[PATCH] ARM: S3C24XX: Add .get_rate callback for "camif-upll" clock
From: sylvester.nawrocki@gmail.com (Sylwester Nawrocki)
Date: 2012-08-27 20:12:09
Also in:
linux-samsung-soc
Subsystem:
arm port, the rest · Maintainers:
Russell King, Linus Torvalds
Add missing get_rate callback for the "camif-upll" clock, so frequency of this clock is properly reported with clk_get_rate(). Signed-off-by: Sylwester Nawrocki <sylvester.nawrocki@gmail.com> --- arch/arm/mach-s3c24xx/clock-s3c2440.c | 14 ++++++++++++++ 1 files changed, 14 insertions(+), 0 deletions(-)
diff --git a/arch/arm/mach-s3c24xx/clock-s3c2440.c b/arch/arm/mach-s3c24xx/clock-s3c2440.c
index cb2883d..749220f 100644
--- a/arch/arm/mach-s3c24xx/clock-s3c2440.c
+++ b/arch/arm/mach-s3c24xx/clock-s3c2440.c@@ -87,6 +87,19 @@ static int s3c2440_camif_upll_setrate(struct clk *clk, unsigned long rate) return 0; } +static unsigned long s3c2440_camif_upll_getrate(struct clk *clk) +{ + unsigned long parent_rate = clk_get_rate(clk->parent); + unsigned long camdivn = __raw_readl(S3C2440_CAMDIVN); + + if (!(camdivn & S3C2440_CAMDIVN_CAMCLK_SEL)) + return parent_rate; + + camdivn &= S3C2440_CAMDIVN_CAMCLK_MASK; + + return parent_rate / (camdivn + 1) / 2; +} + /* Extra S3C2440 clocks */ static struct clk s3c2440_clk_cam = {
@@ -99,6 +112,7 @@ static struct clk s3c2440_clk_cam_upll = { .name = "camif-upll", .ops = &(struct clk_ops) { .set_rate = s3c2440_camif_upll_setrate, + .get_rate = s3c2440_camif_upll_getrate, .round_rate = s3c2440_camif_upll_round, }, }; --
1.7.4.1