992f1a3d4e
Add the basic skeleton for a new platform driver for the microcontroller found on the Turris Omnia board. Signed-off-by: Marek Behún <kabel@kernel.org> Reviewed-by: Andy Shevchenko <andy@kernel.org> Acked-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org> Link: https://lore.kernel.org/r/20240701113010.16447-3-kabel@kernel.org Signed-off-by: Arnd Bergmann <arnd@arndb.de>
74 lines
1.5 KiB
C
74 lines
1.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* CZ.NIC's Turris Omnia MCU driver
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*
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* 2024 by Marek Behún <kabel@kernel.org>
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*/
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#ifndef __TURRIS_OMNIA_MCU_H
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#define __TURRIS_OMNIA_MCU_H
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#include <linux/if_ether.h>
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#include <linux/types.h>
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#include <asm/byteorder.h>
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struct i2c_client;
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struct omnia_mcu {
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struct i2c_client *client;
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const char *type;
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u32 features;
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/* board information */
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u64 board_serial_number;
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u8 board_first_mac[ETH_ALEN];
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u8 board_revision;
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};
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int omnia_cmd_write_read(const struct i2c_client *client,
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void *cmd, unsigned int cmd_len,
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void *reply, unsigned int reply_len);
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static inline int omnia_cmd_read(const struct i2c_client *client, u8 cmd,
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void *reply, unsigned int len)
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{
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return omnia_cmd_write_read(client, &cmd, 1, reply, len);
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}
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static inline int omnia_cmd_read_u32(const struct i2c_client *client, u8 cmd,
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u32 *dst)
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{
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__le32 reply;
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int err;
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err = omnia_cmd_read(client, cmd, &reply, sizeof(reply));
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if (err)
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return err;
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*dst = le32_to_cpu(reply);
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return 0;
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}
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static inline int omnia_cmd_read_u16(const struct i2c_client *client, u8 cmd,
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u16 *dst)
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{
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__le16 reply;
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int err;
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err = omnia_cmd_read(client, cmd, &reply, sizeof(reply));
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if (err)
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return err;
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*dst = le16_to_cpu(reply);
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return 0;
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}
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static inline int omnia_cmd_read_u8(const struct i2c_client *client, u8 cmd,
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u8 *reply)
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{
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return omnia_cmd_read(client, cmd, reply, sizeof(*reply));
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}
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#endif /* __TURRIS_OMNIA_MCU_H */
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