@@ -1308,6 +1308,16 @@ config MFD_SC27XX_PMIC
This driver provides common support for accessing the SC27xx PMICs,
and it also adds the irq_chip parts for handling the PMIC chip events.
+config RZ_MTU3
+ bool "Renesas RZ/G2L MTU3a core driver"
+ depends on (ARCH_RZG2L && OF) || COMPILE_TEST
+ help
+ Select this option to enable Renesas RZ/G2L MTU3a core driver for
+ the Multi-Function Timer Pulse Unit 3 (MTU3a) hardware available
+ on SoCs from Renesas. The core driver shares the clk and channel
+ register access for the other child devices like Counter, PWM,
+ Clock Source, and Clock event.
+
config ABX500_CORE
bool "ST-Ericsson ABX500 Mixed Signal Circuit register functions"
depends on ARCH_U8500 || COMPILE_TEST
@@ -174,6 +174,7 @@ pcf50633-objs := pcf50633-core.o pcf50633-irq.o
obj-$(CONFIG_MFD_PCF50633) += pcf50633.o
obj-$(CONFIG_PCF50633_ADC) += pcf50633-adc.o
obj-$(CONFIG_PCF50633_GPIO) += pcf50633-gpio.o
+obj-$(CONFIG_RZ_MTU3) += rz-mtu3.o
obj-$(CONFIG_ABX500_CORE) += abx500-core.o
obj-$(CONFIG_MFD_DB8500_PRCMU) += db8500-prcmu.o
# ab8500-core need to come after db8500-prcmu (which provides the channel)
new file mode 100644
@@ -0,0 +1,391 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Renesas RZ/G2L Multi-Function Timer Pulse Unit 3(MTU3a) Core driver
+ *
+ * Copyright (C) 2023 Renesas Electronics Corporation
+ */
+
+#include <linux/bitfield.h>
+#include <linux/clk.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/rz-mtu3.h>
+#include <linux/of_platform.h>
+#include <linux/reset.h>
+#include <linux/spinlock.h>
+
+#include "rz-mtu3.h"
+
+struct rz_mtu3_priv {
+ void __iomem *mmio;
+ struct reset_control *rstc;
+ raw_spinlock_t lock;
+};
+
+/******* MTU3 registers (original offset is +0x1200) *******/
+static const unsigned long rz_mtu3_8bit_ch_reg_offs[][13] = {
+ [RZ_MTU3_CHAN_0] = MTU_8BIT_CH_0(0x104, 0x090, 0x100, 0x128, 0x101, 0x102, 0x103, 0x126),
+ [RZ_MTU3_CHAN_1] = MTU_8BIT_CH_1_2(0x184, 0x091, 0x185, 0x180, 0x194, 0x181, 0x182),
+ [RZ_MTU3_CHAN_2] = MTU_8BIT_CH_1_2(0x204, 0x092, 0x205, 0x200, 0x20c, 0x201, 0x202),
+ [RZ_MTU3_CHAN_3] = MTU_8BIT_CH_3_4_6_7(0x008, 0x093, 0x02c, 0x000, 0x04c, 0x002, 0x004, 0x005, 0x038),
+ [RZ_MTU3_CHAN_4] = MTU_8BIT_CH_3_4_6_7(0x009, 0x094, 0x02d, 0x001, 0x04d, 0x003, 0x006, 0x007, 0x039),
+ [RZ_MTU3_CHAN_5] = MTU_8BIT_CH_5(0xab2, 0x1eb, 0xab4, 0xab6, 0xa84, 0xa85, 0xa86, 0xa94, 0xa95, 0xa96, 0xaa4, 0xaa5, 0xaa6),
+ [RZ_MTU3_CHAN_6] = MTU_8BIT_CH_3_4_6_7(0x808, 0x893, 0x82c, 0x800, 0x84c, 0x802, 0x804, 0x805, 0x838),
+ [RZ_MTU3_CHAN_7] = MTU_8BIT_CH_3_4_6_7(0x809, 0x894, 0x82d, 0x801, 0x84d, 0x803, 0x806, 0x807, 0x839),
+ [RZ_MTU3_CHAN_8] = MTU_8BIT_CH_8(0x404, 0x098, 0x400, 0x406, 0x401, 0x402, 0x403)
+};
+
+static const unsigned long rz_mtu3_16bit_ch_reg_offs[][12] = {
+ [RZ_MTU3_CHAN_0] = MTU_16BIT_CH_0(0x106, 0x108, 0x10a, 0x10c, 0x10e, 0x120, 0x122),
+ [RZ_MTU3_CHAN_1] = MTU_16BIT_CH_1_2(0x186, 0x188, 0x18a),
+ [RZ_MTU3_CHAN_2] = MTU_16BIT_CH_1_2(0x206, 0x208, 0x20a),
+ [RZ_MTU3_CHAN_3] = MTU_16BIT_CH_3_6(0x010, 0x018, 0x01a, 0x024, 0x026, 0x072),
+ [RZ_MTU3_CHAN_4] = MTU_16BIT_CH_4_7(0x012, 0x01c, 0x01e, 0x028, 0x2a, 0x074, 0x076, 0x040, 0x044, 0x046, 0x048, 0x04a),
+ [RZ_MTU3_CHAN_5] = MTU_16BIT_CH_5(0xa80, 0xa82, 0xa90, 0xa92, 0xaa0, 0xaa2),
+ [RZ_MTU3_CHAN_6] = MTU_16BIT_CH_3_6(0x810, 0x818, 0x81a, 0x824, 0x826, 0x872),
+ [RZ_MTU3_CHAN_7] = MTU_16BIT_CH_4_7(0x812, 0x81c, 0x81e, 0x828, 0x82a, 0x874, 0x876, 0x840, 0x844, 0x846, 0x848, 0x84a)
+};
+
+static const unsigned long rz_mtu3_32bit_ch_reg_offs[][5] = {
+ [RZ_MTU3_CHAN_1] = MTU_32BIT_CH_1(0x1a0, 0x1a4, 0x1a8),
+ [RZ_MTU3_CHAN_8] = MTU_32BIT_CH_8(0x408, 0x40c, 0x410, 0x414, 0x418)
+};
+
+static bool rz_mtu3_is_16bit_shared_reg(u16 offset)
+{
+ return (offset == RZ_MTU3_TDDRA || offset == RZ_MTU3_TDDRB ||
+ offset == RZ_MTU3_TCDRA || offset == RZ_MTU3_TCDRB ||
+ offset == RZ_MTU3_TCBRA || offset == RZ_MTU3_TCBRB ||
+ offset == RZ_MTU3_TCNTSA || offset == RZ_MTU3_TCNTSB);
+}
+
+u16 rz_mtu3_shared_reg_read(struct rz_mtu3_channel *ch, u16 offset)
+{
+ struct rz_mtu3 *mtu = dev_get_drvdata(ch->dev->parent);
+ struct rz_mtu3_priv *priv = mtu->priv_data;
+
+ if (rz_mtu3_is_16bit_shared_reg(offset))
+ return readw(priv->mmio + offset);
+ else
+ return readb(priv->mmio + offset);
+}
+EXPORT_SYMBOL_GPL(rz_mtu3_shared_reg_read);
+
+u8 rz_mtu3_8bit_ch_read(struct rz_mtu3_channel *ch, u16 offset)
+{
+ struct rz_mtu3 *mtu = dev_get_drvdata(ch->dev->parent);
+ struct rz_mtu3_priv *priv = mtu->priv_data;
+ u16 ch_offs;
+
+ ch_offs = rz_mtu3_8bit_ch_reg_offs[ch->channel_number][offset];
+
+ return readb(priv->mmio + ch_offs);
+}
+EXPORT_SYMBOL_GPL(rz_mtu3_8bit_ch_read);
+
+u16 rz_mtu3_16bit_ch_read(struct rz_mtu3_channel *ch, u16 offset)
+{
+ struct rz_mtu3 *mtu = dev_get_drvdata(ch->dev->parent);
+ struct rz_mtu3_priv *priv = mtu->priv_data;
+ u16 ch_offs;
+
+ /* MTU8 doesn't have 16-bit registers */
+ if (ch->channel_number == RZ_MTU3_CHAN_8)
+ return 0;
+
+ ch_offs = rz_mtu3_16bit_ch_reg_offs[ch->channel_number][offset];
+
+ return readw(priv->mmio + ch_offs);
+}
+EXPORT_SYMBOL_GPL(rz_mtu3_16bit_ch_read);
+
+u32 rz_mtu3_32bit_ch_read(struct rz_mtu3_channel *ch, u16 offset)
+{
+ struct rz_mtu3 *mtu = dev_get_drvdata(ch->dev->parent);
+ struct rz_mtu3_priv *priv = mtu->priv_data;
+ u16 ch_offs;
+
+ if (ch->channel_number != RZ_MTU3_CHAN_1 && ch->channel_number != RZ_MTU3_CHAN_8)
+ return 0;
+
+ ch_offs = rz_mtu3_32bit_ch_reg_offs[ch->channel_number][offset];
+
+ return readl(priv->mmio + ch_offs);
+}
+EXPORT_SYMBOL_GPL(rz_mtu3_32bit_ch_read);
+
+void rz_mtu3_8bit_ch_write(struct rz_mtu3_channel *ch, u16 offset, u8 val)
+{
+ struct rz_mtu3 *mtu = dev_get_drvdata(ch->dev->parent);
+ struct rz_mtu3_priv *priv = mtu->priv_data;
+ u16 ch_offs;
+
+ ch_offs = rz_mtu3_8bit_ch_reg_offs[ch->channel_number][offset];
+ writeb(val, priv->mmio + ch_offs);
+}
+EXPORT_SYMBOL_GPL(rz_mtu3_8bit_ch_write);
+
+void rz_mtu3_16bit_ch_write(struct rz_mtu3_channel *ch, u16 offset, u16 val)
+{
+ struct rz_mtu3 *mtu = dev_get_drvdata(ch->dev->parent);
+ struct rz_mtu3_priv *priv = mtu->priv_data;
+ u16 ch_offs;
+
+ /* MTU8 doesn't have 16-bit registers */
+ if (ch->channel_number == RZ_MTU3_CHAN_8)
+ return;
+
+ ch_offs = rz_mtu3_16bit_ch_reg_offs[ch->channel_number][offset];
+ writew(val, priv->mmio + ch_offs);
+}
+EXPORT_SYMBOL_GPL(rz_mtu3_16bit_ch_write);
+
+void rz_mtu3_32bit_ch_write(struct rz_mtu3_channel *ch, u16 offset, u32 val)
+{
+ struct rz_mtu3 *mtu = dev_get_drvdata(ch->dev->parent);
+ struct rz_mtu3_priv *priv = mtu->priv_data;
+ u16 ch_offs;
+
+ if (ch->channel_number != RZ_MTU3_CHAN_1 && ch->channel_number != RZ_MTU3_CHAN_8)
+ return;
+
+ ch_offs = rz_mtu3_32bit_ch_reg_offs[ch->channel_number][offset];
+ writel(val, priv->mmio + ch_offs);
+}
+EXPORT_SYMBOL_GPL(rz_mtu3_32bit_ch_write);
+
+void rz_mtu3_shared_reg_write(struct rz_mtu3_channel *ch, u16 offset, u16 value)
+{
+ struct rz_mtu3 *mtu = dev_get_drvdata(ch->dev->parent);
+ struct rz_mtu3_priv *priv = mtu->priv_data;
+
+ if (rz_mtu3_is_16bit_shared_reg(offset))
+ writew(value, priv->mmio + offset);
+ else
+ writeb((u8)value, priv->mmio + offset);
+}
+EXPORT_SYMBOL_GPL(rz_mtu3_shared_reg_write);
+
+void rz_mtu3_shared_reg_update_bit(struct rz_mtu3_channel *ch, u16 offset,
+ u16 pos, u8 val)
+{
+ struct rz_mtu3 *mtu = dev_get_drvdata(ch->dev->parent);
+ struct rz_mtu3_priv *priv = mtu->priv_data;
+ unsigned long tmdr, flags;
+
+ raw_spin_lock_irqsave(&priv->lock, flags);
+ tmdr = rz_mtu3_shared_reg_read(ch, offset);
+ __assign_bit(pos, &tmdr, !!val);
+ rz_mtu3_shared_reg_write(ch, offset, tmdr);
+ raw_spin_unlock_irqrestore(&priv->lock, flags);
+}
+EXPORT_SYMBOL_GPL(rz_mtu3_shared_reg_update_bit);
+
+static u16 rz_mtu3_get_tstr_offset(struct rz_mtu3_channel *ch)
+{
+ u16 offset;
+
+ switch (ch->channel_number) {
+ case RZ_MTU3_CHAN_0:
+ case RZ_MTU3_CHAN_1:
+ case RZ_MTU3_CHAN_2:
+ case RZ_MTU3_CHAN_3:
+ case RZ_MTU3_CHAN_4:
+ case RZ_MTU3_CHAN_8:
+ offset = RZ_MTU3_TSTRA;
+ break;
+ case RZ_MTU3_CHAN_5:
+ offset = RZ_MTU3_TSTR;
+ break;
+ case RZ_MTU3_CHAN_6:
+ case RZ_MTU3_CHAN_7:
+ offset = RZ_MTU3_TSTRB;
+ break;
+ default:
+ offset = 0;
+ break;
+ }
+
+ return offset;
+}
+
+static u8 rz_mtu3_get_tstr_bit_pos(struct rz_mtu3_channel *ch)
+{
+ u8 bitpos;
+
+ switch (ch->channel_number) {
+ case RZ_MTU3_CHAN_0:
+ case RZ_MTU3_CHAN_1:
+ case RZ_MTU3_CHAN_2:
+ case RZ_MTU3_CHAN_6:
+ case RZ_MTU3_CHAN_7:
+ bitpos = ch->channel_number;
+ break;
+ case RZ_MTU3_CHAN_3:
+ bitpos = 6;
+ break;
+ case RZ_MTU3_CHAN_4:
+ bitpos = 7;
+ break;
+ case RZ_MTU3_CHAN_5:
+ bitpos = 2;
+ break;
+ case RZ_MTU3_CHAN_8:
+ bitpos = 3;
+ break;
+ default:
+ bitpos = 0;
+ break;
+ }
+
+ return bitpos;
+}
+
+static void rz_mtu3_start_stop_ch(struct rz_mtu3_channel *ch, bool start)
+{
+ struct rz_mtu3 *mtu = dev_get_drvdata(ch->dev->parent);
+ struct rz_mtu3_priv *priv = mtu->priv_data;
+ unsigned long flags, tstr;
+ u16 offset;
+ u8 bitpos;
+
+ /* start stop register shared by multiple timer channels */
+ raw_spin_lock_irqsave(&priv->lock, flags);
+
+ offset = rz_mtu3_get_tstr_offset(ch);
+ bitpos = rz_mtu3_get_tstr_bit_pos(ch);
+ tstr = rz_mtu3_shared_reg_read(ch, offset);
+ __assign_bit(bitpos, &tstr, start);
+ rz_mtu3_shared_reg_write(ch, offset, tstr);
+
+ raw_spin_unlock_irqrestore(&priv->lock, flags);
+}
+
+bool rz_mtu3_is_enabled(struct rz_mtu3_channel *ch)
+{
+ struct rz_mtu3 *mtu = dev_get_drvdata(ch->dev->parent);
+ struct rz_mtu3_priv *priv = mtu->priv_data;
+ unsigned long flags, tstr;
+ bool ret = false;
+ u16 offset;
+ u8 bitpos;
+
+ /* start stop register shared by multiple timer channels */
+ raw_spin_lock_irqsave(&priv->lock, flags);
+
+ offset = rz_mtu3_get_tstr_offset(ch);
+ bitpos = rz_mtu3_get_tstr_bit_pos(ch);
+ tstr = rz_mtu3_shared_reg_read(ch, offset);
+ ret = tstr & BIT(bitpos);
+
+ raw_spin_unlock_irqrestore(&priv->lock, flags);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(rz_mtu3_is_enabled);
+
+int rz_mtu3_enable(struct rz_mtu3_channel *ch)
+{
+ /* enable channel */
+ rz_mtu3_start_stop_ch(ch, true);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(rz_mtu3_enable);
+
+void rz_mtu3_disable(struct rz_mtu3_channel *ch)
+{
+ /* disable channel */
+ rz_mtu3_start_stop_ch(ch, false);
+}
+EXPORT_SYMBOL_GPL(rz_mtu3_disable);
+
+static void rz_mtu3_reset_assert(void *data)
+{
+ struct rz_mtu3 *mtu = dev_get_drvdata(data);
+ struct rz_mtu3_priv *priv = mtu->priv_data;
+
+ mfd_remove_devices(data);
+ reset_control_assert(priv->rstc);
+}
+
+static const struct mfd_cell rz_mtu3_devs[] = {
+ {
+ .name = "rz-mtu3-counter",
+ },
+ {
+ .name = "pwm-rz-mtu3",
+ },
+};
+
+static int rz_mtu3_probe(struct platform_device *pdev)
+{
+ struct rz_mtu3_priv *priv;
+ struct rz_mtu3 *ddata;
+ unsigned int i;
+ int ret;
+
+ ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL);
+ if (!ddata)
+ return -ENOMEM;
+
+ ddata->priv_data = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
+ if (!ddata->priv_data)
+ return -ENOMEM;
+
+ priv = ddata->priv_data;
+
+ priv->mmio = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(priv->mmio))
+ return PTR_ERR(priv->mmio);
+
+ priv->rstc = devm_reset_control_get_exclusive(&pdev->dev, NULL);
+ if (IS_ERR(priv->rstc))
+ return PTR_ERR(priv->rstc);
+
+ ddata->clk = devm_clk_get(&pdev->dev, NULL);
+ if (IS_ERR(ddata->clk))
+ return PTR_ERR(ddata->clk);
+
+ reset_control_deassert(priv->rstc);
+ raw_spin_lock_init(&priv->lock);
+ platform_set_drvdata(pdev, ddata);
+
+ for (i = 0; i < RZ_MTU_NUM_CHANNELS; i++) {
+ ddata->channels[i].channel_number = i;
+ ddata->channels[i].is_busy = false;
+ mutex_init(&ddata->channels[i].lock);
+ }
+
+ ret = mfd_add_devices(&pdev->dev, 0, rz_mtu3_devs,
+ ARRAY_SIZE(rz_mtu3_devs), NULL, 0, NULL);
+ if (ret < 0)
+ goto err_assert;
+
+ return devm_add_action_or_reset(&pdev->dev, rz_mtu3_reset_assert,
+ &pdev->dev);
+
+err_assert:
+ reset_control_assert(priv->rstc);
+ return ret;
+}
+
+static const struct of_device_id rz_mtu3_of_match[] = {
+ { .compatible = "renesas,rz-mtu3", },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, rz_mtu3_of_match);
+
+static struct platform_driver rz_mtu3_driver = {
+ .probe = rz_mtu3_probe,
+ .driver = {
+ .name = "rz-mtu3",
+ .of_match_table = rz_mtu3_of_match,
+ },
+};
+module_platform_driver(rz_mtu3_driver);
+
+MODULE_AUTHOR("Biju Das <biju.das.jz@bp.renesas.com>");
+MODULE_DESCRIPTION("Renesas RZ/G2L MTU3a Core Driver");
+MODULE_LICENSE("GPL");
new file mode 100644
@@ -0,0 +1,147 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * MFD internals for Renesas RZ/G2L MTU3 Core driver
+ *
+ * Copyright (C) 2023 Renesas Electronics Corporation
+ */
+
+#ifndef RZ_MTU3_MFD_H
+#define RZ_MTU3_MFD_H
+
+#define MTU_8BIT_CH_0(_tier, _nfcr, _tcr, _tcr2, _tmdr1, _tiorh, _tiorl, _tbtm) \
+ { \
+ [RZ_MTU3_TIER] = _tier, \
+ [RZ_MTU3_NFCR] = _nfcr, \
+ [RZ_MTU3_TCR] = _tcr, \
+ [RZ_MTU3_TCR2] = _tcr2, \
+ [RZ_MTU3_TMDR1] = _tmdr1, \
+ [RZ_MTU3_TIORH] = _tiorh, \
+ [RZ_MTU3_TIORL] = _tiorl, \
+ [RZ_MTU3_TBTM] = _tbtm \
+ }
+
+#define MTU_8BIT_CH_1_2(_tier, _nfcr, _tsr, _tcr, _tcr2, _tmdr1, _tior) \
+ { \
+ [RZ_MTU3_TIER] = _tier, \
+ [RZ_MTU3_NFCR] = _nfcr, \
+ [RZ_MTU3_TSR] = _tsr, \
+ [RZ_MTU3_TCR] = _tcr, \
+ [RZ_MTU3_TCR2] = _tcr2, \
+ [RZ_MTU3_TMDR1] = _tmdr1, \
+ [RZ_MTU3_TIOR] = _tior \
+ } \
+
+#define MTU_8BIT_CH_3_4_6_7(_tier, _nfcr, _tsr, _tcr, _tcr2, _tmdr1, _tiorh, _tiorl, _tbtm) \
+ { \
+ [RZ_MTU3_TIER] = _tier, \
+ [RZ_MTU3_NFCR] = _nfcr, \
+ [RZ_MTU3_TSR] = _tsr, \
+ [RZ_MTU3_TCR] = _tcr, \
+ [RZ_MTU3_TCR2] = _tcr2, \
+ [RZ_MTU3_TMDR1] = _tmdr1, \
+ [RZ_MTU3_TIORH] = _tiorh, \
+ [RZ_MTU3_TIORL] = _tiorl, \
+ [RZ_MTU3_TBTM] = _tbtm \
+ } \
+
+#define MTU_8BIT_CH_5(_tier, _nfcr, _tstr, _tcntcmpclr, _tcru, _tcr2u, _tioru, \
+ _tcrv, _tcr2v, _tiorv, _tcrw, _tcr2w, _tiorw) \
+ { \
+ [RZ_MTU3_TIER] = _tier, \
+ [RZ_MTU3_NFCR] = _nfcr, \
+ [RZ_MTU3_TSTR] = _tstr, \
+ [RZ_MTU3_TCNTCMPCLR] = _tcntcmpclr, \
+ [RZ_MTU3_TCRU] = _tcru, \
+ [RZ_MTU3_TCR2U] = _tcr2u, \
+ [RZ_MTU3_TIORU] = _tioru, \
+ [RZ_MTU3_TCRV] = _tcrv, \
+ [RZ_MTU3_TCR2V] = _tcr2v, \
+ [RZ_MTU3_TIORV] = _tiorv, \
+ [RZ_MTU3_TCRW] = _tcrw, \
+ [RZ_MTU3_TCR2W] = _tcr2w, \
+ [RZ_MTU3_TIORW] = _tiorw \
+ } \
+
+#define MTU_8BIT_CH_8(_tier, _nfcr, _tcr, _tcr2, _tmdr1, _tiorh, _tiorl) \
+ { \
+ [RZ_MTU3_TIER] = _tier, \
+ [RZ_MTU3_NFCR] = _nfcr, \
+ [RZ_MTU3_TCR] = _tcr, \
+ [RZ_MTU3_TCR2] = _tcr2, \
+ [RZ_MTU3_TMDR1] = _tmdr1, \
+ [RZ_MTU3_TIORH] = _tiorh, \
+ [RZ_MTU3_TIORL] = _tiorl \
+ } \
+
+#define MTU_16BIT_CH_0(_tcnt, _tgra, _tgrb, _tgrc, _tgrd, _tgre, _tgrf) \
+ { \
+ [RZ_MTU3_TCNT] = _tcnt, \
+ [RZ_MTU3_TGRA] = _tgra, \
+ [RZ_MTU3_TGRB] = _tgrb, \
+ [RZ_MTU3_TGRC] = _tgrc, \
+ [RZ_MTU3_TGRD] = _tgrd, \
+ [RZ_MTU3_TGRE] = _tgre, \
+ [RZ_MTU3_TGRF] = _tgrf \
+ }
+
+#define MTU_16BIT_CH_1_2(_tcnt, _tgra, _tgrb) \
+ { \
+ [RZ_MTU3_TCNT] = _tcnt, \
+ [RZ_MTU3_TGRA] = _tgra, \
+ [RZ_MTU3_TGRB] = _tgrb \
+ }
+
+#define MTU_16BIT_CH_3_6(_tcnt, _tgra, _tgrb, _tgrc, _tgrd, _tgre) \
+ { \
+ [RZ_MTU3_TCNT] = _tcnt, \
+ [RZ_MTU3_TGRA] = _tgra, \
+ [RZ_MTU3_TGRB] = _tgrb, \
+ [RZ_MTU3_TGRC] = _tgrc, \
+ [RZ_MTU3_TGRD] = _tgrd, \
+ [RZ_MTU3_TGRE] = _tgre \
+ }
+
+#define MTU_16BIT_CH_4_7(_tcnt, _tgra, _tgrb, _tgrc, _tgrd, _tgre, _tgrf, \
+ _tadcr, _tadcora, _tadcorb, _tadcobra, _tadcobrb) \
+ { \
+ [RZ_MTU3_TCNT] = _tcnt, \
+ [RZ_MTU3_TGRA] = _tgra, \
+ [RZ_MTU3_TGRB] = _tgrb, \
+ [RZ_MTU3_TGRC] = _tgrc, \
+ [RZ_MTU3_TGRD] = _tgrd, \
+ [RZ_MTU3_TGRE] = _tgre, \
+ [RZ_MTU3_TGRF] = _tgrf, \
+ [RZ_MTU3_TADCR] = _tadcr, \
+ [RZ_MTU3_TADCORA] = _tadcora, \
+ [RZ_MTU3_TADCORB] = _tadcorb, \
+ [RZ_MTU3_TADCOBRA] = _tadcobra, \
+ [RZ_MTU3_TADCOBRB] = _tadcobrb \
+ }
+
+#define MTU_16BIT_CH_5(_tcntu, _tgru, _tcntv, _tgrv, _tcntw, _tgrw) \
+ { \
+ [RZ_MTU3_TCNTU] = _tcntu, \
+ [RZ_MTU3_TGRU] = _tgru, \
+ [RZ_MTU3_TCNTV] = _tcntv, \
+ [RZ_MTU3_TGRV] = _tgrv, \
+ [RZ_MTU3_TCNTW] = _tcntw, \
+ [RZ_MTU3_TGRW] = _tgrw \
+ }
+
+#define MTU_32BIT_CH_1(_tcntlw, _tgralw, _tgrblw) \
+ { \
+ [RZ_MTU3_TCNTLW] = _tcntlw, \
+ [RZ_MTU3_TGRALW] = _tgralw, \
+ [RZ_MTU3_TGRBLW] = _tgrblw \
+ }
+
+#define MTU_32BIT_CH_8(_tcnt, _tgra, _tgrb, _tgrc, _tgrd) \
+ { \
+ [RZ_MTU3_TCNT] = _tcnt, \
+ [RZ_MTU3_TGRA] = _tgra, \
+ [RZ_MTU3_TGRB] = _tgrb, \
+ [RZ_MTU3_TGRC] = _tgrc, \
+ [RZ_MTU3_TGRD] = _tgrd \
+ }
+
+#endif
new file mode 100644
@@ -0,0 +1,241 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2022 Renesas Electronics Corporation
+ */
+#ifndef __MFD_RZ_MTU3_H__
+#define __MFD_RZ_MTU3_H__
+
+#include <linux/clk.h>
+#include <linux/device.h>
+#include <linux/mutex.h>
+
+/* 8-bit shared register offsets macros */
+#define RZ_MTU3_TSTRA 0x080 /* Timer start register A */
+#define RZ_MTU3_TSTRB 0x880 /* Timer start register B */
+
+/* 16-bit shared register offset macros */
+#define RZ_MTU3_TDDRA 0x016 /* Timer dead time data register A */
+#define RZ_MTU3_TDDRB 0x816 /* Timer dead time data register B */
+#define RZ_MTU3_TCDRA 0x014 /* Timer cycle data register A */
+#define RZ_MTU3_TCDRB 0x814 /* Timer cycle data register B */
+#define RZ_MTU3_TCBRA 0x022 /* Timer cycle buffer register A */
+#define RZ_MTU3_TCBRB 0x822 /* Timer cycle buffer register B */
+#define RZ_MTU3_TCNTSA 0x020 /* Timer subcounter A */
+#define RZ_MTU3_TCNTSB 0x820 /* Timer subcounter B */
+
+/*
+ * MTU5 contains 3 timer counter registers and is totaly different
+ * from other channels, so we must separate its offset
+ */
+
+/* 8-bit register offset macros of MTU3 channels except MTU5 */
+#define RZ_MTU3_TIER 0 /* Timer interrupt register */
+#define RZ_MTU3_NFCR 1 /* Noise filter control register */
+#define RZ_MTU3_TSR 2 /* Timer status register */
+#define RZ_MTU3_TCR 3 /* Timer control register */
+#define RZ_MTU3_TCR2 4 /* Timer control register 2 */
+
+/* Timer mode register 1 */
+#define RZ_MTU3_TMDR1 5
+#define RZ_MTU3_TMDR1_MD GENMASK(3, 0)
+#define RZ_MTU3_TMDR1_MD_NORMAL FIELD_PREP(RZ_MTU3_TMDR1_MD, 0)
+#define RZ_MTU3_TMDR1_MD_PWMMODE1 FIELD_PREP(RZ_MTU3_TMDR1_MD, 2)
+
+#define RZ_MTU3_TIOR 6 /* Timer I/O control register */
+#define RZ_MTU3_TIORH 6 /* Timer I/O control register H */
+#define RZ_MTU3_TIORL 7 /* Timer I/O control register L */
+/* Only MTU3/4/6/7 have TBTM registers */
+#define RZ_MTU3_TBTM 8 /* Timer buffer operation transfer mode register */
+
+/* 8-bit MTU5 register offset macros */
+#define RZ_MTU3_TSTR 2 /* MTU5 Timer start register */
+#define RZ_MTU3_TCNTCMPCLR 3 /* MTU5 Timer compare match clear register */
+#define RZ_MTU3_TCRU 4 /* Timer control register U */
+#define RZ_MTU3_TCR2U 5 /* Timer control register 2U */
+#define RZ_MTU3_TIORU 6 /* Timer I/O control register U */
+#define RZ_MTU3_TCRV 7 /* Timer control register V */
+#define RZ_MTU3_TCR2V 8 /* Timer control register 2V */
+#define RZ_MTU3_TIORV 9 /* Timer I/O control register V */
+#define RZ_MTU3_TCRW 10 /* Timer control register W */
+#define RZ_MTU3_TCR2W 11 /* Timer control register 2W */
+#define RZ_MTU3_TIORW 12 /* Timer I/O control register W */
+
+/* 16-bit register offset macros of MTU3 channels except MTU5 */
+#define RZ_MTU3_TCNT 0 /* Timer counter */
+#define RZ_MTU3_TGRA 1 /* Timer general register A */
+#define RZ_MTU3_TGRB 2 /* Timer general register B */
+#define RZ_MTU3_TGRC 3 /* Timer general register C */
+#define RZ_MTU3_TGRD 4 /* Timer general register D */
+#define RZ_MTU3_TGRE 5 /* Timer general register E */
+#define RZ_MTU3_TGRF 6 /* Timer general register F */
+/* Timer A/D converter start request registers */
+#define RZ_MTU3_TADCR 7 /* control register */
+#define RZ_MTU3_TADCORA 8 /* cycle set register A */
+#define RZ_MTU3_TADCORB 9 /* cycle set register B */
+#define RZ_MTU3_TADCOBRA 10 /* cycle set buffer register A */
+#define RZ_MTU3_TADCOBRB 11 /* cycle set buffer register B */
+
+/* 16-bit MTU5 register offset macros */
+#define RZ_MTU3_TCNTU 0 /* MTU5 Timer counter U */
+#define RZ_MTU3_TGRU 1 /* MTU5 Timer general register U */
+#define RZ_MTU3_TCNTV 2 /* MTU5 Timer counter V */
+#define RZ_MTU3_TGRV 3 /* MTU5 Timer general register V */
+#define RZ_MTU3_TCNTW 4 /* MTU5 Timer counter W */
+#define RZ_MTU3_TGRW 5 /* MTU5 Timer general register W */
+
+/* 32-bit register offset */
+#define RZ_MTU3_TCNTLW 0 /* Timer longword counter */
+#define RZ_MTU3_TGRALW 1 /* Timer longword general register A */
+#define RZ_MTU3_TGRBLW 2 /* Timer longowrd general register B */
+
+#define RZ_MTU3_TMDR3 0x191 /* MTU1 Timer Mode Register 3 */
+
+/* Macros for setting registers */
+#define RZ_MTU3_TCR_CCLR_TGRA BIT(5)
+
+enum rz_mtu3_channels {
+ RZ_MTU3_CHAN_0,
+ RZ_MTU3_CHAN_1,
+ RZ_MTU3_CHAN_2,
+ RZ_MTU3_CHAN_3,
+ RZ_MTU3_CHAN_4,
+ RZ_MTU3_CHAN_5,
+ RZ_MTU3_CHAN_6,
+ RZ_MTU3_CHAN_7,
+ RZ_MTU3_CHAN_8,
+ RZ_MTU_NUM_CHANNELS
+};
+
+/**
+ * struct rz_mtu3_channel - MTU3 channel private data
+ *
+ * @dev: device handle
+ * @channel_number: channel number
+ * @lock: Lock to protect channel state
+ * @is_busy: channel state
+ */
+struct rz_mtu3_channel {
+ struct device *dev;
+ unsigned int channel_number;
+ struct mutex lock;
+ bool is_busy;
+};
+
+/**
+ * struct rz_mtu3 - MTU3 core private data
+ *
+ * @clk: MTU3 module clock
+ * @rz_mtu3_channel: HW channels
+ * @priv_data: MTU3 core driver private data
+ */
+struct rz_mtu3 {
+ struct clk *clk;
+ struct rz_mtu3_channel channels[RZ_MTU_NUM_CHANNELS];
+
+ void *priv_data;
+};
+
+#if IS_ENABLED(CONFIG_RZ_MTU3)
+static inline bool rz_mtu3_request_channel(struct rz_mtu3_channel *ch)
+{
+ mutex_lock(&ch->lock);
+ if (ch->is_busy) {
+ mutex_unlock(&ch->lock);
+ return false;
+ }
+
+ ch->is_busy = true;
+ mutex_unlock(&ch->lock);
+
+ return true;
+}
+
+static inline void rz_mtu3_release_channel(struct rz_mtu3_channel *ch)
+{
+ mutex_lock(&ch->lock);
+ ch->is_busy = false;
+ mutex_unlock(&ch->lock);
+}
+
+bool rz_mtu3_is_enabled(struct rz_mtu3_channel *ch);
+void rz_mtu3_disable(struct rz_mtu3_channel *ch);
+int rz_mtu3_enable(struct rz_mtu3_channel *ch);
+
+u8 rz_mtu3_8bit_ch_read(struct rz_mtu3_channel *ch, u16 off);
+u16 rz_mtu3_16bit_ch_read(struct rz_mtu3_channel *ch, u16 off);
+u32 rz_mtu3_32bit_ch_read(struct rz_mtu3_channel *ch, u16 off);
+u16 rz_mtu3_shared_reg_read(struct rz_mtu3_channel *ch, u16 off);
+
+void rz_mtu3_8bit_ch_write(struct rz_mtu3_channel *ch, u16 off, u8 val);
+void rz_mtu3_16bit_ch_write(struct rz_mtu3_channel *ch, u16 off, u16 val);
+void rz_mtu3_32bit_ch_write(struct rz_mtu3_channel *ch, u16 off, u32 val);
+void rz_mtu3_shared_reg_write(struct rz_mtu3_channel *ch, u16 off, u16 val);
+void rz_mtu3_shared_reg_update_bit(struct rz_mtu3_channel *ch, u16 off,
+ u16 pos, u8 val);
+#else
+static inline bool rz_mtu3_request_channel(struct rz_mtu3_channel *ch)
+{
+ return false;
+}
+
+static inline void rz_mtu3_release_channel(struct rz_mtu3_channel *ch)
+{
+}
+
+static inline bool rz_mtu3_is_enabled(struct rz_mtu3_channel *ch)
+{
+ return false;
+}
+
+static inline void rz_mtu3_disable(struct rz_mtu3_channel *ch)
+{
+}
+
+static inline int rz_mtu3_enable(struct rz_mtu3_channel *ch)
+{
+ return 0;
+}
+
+static inline u8 rz_mtu3_8bit_ch_read(struct rz_mtu3_channel *ch, u16 off)
+{
+ return 0;
+}
+
+static inline u16 rz_mtu3_16bit_ch_read(struct rz_mtu3_channel *ch, u16 off)
+{
+ return 0;
+}
+
+static inline u32 rz_mtu3_32bit_ch_read(struct rz_mtu3_channel *ch, u16 off)
+{
+ return 0;
+}
+
+static inline u16 rz_mtu3_shared_reg_read(struct rz_mtu3_channel *ch, u16 off)
+{
+ return 0;
+}
+
+static inline void rz_mtu3_8bit_ch_write(struct rz_mtu3_channel *ch, u16 off, u8 val)
+{
+}
+
+static inline void rz_mtu3_16bit_ch_write(struct rz_mtu3_channel *ch, u16 off, u16 val)
+{
+}
+
+static inline void rz_mtu3_32bit_ch_write(struct rz_mtu3_channel *ch, u16 off, u32 val)
+{
+}
+
+static inline void rz_mtu3_shared_reg_write(struct rz_mtu3_channel *ch, u16 off, u16 val)
+{
+}
+
+static inline void rz_mtu3_shared_reg_update_bit(struct rz_mtu3_channel *ch,
+ u16 off, u16 pos, u8 val)
+{
+}
+#endif
+
+#endif /* __MFD_RZ_MTU3_H__ */
The RZ/G2L multi-function timer pulse unit 3 (MTU3a) is embedded in the Renesas RZ/G2L family SoCs. It consists of eight 16-bit timer channels and one 32-bit timer channel. It supports the following functions - Counter - Timer - PWM The 8/16/32 bit registers are mixed in each channel. Add MTU3a core driver for RZ/G2L SoC. The core driver shares the clk and channel register access for the other child devices like Counter, PWM and Clock event. Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com> --- Ref: https://patchwork.kernel.org/project/linux-renesas-soc/patch/20230113161753.1073706-3-biju.das.jz@bp.renesas.com/ v13->v14: * Added helper macros for initializing 8/16/32 channel reg offset table in "drivers/mfd/rz-mtu3.h" * Replaced "off"->offset in read_write() * Replaced __LINUX_RZ_MTU3_H__->__MFD_RZ_MTU3_H__ * Added header file device.h and mutex.h * Updated rz_mtu3_request_channel() * Replaced channel_index->channel_number in struct rz_mtu3_channel * Dropped redundant comments. * Renamed channel number macros from RZ_MTU*->RZ_MTU3_CHAN_* * Added core driver specific private data in struct rz_mtu3 and updated the comments. This replaces mmio from struct rz_mtu3. * Started using actual offset in channel reg table and removed ch_reg_offsets table Also simplified the code 8/16/32 bits read_write() and removed base from struct rz_mtu3_channel. * Simplified rz_mtu3_start_stop_ch()/rz_mtu3_is_enabled() by adding helper functions rz_mtu3_get_tstr_offset()/rz_mtu3_get_tstr_bit_pos(). v12->v13: * Moved RZ_MTU3_TMDR1_* macros from pwm driver to rz-mtu3.h. v11->v2: * Moved the core driver from timer to MFD. * Moved header fine from clocksource/rz-mtu3.h->linux/mfd/rz-mtu3.h * Removed Select MFD_CORE option from config. v10->v11: * No change. v9->v10: * No change. v8->v9: * No change. v7->v8: * Add locking for RMW on rz_mtu3_shared_reg_update_bit() * Replaced enum rz_mtu3_functions with channel busy flag * Added API for request and release a channel. v6->v7: * Added channel specific mutex to avoid races between child devices (for eg: pwm and counter) * Added rz_mtu3_shared_reg_update_bit() to update bit. v5->v6: * Updated commit and KConfig description * Selected MFD_CORE to avoid build error if CONFIG_MFD_CORE not set. * Improved error handling in probe(). * Updated MODULE_DESCRIPTION and title. v4->v5: * Moved core driver from MFD to timer * Child devices instatiated using mfd_add_devices() v3->v4: * A single driver that registers both the counter and the pwm functionalities that binds against "renesas,rz-mtu3". * Moved PM handling from child devices to here. * replaced include/linux/mfd/rz-mtu3.h->drivers/mfd/rz-mtu3.h * Removed "remove" callback v2->v3: * removed unwanted header files * Added LUT for 32 bit registers as it needed for 32-bit cascade counting. * Exported 32 bit read/write functions. v1->v2: * Changed the compatible name * Replaced devm_reset_control_get->devm_reset_control_get_exclusive * Renamed function names rzg2l_mtu3->rz_mtu3 as this is generic IP in RZ family SoC's. --- drivers/mfd/Kconfig | 10 + drivers/mfd/Makefile | 1 + drivers/mfd/rz-mtu3.c | 391 ++++++++++++++++++++++++++++++++++++ drivers/mfd/rz-mtu3.h | 147 ++++++++++++++ include/linux/mfd/rz-mtu3.h | 241 ++++++++++++++++++++++ 5 files changed, 790 insertions(+) create mode 100644 drivers/mfd/rz-mtu3.c create mode 100644 drivers/mfd/rz-mtu3.h create mode 100644 include/linux/mfd/rz-mtu3.h