diff options
Diffstat (limited to 'target/linux/ath79/patches-4.19/410-spi-ath79-Implement-the-spi_mem-interface.patch')
| -rw-r--r-- | target/linux/ath79/patches-4.19/410-spi-ath79-Implement-the-spi_mem-interface.patch | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/target/linux/ath79/patches-4.19/410-spi-ath79-Implement-the-spi_mem-interface.patch b/target/linux/ath79/patches-4.19/410-spi-ath79-Implement-the-spi_mem-interface.patch new file mode 100644 index 0000000000..9546f32a27 --- /dev/null +++ b/target/linux/ath79/patches-4.19/410-spi-ath79-Implement-the-spi_mem-interface.patch @@ -0,0 +1,70 @@ +From 8d8cdb4a6ccee5b62cc0dc64651c3946364514dc Mon Sep 17 00:00:00 2001 +From: Luiz Angelo Daros de Luca <luizluca@gmail.com> +Date: Mon, 10 Feb 2020 16:11:27 -0300 +Subject: [PATCH] spi: ath79: Implement the spi_mem interface + +Signed-off-by: Luiz Angelo Daros de Luca <luizluca@gmail.com> +--- + drivers/spi/spi-ath79.c | 35 +++++++++++++++++++++++++++++++++++ + 1 file changed, 35 insertions(+) + +Index: linux-4.19.106/drivers/spi/spi-ath79.c +=================================================================== +--- linux-4.19.106.orig/drivers/spi/spi-ath79.c ++++ linux-4.19.106/drivers/spi/spi-ath79.c +@@ -19,6 +19,7 @@ + #include <linux/platform_device.h> + #include <linux/io.h> + #include <linux/spi/spi.h> ++#include <linux/spi/spi-mem.h> + #include <linux/spi/spi_bitbang.h> + #include <linux/bitops.h> + #include <linux/gpio.h> +@@ -203,6 +204,39 @@ static u32 ath79_spi_txrx_mode0(struct s + return ath79_spi_rr(sp, AR71XX_SPI_REG_RDS); + } + ++static int ath79_exec_mem_op(struct spi_mem *mem, ++ const struct spi_mem_op *op) ++{ ++ struct ath79_spi *sp = ath79_spidev_to_sp(mem->spi); ++ ++ /* Ensures that reading is performed on device connected ++ to hardware cs0 */ ++ if (mem->spi->chip_select || gpio_is_valid(mem->spi->cs_gpio)) ++ return -ENOTSUPP; ++ ++ /* Only use for fast-read op. */ ++ if (op->cmd.opcode != 0x0b || op->data.dir != SPI_MEM_DATA_IN || ++ op->addr.nbytes != 3 || op->dummy.nbytes != 1) ++ return -ENOTSUPP; ++ ++ /* disable GPIO mode */ ++ ath79_spi_wr(sp, AR71XX_SPI_REG_FS, 0); ++ ++ memcpy_fromio(op->data.buf.in, sp->base + op->addr.val, op->data.nbytes); ++ ++ /* enable GPIO mode */ ++ ath79_spi_wr(sp, AR71XX_SPI_REG_FS, AR71XX_SPI_FS_GPIO); ++ ++ /* restore IOC register */ ++ ath79_spi_wr(sp, AR71XX_SPI_REG_IOC, sp->ioc_base); ++ ++ return 0; ++} ++ ++static const struct spi_controller_mem_ops ath79_mem_ops = { ++ .exec_op = ath79_exec_mem_op, ++}; ++ + static int ath79_spi_probe(struct platform_device *pdev) + { + struct spi_master *master; +@@ -237,6 +271,7 @@ static int ath79_spi_probe(struct platfo + ret = PTR_ERR(sp->base); + goto err_put_master; + } ++ master->mem_ops = &ath79_mem_ops; + + sp->clk = devm_clk_get(&pdev->dev, "ahb"); + if (IS_ERR(sp->clk)) { |