Add RZ/G2L MTU3 MFD driver. This driver exposes the following functions
1) 8/16/32 register access
2) handles runtime PM.
3) channel enable/disable for client modules.
Signed-off-by: Biju Das <biju.das.jz@xxxxxxxxxxxxxx>
---
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 | 12 +
drivers/mfd/Makefile | 2 +
drivers/mfd/rz-mtu3-core.c | 476 +++++++++++++++++++++++++++++++++++++
drivers/mfd/rz-mtu3.h | 221 +++++++++++++++++
4 files changed, 711 insertions(+)
create mode 100644 drivers/mfd/rz-mtu3-core.c
create mode 100644 drivers/mfd/rz-mtu3.h
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index abb58ab1a1a4..7329971a3bdf 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -1974,6 +1974,18 @@ config MFD_ROHM_BD957XMUF
BD9573MUF Power Management ICs. BD9576 and BD9573 are primarily
designed to be used to power R-Car series processors.
+config MFD_RZ_MTU3
+ tristate "Support for RZ/G2L Multi-Function Timer Pulse Unit 3 MTU3a"
+ depends on (ARCH_RZG2L && OF) || COMPILE_TEST
+ select MFD_CORE
+ help
+ Select this option to enable RZ/G2L MTU3 timers driver used
+ for PWM, Clock Source, Clock event and Counter. This driver allow to
+ share the registers between the others drivers.
+
+ To compile this driver as a module, choose M here: the
+ module will be called rz-mtu3.
+
config MFD_STM32_LPTIMER
tristate "Support for STM32 Low-Power Timer"
depends on (ARCH_STM32 && OF) || COMPILE_TEST
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index 858cacf659d6..cd492903411c 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -251,6 +251,8 @@ obj-$(CONFIG_MFD_ALTERA_SYSMGR) += altera-sysmgr.o
obj-$(CONFIG_MFD_STPMIC1) += stpmic1.o
obj-$(CONFIG_MFD_SUN4I_GPADC) += sun4i-gpadc.o
+rz-mtu3-objs := rz-mtu3-core.o
+obj-$(CONFIG_MFD_RZ_MTU3) += rz-mtu3.o
obj-$(CONFIG_MFD_STM32_LPTIMER) += stm32-lptimer.o
obj-$(CONFIG_MFD_STM32_TIMERS) += stm32-timers.o
obj-$(CONFIG_MFD_MXS_LRADC) += mxs-lradc.o
diff --git a/drivers/mfd/rz-mtu3-core.c b/drivers/mfd/rz-mtu3-core.c
new file mode 100644
index 000000000000..a9386765f51c
--- /dev/null
+++ b/drivers/mfd/rz-mtu3-core.c
@@ -0,0 +1,476 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Renesas RZ/G2L Multi-Function Timer Pulse Unit 3 - MTU3a
+ *
+ * Copyright (C) 2022 Renesas Electronics Corporation
+ */
+
+#include <linux/bitfield.h>
+#include <linux/clk.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/of_platform.h>
+#include <linux/pm_runtime.h>
+#include <linux/reset.h>
+
+#include "rz-mtu3.h"
+
+static const unsigned long rz_mtu3_8bit_ch_reg_offs[][13] = {
+ {
+ [RZ_MTU3_TIER] = 0x4, [RZ_MTU3_NFCR] = 0x70,
+ [RZ_MTU3_TCR] = 0x0, [RZ_MTU3_TCR2] = 0x28,
+ [RZ_MTU3_TMDR1] = 0x1, [RZ_MTU3_TIORH] = 0x2,
+ [RZ_MTU3_TIORL] = 0x3
+ },
+ {
+ [RZ_MTU3_TIER] = 0x4, [RZ_MTU3_NFCR] = 0xef,
+ [RZ_MTU3_TSR] = 0x5, [RZ_MTU3_TCR] = 0x0,
+ [RZ_MTU3_TCR2] = 0x14, [RZ_MTU3_TMDR1] = 0x1,
+ [RZ_MTU3_TIOR] = 0x2
+ },
+ {
+ [RZ_MTU3_TIER] = 0x4, [RZ_MTU3_NFCR] = 0x16e,
+ [RZ_MTU3_TSR] = 0x5, [RZ_MTU3_TCR] = 0x0,
+ [RZ_MTU3_TCR2] = 0xc, [RZ_MTU3_TMDR1] = 0x1,
+ [RZ_MTU3_TIOR] = 0x2
+ },
+ {
+ [RZ_MTU3_TIER] = 0x8, [RZ_MTU3_NFCR] = 0x93,
+ [RZ_MTU3_TSR] = 0x2c, [RZ_MTU3_TCR] = 0x0,
+ [RZ_MTU3_TCR2] = 0x4c, [RZ_MTU3_TMDR1] = 0x2,
+ [RZ_MTU3_TIORH] = 0x4, [RZ_MTU3_TIORL] = 0x5,
+ [RZ_MTU3_TBTM] = 0x38
+ },
+ {
+ [RZ_MTU3_TIER] = 0x8, [RZ_MTU3_NFCR] = 0x93,
+ [RZ_MTU3_TSR] = 0x2c, [RZ_MTU3_TCR] = 0x0,
+ [RZ_MTU3_TCR2] = 0x4c, [RZ_MTU3_TMDR1] = 0x2,
+ [RZ_MTU3_TIORH] = 0x5, [RZ_MTU3_TIORL] = 0x6,
+ [RZ_MTU3_TBTM] = 0x38
+ },
+ {
+ [RZ_MTU3_TIER] = 0x32, [RZ_MTU3_NFCR] = 0x1eb,
+ [RZ_MTU3_TSTR] = 0x34, [RZ_MTU3_TCNTCMPCLR] = 0x36,
+ [RZ_MTU3_TCRU] = 0x4, [RZ_MTU3_TCR2U] = 0x5,
+ [RZ_MTU3_TIORU] = 0x6, [RZ_MTU3_TCRV] = 0x14,
+ [RZ_MTU3_TCR2V] = 0x15, [RZ_MTU3_TIORV] = 0x16,
+ [RZ_MTU3_TCRW] = 0x24, [RZ_MTU3_TCR2W] = 0x25,
+ [RZ_MTU3_TIORW] = 0x26
+ },
+ {
+ [RZ_MTU3_TIER] = 0x8, [RZ_MTU3_NFCR] = 0x93,
+ [RZ_MTU3_TSR] = 0x2c, [RZ_MTU3_TCR] = 0x0,
+ [RZ_MTU3_TCR2] = 0x4c, [RZ_MTU3_TMDR1] = 0x2,
+ [RZ_MTU3_TIORH] = 0x4, [RZ_MTU3_TIORL] = 0x5,
+ [RZ_MTU3_TBTM] = 0x38
+ },
+ {
+ [RZ_MTU3_TIER] = 0x8, [RZ_MTU3_NFCR] = 0x93,
+ [RZ_MTU3_TSR] = 0x2c, [RZ_MTU3_TCR] = 0x0,
+ [RZ_MTU3_TCR2] = 0x4c, [RZ_MTU3_TMDR1] = 0x2,
+ [RZ_MTU3_TIORH] = 0x5, [RZ_MTU3_TIORL] = 0x6,
+ [RZ_MTU3_TBTM] = 0x38
+ },
+ {
+ [RZ_MTU3_TIER] = 0x4, [RZ_MTU3_NFCR] = 0x368,
+ [RZ_MTU3_TCR] = 0x0, [RZ_MTU3_TCR2] = 0x6,
+ [RZ_MTU3_TMDR1] = 0x1, [RZ_MTU3_TIORH] = 0x2,
+ [RZ_MTU3_TIORL] = 0x3
+ }
+};
+
+static const unsigned long rz_mtu3_16bit_ch_reg_offs[][12] = {
+ {
+ [RZ_MTU3_TCNT] = 0x6, [RZ_MTU3_TGRA] = 0x8,
+ [RZ_MTU3_TGRB] = 0xa, [RZ_MTU3_TGRC] = 0xc,
+ [RZ_MTU3_TGRD] = 0xe, [RZ_MTU3_TGRE] = 0x20,
+ [RZ_MTU3_TGRF] = 0x22
+ },
+ {
+ [RZ_MTU3_TCNT] = 0x6, [RZ_MTU3_TGRA] = 0x8,
+ [RZ_MTU3_TGRB] = 0xa
+ },
+ {
+ [RZ_MTU3_TCNT] = 0x6, [RZ_MTU3_TGRA] = 0x8,
+ [RZ_MTU3_TGRB] = 0xa
+ },
+ {
+ [RZ_MTU3_TCNT] = 0x10, [RZ_MTU3_TGRA] = 0x18,
+ [RZ_MTU3_TGRB] = 0x1a, [RZ_MTU3_TGRC] = 0x24,
+ [RZ_MTU3_TGRD] = 0x26, [RZ_MTU3_TGRE] = 0x72
+ },
+ {
+ [RZ_MTU3_TCNT] = 0x11, [RZ_MTU3_TGRA] = 0x1b,
+ [RZ_MTU3_TGRB] = 0x1d, [RZ_MTU3_TGRC] = 0x27,
+ [RZ_MTU3_TGRD] = 0x29, [RZ_MTU3_TGRE] = 0x73,
+ [RZ_MTU3_TGRF] = 0x75, [RZ_MTU3_TADCR] = 0x3f,
+ [RZ_MTU3_TADCORA] = 0x43, [RZ_MTU3_TADCORB] = 0x45,
+ [RZ_MTU3_TADCOBRA] = 0x47,
+ [RZ_MTU3_TADCOBRB] = 0x49
+ },
+ {
+ [RZ_MTU3_TCNTU] = 0x0, [RZ_MTU3_TGRU] = 0x2,
+ [RZ_MTU3_TCNTV] = 0x10, [RZ_MTU3_TGRV] = 0x12,
+ [RZ_MTU3_TCNTW] = 0x20, [RZ_MTU3_TGRW] = 0x22
+ },
+ {
+ [RZ_MTU3_TCNT] = 0x10, [RZ_MTU3_TGRA] = 0x18,
+ [RZ_MTU3_TGRB] = 0x1a, [RZ_MTU3_TGRC] = 0x24,
+ [RZ_MTU3_TGRD] = 0x26, [RZ_MTU3_TGRE] = 0x72
+ },
+ {
+ [RZ_MTU3_TCNT] = 0x11, [RZ_MTU3_TGRA] = 0x1b,
+ [RZ_MTU3_TGRB] = 0x1d, [RZ_MTU3_TGRC] = 0x27,
+ [RZ_MTU3_TGRD] = 0x29, [RZ_MTU3_TGRE] = 0x73,
+ [RZ_MTU3_TGRF] = 0x75, [RZ_MTU3_TADCR] = 0x3f,
+ [RZ_MTU3_TADCORA] = 0x43, [RZ_MTU3_TADCORB] = 0x45,
+ [RZ_MTU3_TADCOBRA] = 0x47,
+ [RZ_MTU3_TADCOBRB] = 0x49
+ },
+};
+
+static const unsigned long rz_mtu3_32bit_ch_reg_offs[][5] = {
+ {
+ [RZ_MTU3_TCNTLW] = 0x20, [RZ_MTU3_TGRALW] = 0x24,
+ [RZ_MTU3_TGRBLW] = 0x28
+ },
+ { [RZ_MTU3_TCNT] = 0x8, [RZ_MTU3_TGRA] = 0xc,
+ [RZ_MTU3_TGRB] = 0x10, [RZ_MTU3_TGRC] = 0x14,
+ [RZ_MTU3_TGRD] = 0x18
+ }
+};
+
+static bool rz_mtu3_is_16bit_shared_reg(u16 off)
+{
+ return (off == RZ_MTU3_TDDRA || off == RZ_MTU3_TDDRB ||
+ off == RZ_MTU3_TCDRA || off == RZ_MTU3_TCDRB ||
+ off == RZ_MTU3_TCBRA || off == RZ_MTU3_TCBRB ||
+ off == RZ_MTU3_TCNTSA || off == RZ_MTU3_TCNTSB);
+}
+
+static u16 rz_mtu3_shared_reg_read(struct rz_mtu3_channel *ch, u16 off)
+{
+ struct rz_mtu3 *mtu = dev_get_drvdata(ch->dev);
+
+ if (rz_mtu3_is_16bit_shared_reg(off))
+ return readw(mtu->mmio + off);
+ else
+ return readb(mtu->mmio + off);
+}
+
+u8 rz_mtu3_8bit_ch_read(struct rz_mtu3_channel *ch, u16 off)
+{
+ u16 ch_offs;
+
+ ch_offs = rz_mtu3_8bit_ch_reg_offs[ch->index][off];
+ if (off != RZ_MTU3_TCR && ch_offs == 0)
+ return -EINVAL;
+
+ /*
+ * NFCR register addresses on MTU{0,1,2,5,8} channels are smaller than
+ * channel's base address.
+ */
+ if (off == RZ_MTU3_NFCR && (ch->index <= RZ_MTU2 ||
+ ch->index == RZ_MTU5 ||
+ ch->index == RZ_MTU8))
+ return readb(ch->base - ch_offs);
+ else
+ return readb(ch->base + ch_offs);
+}
+EXPORT_SYMBOL_GPL(rz_mtu3_8bit_ch_read);
+
+u16 rz_mtu3_16bit_ch_read(struct rz_mtu3_channel *ch, u16 off)
+{
+ u16 ch_offs;
+
+ /* MTU8 doesn't have 16-bit registers */
+ if (ch->index == RZ_MTU8)
+ return 0;
+
+ ch_offs = rz_mtu3_16bit_ch_reg_offs[ch->index][off];
+ if (ch->index != RZ_MTU5 && off != RZ_MTU3_TCNTU && ch_offs == 0)
+ return 0;
+
+ return readw(ch->base + ch_offs);
+}
+EXPORT_SYMBOL_GPL(rz_mtu3_16bit_ch_read);
+
+u32 rz_mtu3_32bit_ch_read(struct rz_mtu3_channel *ch, u16 off)
+{
+ u16 ch_offs;
+
+ if (ch->index == RZ_MTU1)
+ ch_offs = rz_mtu3_32bit_ch_reg_offs[0][off];
+ else if (ch->index == RZ_MTU8)
+ ch_offs = rz_mtu3_32bit_ch_reg_offs[1][off];
+
+ if (!ch_offs)
+ return -EINVAL;
+
+ return readl(ch->base + ch_offs);
+}
+EXPORT_SYMBOL_GPL(rz_mtu3_32bit_ch_read);
+
+void rz_mtu3_8bit_ch_write(struct rz_mtu3_channel *ch, u16 off, u8 val)
+{
+ u16 ch_offs;
+
+ ch_offs = rz_mtu3_8bit_ch_reg_offs[ch->index][off];
+ if (ch->index != RZ_MTU5 && off != RZ_MTU3_TCR && ch_offs == 0)
+ return;
+
+ /*
+ * NFCR register addresses on MTU{0,1,2,5,8} channels are smaller than
+ * channel's base address.
+ */
+ if (off == RZ_MTU3_NFCR && (ch->index <= RZ_MTU2 ||
+ ch->index == RZ_MTU5 ||
+ ch->index == RZ_MTU8))
+ writeb(val, ch->base - ch_offs);
+ else
+ writeb(val, ch->base + ch_offs);
+}
+EXPORT_SYMBOL_GPL(rz_mtu3_8bit_ch_write);
+
+void rz_mtu3_16bit_ch_write(struct rz_mtu3_channel *ch, u16 off, u16 val)
+{
+ u16 ch_offs;
+
+ /* MTU8 doesn't have 16-bit registers */
+ if (ch->index == RZ_MTU8)
+ return;
+
+ ch_offs = rz_mtu3_16bit_ch_reg_offs[ch->index][off];
+ if (ch->index != RZ_MTU5 && off != RZ_MTU3_TCNTU && ch_offs == 0)
+ return;
+
+ writew(val, ch->base + ch_offs);
+}
+EXPORT_SYMBOL_GPL(rz_mtu3_16bit_ch_write);
+
+void rz_mtu3_32bit_ch_write(struct rz_mtu3_channel *ch, u16 off, u32 val)
+{
+ u16 ch_offs;
+
+ if (ch->index == RZ_MTU1)
+ ch_offs = rz_mtu3_32bit_ch_reg_offs[0][off];
+ else if (ch->index == RZ_MTU8)
+ ch_offs = rz_mtu3_32bit_ch_reg_offs[1][off];
+
+ if (!ch_offs)
+ return;
+
+ writel(val, ch->base + ch_offs);
+}
+EXPORT_SYMBOL_GPL(rz_mtu3_32bit_ch_write);
+
+void rz_mtu3_shared_reg_write(struct rz_mtu3_channel *ch, u16 off, u16 value)
+{
+ struct rz_mtu3 *mtu = dev_get_drvdata(ch->dev);
+
+ if (rz_mtu3_is_16bit_shared_reg(off))
+ writew(value, mtu->mmio + off);
+ else
+ writeb((u8)value, mtu->mmio + off);
+}
+EXPORT_SYMBOL_GPL(rz_mtu3_shared_reg_write);
+
+static void rz_mtu3_start_stop_ch(struct rz_mtu3_channel *ch, bool start)
+{
+ struct rz_mtu3 *mtu = dev_get_drvdata(ch->dev);
+ unsigned long flags, value;
+ u8 offs;
+
+ /* start stop register shared by multiple timer channels */
+ raw_spin_lock_irqsave(&mtu->lock, flags);
+
+ if (ch->index == RZ_MTU6 || ch->index == RZ_MTU7) {
+ value = rz_mtu3_shared_reg_read(ch, RZ_MTU3_TSTRB);
+ if (start)
+ value |= 1 << ch->index;
+ else
+ value &= ~(1 << ch->index);
+ rz_mtu3_shared_reg_write(ch, RZ_MTU3_TSTRB, value);
+ } else if (ch->index != RZ_MTU5) {
+ value = rz_mtu3_shared_reg_read(ch, RZ_MTU3_TSTRA);
+ if (ch->index == RZ_MTU8)
+ offs = 0x08;
+ else if (ch->index < RZ_MTU3)
+ offs = 1 << ch->index;
+ else
+ offs = 1 << (ch->index + 3);
+ if (start)
+ value |= offs;
+ else
+ value &= ~offs;
+ rz_mtu3_shared_reg_write(ch, RZ_MTU3_TSTRA, value);
+ }
+
+ raw_spin_unlock_irqrestore(&mtu->lock, flags);
+}
+
+bool rz_mtu3_is_enabled(struct rz_mtu3_channel *ch)
+{
+ struct rz_mtu3 *mtu = dev_get_drvdata(ch->dev);
+ unsigned long flags, value;
+ bool ret = false;
+ u8 offs;
+
+ /* start stop register shared by multiple timer channels */
+ raw_spin_lock_irqsave(&mtu->lock, flags);
+
+ if (ch->index == RZ_MTU6 || ch->index == RZ_MTU7) {
+ value = rz_mtu3_shared_reg_read(ch, RZ_MTU3_TSTRB);
+ ret = value & (1 << ch->index);
+ } else if (ch->index != RZ_MTU5) {
+ value = rz_mtu3_shared_reg_read(ch, RZ_MTU3_TSTRA);
+ if (ch->index == RZ_MTU8)
+ offs = 0x08;
+ else if (ch->index < RZ_MTU3)
+ offs = 1 << ch->index;
+ else
+ offs = 1 << (ch->index + 3);
+
+ ret = value & offs;
+ }
+
+ raw_spin_unlock_irqrestore(&mtu->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 const unsigned int ch_reg_offsets[] = {
+ 0x100, 0x180, 0x200, 0x000, 0x001, 0xa80, 0x800, 0x801, 0x400
+};
+
+static void rz_mtu3_reset_assert(void *data)
+{
+ struct reset_control *rstc = data;
+
+ reset_control_assert(rstc);
+}
+
+static int __maybe_unused rz_mtu3_pm_runtime_suspend(struct device *dev)
+{
+ struct rz_mtu3 *ddata = dev_get_drvdata(dev);
+
+ clk_disable_unprepare(ddata->clk);
+
+ return 0;
+}
+
+static int __maybe_unused rz_mtu3_pm_runtime_resume(struct device *dev)
+{
+ struct rz_mtu3 *ddata = dev_get_drvdata(dev);
+
+ clk_prepare_enable(ddata->clk);
+
+ return 0;
+}
+
+static void rz_mtu3_pm_disable(void *data)
+{
+ pm_runtime_disable(data);
+ pm_runtime_set_suspended(data);
+}
+
+static const struct dev_pm_ops rz_mtu3_pm_ops = {
+ SET_RUNTIME_PM_OPS(rz_mtu3_pm_runtime_suspend, rz_mtu3_pm_runtime_resume, NULL)
+};
+
+static int rz_mtu3_probe(struct platform_device *pdev)
+{
+ struct reset_control *rstc;
+ struct rz_mtu3 *ddata;
+ unsigned int i;
+ int ret;
+
+ ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL);
+ if (!ddata)
+ return -ENOMEM;
+
+ ddata->mmio = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(ddata->mmio))
+ return PTR_ERR(ddata->mmio);
+
+ rstc = devm_reset_control_get_exclusive(&pdev->dev, NULL);
+ if (IS_ERR(rstc))
+ return PTR_ERR(rstc);
+
+ ret = devm_add_action_or_reset(&pdev->dev, rz_mtu3_reset_assert,
+ rstc);
+ if (ret < 0)
+ return ret;
+
+ ddata->clk = devm_clk_get(&pdev->dev, NULL);
+ if (IS_ERR(ddata->clk))
+ return PTR_ERR(ddata->clk);
+
+ raw_spin_lock_init(&ddata->lock);
+ reset_control_deassert(rstc);
+
+ clk_prepare_enable(ddata->clk);
+ pm_runtime_set_active(&pdev->dev);
+ pm_runtime_enable(&pdev->dev);
+ ret = devm_add_action_or_reset(&pdev->dev,
+ rz_mtu3_pm_disable,
+ &pdev->dev);
+ if (ret < 0)
+ goto disable_clock;
+
+ for (i = 0; i < RZ_MTU_NUM_CHANNELS; i++) {
+ ddata->channels[i].index = i;
+ ddata->channels[i].function = RZ_MTU3_NORMAL;
+ ddata->channels[i].base = ddata->mmio + ch_reg_offsets[i];
+ }
+
+ platform_set_drvdata(pdev, ddata);
+
+ rz_mtu3_cnt_probe(pdev);
+ rz_mtu3_pwm_probe(pdev);
+
+ return 0;
+
+disable_clock:
+ clk_disable_unprepare(ddata->clk);
+
+ 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",
+ .pm = &rz_mtu3_pm_ops,
+ .of_match_table = rz_mtu3_of_match,
+ },
+};
+module_platform_driver(rz_mtu3_driver);
+
+MODULE_AUTHOR("Biju Das <biju.das.jz@xxxxxxxxxxxxxx>");
+MODULE_DESCRIPTION("Renesas RZ/G2L MTU3 Driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/mfd/rz-mtu3.h b/drivers/mfd/rz-mtu3.h
new file mode 100644
index 000000000000..48949c05ec0e
--- /dev/null
+++ b/drivers/mfd/rz-mtu3.h
@@ -0,0 +1,221 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2022 Renesas Electronics Corporation
+ */
+
+#ifndef __LINUX_RZ_MTU3_H__
+#define __LINUX_RZ_MTU3_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 */
+#define RZ_MTU3_TMDR1 5 /* Timer mode register 1 */
+#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)
+
+struct platform_device;
+
+enum rz_mtu3_channels {
+ RZ_MTU0,
+ RZ_MTU1,
+ RZ_MTU2,
+ RZ_MTU3,
+ RZ_MTU4,
+ RZ_MTU5,
+ RZ_MTU6,
+ RZ_MTU7,
+ RZ_MTU8,
+ RZ_MTU_NUM_CHANNELS
+};
+
+enum rz_mtu3_functions {
+ RZ_MTU3_NORMAL,
+ RZ_MTU3_16BIT_PHASE_COUNTING,
+ RZ_MTU3_32BIT_PHASE_COUNTING,
+ RZ_MTU3_PWM_MODE_1,
+};
+
+/**
+ * struct rz_mtu3_channel - MTU3 channel private data
+ *
+ * @dev: device handle
+ * @index: channel index
+ * @base: channel base address
+ * @function: channel function
+ */
+struct rz_mtu3_channel {
+ struct device *dev;
+ unsigned int index;
+ void __iomem *base;
+ enum rz_mtu3_functions function;
+};
+
+/**
+ * struct rz_mtu3 - MTU3 MFD private data
+ *
+ * @clk: MTU3 module clock
+ * @mmio: MTU3 module clock
+ * @lock: Lock to protect shared register access
+ * @cnt_priv: counter private data
+ * @pwm_priv: pwm private data
+ * @rz_mtu3_channel: HW channels
+ */
+struct rz_mtu3 {
+ struct clk *clk;
+ void __iomem *mmio;
+ raw_spinlock_t lock; /* Protect the shared registers */
+ void *cnt_priv;
+ void *pwm_priv;
+ struct rz_mtu3_channel channels[RZ_MTU_NUM_CHANNELS];
+};
+
+#if IS_ENABLED(CONFIG_MFD_RZ_MTU3)
+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);
+
+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);
+#else
+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 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)
+{
+}
+#endif
+
+#if IS_ENABLED(CONFIG_MFD_RZ_MTU3_PWM)
+int rz_mtu3_pwm_probe(struct platform_device *pdev);
+#else
+static inline int rz_mtu3_pwm_probe(struct platform_device *pdev)
+{
+ return -ENODEV;
+}
+#endif
+
+#if IS_ENABLED(CONFIG_MFD_RZ_MTU3_CNT)
+int rz_mtu3_cnt_probe(struct platform_device *pdev);
+#else
+static inline int rz_mtu3_cnt_probe(struct platform_device *pdev)
+{
+ return -ENODEV;
+}
+#endif
+
+#endif /* __LINUX_RZ_MTU3_H__ */
--
2.25.1
