
+ { .val = 7, .div = 4 },
+ { } /* sentinel */
+};
+
+static const struct div_data sun8i_a23_axi_data __initconst = {
+ .width = 3,
+ .table = sun8i_a23_axi_table,
+};
+
+static const struct div_data sun4i_ahb_data __initconst = {
+ .shift = 4,
+ .pow = 1,
+ .width = 2,
+};
+
+static const struct clk_div_table sun4i_apb0_table[] __initconst = {
+ { .val = 0, .div = 2 },
+ { .val = 1, .div = 2 },
+ { .val = 2, .div = 4 },
+ { .val = 3, .div = 8 },
+ { } /* sentinel */
+};
+
+static const struct div_data sun4i_apb0_data __initconst = {
+ .shift = 8,
+ .pow = 1,
+ .width = 2,
+ .table = sun4i_apb0_table,
+};
+
+static void __init sunxi_divider_clk_setup(struct device_node *node,
+ const struct div_data *data)
+{
+ struct clk *clk;
+ const char *clk_name = node->name;
+ const char *clk_parent;
+ void __iomem *reg;
+
+ reg = of_iomap(node, 0);
+ if (!reg) {
+ pr_err("Could not map registers for mux-clk: %pOF\n", node);
+ return;
+ }
+
+ clk_parent = of_clk_get_parent_name(node, 0);
+
+ if (of_property_read_string(node, "clock-output-names", &clk_name)) {
+ pr_err("%s: could not read clock-output-names from \"%pOF\"\n",
+ __func__, node);
+ goto out_unmap;
+ }
+
+ clk = clk_register_divider_table(NULL, clk_name, clk_parent, 0,
+ reg, data->shift, data->width,
+ data->pow ? CLK_DIVIDER_POWER_OF_TWO : 0,
+ data->table, &clk_lock);
+ if (IS_ERR(clk)) {
+ pr_err("%s: failed to register divider clock %s: %ld\n",
+ __func__, clk_name, PTR_ERR(clk));
+ goto out_unmap;
+ }
+
+ if (of_clk_add_provider(node, of_clk_src_simple_get, clk)) {
+ pr_err("%s: failed to add clock provider for %s\n",
+ __func__, clk_name);
+ goto out_unregister;
+ }
+
+ if (clk_register_clkdev(clk, clk_name, NULL)) {
+ of_clk_del_provider(node);
+ goto out_unregister;
+ }
+
+ return;
+out_unregister:
+ clk_unregister_divider(clk);
+
+out_unmap:
+ iounmap(reg);
+}
+
+static void __init sun4i_ahb_clk_setup(struct device_node *node)
+{
+ sunxi_divider_clk_setup(node, &sun4i_ahb_data);
+}
+CLK_OF_DECLARE(sun4i_ahb, "allwinner,sun4i-a10-ahb-clk",
+ sun4i_ahb_clk_setup);
+
+static void __init sun4i_apb0_clk_setup(struct device_node *node)
+{
+ sunxi_divider_clk_setup(node, &sun4i_apb0_data);
+}
+CLK_OF_DECLARE(sun4i_apb0, "allwinner,sun4i-a10-apb0-clk",
+ sun4i_apb0_clk_setup);
+
+static void __init sun4i_axi_clk_setup(struct device_node *node)
+{
+ sunxi_divider_clk_setup(node, &sun4i_axi_data);
+}
+CLK_OF_DECLARE(sun4i_axi, "allwinner,sun4i-a10-axi-clk",
+ sun4i_axi_clk_setup);
+
+static void __init sun8i_axi_clk_setup(struct device_node *node)
+{
+ sunxi_divider_clk_setup(node, &sun8i_a23_axi_data);
+}
+CLK_OF_DECLARE(sun8i_axi, "allwinner,sun8i-a23-axi-clk",
+ sun8i_axi_clk_setup);
+
+
+
+/*
+ * sunxi_gates_clk_setup() - Setup function for leaf gates on clocks
+ */
+
+#define SUNXI_GATES_MAX_SIZE 64
+
+struct gates_data {
+ DECLARE_BITMAP(mask, SUNXI_GATES_MAX_SIZE);
+};
+
+/*
+ * sunxi_divs_clk_setup() helper data
+ */
+
+#define SUNXI_DIVS_MAX_QTY 4
+#define SUNXI_DIVISOR_WIDTH 2
+
+struct divs_data {
+ const struct factors_data *factors; /* data for the factor clock */
+ int ndivs; /* number of outputs */
+ /*
+ * List of outputs. Refer to the diagram for sunxi_divs_clk_setup():
+ * self or base factor clock refers to the output from the pll
+ * itself. The remaining refer to fixed or configurable divider
+ * outputs.
+ */
+ struct {
+ u8 self; /* is it the base factor clock? (only one) */
+ u8 fixed; /* is it a fixed divisor? if not... */
+ struct clk_div_table *table; /* is it a table based divisor? */
+ u8 shift; /* otherwise it's a normal divisor with this shift */
+ u8 pow; /* is it power-of-two based? */
+ u8 gate; /* is it independently gateable? */
+ bool critical;
+ } div[SUNXI_DIVS_MAX_QTY];
+};
+
+static struct clk_div_table pll6_sata_tbl[] = {
+ { .val = 0, .div = 6, },
+ { .val = 1, .div = 12, },
+ { .val = 2, .div = 18, },
+ { .val = 3, .div = 24, },
+ { } /* sentinel */
+};
+
+static const struct divs_data pll5_divs_data __initconst = {
+ .factors = &sun4i_pll5_data,
+ .ndivs = 2,
+ .div = {
+ /* Protect PLL5_DDR */
+ { .shift = 0, .pow = 0, .critical = true }, /* M, DDR */
+ { .shift = 16, .pow = 1, }, /* P, other */
+ /* No output for the base factor clock */
+ }
+};
+
+static const struct divs_data pll6_divs_data __initconst = {
+ .factors = &sun4i_pll5_data,
+ .ndivs = 4,
+ .div = {
+ { .shift = 0, .table = pll6_sata_tbl, .gate = 14 }, /* M, SATA */
+ { .fixed = 2 }, /* P, other */
+ { .self = 1 }, /* base factor clock, 2x */
+ { .fixed = 4 }, /* pll6 / 4, used as ahb input */
+ }
+};
+
+static const struct divs_data sun6i_a31_pll6_divs_data __initconst = {
+ .factors = &sun6i_a31_pll6_data,
+ .ndivs = 2,
+ .div = {
+ { .fixed = 2 }, /* normal output */
+ { .self = 1 }, /* base factor clock, 2x */
+ }
+};
+
+/*
+ * sunxi_divs_clk_setup() - Setup function for leaf divisors on clocks
+ *
+ * These clocks look something like this
+ * ________________________
+ * | ___divisor 1---|----> to consumer
+ * parent >--| pll___/___divisor 2---|----> to consumer
+ * | \_______________|____> to consumer
+ * |________________________|
+ */
+
+static struct clk ** __init sunxi_divs_clk_setup(struct device_node *node,
+ const struct divs_data *data)
+{
+ struct clk_onecell_data *clk_data;
+ const char *parent;
+ const char *clk_name;
+ struct clk **clks, *pclk;
+ struct clk_hw *gate_hw, *rate_hw;
+ const struct clk_ops *rate_ops;
+ struct clk_gate *gate = NULL;
+ struct clk_fixed_factor *fix_factor;
+ struct clk_divider *divider;
+ struct factors_data factors = *data->factors;
+ char *derived_name = NULL;
+ void __iomem *reg;
+ int ndivs = SUNXI_DIVS_MAX_QTY, i = 0;
+ int flags, clkflags;
+
+ /* if number of children known, use it */
+ if (data->ndivs)
+ ndivs = data->ndivs;
+
+ /* Try to find a name for base factor clock */
+ for (i = 0; i < ndivs; i++) {
+ if (data->div[i].self) {
+ of_property_read_string_index(node, "clock-output-names",
+ i, &factors.name);
+ break;
+ }
+ }
+ /* If we don't have a .self clk use the first output-name up to '_' */
+ if (factors.name == NULL) {
+ char *endp;
+
+ of_property_read_string_index(node, "clock-output-names",
+ 0, &clk_name);
+ endp = strchr(clk_name, '_');
+ if (endp) {
+ derived_name = kstrndup(clk_name, endp - clk_name,
+ GFP_KERNEL);
+ if (!derived_name)
+ return NULL;
+ factors.name = derived_name;
+ } else {
+ factors.name = clk_name;
+ }
+ }
+
+ /* Set up factor clock that we will be dividing */
+ pclk = sunxi_factors_clk_setup(node, &factors);
+ if (!pclk)
+ return NULL;
+
+ parent = __clk_get_name(pclk);
+ kfree(derived_name);
+
+ reg = of_iomap(node, 0);
+ if (!reg) {
+ pr_err("Could not map registers for divs-clk: %pOF\n", node);
+ return NULL;
+ }
+
+ clk_data = kmalloc(sizeof(struct clk_onecell_data), GFP_KERNEL);
+ if (!clk_data)
+ goto out_unmap;
+
+ clks = kcalloc(ndivs, sizeof(*clks), GFP_KERNEL);
+ if (!clks)
+ goto free_clkdata;
+
+ clk_data->clks = clks;
+
+ /* It's not a good idea to have automatic reparenting changing
+ * our RAM clock! */
+ clkflags = !strcmp("pll5", parent) ? 0 : CLK_SET_RATE_PARENT;
+
+ for (i = 0; i < ndivs; i++) {
+ if (of_property_read_string_index(node, "clock-output-names",
+ i, &clk_name) != 0)
+ break;
+
+ /* If this is the base factor clock, only update clks */
+ if (data->div[i].self) {
+ clk_data->clks[i] = pclk;
+ continue;
+ }
+
+ gate_hw = NULL;
+ rate_hw = NULL;
+ rate_ops = NULL;
+
+ /* If this leaf clock can be gated, create a gate */
+ if (data->div[i].gate) {
+ gate = kzalloc(sizeof(*gate), GFP_KERNEL);
+ if (!gate)
+ goto free_clks;
+
+ gate->reg = reg;
+ gate->bit_idx = data->div[i].gate;
+ gate->lock = &clk_lock;
+
+ gate_hw = &gate->hw;
+ }
+
+ /* Leaves can be fixed or configurable divisors */
+ if (data->div[i].fixed) {
+ fix_factor = kzalloc(sizeof(*fix_factor), GFP_KERNEL);
+ if (!fix_factor)
+ goto free_gate;
+
+ fix_factor->mult = 1;
+ fix_factor->div = data->div[i].fixed;
+
+ rate_hw = &fix_factor->hw;
+ rate_ops = &clk_fixed_factor_ops;
+ } else {
+ divider = kzalloc(sizeof(*divider), GFP_KERNEL);
+ if (!divider)
+ goto free_gate;
+
+ flags = data->div[i].pow ? CLK_DIVIDER_POWER_OF_TWO : 0;
+
+ divider->reg = reg;
+ divider->shift = data->div[i].shift;
+ divider->width = SUNXI_DIVISOR_WIDTH;
+ divider->flags = flags;
+ divider->lock = &clk_lock;
+ divider->table = data->div[i].table;
+
+ rate_hw = &divider->hw;
+ rate_ops = &clk_divider_ops;
+ }
+
+ /* Wrap the (potential) gate and the divisor on a composite
+ * clock to unify them */
+ clks[i] = clk_register_composite(NULL, clk_name, &parent, 1,
+ NULL, NULL,
+ rate_hw, rate_ops,
+ gate_hw, &clk_gate_ops,
+ clkflags |
+ (data->div[i].critical ?
+ CLK_IS_CRITICAL : 0));
+
+ WARN_ON(IS_ERR(clk_data->clks[i]));
+ }
+
+ /* Adjust to the real max */
+ clk_data->clk_num = i;
+
+ if (of_clk_add_provider(node, of_clk_src_onecell_get, clk_data)) {
+ pr_err("%s: failed to add clock provider for %s\n",
+ __func__, clk_name);
+ goto free_gate;
+ }
+
+ return clks;
+free_gate:
+ kfree(gate);
+free_clks:
+ kfree(clks);
+free_clkdata:
+ kfree(clk_data);
+out_unmap:
+ iounmap(reg);
+ return NULL;
+}
+
+static void __init sun4i_pll5_clk_setup(struct device_node *node)
+{
+ sunxi_divs_clk_setup(node, &pll5_divs_data);
+}
+CLK_OF_DECLARE(sun4i_pll5, "allwinner,sun4i-a10-pll5-clk",
+ sun4i_pll5_clk_setup);
+
+static void __init sun4i_pll6_clk_setup(struct device_node *node)
+{
+ sunxi_divs_clk_setup(node, &pll6_divs_data);
+}
+CLK_OF_DECLARE(sun4i_pll6, "allwinner,sun4i-a10-pll6-clk",
+ sun4i_pll6_clk_setup);
+
+static void __init sun6i_pll6_clk_setup(struct device_node *node)
+{
+ sunxi_divs_clk_setup(node, &sun6i_a31_pll6_divs_data);
+}
+CLK_OF_DECLARE(sun6i_pll6, "allwinner,sun6i-a31-pll6-clk",
+ sun6i_pll6_clk_setup);
+
+/*
+ * sun6i display
+ *
+ * rate = parent_rate / (m + 1);
+ */
+static void sun6i_display_factors(struct factors_request *req)
+{
+ u8 m;
+
+ if (req->rate > req->parent_rate)
+ req->rate = req->parent_rate;
+
+ m = DIV_ROUND_UP(req->parent_rate, req->rate);
+
+ req->rate = req->parent_rate / m;
+ req->m = m - 1;
+}
+
+static const struct clk_factors_config sun6i_display_config = {
+ .mshift = 0,
+ .mwidth = 4,
+};
+
+static const struct factors_data sun6i_display_data __initconst = {
+ .enable = 31,
+ .mux = 24,
+ .muxmask = BIT(2) | BIT(1) | BIT(0),
+ .table = &sun6i_display_config,
+ .getter = sun6i_display_factors,
+};
+
+static void __init sun6i_display_setup(struct device_node *node)
+{
+ sunxi_factors_clk_setup(node, &sun6i_display_data);
+}
+CLK_OF_DECLARE(sun6i_display, "allwinner,sun6i-a31-display-clk",
+ sun6i_display_setup);