Thread (64 messages) 64 messages, 4 authors, 2016-06-03

[PATCH 12/16] clk: sunxi-ng: Add N-M-factor clock support

From: Maxime Ripard <hidden>
Date: 2016-05-15 19:04:15
Also in: linux-clk

Hi,

On Mon, May 09, 2016 at 09:24:21AM +0200, Jean-Francois Moine wrote:
On Sun,  8 May 2016 22:01:47 +0200
Maxime Ripard [off-list ref] wrote:
quoted
Introduce support for clocks that multiply and divide using linear factors.

Signed-off-by: Maxime Ripard <redacted>
---
 drivers/clk/sunxi-ng/Makefile |   1 +
 drivers/clk/sunxi-ng/ccu_nm.c | 103 ++++++++++++++++++++++++++++++++++++++++++
 drivers/clk/sunxi-ng/ccu_nm.h |  41 +++++++++++++++++
 3 files changed, 145 insertions(+)
 create mode 100644 drivers/clk/sunxi-ng/ccu_nm.c
 create mode 100644 drivers/clk/sunxi-ng/ccu_nm.h
	[snip]
quoted
diff --git a/drivers/clk/sunxi-ng/ccu_nm.c b/drivers/clk/sunxi-ng/ccu_nm.c
new file mode 100644
index 000000000000..268637db137b
--- /dev/null
+++ b/drivers/clk/sunxi-ng/ccu_nm.c
@@ -0,0 +1,103 @@
	[snip]
quoted
+static long ccu_nm_round_rate(struct clk_hw *hw, unsigned long rate,
+			      unsigned long *parent_rate)
+{
+	struct ccu_nm *nm = hw_to_ccu_nm(hw);
+	unsigned long n, m;
+
+	rational_best_approximation(rate, *parent_rate,
+				    nm->n.width, nm->m.width, &n, &m);
Should be
			1 << nm->n.width, 1 << nm->m.width, &n, &m);
quoted
+
+	return *parent_rate * n / m;
+}
+
+static int ccu_nm_set_rate(struct clk_hw *hw, unsigned long rate,
+			   unsigned long parent_rate)
+{
+	struct ccu_nm *nm = hw_to_ccu_nm(hw);
+	unsigned long flags;
+	unsigned long n, m;
+	u32 reg;
+
+	rational_best_approximation(rate, parent_rate,
+				    nm->n.width, nm->m.width, &n, &m);
Idem
Indeed, fixed.

Thanks!
Maxime

-- 
Maxime Ripard, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com
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