mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-24 15:56:49 +00:00
53c474abbd
This target aims to replace ar71xx mid-term. The big part that is still missing is making the MMIO/AHB wifi work using OF. NAND and mikrotik subtargets will follow. Signed-off-by: John Crispin <john@phrozen.org>
226 lines
6.4 KiB
Diff
226 lines
6.4 KiB
Diff
From: Felix Fietkau <nbd@nbd.name>
|
|
Date: Tue, 6 Mar 2018 13:24:07 +0100
|
|
Subject: [PATCH] MIPS: ath79: make specifying the reference clock in DT
|
|
optional
|
|
|
|
It can be autodetected for many SoCs using the strapping options.
|
|
If the clock is specified in DT, the autodetected value is ignored
|
|
|
|
Signed-off-by: Felix Fietkau <nbd@nbd.name>
|
|
---
|
|
|
|
--- a/arch/mips/ath79/clock.c
|
|
+++ b/arch/mips/ath79/clock.c
|
|
@@ -79,6 +79,18 @@ static struct clk * __init ath79_set_ff_
|
|
return clk;
|
|
}
|
|
|
|
+static unsigned long __init ath79_setup_ref_clk(unsigned long rate)
|
|
+{
|
|
+ struct clk *clk = clks[ATH79_CLK_REF];
|
|
+
|
|
+ if (clk)
|
|
+ rate = clk_get_rate(clk);
|
|
+ else
|
|
+ clk = ath79_set_clk(ATH79_CLK_REF, rate);
|
|
+
|
|
+ return rate;
|
|
+}
|
|
+
|
|
static void __init ar71xx_clocks_init(void __iomem *pll_base)
|
|
{
|
|
unsigned long ref_rate;
|
|
@@ -89,7 +101,7 @@ static void __init ar71xx_clocks_init(vo
|
|
u32 freq;
|
|
u32 div;
|
|
|
|
- ref_rate = AR71XX_BASE_FREQ;
|
|
+ ref_rate = ath79_setup_ref_clk(AR71XX_BASE_FREQ);
|
|
|
|
pll = __raw_readl(pll_base + AR71XX_PLL_REG_CPU_CONFIG);
|
|
|
|
@@ -105,16 +117,17 @@ static void __init ar71xx_clocks_init(vo
|
|
div = (((pll >> AR71XX_AHB_DIV_SHIFT) & AR71XX_AHB_DIV_MASK) + 1) * 2;
|
|
ahb_rate = cpu_rate / div;
|
|
|
|
- ath79_set_clk(ATH79_CLK_REF, ref_rate);
|
|
ath79_set_clk(ATH79_CLK_CPU, cpu_rate);
|
|
ath79_set_clk(ATH79_CLK_DDR, ddr_rate);
|
|
ath79_set_clk(ATH79_CLK_AHB, ahb_rate);
|
|
}
|
|
|
|
-static void __init ar724x_clk_init(struct clk *ref_clk, void __iomem *pll_base)
|
|
+static void __init ar724x_clocks_init(void __iomem *pll_base)
|
|
{
|
|
- u32 pll;
|
|
u32 mult, div, ddr_div, ahb_div;
|
|
+ u32 pll;
|
|
+
|
|
+ ath79_setup_ref_clk(AR71XX_BASE_FREQ);
|
|
|
|
pll = __raw_readl(pll_base + AR724X_PLL_REG_CPU_CONFIG);
|
|
|
|
@@ -129,17 +142,9 @@ static void __init ar724x_clk_init(struc
|
|
ath79_set_ff_clk(ATH79_CLK_AHB, "ref", mult, div * ahb_div);
|
|
}
|
|
|
|
-static void __init ar724x_clocks_init(void __iomem *pll_base)
|
|
-{
|
|
- struct clk *ref_clk;
|
|
-
|
|
- ref_clk = ath79_set_clk(ATH79_CLK_REF, AR724X_BASE_FREQ);
|
|
-
|
|
- ar724x_clk_init(ref_clk, pll_base);
|
|
-}
|
|
-
|
|
-static void __init ar9330_clk_init(struct clk *ref_clk, void __iomem *pll_base)
|
|
+static void __init ar933x_clocks_init(void __iomem *pll_base)
|
|
{
|
|
+ unsigned long ref_rate;
|
|
u32 clock_ctrl;
|
|
u32 ref_div;
|
|
u32 ninit_mul;
|
|
@@ -148,6 +153,15 @@ static void __init ar9330_clk_init(struc
|
|
u32 cpu_div;
|
|
u32 ddr_div;
|
|
u32 ahb_div;
|
|
+ u32 t;
|
|
+
|
|
+ t = ath79_reset_rr(AR933X_RESET_REG_BOOTSTRAP);
|
|
+ if (t & AR933X_BOOTSTRAP_REF_CLK_40)
|
|
+ ref_rate = (40 * 1000 * 1000);
|
|
+ else
|
|
+ ref_rate = (25 * 1000 * 1000);
|
|
+
|
|
+ ath79_setup_ref_clk(ref_rate);
|
|
|
|
clock_ctrl = __raw_readl(pll_base + AR933X_PLL_CLOCK_CTRL_REG);
|
|
if (clock_ctrl & AR933X_PLL_CLOCK_CTRL_BYPASS) {
|
|
@@ -196,23 +210,6 @@ static void __init ar9330_clk_init(struc
|
|
ref_div * out_div * ahb_div);
|
|
}
|
|
|
|
-static void __init ar933x_clocks_init(void __iomem *pll_base)
|
|
-{
|
|
- struct clk *ref_clk;
|
|
- unsigned long ref_rate;
|
|
- u32 t;
|
|
-
|
|
- t = ath79_reset_rr(AR933X_RESET_REG_BOOTSTRAP);
|
|
- if (t & AR933X_BOOTSTRAP_REF_CLK_40)
|
|
- ref_rate = (40 * 1000 * 1000);
|
|
- else
|
|
- ref_rate = (25 * 1000 * 1000);
|
|
-
|
|
- ref_clk = ath79_set_clk(ATH79_CLK_REF, ref_rate);
|
|
-
|
|
- ar9330_clk_init(ref_clk, ath79_pll_base);
|
|
-}
|
|
-
|
|
static u32 __init ar934x_get_pll_freq(u32 ref, u32 ref_div, u32 nint, u32 nfrac,
|
|
u32 frac, u32 out_div)
|
|
{
|
|
@@ -252,6 +249,8 @@ static void __init ar934x_clocks_init(vo
|
|
else
|
|
ref_rate = 25 * 1000 * 1000;
|
|
|
|
+ ref_rate = ath79_setup_ref_clk(ref_rate);
|
|
+
|
|
pll = __raw_readl(dpll_base + AR934X_SRIF_CPU_DPLL2_REG);
|
|
if (pll & AR934X_SRIF_DPLL2_LOCAL_PLL) {
|
|
out_div = (pll >> AR934X_SRIF_DPLL2_OUTDIV_SHIFT) &
|
|
@@ -338,7 +337,6 @@ static void __init ar934x_clocks_init(vo
|
|
else
|
|
ahb_rate = cpu_pll / (postdiv + 1);
|
|
|
|
- ath79_set_clk(ATH79_CLK_REF, ref_rate);
|
|
ath79_set_clk(ATH79_CLK_CPU, cpu_rate);
|
|
ath79_set_clk(ATH79_CLK_DDR, ddr_rate);
|
|
ath79_set_clk(ATH79_CLK_AHB, ahb_rate);
|
|
@@ -362,6 +360,8 @@ static void __init qca953x_clocks_init(v
|
|
else
|
|
ref_rate = 25 * 1000 * 1000;
|
|
|
|
+ ref_rate = ath79_setup_ref_clk(ref_rate);
|
|
+
|
|
pll = __raw_readl(pll_base + QCA953X_PLL_CPU_CONFIG_REG);
|
|
out_div = (pll >> QCA953X_PLL_CPU_CONFIG_OUTDIV_SHIFT) &
|
|
QCA953X_PLL_CPU_CONFIG_OUTDIV_MASK;
|
|
@@ -422,7 +422,6 @@ static void __init qca953x_clocks_init(v
|
|
else
|
|
ahb_rate = cpu_pll / (postdiv + 1);
|
|
|
|
- ath79_set_clk(ATH79_CLK_REF, ref_rate);
|
|
ath79_set_clk(ATH79_CLK_CPU, cpu_rate);
|
|
ath79_set_clk(ATH79_CLK_DDR, ddr_rate);
|
|
ath79_set_clk(ATH79_CLK_AHB, ahb_rate);
|
|
@@ -444,6 +443,8 @@ static void __init qca955x_clocks_init(v
|
|
else
|
|
ref_rate = 25 * 1000 * 1000;
|
|
|
|
+ ref_rate = ath79_setup_ref_clk(ref_rate);
|
|
+
|
|
pll = __raw_readl(pll_base + QCA955X_PLL_CPU_CONFIG_REG);
|
|
out_div = (pll >> QCA955X_PLL_CPU_CONFIG_OUTDIV_SHIFT) &
|
|
QCA955X_PLL_CPU_CONFIG_OUTDIV_MASK;
|
|
@@ -504,7 +505,6 @@ static void __init qca955x_clocks_init(v
|
|
else
|
|
ahb_rate = cpu_pll / (postdiv + 1);
|
|
|
|
- ath79_set_clk(ATH79_CLK_REF, ref_rate);
|
|
ath79_set_clk(ATH79_CLK_CPU, cpu_rate);
|
|
ath79_set_clk(ATH79_CLK_DDR, ddr_rate);
|
|
ath79_set_clk(ATH79_CLK_AHB, ahb_rate);
|
|
@@ -526,6 +526,8 @@ static void __init qca956x_clocks_init(v
|
|
else
|
|
ref_rate = 25 * 1000 * 1000;
|
|
|
|
+ ref_rate = ath79_setup_ref_clk(ref_rate);
|
|
+
|
|
pll = __raw_readl(pll_base + QCA956X_PLL_CPU_CONFIG_REG);
|
|
out_div = (pll >> QCA956X_PLL_CPU_CONFIG_OUTDIV_SHIFT) &
|
|
QCA956X_PLL_CPU_CONFIG_OUTDIV_MASK;
|
|
@@ -595,7 +597,6 @@ static void __init qca956x_clocks_init(v
|
|
else
|
|
ahb_rate = cpu_pll / (postdiv + 1);
|
|
|
|
- ath79_set_clk(ATH79_CLK_REF, ref_rate);
|
|
ath79_set_clk(ATH79_CLK_CPU, cpu_rate);
|
|
ath79_set_clk(ATH79_CLK_DDR, ddr_rate);
|
|
ath79_set_clk(ATH79_CLK_AHB, ahb_rate);
|
|
@@ -671,10 +672,8 @@ static void __init ath79_clocks_init_dt_
|
|
void __iomem *pll_base;
|
|
|
|
ref_clk = of_clk_get(np, 0);
|
|
- if (IS_ERR(ref_clk)) {
|
|
- pr_err("%pOF: of_clk_get failed\n", np);
|
|
- goto err;
|
|
- }
|
|
+ if (!IS_ERR(ref_clk))
|
|
+ clks[ATH79_CLK_REF] = ref_clk;
|
|
|
|
pll_base = of_iomap(np, 0);
|
|
if (!pll_base) {
|
|
@@ -683,9 +682,9 @@ static void __init ath79_clocks_init_dt_
|
|
}
|
|
|
|
if (of_device_is_compatible(np, "qca,ar9130-pll"))
|
|
- ar724x_clk_init(ref_clk, pll_base);
|
|
+ ar724x_clocks_init(pll_base);
|
|
else if (of_device_is_compatible(np, "qca,ar9330-pll"))
|
|
- ar9330_clk_init(ref_clk, pll_base);
|
|
+ ar933x_clocks_init(pll_base);
|
|
else {
|
|
pr_err("%pOF: could not find any appropriate clk_init()\n", np);
|
|
goto err_iounmap;
|
|
@@ -703,9 +702,6 @@ err_iounmap:
|
|
|
|
err_clk:
|
|
clk_put(ref_clk);
|
|
-
|
|
-err:
|
|
- return;
|
|
}
|
|
CLK_OF_DECLARE(ar9130_clk, "qca,ar9130-pll", ath79_clocks_init_dt_ng);
|
|
CLK_OF_DECLARE(ar9330_clk, "qca,ar9330-pll", ath79_clocks_init_dt_ng);
|