ARM: S3C2443: Move parts of the clock code to common clock file
To share code with some of the newer parts such as the S3C2416, move
parts of arch/arm/mach-s3c2443/clock.c to a common file called
arch/arm/plat-s3c24xx/s3c2443-clock.c.
Update the build configuration to deal with this new file.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
diff --git a/arch/arm/mach-s3c2443/clock.c b/arch/arm/mach-s3c2443/clock.c
index 76d8d66..83b1aa6 100644
--- a/arch/arm/mach-s3c2443/clock.c
+++ b/arch/arm/mach-s3c2443/clock.c
@@ -21,6 +21,7 @@
*/
#include <linux/init.h>
+
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/list.h>
@@ -54,111 +55,13 @@
* set the correct muxing at initialisation
*/
-static int s3c2443_gate(void __iomem *reg, struct clk *clk, int enable)
-{
- u32 ctrlbit = clk->ctrlbit;
- u32 con = __raw_readl(reg);
-
- if (enable)
- con |= ctrlbit;
- else
- con &= ~ctrlbit;
-
- __raw_writel(con, reg);
- return 0;
-}
-
-static int s3c2443_clkcon_enable_h(struct clk *clk, int enable)
-{
- return s3c2443_gate(S3C2443_HCLKCON, clk, enable);
-}
-
-static int s3c2443_clkcon_enable_p(struct clk *clk, int enable)
-{
- return s3c2443_gate(S3C2443_PCLKCON, clk, enable);
-}
-
-static int s3c2443_clkcon_enable_s(struct clk *clk, int enable)
-{
- return s3c2443_gate(S3C2443_SCLKCON, clk, enable);
-}
-
/* clock selections */
-/* mpllref is a direct descendant of clk_xtal by default, but it is not
- * elided as the EPLL can be either sourced by the XTAL or EXTCLK and as
- * such directly equating the two source clocks is impossible.
- */
-static struct clk clk_mpllref = {
- .name = "mpllref",
- .parent = &clk_xtal,
- .id = -1,
-};
-
static struct clk clk_i2s_ext = {
.name = "i2s-ext",
.id = -1,
};
-static struct clk *clk_epllref_sources[] = {
- [0] = &clk_mpllref,
- [1] = &clk_mpllref,
- [2] = &clk_xtal,
- [3] = &clk_ext,
-};
-
-static struct clksrc_clk clk_epllref = {
- .clk = {
- .name = "epllref",
- .id = -1,
- },
- .sources = &(struct clksrc_sources) {
- .sources = clk_epllref_sources,
- .nr_sources = ARRAY_SIZE(clk_epllref_sources),
- },
- .reg_src = { .reg = S3C2443_CLKSRC, .size = 2, .shift = 7 },
-};
-
-static unsigned long s3c2443_getrate_mdivclk(struct clk *clk)
-{
- unsigned long parent_rate = clk_get_rate(clk->parent);
- unsigned long div = __raw_readl(S3C2443_CLKDIV0);
-
- div &= S3C2443_CLKDIV0_EXTDIV_MASK;
- div >>= (S3C2443_CLKDIV0_EXTDIV_SHIFT-1); /* x2 */
-
- return parent_rate / (div + 1);
-}
-
-static struct clk clk_mdivclk = {
- .name = "mdivclk",
- .parent = &clk_mpllref,
- .id = -1,
- .ops = &(struct clk_ops) {
- .get_rate = s3c2443_getrate_mdivclk,
- },
-};
-
-static struct clk *clk_msysclk_sources[] = {
- [0] = &clk_mpllref,
- [1] = &clk_mpll,
- [2] = &clk_mdivclk,
- [3] = &clk_mpllref,
-};
-
-static struct clksrc_clk clk_msysclk = {
- .clk = {
- .name = "msysclk",
- .parent = &clk_xtal,
- .id = -1,
- },
- .sources = &(struct clksrc_sources) {
- .sources = clk_msysclk_sources,
- .nr_sources = ARRAY_SIZE(clk_msysclk_sources),
- },
- .reg_src = { .reg = S3C2443_CLKSRC, .size = 2, .shift = 3 },
-};
-
/* armdiv
*
* this clock is sourced from msysclk and can have a number of
@@ -266,44 +169,6 @@
.reg_src = { .reg = S3C2443_CLKDIV0, .size = 1, .shift = 13 },
};
-/* esysclk
- *
- * this is sourced from either the EPLL or the EPLLref clock
-*/
-
-static struct clk *clk_sysclk_sources[] = {
- [0] = &clk_epllref.clk,
- [1] = &clk_epll,
-};
-
-static struct clksrc_clk clk_esysclk = {
- .clk = {
- .name = "esysclk",
- .parent = &clk_epll,
- .id = -1,
- },
- .sources = &(struct clksrc_sources) {
- .sources = clk_sysclk_sources,
- .nr_sources = ARRAY_SIZE(clk_sysclk_sources),
- },
- .reg_src = { .reg = S3C2443_CLKSRC, .size = 1, .shift = 6 },
-};
-
-/* uartclk
- *
- * UART baud-rate clock sourced from esysclk via a divisor
-*/
-
-static struct clksrc_clk clk_uart = {
- .clk = {
- .name = "uartclk",
- .id = -1,
- .parent = &clk_esysclk.clk,
- },
- .reg_div = { .reg = S3C2443_CLKDIV1, .size = 4, .shift = 8 },
-};
-
-
/* hsspi
*
* high-speed spi clock, sourced from esysclk
@@ -320,21 +185,6 @@
.reg_div = { .reg = S3C2443_CLKDIV1, .size = 2, .shift = 4 },
};
-/* usbhost
- *
- * usb host bus-clock, usually 48MHz to provide USB bus clock timing
-*/
-
-static struct clksrc_clk clk_usb_bus_host = {
- .clk = {
- .name = "usb-bus-host-parent",
- .id = -1,
- .parent = &clk_esysclk.clk,
- .ctrlbit = S3C2443_SCLKCON_USBHOST,
- .enable = s3c2443_clkcon_enable_s,
- },
- .reg_div = { .reg = S3C2443_CLKDIV1, .size = 2, .shift = 4 },
-};
/* clk_hsmcc_div
*
@@ -433,89 +283,16 @@
.reg_src = { .reg = S3C2443_CLKSRC, .size = 2, .shift = 14 },
};
-/* cam-if
- *
- * camera interface bus-clock, divided down from esysclk
-*/
-
-static struct clksrc_clk clk_cam = {
- .clk = {
- .name = "camif-upll", /* same as 2440 name */
- .id = -1,
- .parent = &clk_esysclk.clk,
- .ctrlbit = S3C2443_SCLKCON_CAMCLK,
- .enable = s3c2443_clkcon_enable_s,
- },
- .reg_div = { .reg = S3C2443_CLKDIV1, .size = 4, .shift = 26 },
-};
-
-/* display-if
- *
- * display interface clock, divided from esysclk
-*/
-
-static struct clksrc_clk clk_display = {
- .clk = {
- .name = "display-if",
- .id = -1,
- .parent = &clk_esysclk.clk,
- .ctrlbit = S3C2443_SCLKCON_DISPCLK,
- .enable = s3c2443_clkcon_enable_s,
- },
- .reg_div = { .reg = S3C2443_CLKDIV1, .size = 8, .shift = 16 },
-};
-
-/* prediv
- *
- * this divides the msysclk down to pass to h/p/etc.
- */
-
-static unsigned long s3c2443_prediv_getrate(struct clk *clk)
-{
- unsigned long rate = clk_get_rate(clk->parent);
- unsigned long clkdiv0 = __raw_readl(S3C2443_CLKDIV0);
-
- clkdiv0 &= S3C2443_CLKDIV0_PREDIV_MASK;
- clkdiv0 >>= S3C2443_CLKDIV0_PREDIV_SHIFT;
-
- return rate / (clkdiv0 + 1);
-}
-
-static struct clk clk_prediv = {
- .name = "prediv",
- .id = -1,
- .parent = &clk_msysclk.clk,
- .ops = &(struct clk_ops) {
- .get_rate = s3c2443_prediv_getrate,
- },
-};
-
/* standard clock definitions */
static struct clk init_clocks_off[] = {
{
- .name = "nand",
- .id = -1,
- .parent = &clk_h,
- }, {
.name = "sdi",
.id = -1,
.parent = &clk_p,
.enable = s3c2443_clkcon_enable_p,
.ctrlbit = S3C2443_PCLKCON_SDI,
}, {
- .name = "adc",
- .id = -1,
- .parent = &clk_p,
- .enable = s3c2443_clkcon_enable_p,
- .ctrlbit = S3C2443_PCLKCON_ADC,
- }, {
- .name = "i2c",
- .id = -1,
- .parent = &clk_p,
- .enable = s3c2443_clkcon_enable_p,
- .ctrlbit = S3C2443_PCLKCON_IIC,
- }, {
.name = "iis",
.id = -1,
.parent = &clk_p,
@@ -537,179 +314,12 @@
};
static struct clk init_clocks[] = {
- {
- .name = "dma",
- .id = 0,
- .parent = &clk_h,
- .enable = s3c2443_clkcon_enable_h,
- .ctrlbit = S3C2443_HCLKCON_DMA0,
- }, {
- .name = "dma",
- .id = 1,
- .parent = &clk_h,
- .enable = s3c2443_clkcon_enable_h,
- .ctrlbit = S3C2443_HCLKCON_DMA1,
- }, {
- .name = "dma",
- .id = 2,
- .parent = &clk_h,
- .enable = s3c2443_clkcon_enable_h,
- .ctrlbit = S3C2443_HCLKCON_DMA2,
- }, {
- .name = "dma",
- .id = 3,
- .parent = &clk_h,
- .enable = s3c2443_clkcon_enable_h,
- .ctrlbit = S3C2443_HCLKCON_DMA3,
- }, {
- .name = "dma",
- .id = 4,
- .parent = &clk_h,
- .enable = s3c2443_clkcon_enable_h,
- .ctrlbit = S3C2443_HCLKCON_DMA4,
- }, {
- .name = "dma",
- .id = 5,
- .parent = &clk_h,
- .enable = s3c2443_clkcon_enable_h,
- .ctrlbit = S3C2443_HCLKCON_DMA5,
- }, {
- .name = "lcd",
- .id = -1,
- .parent = &clk_h,
- .enable = s3c2443_clkcon_enable_h,
- .ctrlbit = S3C2443_HCLKCON_LCDC,
- }, {
- .name = "gpio",
- .id = -1,
- .parent = &clk_p,
- .enable = s3c2443_clkcon_enable_p,
- .ctrlbit = S3C2443_PCLKCON_GPIO,
- }, {
- .name = "usb-host",
- .id = -1,
- .parent = &clk_h,
- .enable = s3c2443_clkcon_enable_h,
- .ctrlbit = S3C2443_HCLKCON_USBH,
- }, {
- .name = "usb-device",
- .id = -1,
- .parent = &clk_h,
- .enable = s3c2443_clkcon_enable_h,
- .ctrlbit = S3C2443_HCLKCON_USBD,
- }, {
- .name = "hsmmc",
- .id = -1,
- .parent = &clk_h,
- .enable = s3c2443_clkcon_enable_h,
- .ctrlbit = S3C2443_HCLKCON_HSMMC,
- }, {
- .name = "cfc",
- .id = -1,
- .parent = &clk_h,
- .enable = s3c2443_clkcon_enable_h,
- .ctrlbit = S3C2443_HCLKCON_CFC,
- }, {
- .name = "ssmc",
- .id = -1,
- .parent = &clk_h,
- .enable = s3c2443_clkcon_enable_h,
- .ctrlbit = S3C2443_HCLKCON_SSMC,
- }, {
- .name = "timers",
- .id = -1,
- .parent = &clk_p,
- .enable = s3c2443_clkcon_enable_p,
- .ctrlbit = S3C2443_PCLKCON_PWMT,
- }, {
- .name = "uart",
- .id = 0,
- .parent = &clk_p,
- .enable = s3c2443_clkcon_enable_p,
- .ctrlbit = S3C2443_PCLKCON_UART0,
- }, {
- .name = "uart",
- .id = 1,
- .parent = &clk_p,
- .enable = s3c2443_clkcon_enable_p,
- .ctrlbit = S3C2443_PCLKCON_UART1,
- }, {
- .name = "uart",
- .id = 2,
- .parent = &clk_p,
- .enable = s3c2443_clkcon_enable_p,
- .ctrlbit = S3C2443_PCLKCON_UART2,
- }, {
- .name = "uart",
- .id = 3,
- .parent = &clk_p,
- .enable = s3c2443_clkcon_enable_p,
- .ctrlbit = S3C2443_PCLKCON_UART3,
- }, {
- .name = "rtc",
- .id = -1,
- .parent = &clk_p,
- .enable = s3c2443_clkcon_enable_p,
- .ctrlbit = S3C2443_PCLKCON_RTC,
- }, {
- .name = "watchdog",
- .id = -1,
- .parent = &clk_p,
- .ctrlbit = S3C2443_PCLKCON_WDT,
- }, {
- .name = "usb-bus-host",
- .id = -1,
- .parent = &clk_usb_bus_host.clk,
- }, {
- .name = "ac97",
- .id = -1,
- .parent = &clk_p,
- .ctrlbit = S3C2443_PCLKCON_AC97,
- }
};
-/* clocks to add where we need to check their parentage */
-
-static struct clksrc_clk __initdata *init_list[] = {
- &clk_epllref, /* should be first */
- &clk_esysclk,
- &clk_msysclk,
- &clk_arm,
- &clk_i2s_eplldiv,
- &clk_i2s,
- &clk_cam,
- &clk_uart,
- &clk_display,
- &clk_hsmmc_div,
- &clk_usb_bus_host,
-};
-
-static void __init s3c2443_clk_initparents(void)
-{
- int ptr;
-
- for (ptr = 0; ptr < ARRAY_SIZE(init_list); ptr++)
- s3c_set_clksrc(init_list[ptr], true);
-}
-
-static inline unsigned long s3c2443_get_hdiv(unsigned long clkcon0)
-{
- clkcon0 &= S3C2443_CLKDIV0_HCLKDIV_MASK;
-
- return clkcon0 + 1;
-}
-
/* clocks to add straight away */
static struct clksrc_clk *clksrcs[] __initdata = {
- &clk_usb_bus_host,
- &clk_epllref,
- &clk_esysclk,
- &clk_msysclk,
&clk_arm,
- &clk_uart,
- &clk_display,
- &clk_cam,
&clk_i2s_eplldiv,
&clk_i2s,
&clk_hsspi,
@@ -717,46 +327,13 @@
};
static struct clk *clks[] __initdata = {
- &clk_ext,
- &clk_epll,
- &clk_usb_bus,
- &clk_mpllref,
&clk_hsmmc,
&clk_armdiv,
- &clk_prediv,
};
void __init_or_cpufreq s3c2443_setup_clocks(void)
{
- unsigned long mpllcon = __raw_readl(S3C2443_MPLLCON);
- unsigned long clkdiv0 = __raw_readl(S3C2443_CLKDIV0);
- struct clk *xtal_clk;
- unsigned long xtal;
- unsigned long pll;
- unsigned long fclk;
- unsigned long hclk;
- unsigned long pclk;
-
- xtal_clk = clk_get(NULL, "xtal");
- xtal = clk_get_rate(xtal_clk);
- clk_put(xtal_clk);
-
- pll = s3c2443_get_mpll(mpllcon, xtal);
- clk_msysclk.clk.rate = pll;
-
- fclk = pll / s3c2443_fclk_div(clkdiv0);
- hclk = s3c2443_prediv_getrate(&clk_prediv);
- hclk /= s3c2443_get_hdiv(clkdiv0);
- pclk = hclk / ((clkdiv0 & S3C2443_CLKDIV0_HALF_PCLK) ? 2 : 1);
-
- s3c24xx_setup_clocks(fclk, hclk, pclk);
-
- printk("S3C2443: mpll %s %ld.%03ld MHz, cpu %ld.%03ld MHz, mem %ld.%03ld MHz, pclk %ld.%03ld MHz\n",
- (mpllcon & S3C2443_PLLCON_OFF) ? "off":"on",
- print_mhz(pll), print_mhz(fclk),
- print_mhz(hclk), print_mhz(pclk));
-
- s3c24xx_setup_clocks(fclk, hclk, pclk);
+ s3c2443_common_setup_clocks(s3c2443_get_mpll, s3c2443_fclk_div);
}
void __init s3c2443_init_clocks(int xtal)
@@ -764,35 +341,18 @@
unsigned long epllcon = __raw_readl(S3C2443_EPLLCON);
int ptr;
- /* s3c2443 parents h and p clocks from prediv */
- clk_h.parent = &clk_prediv;
- clk_p.parent = &clk_prediv;
+ clk_epll.rate = s3c2443_get_epll(epllcon, xtal);
+ clk_epll.parent = &clk_epllref.clk;
- s3c24xx_register_baseclocks(xtal);
+ s3c2443_common_init_clocks(xtal, s3c2443_get_mpll, s3c2443_fclk_div);
+
s3c2443_setup_clocks();
- s3c2443_clk_initparents();
s3c24xx_register_clocks(clks, ARRAY_SIZE(clks));
for (ptr = 0; ptr < ARRAY_SIZE(clksrcs); ptr++)
s3c_register_clksrc(clksrcs[ptr], 1);
- clk_epll.rate = s3c2443_get_epll(epllcon, xtal);
- clk_epll.parent = &clk_epllref.clk;
- clk_usb_bus.parent = &clk_usb_bus_host.clk;
-
- /* ensure usb bus clock is within correct rate of 48MHz */
-
- if (clk_get_rate(&clk_usb_bus_host.clk) != (48 * 1000 * 1000)) {
- printk(KERN_INFO "Warning: USB host bus not at 48MHz\n");
- clk_set_rate(&clk_usb_bus_host.clk, 48*1000*1000);
- }
-
- printk("S3C2443: epll %s %ld.%03ld MHz, usb-bus %ld.%03ld MHz\n",
- (epllcon & S3C2443_PLLCON_OFF) ? "off":"on",
- print_mhz(clk_get_rate(&clk_epll)),
- print_mhz(clk_get_rate(&clk_usb_bus)));
-
/* register clocks from clock array */
s3c_register_clocks(init_clocks, ARRAY_SIZE(init_clocks));