spi: rockchip: Support 64-location deep FIFOs (13a96935) · Commits · 戴 / test

drivers/spi/spi-rockchip.c

+14 −11

Original line number	Diff line number	Diff line
		@@ -41,6 +41,7 @@
		#define ROCKCHIP_SPI_DMACR 0x003c
		#define ROCKCHIP_SPI_DMATDLR 0x0040
		#define ROCKCHIP_SPI_DMARDLR 0x0044
		#define ROCKCHIP_SPI_VERSION 0x0048
		#define ROCKCHIP_SPI_TXDR 0x0400
		#define ROCKCHIP_SPI_RXDR 0x0800

		@@ -156,6 +157,8 @@
		#define ROCKCHIP_SPI_MAX_TRANLEN 0xffff

		#define ROCKCHIP_SPI_MAX_CS_NUM 2
		#define ROCKCHIP_SPI_VER2_TYPE1 0x05EC0002
		#define ROCKCHIP_SPI_VER2_TYPE2 0x00110002

		struct rockchip_spi {
		struct device *dev;
		@@ -206,17 +209,17 @@ static inline void wait_for_idle(struct rockchip_spi *rs)

		static u32 get_fifo_len(struct rockchip_spi *rs)
		{
		u32 fifo;
		u32 ver;

		for (fifo = 2; fifo < 32; fifo++) {
		writel_relaxed(fifo, rs->regs + ROCKCHIP_SPI_TXFTLR);
		if (fifo != readl_relaxed(rs->regs + ROCKCHIP_SPI_TXFTLR))
		break;
		}

		writel_relaxed(0, rs->regs + ROCKCHIP_SPI_TXFTLR);
		ver = readl_relaxed(rs->regs + ROCKCHIP_SPI_VERSION);

		return (fifo == 31) ? 0 : fifo;
		switch (ver) {
		case ROCKCHIP_SPI_VER2_TYPE1:
		case ROCKCHIP_SPI_VER2_TYPE2:
		return 64;
		default:
		return 32;
		}
		}

		static void rockchip_spi_set_cs(struct spi_device *spi, bool enable)