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ARM: imx6q: remove board specific CLKO setup

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The CLKO is widely used by imx6q board designs to clock audio codec.
Since most codecs accept 24 MHz frequency, let's initially set up CLKO
with OSC24M (cko <-- cko2 <-- osc).  Then those board specific CLKO
setup for audio codec can be removed.

The board dts files also need an update on cko reference in codec node.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
This commit is contained in:
Shawn Guo 2013-07-18 14:42:28 +08:00
parent 5da826abe9
commit a94f8ecb2f
5 changed files with 14 additions and 72 deletions
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2
arch/arm/boot/dts/imx6q-sabrelite.dts
View File

@ -167,7 +167,7 @@
codec: sgtl5000@0a {
compatible = "fsl,sgtl5000";
reg = <0x0a>;
clocks = <&clks 169>;
clocks = <&clks 201>;
VDDA-supply = <&reg_2p5v>;
VDDIO-supply = <&reg_3p3v>;
};

2
arch/arm/boot/dts/imx6qdl-sabresd.dtsi
View File

@ -109,7 +109,7 @@
codec: wm8962@1a {
compatible = "wlf,wm8962";
reg = <0x1a>;
clocks = <&clks 169>;
clocks = <&clks 201>;
DCVDD-supply = <&reg_audio>;
DBVDD-supply = <&reg_audio>;
AVDD-supply = <&reg_audio>;

2
arch/arm/boot/dts/imx6qdl-wandboard.dtsi
View File

@ -60,7 +60,7 @@
codec: sgtl5000@0a {
compatible = "fsl,sgtl5000";
reg = <0x0a>;
clocks = <&clks 169>;
clocks = <&clks 201>;
VDDA-supply = <&reg_2p5v>;
VDDIO-supply = <&reg_3p3v>;
};

11
arch/arm/mach-imx/clk-imx6q.c
View File

@ -288,6 +288,7 @@ static void __init imx6q_clocks_init(struct device_node *ccm_node)
struct device_node *np;
void __iomem *base;
int i, irq;
int ret;
clk[dummy] = imx_clk_fixed("dummy", 0);
clk[ckil] = imx_obtain_fixed_clock("ckil", 0);
@ -592,6 +593,16 @@ static void __init imx6q_clocks_init(struct device_node *ccm_node)
clk_prepare_enable(clk[usbphy2_gate]);
}
/*
* Let's initially set up CLKO with OSC24M, since this configuration
* is widely used by imx6q board designs to clock audio codec.
*/
ret = clk_set_parent(clk[cko2_sel], clk[osc]);
if (!ret)
ret = clk_set_parent(clk[cko], clk[cko2]);
if (ret)
pr_warn("failed to set up CLKO: %d\n", ret);
/* Set initial power mode */
imx6q_set_lpm(WAIT_CLOCKED);

69
arch/arm/mach-imx/mach-imx6q.c
View File

@ -162,30 +162,6 @@ static int ar8031_phy_fixup(struct phy_device *dev)
return 0;
}
static void __init imx6q_sabrelite_cko1_setup(void)
{
struct clk *cko1_sel, *ahb, *cko1;
unsigned long rate;
cko1_sel = clk_get_sys(NULL, "cko1_sel");
ahb = clk_get_sys(NULL, "ahb");
cko1 = clk_get_sys(NULL, "cko1");
if (IS_ERR(cko1_sel) || IS_ERR(ahb) || IS_ERR(cko1)) {
pr_err("cko1 setup failed!\n");
goto put_clk;
}
clk_set_parent(cko1_sel, ahb);
rate = clk_round_rate(cko1, 16000000);
clk_set_rate(cko1, rate);
put_clk:
if (!IS_ERR(cko1_sel))
clk_put(cko1_sel);
if (!IS_ERR(ahb))
clk_put(ahb);
if (!IS_ERR(cko1))
clk_put(cko1);
}
#define PHY_ID_AR8031 0x004dd074
static void __init imx6q_enet_phy_init(void)
@ -200,45 +176,6 @@ static void __init imx6q_enet_phy_init(void)
}
}
static void __init imx6q_sabresd_cko1_setup(void)
{
struct clk *cko1_sel, *pll4, *pll4_post, *cko1;
unsigned long rate;
cko1_sel = clk_get_sys(NULL, "cko1_sel");
pll4 = clk_get_sys(NULL, "pll4_audio");
pll4_post = clk_get_sys(NULL, "pll4_post_div");
cko1 = clk_get_sys(NULL, "cko1");
if (IS_ERR(cko1_sel) || IS_ERR(pll4)
|| IS_ERR(pll4_post) || IS_ERR(cko1)) {
pr_err("cko1 setup failed!\n");
goto put_clk;
}
/*
* Setting pll4 at 768MHz (24MHz * 32)
* So its child clock can get 24MHz easily
*/
clk_set_rate(pll4, 768000000);
clk_set_parent(cko1_sel, pll4_post);
rate = clk_round_rate(cko1, 24000000);
clk_set_rate(cko1, rate);
put_clk:
if (!IS_ERR(cko1_sel))
clk_put(cko1_sel);
if (!IS_ERR(pll4_post))
clk_put(pll4_post);
if (!IS_ERR(pll4))
clk_put(pll4);
if (!IS_ERR(cko1))
clk_put(cko1);
}
static void __init imx6q_sabresd_init(void)
{
imx6q_sabresd_cko1_setup();
}
static void __init imx6q_1588_init(void)
{
struct regmap *gpr;
@ -255,12 +192,6 @@ static void __init imx6q_1588_init(void)
static void __init imx6q_init_machine(void)
{
if (of_machine_is_compatible("fsl,imx6q-sabrelite"))
imx6q_sabrelite_cko1_setup();
else if (of_machine_is_compatible("fsl,imx6q-sabresd") ||
of_machine_is_compatible("fsl,imx6dl-sabresd"))
imx6q_sabresd_init();
imx6q_enet_phy_init();
of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);