pwm: dwc: split pci out of core driver

Moving towards adding non-pci support for the driver, move the pci
parts out of the core into their own module. This is partly due to
the module_driver() code only being allowed once in a module and also
to avoid a number of #ifdef if we build a single file in a system
without pci support.

Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Link: https://lore.kernel.org/r/20230907161242.67190-2-ben.dooks@codethink.co.uk
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>

1 files changed, 60 insertions, 0 deletions

diff --git a/drivers/pwm/pwm-dwc.h b/drivers/pwm/pwm-dwc.h
new file mode 100644
index 000000000000..56deab4e28ec
--- /dev/null
+++ b/drivers/pwm/pwm-dwc.h
@@ -0,0 +1,60 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * DesignWare PWM Controller driver
+ *
+ * Copyright (C) 2018-2020 Intel Corporation
+ *
+ * Author: Felipe Balbi (Intel)
+ * Author: Jarkko Nikula <jarkko.nikula@linux.intel.com>
+ * Author: Raymond Tan <raymond.tan@intel.com>
+ */
+
+MODULE_IMPORT_NS(dwc_pwm);
+
+#define DWC_TIM_LD_CNT(n)	((n) * 0x14)
+#define DWC_TIM_LD_CNT2(n)	(((n) * 4) + 0xb0)
+#define DWC_TIM_CUR_VAL(n)	(((n) * 0x14) + 0x04)
+#define DWC_TIM_CTRL(n)		(((n) * 0x14) + 0x08)
+#define DWC_TIM_EOI(n)		(((n) * 0x14) + 0x0c)
+#define DWC_TIM_INT_STS(n)	(((n) * 0x14) + 0x10)
+
+#define DWC_TIMERS_INT_STS	0xa0
+#define DWC_TIMERS_EOI		0xa4
+#define DWC_TIMERS_RAW_INT_STS	0xa8
+#define DWC_TIMERS_COMP_VERSION	0xac
+
+#define DWC_TIMERS_TOTAL	8
+#define DWC_CLK_PERIOD_NS	10
+
+/* Timer Control Register */
+#define DWC_TIM_CTRL_EN		BIT(0)
+#define DWC_TIM_CTRL_MODE	BIT(1)
+#define DWC_TIM_CTRL_MODE_FREE	(0 << 1)
+#define DWC_TIM_CTRL_MODE_USER	(1 << 1)
+#define DWC_TIM_CTRL_INT_MASK	BIT(2)
+#define DWC_TIM_CTRL_PWM	BIT(3)
+
+struct dwc_pwm_ctx {
+	u32 cnt;
+	u32 cnt2;
+	u32 ctrl;
+};
+
+struct dwc_pwm {
+	struct pwm_chip chip;
+	void __iomem *base;
+	struct dwc_pwm_ctx ctx[DWC_TIMERS_TOTAL];
+};
+#define to_dwc_pwm(p)	(container_of((p), struct dwc_pwm, chip))
+
+static inline u32 dwc_pwm_readl(struct dwc_pwm *dwc, u32 offset)
+{
+	return readl(dwc->base + offset);
+}
+
+static inline void dwc_pwm_writel(struct dwc_pwm *dwc, u32 value, u32 offset)
+{
+	writel(value, dwc->base + offset);
+}
+
+extern struct dwc_pwm *dwc_pwm_alloc(struct device *dev);