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Message-Id: <1348738595-9909-1-git-send-email-keguang.zhang@gmail.com>
Date: Thu, 27 Sep 2012 17:36:35 +0800
From: Kelvin Cheung <keguang.zhang@...il.com>
To: linux-mips@...ux-mips.org, linux-kernel@...r.kernel.org,
ralf@...ux-mips.org
Cc: Kelvin Cheung <keguang.zhang@...il.com>
Subject: [PATCH resend] MIPS: Loongson1B: use common clock infrastructure instead of private APIs.
1. Remove private clock APIs, which are replaced by the code in
drivers/clk/clk-ls1x.c
2. Enable COMMON_CLK in the Kconfig.
3. some minor modifications.
Signed-off-by: Kelvin Cheung <keguang.zhang@...il.com>
---
arch/mips/include/asm/mach-loongson1/platform.h | 3 +-
arch/mips/include/asm/mach-loongson1/regs-clk.h | 7 +-
arch/mips/loongson1/Kconfig | 2 +-
arch/mips/loongson1/common/clock.c | 159 +----------------------
arch/mips/loongson1/common/platform.c | 9 +-
arch/mips/loongson1/ls1b/board.c | 5 +-
6 files changed, 16 insertions(+), 169 deletions(-)
diff --git a/arch/mips/include/asm/mach-loongson1/platform.h b/arch/mips/include/asm/mach-loongson1/platform.h
index 2f17161..718a122 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;
-void ls1x_serial_setup(void);
+extern void __init ls1x_clk_init(void);
+extern void __init ls1x_serial_setup(struct platform_device *pdev);
#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..07133de 100644
--- a/arch/mips/loongson1/common/clock.c
+++ b/arch/mips/loongson1/common/clock.c
@@ -7,175 +7,22 @@
* option) any later version.
*/
-#include <linux/module.h>
-#include <linux/list.h>
-#include <linux/mutex.h>
#include <linux/clk.h>
#include <linux/err.h>
-#include <asm/clock.h>
#include <asm/time.h>
-
-#include <loongson1.h>
-
-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 <platform.h>
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");
if (IS_ERR(clk))
- panic("unable to get dc clock, err=%ld", PTR_ERR(clk));
+ panic("unable to get cpu clock, err=%ld", PTR_ERR(clk));
mips_hpt_frequency = clk_get_rate(clk) / 2;
}
diff --git a/arch/mips/loongson1/common/platform.c b/arch/mips/loongson1/common/platform.c
index e92d59c..5ca38dc 100644
--- a/arch/mips/loongson1/common/platform.c
+++ b/arch/mips/loongson1/common/platform.c
@@ -42,16 +42,17 @@ struct platform_device ls1x_uart_device = {
},
};
-void __init ls1x_serial_setup(void)
+void __init ls1x_serial_setup(struct platform_device *pdev)
{
struct clk *clk;
struct plat_serial8250_port *p;
- clk = clk_get(NULL, "dc");
+ clk = clk_get(NULL, pdev->name);
if (IS_ERR(clk))
- panic("unable to get dc clock, err=%ld", PTR_ERR(clk));
+ panic("unable to get %s clock, err=%ld",
+ pdev->name, PTR_ERR(clk));
- for (p = ls1x_serial8250_port; p->flags != 0; ++p)
+ for (p = pdev->dev.platform_data; p->flags != 0; ++p)
p->uartclk = clk_get_rate(clk);
}
diff --git a/arch/mips/loongson1/ls1b/board.c b/arch/mips/loongson1/ls1b/board.c
index 295b1be..1fbd526 100644
--- a/arch/mips/loongson1/ls1b/board.c
+++ b/arch/mips/loongson1/ls1b/board.c
@@ -9,9 +9,6 @@
#include <platform.h>
-#include <linux/serial_8250.h>
-#include <loongson1.h>
-
static struct platform_device *ls1b_platform_devices[] __initdata = {
&ls1x_uart_device,
&ls1x_eth0_device,
@@ -23,7 +20,7 @@ static int __init ls1b_platform_init(void)
{
int err;
- ls1x_serial_setup();
+ ls1x_serial_setup(&ls1x_uart_device);
err = platform_add_devices(ls1b_platform_devices,
ARRAY_SIZE(ls1b_platform_devices));
--
1.7.1
--
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