From a52e3a9dba347134ee53ebfe68b7b22548a387b0 Mon Sep 17 00:00:00 2001 From: Charles Perry Date: Thu, 21 Mar 2024 18:04:33 -0400 Subject: fpga: xilinx-spi: extract a common driver core Factor out the gpio handshaking (using PROGRAM_B, INIT_B and DONE) protocol in xilinx-core so that it can be reused for another driver. This commit does not change anything functionally to xilinx-spi. xilinx-core expects drivers to provide a write(const char* buf, size_t count) function that performs the actual write to the device, as well as a struct device* for resource management. Signed-off-by: Charles Perry Acked-by: Xu Yilun Link: https://lore.kernel.org/r/20240321220447.3260065-2-charles.perry@savoirfairelinux.com Signed-off-by: Xu Yilun --- drivers/fpga/xilinx-core.h | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) create mode 100644 drivers/fpga/xilinx-core.h (limited to 'drivers/fpga/xilinx-core.h') diff --git a/drivers/fpga/xilinx-core.h b/drivers/fpga/xilinx-core.h new file mode 100644 index 000000000000..f02ac67fce7b --- /dev/null +++ b/drivers/fpga/xilinx-core.h @@ -0,0 +1,27 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +#ifndef __XILINX_CORE_H +#define __XILINX_CORE_H + +#include + +/** + * struct xilinx_fpga_core - interface between the driver and the core manager + * of Xilinx 7 Series FPGA manager + * @dev: device node + * @write: write callback of the driver + */ +struct xilinx_fpga_core { +/* public: */ + struct device *dev; + int (*write)(struct xilinx_fpga_core *core, const char *buf, + size_t count); +/* private: handled by xilinx-core */ + struct gpio_desc *prog_b; + struct gpio_desc *init_b; + struct gpio_desc *done; +}; + +int xilinx_core_probe(struct xilinx_fpga_core *core); + +#endif /* __XILINX_CORE_H */ -- cgit