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spi: stm32_qspi: add clk_get_rate() support

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Replace proprietary clock_get() by clk_get_rate()
The stm32_qspi is now "generic" and can be used
by other STM32 SoCs.

Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
Acked-by: Vikas MANOCHA <vikas.manocha@st.com>
This commit is contained in:
Patrice Chotard 2017-07-18 09:29:09 +02:00 committed by Tom Rini
parent 27265cee76
commit 541cd6e54e
1 changed files with 9 additions and 1 deletions
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10
drivers/spi/stm32_qspi.c
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@ -165,6 +165,7 @@ struct stm32_qspi_platdata {
struct stm32_qspi_priv {
struct stm32_qspi_regs *regs;
ulong clock_rate;
u32 max_hz;
u32 mode;
@ -471,6 +472,13 @@ static int stm32_qspi_probe(struct udevice *bus)
dev_err(bus, "failed to enable clock\n");
return ret;
}
priv->clock_rate = clk_get_rate(&clk);
if (priv->clock_rate < 0) {
clk_disable(&clk);
return priv->clock_rate;
}
#endif
setbits_le32(&priv->regs->cr, STM32_QSPI_CR_SSHIFT);
@ -536,7 +544,7 @@ static int stm32_qspi_set_speed(struct udevice *bus, uint speed)
if (speed > plat->max_hz)
speed = plat->max_hz;
u32 qspi_clk = clock_get(CLOCK_AHB);
u32 qspi_clk = priv->clock_rate;
u32 prescaler = 255;
if (speed > 0) {
prescaler = DIV_ROUND_UP(qspi_clk, speed) - 1;