From: Kelvin Cheung Date: Tue, 23 Oct 2012 05:17:00 +0000 (+0000) Subject: MIPS: Loongson1B: use common clock infrastructure instead of private APIs X-Git-Tag: upstream/snapshot3+hdmi~6066^2^2~21 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=17ded0a89b3b0b6ac626d58d469ef899f21e2d42;p=platform%2Fadaptation%2Frenesas_rcar%2Frenesas_kernel.git MIPS: Loongson1B: use common clock infrastructure instead of private APIs Use common clock infrastructure instead of private APIs. 1. Enable COMMON_CLK in the Kconfig. 2. Remove private clock APIs, which are replaced by the code in drivers/clk/clk-ls1x.c. 3. Modify header file for drivers/clk/clk-ls1x.c. Signed-off-by: Kelvin Cheung Patchwork: http://patchwork.linux-mips.org/patch/4431 Signed-off-by: John Crispin --- diff --git a/arch/mips/include/asm/mach-loongson1/platform.h b/arch/mips/include/asm/mach-loongson1/platform.h index 2f17161..f584017 100644 --- a/arch/mips/include/asm/mach-loongson1/platform.h +++ b/arch/mips/include/asm/mach-loongson1/platform.h @@ -18,6 +18,7 @@ extern struct platform_device ls1x_eth0_device; extern struct platform_device ls1x_ehci_device; extern struct platform_device ls1x_rtc_device; +extern void __init ls1x_clk_init(void); void ls1x_serial_setup(void); #endif /* __ASM_MACH_LOONGSON1_PLATFORM_H */ diff --git a/arch/mips/include/asm/mach-loongson1/regs-clk.h b/arch/mips/include/asm/mach-loongson1/regs-clk.h index 8efa7fb..a81fa3d 100644 --- a/arch/mips/include/asm/mach-loongson1/regs-clk.h +++ b/arch/mips/include/asm/mach-loongson1/regs-clk.h @@ -20,14 +20,15 @@ /* Clock PLL Divisor Register Bits */ #define DIV_DC_EN (0x1 << 31) -#define DIV_DC (0x1f << 26) #define DIV_CPU_EN (0x1 << 25) -#define DIV_CPU (0x1f << 20) #define DIV_DDR_EN (0x1 << 19) -#define DIV_DDR (0x1f << 14) #define DIV_DC_SHIFT 26 #define DIV_CPU_SHIFT 20 #define DIV_DDR_SHIFT 14 +#define DIV_DC_WIDTH 5 +#define DIV_CPU_WIDTH 5 +#define DIV_DDR_WIDTH 5 + #endif /* __ASM_MACH_LOONGSON1_REGS_CLK_H */ diff --git a/arch/mips/loongson1/Kconfig b/arch/mips/loongson1/Kconfig index a9a14d6..fbf75f6 100644 --- a/arch/mips/loongson1/Kconfig +++ b/arch/mips/loongson1/Kconfig @@ -15,7 +15,7 @@ config LOONGSON1_LS1B select SYS_SUPPORTS_LITTLE_ENDIAN select SYS_SUPPORTS_HIGHMEM select SYS_HAS_EARLY_PRINTK - select HAVE_CLK + select COMMON_CLK endchoice diff --git a/arch/mips/loongson1/common/clock.c b/arch/mips/loongson1/common/clock.c index 1bbbbec..7db0a6a 100644 --- a/arch/mips/loongson1/common/clock.c +++ b/arch/mips/loongson1/common/clock.c @@ -7,170 +7,17 @@ * option) any later version. */ -#include -#include -#include #include #include -#include #include - -#include - -static LIST_HEAD(clocks); -static DEFINE_MUTEX(clocks_mutex); - -struct clk *clk_get(struct device *dev, const char *name) -{ - struct clk *c; - struct clk *ret = NULL; - - mutex_lock(&clocks_mutex); - list_for_each_entry(c, &clocks, node) { - if (!strcmp(c->name, name)) { - ret = c; - break; - } - } - mutex_unlock(&clocks_mutex); - - return ret; -} -EXPORT_SYMBOL(clk_get); - -int clk_enable(struct clk *clk) -{ - return 0; -} -EXPORT_SYMBOL(clk_enable); - -void clk_disable(struct clk *clk) -{ -} -EXPORT_SYMBOL(clk_disable); - -unsigned long clk_get_rate(struct clk *clk) -{ - return clk->rate; -} -EXPORT_SYMBOL(clk_get_rate); - -void clk_put(struct clk *clk) -{ -} -EXPORT_SYMBOL(clk_put); - -static void pll_clk_init(struct clk *clk) -{ - u32 pll; - - pll = __raw_readl(LS1X_CLK_PLL_FREQ); - clk->rate = (12 + (pll & 0x3f)) * 33 / 2 - + ((pll >> 8) & 0x3ff) * 33 / 1024 / 2; - clk->rate *= 1000000; -} - -static void cpu_clk_init(struct clk *clk) -{ - u32 pll, ctrl; - - pll = clk_get_rate(clk->parent); - ctrl = __raw_readl(LS1X_CLK_PLL_DIV) & DIV_CPU; - clk->rate = pll / (ctrl >> DIV_CPU_SHIFT); -} - -static void ddr_clk_init(struct clk *clk) -{ - u32 pll, ctrl; - - pll = clk_get_rate(clk->parent); - ctrl = __raw_readl(LS1X_CLK_PLL_DIV) & DIV_DDR; - clk->rate = pll / (ctrl >> DIV_DDR_SHIFT); -} - -static void dc_clk_init(struct clk *clk) -{ - u32 pll, ctrl; - - pll = clk_get_rate(clk->parent); - ctrl = __raw_readl(LS1X_CLK_PLL_DIV) & DIV_DC; - clk->rate = pll / (ctrl >> DIV_DC_SHIFT); -} - -static struct clk_ops pll_clk_ops = { - .init = pll_clk_init, -}; - -static struct clk_ops cpu_clk_ops = { - .init = cpu_clk_init, -}; - -static struct clk_ops ddr_clk_ops = { - .init = ddr_clk_init, -}; - -static struct clk_ops dc_clk_ops = { - .init = dc_clk_init, -}; - -static struct clk pll_clk = { - .name = "pll", - .ops = &pll_clk_ops, -}; - -static struct clk cpu_clk = { - .name = "cpu", - .parent = &pll_clk, - .ops = &cpu_clk_ops, -}; - -static struct clk ddr_clk = { - .name = "ddr", - .parent = &pll_clk, - .ops = &ddr_clk_ops, -}; - -static struct clk dc_clk = { - .name = "dc", - .parent = &pll_clk, - .ops = &dc_clk_ops, -}; - -int clk_register(struct clk *clk) -{ - mutex_lock(&clocks_mutex); - list_add(&clk->node, &clocks); - if (clk->ops->init) - clk->ops->init(clk); - mutex_unlock(&clocks_mutex); - - return 0; -} -EXPORT_SYMBOL(clk_register); - -static struct clk *ls1x_clks[] = { - &pll_clk, - &cpu_clk, - &ddr_clk, - &dc_clk, -}; - -int __init ls1x_clock_init(void) -{ - int i; - - for (i = 0; i < ARRAY_SIZE(ls1x_clks); i++) - clk_register(ls1x_clks[i]); - - return 0; -} +#include void __init plat_time_init(void) { struct clk *clk; /* Initialize LS1X clocks */ - ls1x_clock_init(); + ls1x_clk_init(); /* setup mips r4k timer */ clk = clk_get(NULL, "cpu");