1 files changed, 96 insertions, 0 deletions
diff --git a/include/linux/omap-gpmc.h b/include/linux/omap-gpmc.h
new file mode 100644
index 000000000..082841908
--- /dev/null
+++ b/include/linux/omap-gpmc.h
@@ -0,0 +1,96 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ *  OMAP GPMC (General Purpose Memory Controller) defines
+ */
+
+#include <linux/platform_data/gpmc-omap.h>
+
+#define GPMC_CONFIG_WP		0x00000005
+
+/* IRQ numbers in GPMC IRQ domain for legacy boot use */
+#define GPMC_IRQ_FIFOEVENTENABLE	0
+#define GPMC_IRQ_COUNT_EVENT		1
+
+/**
+ * gpmc_nand_ops - Interface between NAND and GPMC
+ * @nand_write_buffer_empty: get the NAND write buffer empty status.
+ */
+struct gpmc_nand_ops {
+	bool (*nand_writebuffer_empty)(void);
+};
+
+struct gpmc_nand_regs;
+
+struct gpmc_onenand_info {
+	bool sync_read;
+	bool sync_write;
+	int burst_len;
+};
+
+#if IS_ENABLED(CONFIG_OMAP_GPMC)
+struct gpmc_nand_ops *gpmc_omap_get_nand_ops(struct gpmc_nand_regs *regs,
+					     int cs);
+/**
+ * gpmc_omap_onenand_set_timings - set optimized sync timings.
+ * @cs:      Chip Select Region
+ * @freq:    Chip frequency
+ * @latency: Burst latency cycle count
+ * @info:    Structure describing parameters used
+ *
+ * Sets optimized timings for the @cs region based on @freq and @latency.
+ * Updates the @info structure based on the GPMC settings.
+ */
+int gpmc_omap_onenand_set_timings(struct device *dev, int cs, int freq,
+				  int latency,
+				  struct gpmc_onenand_info *info);
+
+#else
+static inline struct gpmc_nand_ops *gpmc_omap_get_nand_ops(struct gpmc_nand_regs *regs,
+							   int cs)
+{
+	return NULL;
+}
+
+static inline
+int gpmc_omap_onenand_set_timings(struct device *dev, int cs, int freq,
+				  int latency,
+				  struct gpmc_onenand_info *info)
+{
+	return -EINVAL;
+}
+#endif /* CONFIG_OMAP_GPMC */
+
+extern int gpmc_calc_timings(struct gpmc_timings *gpmc_t,
+			     struct gpmc_settings *gpmc_s,
+			     struct gpmc_device_timings *dev_t);
+
+struct device_node;
+
+extern int gpmc_get_client_irq(unsigned irq_config);
+
+extern unsigned int gpmc_ticks_to_ns(unsigned int ticks);
+
+extern void gpmc_cs_write_reg(int cs, int idx, u32 val);
+extern int gpmc_calc_divider(unsigned int sync_clk);
+extern int gpmc_cs_set_timings(int cs, const struct gpmc_timings *t,
+			       const struct gpmc_settings *s);
+extern int gpmc_cs_program_settings(int cs, struct gpmc_settings *p);
+extern int gpmc_cs_request(int cs, unsigned long size, unsigned long *base);
+extern void gpmc_cs_free(int cs);
+extern int gpmc_configure(int cmd, int wval);
+extern void gpmc_read_settings_dt(struct device_node *np,
+				  struct gpmc_settings *p);
+
+struct gpmc_timings;
+struct omap_nand_platform_data;
+struct omap_onenand_platform_data;
+
+#if IS_ENABLED(CONFIG_MTD_ONENAND_OMAP2)
+extern int gpmc_onenand_init(struct omap_onenand_platform_data *d);
+#else
+#define board_onenand_data	NULL
+static inline int gpmc_onenand_init(struct omap_onenand_platform_data *d)
+{
+	return 0;
+}
+#endif