diff options
| author | Geert Uytterhoeven <geert+renesas@glider.be> | 2021-01-13 11:19:15 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2021-01-13 13:19:08 +0100 |
| commit | 9a133f7b72f0b8d8896cbc7e4149c763b59168bb (patch) | |
| tree | 9d550af806630fde47ed491847426ee116bf4543 /drivers/spi/spi-sh-msiof.c | |
| parent | spi: rpc-if: Gaurd .pm assignment with CONFIG_PM_SLEEP #ifdef check (diff) | |
| download | linux-9a133f7b72f0b8d8896cbc7e4149c763b59168bb.tar.xz linux-9a133f7b72f0b8d8896cbc7e4149c763b59168bb.zip | |
spi: sh-msiof: Fill in spi_transfer.effective_speed_hz
Fill in the effective bit rate used for transfers, so the SPI core can
calculate instead of estimate delays.
Restore "reverse Christmas tree" order of local variables while adding
new variables.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20210113101916.1147695-2-geert+renesas@glider.be
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/spi/spi-sh-msiof.c')
| -rw-r--r-- | drivers/spi/spi-sh-msiof.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/drivers/spi/spi-sh-msiof.c b/drivers/spi/spi-sh-msiof.c index b2579af0e3eb..90b8aba8a4fd 100644 --- a/drivers/spi/spi-sh-msiof.c +++ b/drivers/spi/spi-sh-msiof.c @@ -259,11 +259,13 @@ static const u32 sh_msiof_spi_div_array[] = { }; static void sh_msiof_spi_set_clk_regs(struct sh_msiof_spi_priv *p, - unsigned long parent_rate, u32 spi_hz) + struct spi_transfer *t) { + unsigned long parent_rate = clk_get_rate(p->clk); + unsigned int div_pow = p->min_div_pow; + u32 spi_hz = t->speed_hz; unsigned long div; u32 brps, scr; - unsigned int div_pow = p->min_div_pow; if (!spi_hz || !parent_rate) { WARN(1, "Invalid clock rate parameters %lu and %u\n", @@ -292,6 +294,8 @@ static void sh_msiof_spi_set_clk_regs(struct sh_msiof_spi_priv *p, brps = 32; } + t->effective_speed_hz = parent_rate / (brps << div_pow); + scr = sh_msiof_spi_div_array[div_pow] | SISCR_BRPS(brps); sh_msiof_write(p, SITSCR, scr); if (!(p->ctlr->flags & SPI_CONTROLLER_MUST_TX)) @@ -923,7 +927,7 @@ static int sh_msiof_transfer_one(struct spi_controller *ctlr, /* setup clocks (clock already enabled in chipselect()) */ if (!spi_controller_is_slave(p->ctlr)) - sh_msiof_spi_set_clk_regs(p, clk_get_rate(p->clk), t->speed_hz); + sh_msiof_spi_set_clk_regs(p, t); while (ctlr->dma_tx && len > 15) { /* |