| Message ID | 1467032594-7643-1-git-send-email-andi.shyti@samsung.com (mailing list archive) |
|---|---|
| State | Not Applicable |
| Headers | show |
Hi, On Mon, Jun 27, 2016 at 10:03:13PM +0900, Andi Shyti wrote: > The CLK_IGNORE_UNUSED flag has to be avoided whenever possible. > Use the CLK_IS_CRITICAL flag instead, which enables the clock line > during boot time. > > While none of the SCLK_SPI need to be alive all the time as that > clock is handled by the SPI driver as a busclk whenever needed. > > Suggested-by: Tomasz Figa <tomasz.figa@gmail.com> > Signed-off-by: Andi Shyti <andi.shyti@samsung.com> > --- sorry for spamming, please ignore this patch, some more testing has shown that if the SCLK_SPI1 is not kept alive, the device not always works. Thanks and sorry again, Andi -- To unsubscribe from this list: send the line "unsubscribe linux-clk" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/clk/samsung/clk-exynos5433.c b/drivers/clk/samsung/clk-exynos5433.c index 128527b..dcb4391 100644 --- a/drivers/clk/samsung/clk-exynos5433.c +++ b/drivers/clk/samsung/clk-exynos5433.c @@ -1655,7 +1655,7 @@ static struct samsung_gate_clock peric_gate_clks[] __initdata = { ENABLE_SCLK_PERIC, 13, CLK_SET_RATE_PARENT, 0), GATE(CLK_SCLK_IOCLK_SPI1, "sclk_ioclk_spi1", "ioclk_spi1_clk_in", ENABLE_SCLK_PERIC, 12, - CLK_IGNORE_UNUSED | CLK_SET_RATE_PARENT, 0), + CLK_IS_CRITICAL | CLK_SET_RATE_PARENT, 0), GATE(CLK_SCLK_IOCLK_SPI0, "sclk_ioclk_spi0", "ioclk_spi0_clk_in", ENABLE_SCLK_PERIC, 11, CLK_SET_RATE_PARENT, 0), GATE(CLK_SCLK_IOCLK_I2S1_BCLK, "sclk_ioclk_i2s1_bclk", @@ -1670,7 +1670,7 @@ static struct samsung_gate_clock peric_gate_clks[] __initdata = { GATE(CLK_SCLK_SPI2, "sclk_spi2", "sclk_spi2_peric", ENABLE_SCLK_PERIC, 5, CLK_SET_RATE_PARENT, 0), GATE(CLK_SCLK_SPI1, "sclk_spi1", "sclk_spi1_peric", ENABLE_SCLK_PERIC, - 4, CLK_IGNORE_UNUSED | CLK_SET_RATE_PARENT, 0), + 4, CLK_SET_RATE_PARENT, 0), GATE(CLK_SCLK_SPI0, "sclk_spi0", "sclk_spi0_peric", ENABLE_SCLK_PERIC, 3, CLK_SET_RATE_PARENT, 0), GATE(CLK_SCLK_UART2, "sclk_uart2", "sclk_uart2_peric",
The CLK_IGNORE_UNUSED flag has to be avoided whenever possible. Use the CLK_IS_CRITICAL flag instead, which enables the clock line during boot time. While none of the SCLK_SPI need to be alive all the time as that clock is handled by the SPI driver as a busclk whenever needed. Suggested-by: Tomasz Figa <tomasz.figa@gmail.com> Signed-off-by: Andi Shyti <andi.shyti@samsung.com> --- Hi, this patch comes after Tomasz's review where he discouraged from using the CLK_IGNORE_UNUSED flag. Therefore I added one more patch to the original where I remove that flag for the SPI1 whenever not necessary while I replace it with the CLK_IS_CRITICAL for the ioclk. This patch makes this driver the first using the "critical" functionality :) Andi drivers/clk/samsung/clk-exynos5433.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)