spi/pl022: Add loopback support for the SPI on 5500 (06fb01fd) · Commits · 戴 / test

drivers/spi/amba-pl022.c

+19 −1

Original line number	Diff line number	Diff line
		@@ -324,6 +324,7 @@ struct vendor_data {
		bool unidir;
		bool extended_cr;
		bool pl023;
		bool loopback;
		};

		/**
		@@ -1983,7 +1984,7 @@ static int pl022_setup(struct spi_device *spi)

		SSP_WRITE_BITS(chip->cr0, clk_freq.scr, SSP_CR0_MASK_SCR, 8);
		/* Loopback is available on all versions except PL023 */
		if (!pl022->vendor->pl023) {
		if (pl022->vendor->loopback) {
		if (spi->mode & SPI_LOOP)
		tmp = LOOPBACK_ENABLED;
		else
		@@ -2233,6 +2234,7 @@ static struct vendor_data vendor_arm = {
		.unidir = false,
		.extended_cr = false,
		.pl023 = false,
		.loopback = true,
		};


		@@ -2242,6 +2244,7 @@ static struct vendor_data vendor_st = {
		.unidir = false,
		.extended_cr = true,
		.pl023 = false,
		.loopback = true,
		};

		static struct vendor_data vendor_st_pl023 = {
		@@ -2250,6 +2253,16 @@ static struct vendor_data vendor_st_pl023 = {
		.unidir = false,
		.extended_cr = true,
		.pl023 = true,
		.loopback = false,
		};

		static struct vendor_data vendor_db5500_pl023 = {
		.fifodepth = 32,
		.max_bpw = 32,
		.unidir = false,
		.extended_cr = true,
		.pl023 = true,
		.loopback = true,
		};

		static struct amba_id pl022_ids[] = {
		@@ -2283,6 +2296,11 @@ static struct amba_id pl022_ids[] = {
		.mask = 0xffffffff,
		.data = &vendor_st_pl023,
		},
		{
		.id = 0x10080023,
		.mask = 0xffffffff,
		.data = &vendor_db5500_pl023,
		},
		{ 0, 0 },
		};