+++ /dev/null
-From 288a8eb0d41f09fda242e05f8a7bd1f5b3489477 Mon Sep 17 00:00:00 2001
-From: Felix Fietkau <nbd@nbd.name>
-Date: Tue, 6 Mar 2018 13:19:26 +0100
-Subject: [PATCH 21/33] MIPS: ath79: add helpers for setting clocks and expose
- the ref clock
-
-Preparation for transitioning the legacy clock setup code over
-to OF.
-
-Signed-off-by: Felix Fietkau <nbd@nbd.name>
-Signed-off-by: John Crispin <john@phrozen.org>
----
- arch/mips/ath79/clock.c | 128 ++++++++++++++++++----------------
- include/dt-bindings/clock/ath79-clk.h | 3 +-
- 2 files changed, 68 insertions(+), 63 deletions(-)
-
---- a/arch/mips/ath79/clock.c
-+++ b/arch/mips/ath79/clock.c
-@@ -37,20 +37,46 @@ static struct clk_onecell_data clk_data
- .clk_num = ARRAY_SIZE(clks),
- };
-
--static struct clk *__init ath79_add_sys_clkdev(
-- const char *id, unsigned long rate)
-+static const char * const clk_names[ATH79_CLK_END] = {
-+ [ATH79_CLK_CPU] = "cpu",
-+ [ATH79_CLK_DDR] = "ddr",
-+ [ATH79_CLK_AHB] = "ahb",
-+ [ATH79_CLK_REF] = "ref",
-+};
-+
-+static const char * __init ath79_clk_name(int type)
- {
-- struct clk *clk;
-- int err;
-+ BUG_ON(type >= ARRAY_SIZE(clk_names) || !clk_names[type]);
-+ return clk_names[type];
-+}
-
-- clk = clk_register_fixed_rate(NULL, id, NULL, 0, rate);
-+static void __init __ath79_set_clk(int type, const char *name, struct clk *clk)
-+{
- if (IS_ERR(clk))
-- panic("failed to allocate %s clock structure", id);
-+ panic("failed to allocate %s clock structure", clk_names[type]);
-
-- err = clk_register_clkdev(clk, id, NULL);
-- if (err)
-- panic("unable to register %s clock device", id);
-+ clks[type] = clk;
-+ clk_register_clkdev(clk, name, NULL);
-+}
-
-+static struct clk * __init ath79_set_clk(int type, unsigned long rate)
-+{
-+ const char *name = ath79_clk_name(type);
-+ struct clk *clk;
-+
-+ clk = clk_register_fixed_rate(NULL, name, NULL, 0, rate);
-+ __ath79_set_clk(type, name, clk);
-+ return clk;
-+}
-+
-+static struct clk * __init ath79_set_ff_clk(int type, const char *parent,
-+ unsigned int mult, unsigned int div)
-+{
-+ const char *name = ath79_clk_name(type);
-+ struct clk *clk;
-+
-+ clk = clk_register_fixed_factor(NULL, name, parent, 0, mult, div);
-+ __ath79_set_clk(type, name, clk);
- return clk;
- }
-
-@@ -80,27 +106,15 @@ 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_add_sys_clkdev("ref", ref_rate);
-- clks[ATH79_CLK_CPU] = ath79_add_sys_clkdev("cpu", cpu_rate);
-- clks[ATH79_CLK_DDR] = ath79_add_sys_clkdev("ddr", ddr_rate);
-- clks[ATH79_CLK_AHB] = ath79_add_sys_clkdev("ahb", ahb_rate);
-+ 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);
-
- clk_add_alias("wdt", NULL, "ahb", NULL);
- clk_add_alias("uart", NULL, "ahb", NULL);
- }
-
--static struct clk * __init ath79_reg_ffclk(const char *name,
-- const char *parent_name, unsigned int mult, unsigned int div)
--{
-- struct clk *clk;
--
-- clk = clk_register_fixed_factor(NULL, name, parent_name, 0, mult, div);
-- if (IS_ERR(clk))
-- panic("failed to allocate %s clock structure", name);
--
-- return clk;
--}
--
- static void __init ar724x_clk_init(struct clk *ref_clk, void __iomem *pll_base)
- {
- u32 pll;
-@@ -114,24 +128,19 @@ static void __init ar724x_clk_init(struc
- ddr_div = ((pll >> AR724X_DDR_DIV_SHIFT) & AR724X_DDR_DIV_MASK) + 1;
- ahb_div = (((pll >> AR724X_AHB_DIV_SHIFT) & AR724X_AHB_DIV_MASK) + 1) * 2;
-
-- clks[ATH79_CLK_CPU] = ath79_reg_ffclk("cpu", "ref", mult, div);
-- clks[ATH79_CLK_DDR] = ath79_reg_ffclk("ddr", "ref", mult, div * ddr_div);
-- clks[ATH79_CLK_AHB] = ath79_reg_ffclk("ahb", "ref", mult, div * ahb_div);
-+ ath79_set_ff_clk(ATH79_CLK_CPU, "ref", mult, div);
-+ ath79_set_ff_clk(ATH79_CLK_DDR, "ref", mult, div * ddr_div);
-+ ath79_set_ff_clk(ATH79_CLK_AHB, "ref", mult, div * ahb_div);
- }
-
- static void __init ar724x_clocks_init(void)
- {
- struct clk *ref_clk;
-
-- ref_clk = ath79_add_sys_clkdev("ref", AR724X_BASE_FREQ);
-+ ref_clk = ath79_set_clk(ATH79_CLK_REF, AR724X_BASE_FREQ);
-
- ar724x_clk_init(ref_clk, ath79_pll_base);
-
-- /* just make happy plat_time_init() from arch/mips/ath79/setup.c */
-- clk_register_clkdev(clks[ATH79_CLK_CPU], "cpu", NULL);
-- clk_register_clkdev(clks[ATH79_CLK_DDR], "ddr", NULL);
-- clk_register_clkdev(clks[ATH79_CLK_AHB], "ahb", NULL);
--
- clk_add_alias("wdt", NULL, "ahb", NULL);
- clk_add_alias("uart", NULL, "ahb", NULL);
- }
-@@ -186,12 +195,12 @@ static void __init ar9330_clk_init(struc
- AR933X_PLL_CLOCK_CTRL_AHB_DIV_MASK) + 1;
- }
-
-- clks[ATH79_CLK_CPU] = ath79_reg_ffclk("cpu", "ref",
-- ninit_mul, ref_div * out_div * cpu_div);
-- clks[ATH79_CLK_DDR] = ath79_reg_ffclk("ddr", "ref",
-- ninit_mul, ref_div * out_div * ddr_div);
-- clks[ATH79_CLK_AHB] = ath79_reg_ffclk("ahb", "ref",
-- ninit_mul, ref_div * out_div * ahb_div);
-+ ath79_set_ff_clk(ATH79_CLK_CPU, "ref", ninit_mul,
-+ ref_div * out_div * cpu_div);
-+ ath79_set_ff_clk(ATH79_CLK_DDR, "ref", ninit_mul,
-+ ref_div * out_div * ddr_div);
-+ ath79_set_ff_clk(ATH79_CLK_AHB, "ref", ninit_mul,
-+ ref_div * out_div * ahb_div);
- }
-
- static void __init ar933x_clocks_init(void)
-@@ -206,15 +215,10 @@ static void __init ar933x_clocks_init(vo
- else
- ref_rate = (25 * 1000 * 1000);
-
-- ref_clk = ath79_add_sys_clkdev("ref", ref_rate);
-+ ref_clk = ath79_set_clk(ATH79_CLK_REF, ref_rate);
-
- ar9330_clk_init(ref_clk, ath79_pll_base);
-
-- /* just make happy plat_time_init() from arch/mips/ath79/setup.c */
-- clk_register_clkdev(clks[ATH79_CLK_CPU], "cpu", NULL);
-- clk_register_clkdev(clks[ATH79_CLK_DDR], "ddr", NULL);
-- clk_register_clkdev(clks[ATH79_CLK_AHB], "ahb", NULL);
--
- clk_add_alias("wdt", NULL, "ahb", NULL);
- clk_add_alias("uart", NULL, "ref", NULL);
- }
-@@ -344,10 +348,10 @@ static void __init ar934x_clocks_init(vo
- else
- ahb_rate = cpu_pll / (postdiv + 1);
-
-- ath79_add_sys_clkdev("ref", ref_rate);
-- clks[ATH79_CLK_CPU] = ath79_add_sys_clkdev("cpu", cpu_rate);
-- clks[ATH79_CLK_DDR] = ath79_add_sys_clkdev("ddr", ddr_rate);
-- clks[ATH79_CLK_AHB] = ath79_add_sys_clkdev("ahb", ahb_rate);
-+ 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);
-
- clk_add_alias("wdt", NULL, "ref", NULL);
- clk_add_alias("uart", NULL, "ref", NULL);
-@@ -431,10 +435,10 @@ static void __init qca953x_clocks_init(v
- else
- ahb_rate = cpu_pll / (postdiv + 1);
-
-- ath79_add_sys_clkdev("ref", ref_rate);
-- ath79_add_sys_clkdev("cpu", cpu_rate);
-- ath79_add_sys_clkdev("ddr", ddr_rate);
-- ath79_add_sys_clkdev("ahb", ahb_rate);
-+ 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);
-
- clk_add_alias("wdt", NULL, "ref", NULL);
- clk_add_alias("uart", NULL, "ref", NULL);
-@@ -516,10 +520,10 @@ static void __init qca955x_clocks_init(v
- else
- ahb_rate = cpu_pll / (postdiv + 1);
-
-- ath79_add_sys_clkdev("ref", ref_rate);
-- clks[ATH79_CLK_CPU] = ath79_add_sys_clkdev("cpu", cpu_rate);
-- clks[ATH79_CLK_DDR] = ath79_add_sys_clkdev("ddr", ddr_rate);
-- clks[ATH79_CLK_AHB] = ath79_add_sys_clkdev("ahb", ahb_rate);
-+ 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);
-
- clk_add_alias("wdt", NULL, "ref", NULL);
- clk_add_alias("uart", NULL, "ref", NULL);
-@@ -620,10 +624,10 @@ static void __init qca956x_clocks_init(v
- else
- ahb_rate = cpu_pll / (postdiv + 1);
-
-- ath79_add_sys_clkdev("ref", ref_rate);
-- ath79_add_sys_clkdev("cpu", cpu_rate);
-- ath79_add_sys_clkdev("ddr", ddr_rate);
-- ath79_add_sys_clkdev("ahb", ahb_rate);
-+ 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);
-
- clk_add_alias("wdt", NULL, "ref", NULL);
- clk_add_alias("uart", NULL, "ref", NULL);
---- a/include/dt-bindings/clock/ath79-clk.h
-+++ b/include/dt-bindings/clock/ath79-clk.h
-@@ -13,7 +13,8 @@
- #define ATH79_CLK_CPU 0
- #define ATH79_CLK_DDR 1
- #define ATH79_CLK_AHB 2
-+#define ATH79_CLK_REF 3
-
--#define ATH79_CLK_END 3
-+#define ATH79_CLK_END 4
-
- #endif /* __DT_BINDINGS_ATH79_CLK_H */
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