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Subject[PATCH 2/2] clk: cs2000: add AUX_OUT pin select support
Date

From: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Tested-by: Hiroyuki Yokoyama <hiroyuki.yokoyama.vx@renesas.com>
---
.../devicetree/bindings/clock/cs2000-cp.txt | 9 +++
drivers/clk/clk-cs2000-cp.c | 73 +++++++++++++++++++++-
2 files changed, 80 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/clock/cs2000-cp.txt b/Documentation/devicetree/bindings/clock/cs2000-cp.txt
index 54e6df0..4c2f9cb 100644
--- a/Documentation/devicetree/bindings/clock/cs2000-cp.txt
+++ b/Documentation/devicetree/bindings/clock/cs2000-cp.txt
@@ -8,6 +8,15 @@ Required properties:
- clock-names: CLK_IN : clk_in, XTI/REF_CLK : ref_clk
- #clock-cells: must be <0>

+Option properties:
+
+- auxoutsrc: select AUX_OUT source from these.
+ refclk: Timing Reference Clock
+ clk_in: Frequency Reference Clock
+ pllclkout: PLL Clock Output
+ push-pull: PLL Lock/Unlock Indication
+ open-drain: PLL Lock/Unlock Indication
+
Example:

&i2c2 {
diff --git a/drivers/clk/clk-cs2000-cp.c b/drivers/clk/clk-cs2000-cp.c
index 4df38c5..234e3b4 100644
--- a/drivers/clk/clk-cs2000-cp.c
+++ b/drivers/clk/clk-cs2000-cp.c
@@ -42,6 +42,8 @@
/* DEVICE_CFG1 */
#define RSEL(x) (((x) & 0x3) << 3)
#define RSEL_MASK RSEL(0x3)
+#define AUXOUTSRC(x) (((x) & 0x3) << 1)
+#define AUXOUTSRC_MASK AUXOUTSRC(0x3)
#define ENDEV1 (0x1)

/* DEVICE_CFG2 */
@@ -54,6 +56,8 @@
#define ENDEV2 (0x1)

/* FUNC_CFG1 */
+#define AUXLOCKCFG(x) (((x) & 0x1) << 6)
+#define AUXLOCKCFG_MASK AUXLOCKCFG(1)
#define REFCLKDIV(x) (((x) & 0x3) << 3)
#define REFCLKDIV_MASK REFCLKDIV(0x3)

@@ -66,11 +70,20 @@
#define REF_CLK 1
#define CLK_MAX 2

+enum auxoutsrc {
+ AUXSRC_REFCLK = 0,
+ AUXSRC_CLKIN,
+ AUXSRC_PLLCLKOUT,
+ AUXSRC_PUSHPULL,
+ AUXSRC_OPENDRAIN,
+};
+
struct cs2000_priv {
struct clk_hw hw;
struct i2c_client *client;
struct clk *clk_in;
struct clk *ref_clk;
+ enum auxoutsrc auxoutsrc;

/* suspend/resume */
unsigned long saved_rate;
@@ -111,9 +124,27 @@ static int cs2000_bset(struct cs2000_priv *priv, u8 addr, u8 mask, u8 val)
static int cs2000_enable_dev_config(struct cs2000_priv *priv, bool enable)
{
int ret;
+ u8 dcfg1, fcfg1;
+
+ dcfg1 = 0;
+ fcfg1 = 0;
+ if (enable)
+ dcfg1 |= ENDEV1;
+ switch (priv->auxoutsrc) {
+ case AUXSRC_REFCLK:
+ case AUXSRC_CLKIN:
+ case AUXSRC_PLLCLKOUT:
+ dcfg1 |= AUXOUTSRC(priv->auxoutsrc);
+ break;
+ case AUXSRC_OPENDRAIN:
+ fcfg1 |= AUXLOCKCFG(1);
+ /* fall though */
+ case AUXSRC_PUSHPULL:
+ dcfg1 |= AUXOUTSRC(3);
+ break;
+ }

- ret = cs2000_bset(priv, DEVICE_CFG1, ENDEV1,
- enable ? ENDEV1 : 0);
+ ret = cs2000_bset(priv, DEVICE_CFG1, (AUXOUTSRC_MASK | ENDEV1), dcfg1);
if (ret < 0)
return ret;

@@ -122,6 +153,10 @@ static int cs2000_enable_dev_config(struct cs2000_priv *priv, bool enable)
if (ret < 0)
return ret;

+ ret = cs2000_bset(priv, FUNC_CFG1, AUXLOCKCFG_MASK, fcfg1);
+ if (ret < 0)
+ return ret;
+
return 0;
}

@@ -479,6 +514,38 @@ static int cs2000_remove(struct i2c_client *client)
return 0;
}

+static void cs2000_of_parse(struct cs2000_priv *priv)
+{
+ struct device *dev = priv_to_dev(priv);
+ struct device_node *np = dev->of_node;
+ const char *auxoutsrc;
+
+ auxoutsrc = of_get_property(np, "auxoutsrc", NULL);
+
+ if (auxoutsrc) {
+ int i;
+ struct {
+ char *name;
+ enum auxoutsrc val;
+ } of_table[] = {
+ {"refclk", AUXSRC_REFCLK},
+ {"clk_in", AUXSRC_CLKIN},
+ {"pllclkout", AUXSRC_PLLCLKOUT},
+ {"push-pull", AUXSRC_PUSHPULL},
+ {"open-drain", AUXSRC_OPENDRAIN},
+ };
+
+ for (i = 0; i < ARRAY_SIZE(of_table); i++) {
+ if (strcmp(of_table[i].name, auxoutsrc) == 0) {
+ priv->auxoutsrc = of_table[i].val;
+ dev_dbg(dev, "%s was selected\n",
+ of_table[i].name);
+ break;
+ }
+ }
+ }
+}
+
static int cs2000_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
@@ -493,6 +560,8 @@ static int cs2000_probe(struct i2c_client *client,
priv->client = client;
i2c_set_clientdata(client, priv);

+ cs2000_of_parse(priv);
+
ret = cs2000_clk_get(priv);
if (ret < 0)
return ret;
--
1.9.1
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