[PATCH v2 2/2] spi: s3c64xx: Add Exynos850 support

From: Sam Protsenko <semen.protsenko@linaro.org>
To: Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
	Andi Shyti <andi.shyti@kernel.org>,
	Mark Brown <broonie@kernel.org>, Rob Herring <robh+dt@kernel.org>,
	Conor Dooley <conor+dt@kernel.org>
Cc: Tudor Ambarus <tudor.ambarus@linaro.org>,
	Alim Akhtar <alim.akhtar@samsung.com>,
	Sylwester Nawrocki <s.nawrocki@samsung.com>,
	Tomasz Figa <tomasz.figa@gmail.com>,
	Chanwoo Choi <cw00.choi@samsung.com>,
	linux-spi@vger.kernel.org, linux-samsung-soc@vger.kernel.org,
	devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org
Subject: [PATCH v2 2/2] spi: s3c64xx: Add Exynos850 support
Date: Wed, 24 Jan 2024 19:35:36 -0600	[thread overview]
Message-ID: <20240125013536.30887-3-semen.protsenko@linaro.org> (raw)
In-Reply-To: <20240125013536.30887-1-semen.protsenko@linaro.org>

Add SPI port configuration for Exynos850 SoC. It has 3 USI blocks which
can be configured in SPI mode:

  * spi_0: BLK_PERI_SPI_0 (0x13940000)
  * spi_1: BLK_ALIVE_USI_CMGP00 (0x11d00000)
  * spi_2: BLK_ALIVE_USI_CMGP01 (0x11d20000)

SPI FIFO depth is 64 bytes for all those SPI blocks, so the
.fifo_lvl_mask value is set to 0x7f. All blocks have DIV_4 as the
default internal clock divider, and an internal loopback mode to run
a loopback test.

Signed-off-by: Sam Protsenko <semen.protsenko@linaro.org>
Reviewed-by: Tudor Ambarus <tudor.ambarus@linaro.org>
---
Changes in v2:
  - Collected R-b tags

 drivers/spi/spi-s3c64xx.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/drivers/spi/spi-s3c64xx.c b/drivers/spi/spi-s3c64xx.c
index 432ec60d3568..7f7eb8f742e4 100644
--- a/drivers/spi/spi-s3c64xx.c
+++ b/drivers/spi/spi-s3c64xx.c
@@ -1460,6 +1460,17 @@ static const struct s3c64xx_spi_port_config exynos5433_spi_port_config = {
 	.quirks		= S3C64XX_SPI_QUIRK_CS_AUTO,
 };
 
+static const struct s3c64xx_spi_port_config exynos850_spi_port_config = {
+	.fifo_lvl_mask	= { 0x7f, 0x7f, 0x7f },
+	.rx_lvl_offset	= 15,
+	.tx_st_done	= 25,
+	.clk_div	= 4,
+	.high_speed	= true,
+	.clk_from_cmu	= true,
+	.has_loopback	= true,
+	.quirks		= S3C64XX_SPI_QUIRK_CS_AUTO,
+};
+
 static const struct s3c64xx_spi_port_config exynosautov9_spi_port_config = {
 	.fifo_lvl_mask	= { 0x1ff, 0x1ff, 0x7f, 0x7f, 0x7f, 0x7f, 0x1ff, 0x7f,
 			    0x7f, 0x7f, 0x7f, 0x7f},
@@ -1514,6 +1525,9 @@ static const struct of_device_id s3c64xx_spi_dt_match[] = {
 	{ .compatible = "samsung,exynos5433-spi",
 			.data = (void *)&exynos5433_spi_port_config,
 	},
+	{ .compatible = "samsung,exynos850-spi",
+			.data = (void *)&exynos850_spi_port_config,
+	},
 	{ .compatible = "samsung,exynosautov9-spi",
 			.data = (void *)&exynosautov9_spi_port_config,
 	},
-- 
2.39.2

