[PATCH 2/2] spi: sh-msiof: Fill in controller speed limits
flat view
STALE2109d
LANDED
From: Geert Uytterhoeven <geert+renesas@glider.be>
Date: 2021-01-13 10:20:44
Also in:
linux-renesas-soc, linux-spi
Subsystem:
spi subsystem, the rest · Maintainers:
Mark Brown, Linus Torvalds
Landed in mainline as 81f68479ec4e on 2021-01-13.
Fill in the controller speed limits, so the SPI core can use them for validating SPI transfers, and adjust or reject transfers when needed. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> --- drivers/spi/spi-sh-msiof.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/drivers/spi/spi-sh-msiof.c b/drivers/spi/spi-sh-msiof.c
index 90b8aba8a4fd9f32..41ed9ff8fad0d3b3 100644
--- a/drivers/spi/spi-sh-msiof.c
+++ b/drivers/spi/spi-sh-msiof.c@@ -1262,6 +1262,7 @@ static int sh_msiof_spi_probe(struct platform_device *pdev) const struct sh_msiof_chipdata *chipdata; struct sh_msiof_spi_info *info; struct sh_msiof_spi_priv *p; + unsigned long clksrc; int i; int ret;
@@ -1337,6 +1338,9 @@ static int sh_msiof_spi_probe(struct platform_device *pdev) /* init controller code */ ctlr->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH; ctlr->mode_bits |= SPI_LSB_FIRST | SPI_3WIRE; + clksrc = clk_get_rate(p->clk); + ctlr->min_speed_hz = DIV_ROUND_UP(clksrc, 1024); + ctlr->max_speed_hz = DIV_ROUND_UP(clksrc, 1 << p->min_div_pow); ctlr->flags = chipdata->ctlr_flags; ctlr->bus_num = pdev->id; ctlr->num_chipselect = p->info->num_chipselect;
--
2.25.1