From: Ahmad Fatoum <a.fatoum@xxxxxxxxxxxxxx>
This driver adds support for PWM driver on STM32 platform
based on the Linux v5.4 support.
Signed-off-by: Ahmad Fatoum <a.fatoum@xxxxxxxxxxxxxx>
---
arch/arm/dts/stm32mp151.dtsi | 12 +
drivers/mfd/Kconfig | 7 +
drivers/mfd/Makefile | 1 +
drivers/mfd/stm32-timers.c | 74 ++++++
drivers/pwm/Kconfig | 6 +
drivers/pwm/Makefile | 1 +
drivers/pwm/pwm-stm32.c | 400 +++++++++++++++++++++++++++++++
include/linux/mfd/stm32-timers.h | 97 ++++++++
8 files changed, 598 insertions(+)
create mode 100644 drivers/mfd/stm32-timers.c
create mode 100644 drivers/pwm/pwm-stm32.c
create mode 100644 include/linux/mfd/stm32-timers.h
diff --git a/arch/arm/dts/stm32mp151.dtsi b/arch/arm/dts/stm32mp151.dtsi
index 2a70a747e76e..a0870c446f45 100644
--- a/arch/arm/dts/stm32mp151.dtsi
+++ b/arch/arm/dts/stm32mp151.dtsi
@@ -21,6 +21,18 @@
mmc0 = &sdmmc1;
mmc1 = &sdmmc2;
mmc2 = &sdmmc3;
+ pwm1 = &{/soc/timer@44000000/pwm};
+ pwm2 = &{/soc/timer@40000000/pwm};
+ pwm3 = &{/soc/timer@40001000/pwm};
+ pwm4 = &{/soc/timer@40002000/pwm};
+ pwm5 = &{/soc/timer@40003000/pwm};
+ pwm8 = &{/soc/timer@44001000/pwm};
+ pwm12 = &{/soc/timer@40006000/pwm};
+ pwm13 = &{/soc/timer@40007000/pwm};
+ pwm14 = &{/soc/timer@40008000/pwm};
+ pwm15 = &{/soc/timer@44006000/pwm};
+ pwm16 = &{/soc/timer@44007000/pwm};
+ pwm17 = &{/soc/timer@44008000/pwm};
};
psci {
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index f4cc71ef0ec8..ddf117712e77 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -82,4 +82,11 @@ config SMSC_SUPERIO
help
Select this to probe for IO-port connected SMSC Super I/O chips.
+config MFD_STM32_TIMERS
+ bool "STM32 Timers"
+ depends on ARCH_STM32MP
+ help
+ Select this to get regmap support for the timer blocks on STM32
+ MCUs and MPUs.
+
endmenu
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index 0c24493e3d86..a3b296a803f8 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -15,3 +15,4 @@ obj-$(CONFIG_MFD_STPMIC1) += stpmic1.o
obj-$(CONFIG_MFD_SUPERIO) += superio.o
obj-$(CONFIG_FINTEK_SUPERIO) += fintek-superio.o
obj-$(CONFIG_SMSC_SUPERIO) += smsc-superio.o
+obj-$(CONFIG_MFD_STM32_TIMERS) += stm32-timers.o
diff --git a/drivers/mfd/stm32-timers.c b/drivers/mfd/stm32-timers.c
new file mode 100644
index 000000000000..c53a25687e14
--- /dev/null
+++ b/drivers/mfd/stm32-timers.c
@@ -0,0 +1,74 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) STMicroelectronics 2016
+ * Author: Benjamin Gaignard <benjamin.gaignard@xxxxxx>
+ */
+
+#include <common.h>
+#include <linux/clk.h>
+#include <driver.h>
+#include <init.h>
+#include <io.h>
+#include <linux/bitfield.h>
+#include <linux/mfd/stm32-timers.h>
+#include <of.h>
+#include <linux/reset.h>
+
+#define STM32_TIMERS_MAX_REGISTERS 0x3fc
+
+static const struct regmap_config stm32_timers_regmap_cfg = {
+ .reg_bits = 32,
+ .val_bits = 32,
+ .reg_stride = sizeof(u32),
+ .max_register = STM32_TIMERS_MAX_REGISTERS,
+};
+
+static void stm32_timers_get_arr_size(struct stm32_timers *ddata)
+{
+ /*
+ * Only the available bits will be written so when readback
+ * we get the maximum value of auto reload register
+ */
+ regmap_write(ddata->regmap, TIM_ARR, ~0L);
+ regmap_read(ddata->regmap, TIM_ARR, &ddata->max_arr);
+ regmap_write(ddata->regmap, TIM_ARR, 0x0);
+}
+
+static int stm32_timers_probe(struct device_d *dev)
+{
+ struct stm32_timers *ddata;
+ struct resource *res;
+
+ ddata = xzalloc(sizeof(*ddata));
+
+ res = dev_request_mem_resource(dev, 0);
+ if (IS_ERR(res))
+ return PTR_ERR(res);
+
+ ddata->regmap = regmap_init_mmio_clk(dev, "int", IOMEM(res->start),
+ &stm32_timers_regmap_cfg);
+ if (IS_ERR(ddata->regmap))
+ return PTR_ERR(ddata->regmap);
+
+ ddata->clk = clk_get(dev, NULL);
+ if (IS_ERR(ddata->clk))
+ return PTR_ERR(ddata->clk);
+
+ stm32_timers_get_arr_size(ddata);
+
+ dev->priv = ddata;
+
+ return of_platform_populate(dev->device_node, NULL, dev);
+}
+
+static const struct of_device_id stm32_timers_of_match[] = {
+ { .compatible = "st,stm32-timers", },
+ { /* sentinel */ },
+};
+
+static struct driver_d stm32_timers_driver = {
+ .name = "stm32-timers",
+ .probe = stm32_timers_probe,
+ .of_compatible = stm32_timers_of_match,
+};
+coredevice_platform_driver(stm32_timers_driver);
diff --git a/drivers/pwm/Kconfig b/drivers/pwm/Kconfig
index 97c3deff107b..9268aac9122a 100644
--- a/drivers/pwm/Kconfig
+++ b/drivers/pwm/Kconfig
@@ -28,4 +28,10 @@ config PWM_MXS
help
This enables PWM support for Freescale i.MX23/i.MX28 SoCs
+config PWM_STM32
+ bool "STM32 PWM Support"
+ depends on ARCH_STM32MP
+ help
+ This enables PWM support for STM32 MCUs and MPUs.
+
endif
diff --git a/drivers/pwm/Makefile b/drivers/pwm/Makefile
index 46865a24eeb4..c0a27becefcd 100644
--- a/drivers/pwm/Makefile
+++ b/drivers/pwm/Makefile
@@ -2,3 +2,4 @@ obj-$(CONFIG_PWM) += core.o
obj-$(CONFIG_PWM_PXA) += pxa_pwm.o
obj-$(CONFIG_PWM_IMX) += pwm-imx.o
obj-$(CONFIG_PWM_MXS) += pwm-mxs.o
+obj-$(CONFIG_PWM_STM32) += pwm-stm32.o
diff --git a/drivers/pwm/pwm-stm32.c b/drivers/pwm/pwm-stm32.c
new file mode 100644
index 000000000000..061644e4d883
--- /dev/null
+++ b/drivers/pwm/pwm-stm32.c
@@ -0,0 +1,400 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2016 STMicroelectronics 2016
+ * Copyright (C) 2020 Pengutronix
+ *
+ * Author: Gerald Baeza <gerald.baeza@xxxxxx>
+ * Ahmad Fatoum <a.fatoum@xxxxxxxxxxxxxx>
+ */
+
+#include <common.h>
+#include <linux/clk.h>
+#include <driver.h>
+#include <init.h>
+#include <io.h>
+#include <linux/bitfield.h>
+#include <linux/mfd/stm32-timers.h>
+#include <linux/math64.h>
+#include <of.h>
+#include <pwm.h>
+
+#define CCMR_CHANNEL_SHIFT 8
+#define CCMR_CHANNEL_MASK 0xFF
+#define MAX_BREAKINPUT 2
+
+struct stm32_pwm {
+ struct clk *clk;
+ struct regmap *regmap;
+ u32 max_arr;
+ bool have_complementary_output;
+ struct pwm_chip pwms[4];
+};
+
+struct stm32_breakinput {
+ u32 index;
+ u32 level;
+ u32 filter;
+};
+
+#define for_each_stm32_pwm(i, chip, pwm) \
+ for (chip[i = 0] = pwm->pwms[0]; i < 4 && chip->ops; chip = chip[++i])
+
+static inline struct stm32_pwm *to_stm32_pwm_dev(struct pwm_chip *chip)
+{
+ struct pwm_chip (*pwms)[4] = (void *)&chip[-chip->id];
+ return container_of(pwms, struct stm32_pwm, pwms);
+}
+
+static u32 active_channels(struct stm32_pwm *dev)
+{
+ u32 ccer;
+
+ regmap_read(dev->regmap, TIM_CCER, &ccer);
+
+ return ccer & TIM_CCER_CCXE;
+}
+
+static int write_ccrx(struct stm32_pwm *dev, unsigned ch, u32 value)
+{
+ switch (ch) {
+ case 0:
+ return regmap_write(dev->regmap, TIM_CCR1, value);
+ case 1:
+ return regmap_write(dev->regmap, TIM_CCR2, value);
+ case 2:
+ return regmap_write(dev->regmap, TIM_CCR3, value);
+ case 3:
+ return regmap_write(dev->regmap, TIM_CCR4, value);
+ }
+ return -EINVAL;
+}
+
+#define TIM_CCER_CC12P (TIM_CCER_CC1P | TIM_CCER_CC2P)
+#define TIM_CCER_CC12E (TIM_CCER_CC1E | TIM_CCER_CC2E)
+#define TIM_CCER_CC34P (TIM_CCER_CC3P | TIM_CCER_CC4P)
+#define TIM_CCER_CC34E (TIM_CCER_CC3E | TIM_CCER_CC4E)
+
+static int stm32_pwm_set_polarity(struct stm32_pwm *priv, unsigned ch,
+ unsigned polarity)
+{
+ u32 mask;
+
+ mask = TIM_CCER_CC1P << (ch * 4);
+ if (priv->have_complementary_output)
+ mask |= TIM_CCER_CC1NP << (ch * 4);
+
+ regmap_update_bits(priv->regmap, TIM_CCER, mask,
+ polarity == PWM_POLARITY_NORMAL ? 0 : mask);
+
+ return 0;
+}
+
+static int stm32_pwm_config(struct stm32_pwm *priv, unsigned ch,
+ int duty_ns, int period_ns)
+{
+ unsigned long long prd, div, dty;
+ unsigned int prescaler = 0;
+ u32 ccmr, mask, shift;
+
+ /* Period and prescaler values depends on clock rate */
+ div = (unsigned long long)clk_get_rate(priv->clk) * period_ns;
+
+ do_div(div, NSEC_PER_SEC);
+ prd = div;
+
+ while (div > priv->max_arr) {
+ prescaler++;
+ div = prd;
+ do_div(div, prescaler + 1);
+ }
+
+ prd = div;
+
+ if (prescaler > MAX_TIM_PSC)
+ return -EINVAL;
+
+ /*
+ * All channels share the same prescaler and counter so when two
+ * channels are active at the same time we can't change them
+ */
+ if (active_channels(priv) & ~(1 << ch * 4)) {
+ u32 psc, arr;
+
+ regmap_read(priv->regmap, TIM_PSC, &psc);
+ regmap_read(priv->regmap, TIM_ARR, &arr);
+
+ if ((psc != prescaler) || (arr != prd - 1))
+ return -EBUSY;
+ }
+
+ regmap_write(priv->regmap, TIM_PSC, prescaler);
+ regmap_write(priv->regmap, TIM_ARR, prd - 1);
+ regmap_update_bits(priv->regmap, TIM_CR1, TIM_CR1_ARPE, TIM_CR1_ARPE);
+
+ /* Calculate the duty cycles */
+ dty = prd * duty_ns;
+ do_div(dty, period_ns);
+
+ write_ccrx(priv, ch, dty);
+
+ /* Configure output mode */
+ shift = (ch & 0x1) * CCMR_CHANNEL_SHIFT;
+ ccmr = (TIM_CCMR_PE | TIM_CCMR_M1) << shift;
+ mask = CCMR_CHANNEL_MASK << shift;
+
+ if (ch < 2)
+ regmap_update_bits(priv->regmap, TIM_CCMR1, mask, ccmr);
+ else
+ regmap_update_bits(priv->regmap, TIM_CCMR2, mask, ccmr);
+
+ regmap_update_bits(priv->regmap, TIM_BDTR,
+ TIM_BDTR_MOE | TIM_BDTR_AOE,
+ TIM_BDTR_MOE | TIM_BDTR_AOE);
+
+ return 0;
+}
+
+static int stm32_pwm_enable(struct stm32_pwm *priv, unsigned ch)
+{
+ u32 mask;
+ int ret;
+
+ ret = clk_enable(priv->clk);
+ if (ret)
+ return ret;
+
+ /* Enable channel */
+ mask = TIM_CCER_CC1E << (ch * 4);
+ if (priv->have_complementary_output)
+ mask |= TIM_CCER_CC1NE << (ch * 4);
+
+ regmap_update_bits(priv->regmap, TIM_CCER, mask, mask);
+
+ /* Make sure that registers are updated */
+ regmap_update_bits(priv->regmap, TIM_EGR, TIM_EGR_UG, TIM_EGR_UG);
+
+ /* Enable controller */
+ regmap_update_bits(priv->regmap, TIM_CR1, TIM_CR1_CEN, TIM_CR1_CEN);
+
+ return 0;
+}
+
+static void stm32_pwm_disable(struct stm32_pwm *priv, unsigned ch)
+{
+ u32 mask;
+
+ /* Disable channel */
+ mask = TIM_CCER_CC1E << (ch * 4);
+ if (priv->have_complementary_output)
+ mask |= TIM_CCER_CC1NE << (ch * 4);
+
+ regmap_update_bits(priv->regmap, TIM_CCER, mask, 0);
+
+ /* When all channels are disabled, we can disable the controller */
+ if (!active_channels(priv))
+ regmap_update_bits(priv->regmap, TIM_CR1, TIM_CR1_CEN, 0);
+
+ clk_disable(priv->clk);
+}
+
+static int stm32_pwm_apply(struct pwm_chip *chip, const struct pwm_state *state)
+{
+ bool enabled;
+ struct stm32_pwm *priv = to_stm32_pwm_dev(chip);
+ int ret;
+
+ enabled = chip->state.p_enable;
+
+ if (enabled && !state->p_enable) {
+ stm32_pwm_disable(priv, chip->id);
+ return 0;
+ }
+
+ if (state->polarity != chip->state.polarity)
+ stm32_pwm_set_polarity(priv, chip->id, state->polarity);
+
+ ret = stm32_pwm_config(priv, chip->id,
+ state->duty_ns, state->period_ns);
+ if (ret)
+ return ret;
+
+ if (!enabled && state->p_enable)
+ ret = stm32_pwm_enable(priv, chip->id);
+
+ return ret;
+}
+
+static const struct pwm_ops stm32pwm_ops = {
+ .apply = stm32_pwm_apply,
+};
+
+static int stm32_pwm_set_breakinput(struct stm32_pwm *priv,
+ int index, int level, int filter)
+{
+ u32 bke = (index == 0) ? TIM_BDTR_BKE : TIM_BDTR_BK2E;
+ int shift = (index == 0) ? TIM_BDTR_BKF_SHIFT : TIM_BDTR_BK2F_SHIFT;
+ u32 mask = (index == 0) ? TIM_BDTR_BKE | TIM_BDTR_BKP | TIM_BDTR_BKF
+ : TIM_BDTR_BK2E | TIM_BDTR_BK2P | TIM_BDTR_BK2F;
+ u32 bdtr = bke;
+
+ /*
+ * The both bits could be set since only one will be wrote
+ * due to mask value.
+ */
+ if (level)
+ bdtr |= TIM_BDTR_BKP | TIM_BDTR_BK2P;
+
+ bdtr |= (filter & TIM_BDTR_BKF_MASK) << shift;
+
+ regmap_update_bits(priv->regmap, TIM_BDTR, mask, bdtr);
+
+ regmap_read(priv->regmap, TIM_BDTR, &bdtr);
+
+ return (bdtr & bke) ? 0 : -EINVAL;
+}
+
+static int stm32_pwm_apply_breakinputs(struct stm32_pwm *priv,
+ struct device_node *np)
+{
+ struct stm32_breakinput breakinput[MAX_BREAKINPUT];
+ int nb, ret, i, array_size;
+
+ nb = of_property_count_elems_of_size(np, "st,breakinput",
+ sizeof(struct stm32_breakinput));
+
+ /*
+ * Because "st,breakinput" parameter is optional do not make probe
+ * failed if it doesn't exist.
+ */
+ if (nb <= 0)
+ return 0;
+
+ if (nb > MAX_BREAKINPUT)
+ return -EINVAL;
+
+ array_size = nb * sizeof(struct stm32_breakinput) / sizeof(u32);
+ ret = of_property_read_u32_array(np, "st,breakinput",
+ (u32 *)breakinput, array_size);
+ if (ret)
+ return ret;
+
+ for (i = 0; i < nb && !ret; i++) {
+ ret = stm32_pwm_set_breakinput(priv,
+ breakinput[i].index,
+ breakinput[i].level,
+ breakinput[i].filter);
+ }
+
+ return ret;
+}
+
+static void stm32_pwm_detect_complementary(struct stm32_pwm *priv)
+{
+ u32 ccer;
+
+ /*
+ * If complementary bit doesn't exist writing 1 will have no
+ * effect so we can detect it.
+ */
+ regmap_update_bits(priv->regmap,
+ TIM_CCER, TIM_CCER_CC1NE, TIM_CCER_CC1NE);
+ regmap_read(priv->regmap, TIM_CCER, &ccer);
+ regmap_update_bits(priv->regmap, TIM_CCER, TIM_CCER_CC1NE, 0);
+
+ priv->have_complementary_output = (ccer != 0);
+}
+
+static int stm32_pwm_detect_channels(struct stm32_pwm *priv)
+{
+ u32 ccer;
+ int npwm = 0;
+
+ /*
+ * If channels enable bits don't exist writing 1 will have no
+ * effect so we can detect and count them.
+ */
+ regmap_update_bits(priv->regmap,
+ TIM_CCER, TIM_CCER_CCXE, TIM_CCER_CCXE);
+ regmap_read(priv->regmap, TIM_CCER, &ccer);
+ regmap_update_bits(priv->regmap, TIM_CCER, TIM_CCER_CCXE, 0);
+
+ if (ccer & TIM_CCER_CC1E)
+ npwm++;
+
+ if (ccer & TIM_CCER_CC2E)
+ npwm++;
+
+ if (ccer & TIM_CCER_CC3E)
+ npwm++;
+
+ if (ccer & TIM_CCER_CC4E)
+ npwm++;
+
+ return npwm;
+}
+
+static int id = -1;
+
+static int stm32_pwm_probe(struct device_d *dev)
+{
+ struct device_node *np = dev->device_node;
+ struct stm32_timers *ddata = dev->parent->priv;
+ struct stm32_pwm *priv;
+ const char *alias;
+ int ret, i;
+ int npwms;
+
+ priv = xzalloc(sizeof(*priv));
+ dev->priv = priv;
+
+ priv->regmap = ddata->regmap;
+ priv->clk = ddata->clk;
+ priv->max_arr = ddata->max_arr;
+
+ if (!priv->regmap || !priv->clk)
+ return -EINVAL;
+
+ ret = stm32_pwm_apply_breakinputs(priv, np);
+ if (ret)
+ return ret;
+
+ stm32_pwm_detect_complementary(priv);
+
+ npwms = stm32_pwm_detect_channels(priv);
+
+ alias = of_alias_get(dev->device_node);
+ if (!alias)
+ id++;
+
+ for (i = 0; i < npwms; i++) {
+ struct pwm_chip *chip = &priv->pwms[i];
+
+ if (alias)
+ chip->devname = basprintf("%sch%u", alias, i + 1);
+ else
+ chip->devname = basprintf("pwm%uch%u", id, i + 1);
+
+ chip->ops = &stm32pwm_ops;
+ chip->id = i;
+
+ ret = pwmchip_add(chip, dev);
+ if (ret < 0) {
+ dev_err(dev, "failed to add pwm chip %d\n", ret);
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
+static const struct of_device_id stm32_pwm_of_match[] = {
+ { .compatible = "st,stm32-pwm", },
+ { /* sentinel */ },
+};
+
+static struct driver_d stm32_pwm_driver = {
+ .name = "stm32-pwm",
+ .probe = stm32_pwm_probe,
+ .of_compatible = stm32_pwm_of_match,
+};
+coredevice_platform_driver(stm32_pwm_driver);
diff --git a/include/linux/mfd/stm32-timers.h b/include/linux/mfd/stm32-timers.h
new file mode 100644
index 000000000000..28fad44598f9
--- /dev/null
+++ b/include/linux/mfd/stm32-timers.h
@@ -0,0 +1,97 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) STMicroelectronics 2016
+ * Author: Benjamin Gaignard <benjamin.gaignard@xxxxxx>
+ */
+
+#ifndef _LINUX_STM32_GPTIMER_H_
+#define _LINUX_STM32_GPTIMER_H_
+
+#include <clock.h>
+#include <regmap.h>
+
+#define TIM_CR1 0x00 /* Control Register 1 */
+#define TIM_CR2 0x04 /* Control Register 2 */
+#define TIM_SMCR 0x08 /* Slave mode control reg */
+#define TIM_DIER 0x0C /* DMA/interrupt register */
+#define TIM_SR 0x10 /* Status register */
+#define TIM_EGR 0x14 /* Event Generation Reg */
+#define TIM_CCMR1 0x18 /* Capt/Comp 1 Mode Reg */
+#define TIM_CCMR2 0x1C /* Capt/Comp 2 Mode Reg */
+#define TIM_CCER 0x20 /* Capt/Comp Enable Reg */
+#define TIM_CNT 0x24 /* Counter */
+#define TIM_PSC 0x28 /* Prescaler */
+#define TIM_ARR 0x2c /* Auto-Reload Register */
+#define TIM_CCR1 0x34 /* Capt/Comp Register 1 */
+#define TIM_CCR2 0x38 /* Capt/Comp Register 2 */
+#define TIM_CCR3 0x3C /* Capt/Comp Register 3 */
+#define TIM_CCR4 0x40 /* Capt/Comp Register 4 */
+#define TIM_BDTR 0x44 /* Break and Dead-Time Reg */
+#define TIM_DCR 0x48 /* DMA control register */
+#define TIM_DMAR 0x4C /* DMA register for transfer */
+
+#define TIM_CR1_CEN BIT(0) /* Counter Enable */
+#define TIM_CR1_DIR BIT(4) /* Counter Direction */
+#define TIM_CR1_ARPE BIT(7) /* Auto-reload Preload Ena */
+#define TIM_CR2_MMS (BIT(4) | BIT(5) | BIT(6)) /* Master mode selection */
+#define TIM_CR2_MMS2 GENMASK(23, 20) /* Master mode selection 2 */
+#define TIM_SMCR_SMS (BIT(0) | BIT(1) | BIT(2)) /* Slave mode selection */
+#define TIM_SMCR_TS (BIT(4) | BIT(5) | BIT(6)) /* Trigger selection */
+#define TIM_DIER_UIE BIT(0) /* Update interrupt */
+#define TIM_DIER_UDE BIT(8) /* Update DMA request Enable */
+#define TIM_DIER_CC1DE BIT(9) /* CC1 DMA request Enable */
+#define TIM_DIER_CC2DE BIT(10) /* CC2 DMA request Enable */
+#define TIM_DIER_CC3DE BIT(11) /* CC3 DMA request Enable */
+#define TIM_DIER_CC4DE BIT(12) /* CC4 DMA request Enable */
+#define TIM_DIER_COMDE BIT(13) /* COM DMA request Enable */
+#define TIM_DIER_TDE BIT(14) /* Trigger DMA request Enable */
+#define TIM_SR_UIF BIT(0) /* Update interrupt flag */
+#define TIM_EGR_UG BIT(0) /* Update Generation */
+#define TIM_CCMR_PE BIT(3) /* Channel Preload Enable */
+#define TIM_CCMR_M1 (BIT(6) | BIT(5)) /* Channel PWM Mode 1 */
+#define TIM_CCMR_CC1S (BIT(0) | BIT(1)) /* Capture/compare 1 sel */
+#define TIM_CCMR_IC1PSC GENMASK(3, 2) /* Input capture 1 prescaler */
+#define TIM_CCMR_CC2S (BIT(8) | BIT(9)) /* Capture/compare 2 sel */
+#define TIM_CCMR_IC2PSC GENMASK(11, 10) /* Input capture 2 prescaler */
+#define TIM_CCMR_CC1S_TI1 BIT(0) /* IC1/IC3 selects TI1/TI3 */
+#define TIM_CCMR_CC1S_TI2 BIT(1) /* IC1/IC3 selects TI2/TI4 */
+#define TIM_CCMR_CC2S_TI2 BIT(8) /* IC2/IC4 selects TI2/TI4 */
+#define TIM_CCMR_CC2S_TI1 BIT(9) /* IC2/IC4 selects TI1/TI3 */
+#define TIM_CCER_CC1E BIT(0) /* Capt/Comp 1 out Ena */
+#define TIM_CCER_CC1P BIT(1) /* Capt/Comp 1 Polarity */
+#define TIM_CCER_CC1NE BIT(2) /* Capt/Comp 1N out Ena */
+#define TIM_CCER_CC1NP BIT(3) /* Capt/Comp 1N Polarity */
+#define TIM_CCER_CC2E BIT(4) /* Capt/Comp 2 out Ena */
+#define TIM_CCER_CC2P BIT(5) /* Capt/Comp 2 Polarity */
+#define TIM_CCER_CC3E BIT(8) /* Capt/Comp 3 out Ena */
+#define TIM_CCER_CC3P BIT(9) /* Capt/Comp 3 Polarity */
+#define TIM_CCER_CC4E BIT(12) /* Capt/Comp 4 out Ena */
+#define TIM_CCER_CC4P BIT(13) /* Capt/Comp 4 Polarity */
+#define TIM_CCER_CCXE (BIT(0) | BIT(4) | BIT(8) | BIT(12))
+#define TIM_BDTR_BKE BIT(12) /* Break input enable */
+#define TIM_BDTR_BKP BIT(13) /* Break input polarity */
+#define TIM_BDTR_AOE BIT(14) /* Automatic Output Enable */
+#define TIM_BDTR_MOE BIT(15) /* Main Output Enable */
+#define TIM_BDTR_BKF (BIT(16) | BIT(17) | BIT(18) | BIT(19))
+#define TIM_BDTR_BK2F (BIT(20) | BIT(21) | BIT(22) | BIT(23))
+#define TIM_BDTR_BK2E BIT(24) /* Break 2 input enable */
+#define TIM_BDTR_BK2P BIT(25) /* Break 2 input polarity */
+#define TIM_DCR_DBA GENMASK(4, 0) /* DMA base addr */
+#define TIM_DCR_DBL GENMASK(12, 8) /* DMA burst len */
+
+#define MAX_TIM_PSC 0xFFFF
+#define MAX_TIM_ICPSC 0x3
+#define TIM_CR2_MMS_SHIFT 4
+#define TIM_CR2_MMS2_SHIFT 20
+#define TIM_SMCR_TS_SHIFT 4
+#define TIM_BDTR_BKF_MASK 0xF
+#define TIM_BDTR_BKF_SHIFT 16
+#define TIM_BDTR_BK2F_SHIFT 20
+
+struct stm32_timers {
+ struct clk *clk;
+ struct regmap *regmap;
+ u32 max_arr;
+};
+
+#endif
--
2.20.1
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