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authorAndrey Smirnov <andrew.smirnov@gmail.com>2017-06-19 07:40:39 -0700
committerSascha Hauer <s.hauer@pengutronix.de>2017-06-21 08:33:28 +0200
commit285a05487a6bb9ef023163a62006524a17835e0a (patch)
treea973e285b9e2cce8f2d3bf69caf2025b7d8ebcc8
parentcbff8031b491bf61673966e12f632300a17da470 (diff)
downloadbarebox-285a05487a6bb9ef023163a62006524a17835e0a.tar.gz
i.MX: clk: Remove imx_clk_pllv3_locked()
Remove imx_clk_pllv3_locked() which was introduced for the sake of Vybrid platform. The same effect (waiting on 'locked' bit) can be achived with vanilla clk_pllv3_enable/disable, which make said function unnecessary. Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
-rw-r--r--drivers/clk/imx/clk-pllv3.c24
-rw-r--r--drivers/clk/imx/clk-vf610.c16
-rw-r--r--drivers/clk/imx/clk.h4
3 files changed, 14 insertions, 30 deletions
diff --git a/drivers/clk/imx/clk-pllv3.c b/drivers/clk/imx/clk-pllv3.c
index a14d36e..0e55a63 100644
--- a/drivers/clk/imx/clk-pllv3.c
+++ b/drivers/clk/imx/clk-pllv3.c
@@ -41,8 +41,6 @@ struct clk_pllv3 {
u32 div_mask;
u32 div_shift;
const char *parent;
- void __iomem *lock_reg;
- u32 lock_mask;
u32 ref_clock;
u32 power_bit;
};
@@ -354,9 +352,6 @@ static int clk_pllv3_sys_vf610_set_rate(struct clk *clk, unsigned long rate,
writel(mfn, pll->base + SYS_VF610_PLL_OFFSET + PLL_NUM_OFFSET);
writel(mfd, pll->base + SYS_VF610_PLL_OFFSET + PLL_DENOM_OFFSET);
- while (!(readl(pll->lock_reg) & pll->lock_mask))
- ;
-
return 0;
}
@@ -427,22 +422,3 @@ struct clk *imx_clk_pllv3(enum imx_pllv3_type type, const char *name,
return &pll->clk;
}
-
-struct clk *imx_clk_pllv3_locked(enum imx_pllv3_type type, const char *name,
- const char *parent, void __iomem *base,
- u32 div_mask, void __iomem *lock_reg, u32 lock_mask)
-{
- struct clk *clk;
- struct clk_pllv3 *pll;
-
- clk = imx_clk_pllv3(type, name, parent, base, div_mask);
- if (IS_ERR(clk))
- return clk;
-
- pll = to_clk_pllv3(clk);
-
- pll->lock_reg = lock_reg;
- pll->lock_mask = lock_mask;
-
- return clk;
-}
diff --git a/drivers/clk/imx/clk-vf610.c b/drivers/clk/imx/clk-vf610.c
index 5469840..49d66fb 100644
--- a/drivers/clk/imx/clk-vf610.c
+++ b/drivers/clk/imx/clk-vf610.c
@@ -192,8 +192,8 @@ static void __init vf610_clocks_init(struct device_node *ccm_node)
clk[VF610_CLK_PLL6_BYPASS_SRC] = imx_clk_mux("pll6_bypass_src", PLL6_CTRL, 14, 1, pll_bypass_src_sels, ARRAY_SIZE(pll_bypass_src_sels));
clk[VF610_CLK_PLL7_BYPASS_SRC] = imx_clk_mux("pll7_bypass_src", PLL7_CTRL, 14, 1, pll_bypass_src_sels, ARRAY_SIZE(pll_bypass_src_sels));
- clk[VF610_CLK_PLL1] = imx_clk_pllv3_locked(IMX_PLLV3_SYS_VF610, "pll1", "pll1_bypass_src", PLL1_CTRL, 0x1, PLL_LOCK, BIT(6));
- clk[VF610_CLK_PLL2] = imx_clk_pllv3_locked(IMX_PLLV3_SYS_VF610, "pll2", "pll2_bypass_src", PLL2_CTRL, 0x1, PLL_LOCK, BIT(5));
+ clk[VF610_CLK_PLL1] = imx_clk_pllv3(IMX_PLLV3_SYS_VF610, "pll1", "pll1_bypass_src", PLL1_CTRL, 0x1);
+ clk[VF610_CLK_PLL2] = imx_clk_pllv3(IMX_PLLV3_SYS_VF610, "pll2", "pll2_bypass_src", PLL2_CTRL, 0x1);
clk[VF610_CLK_PLL3] = imx_clk_pllv3(IMX_PLLV3_USB_VF610, "pll3", "pll3_bypass_src", PLL3_CTRL, 0x2);
clk[VF610_CLK_PLL4] = imx_clk_pllv3(IMX_PLLV3_AV, "pll4", "pll4_bypass_src", PLL4_CTRL, 0x7f);
@@ -478,6 +478,18 @@ static int vf610_switch_cpu_clock_to_500mhz(void)
return -EINVAL;
}
+ /*
+ * Code below alters the frequency of PLL1, and doing so would
+ * require us to wait for PLL1 lock before proceeding to
+ * select it as a clock source again.
+ *
+ * We achive this by relying on PLL1 being disabled implicitly
+ * by selecting different source for "sys_sel", and then
+ * consecutively enabled (which would result in busy waiting
+ * on 'lock' bit) as a part of setting "pll1_pfd_sel" as a
+ * source for "sys_sel".
+ *
+ */
ret = clk_set_parent(clk[VF610_CLK_SYS_SEL], clk[VF610_CLK_PLL2_BUS]);
if (ret < 0) {
pr_crit("Unable to re-parent '%s'\n",
diff --git a/drivers/clk/imx/clk.h b/drivers/clk/imx/clk.h
index 8da8064..c46c261 100644
--- a/drivers/clk/imx/clk.h
+++ b/drivers/clk/imx/clk.h
@@ -126,10 +126,6 @@ struct clk *imx_clk_pllv3(enum imx_pllv3_type type, const char *name,
const char *parent, void __iomem *base,
u32 div_mask);
-struct clk *imx_clk_pllv3_locked(enum imx_pllv3_type type, const char *name,
- const char *parent, void __iomem *base,
- u32 div_mask, void __iomem *lock_reg, u32 lock_mask);
-
struct clk *imx_clk_pfd(const char *name, const char *parent,
void __iomem *reg, u8 idx);