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Date: Sat, 11 Jun 2016 00:03:04 +0200 From: Alexandre Belloni <alexandre.belloni@...e-electrons.com> To: Nicolas Ferre <nicolas.ferre@...el.com> Cc: Boris Brezillon <boris.brezillon@...e-electrons.com>, Jean-Christophe Plagniol-Villard <plagnioj@...osoft.com>, linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, Cyrille Pitchen <cyrille.pitchen@...el.com>, Stephen Boyd <sboyd@...eaurora.org>, linux-clk@...r.kernel.org, Alexandre Belloni <alexandre.belloni@...e-electrons.com> Subject: [PATCH 01/48] clk: at91: replace usleep() by udelay() calls From: Cyrille Pitchen <cyrille.pitchen@...el.com> Fix the main and slow clock .prepare() implementations which used to call usleep() when the scheduler wasn't ready yet. Cc: Stephen Boyd <sboyd@...eaurora.org> Cc: linux-clk@...r.kernel.org Signed-off-by: Cyrille Pitchen <cyrille.pitchen@...el.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@...e-electrons.com> --- drivers/clk/at91/clk-main.c | 2 +- drivers/clk/at91/clk-slow.c | 6 +++--- 2 files changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/clk/at91/clk-main.c b/drivers/clk/at91/clk-main.c index 58b5baca670c..12c5062aeb92 100644 --- a/drivers/clk/at91/clk-main.c +++ b/drivers/clk/at91/clk-main.c @@ -342,7 +342,7 @@ static int clk_main_probe_frequency(struct regmap *regmap) regmap_read(regmap, AT91_CKGR_MCFR, &mcfr); if (mcfr & AT91_PMC_MAINRDY) return 0; - usleep_range(MAINF_LOOP_MIN_WAIT, MAINF_LOOP_MAX_WAIT); + udelay(MAINF_LOOP_MIN_WAIT); } while (time_before(prep_time, timeout)); return -ETIMEDOUT; diff --git a/drivers/clk/at91/clk-slow.c b/drivers/clk/at91/clk-slow.c index 61090b1146cf..612e893ce994 100644 --- a/drivers/clk/at91/clk-slow.c +++ b/drivers/clk/at91/clk-slow.c @@ -76,7 +76,7 @@ static int clk_slow_osc_prepare(struct clk_hw *hw) writel(tmp | AT91_SCKC_OSC32EN, sckcr); - usleep_range(osc->startup_usec, osc->startup_usec + 1); + udelay(osc->startup_usec); return 0; } @@ -195,7 +195,7 @@ static int clk_slow_rc_osc_prepare(struct clk_hw *hw) writel(readl(sckcr) | AT91_SCKC_RCEN, sckcr); - usleep_range(osc->startup_usec, osc->startup_usec + 1); + udelay(osc->startup_usec); return 0; } @@ -304,7 +304,7 @@ static int clk_sam9x5_slow_set_parent(struct clk_hw *hw, u8 index) writel(tmp, sckcr); - usleep_range(SLOWCK_SW_TIME_USEC, SLOWCK_SW_TIME_USEC + 1); + udelay(SLOWCK_SW_TIME_USEC); return 0; } -- 2.8.1
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