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Message-ID: <20240207111516.2563218-5-tudor.ambarus@linaro.org>
Date: Wed, 7 Feb 2024 11:15:16 +0000
From: Tudor Ambarus <tudor.ambarus@...aro.org>
To: broonie@...nel.org,
andi.shyti@...nel.org,
semen.protsenko@...aro.org
Cc: krzysztof.kozlowski@...aro.org,
alim.akhtar@...sung.com,
linux-spi@...r.kernel.org,
linux-samsung-soc@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org,
linux-kernel@...r.kernel.org,
andre.draszik@...aro.org,
peter.griffin@...aro.org,
kernel-team@...roid.com,
willmcvicker@...gle.com,
robh+dt@...nel.org,
conor+dt@...nel.org,
devicetree@...r.kernel.org,
Tudor Ambarus <tudor.ambarus@...aro.org>
Subject: [PATCH v2 4/4] spi: s3c64xx: add support for google,gs101-spi
Add support for GS101 SPI. GS101 integrates 16 SPI nodes, all with 64
bytes FIFOs. GS101 allows just 32 bit register accesses, otherwise a
Serror Interrupt is raised. Do the write reg accesses in 32 bits.
Reviewed-by: Sam Protsenko <semen.protsenko@...aro.org>
Signed-off-by: Tudor Ambarus <tudor.ambarus@...aro.org>
---
drivers/spi/spi-s3c64xx.c | 18 +++++++++++++++++-
1 file changed, 17 insertions(+), 1 deletion(-)
diff --git a/drivers/spi/spi-s3c64xx.c b/drivers/spi/spi-s3c64xx.c
index 014fcc933c90..7ab3f3c2e9aa 100644
--- a/drivers/spi/spi-s3c64xx.c
+++ b/drivers/spi/spi-s3c64xx.c
@@ -17,7 +17,7 @@
#include <linux/platform_data/spi-s3c64xx.h>
-#define MAX_SPI_PORTS 12
+#define MAX_SPI_PORTS 16
#define S3C64XX_SPI_QUIRK_CS_AUTO (1 << 1)
#define AUTOSUSPEND_TIMEOUT 2000
@@ -1534,6 +1534,19 @@ static const struct s3c64xx_spi_port_config fsd_spi_port_config = {
.quirks = S3C64XX_SPI_QUIRK_CS_AUTO,
};
+static const struct s3c64xx_spi_port_config gs101_spi_port_config = {
+ .fifo_lvl_mask = { 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f,
+ 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f},
+ .rx_lvl_offset = 15,
+ .tx_st_done = 25,
+ .clk_div = 4,
+ .high_speed = true,
+ .clk_from_cmu = true,
+ .has_loopback = true,
+ .use_32bit_io = true,
+ .quirks = S3C64XX_SPI_QUIRK_CS_AUTO,
+};
+
static const struct platform_device_id s3c64xx_spi_driver_ids[] = {
{
.name = "s3c2443-spi",
@@ -1546,6 +1559,9 @@ static const struct platform_device_id s3c64xx_spi_driver_ids[] = {
};
static const struct of_device_id s3c64xx_spi_dt_match[] = {
+ { .compatible = "google,gs101-spi",
+ .data = &gs101_spi_port_config,
+ },
{ .compatible = "samsung,s3c2443-spi",
.data = (void *)&s3c2443_spi_port_config,
},
--
2.43.0.687.g38aa6559b0-goog
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