ARM: mach-shmobile: clock-r8a7740: add USB clock
R8A7740 USB needs many clocks for workaround,
and it has confusing name "usb24s" and "usb24".
This "usb24s" will be used by other clocks.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Tested-by: Simon Horman <horms@verge.net.au>
Acked-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
diff --git a/arch/arm/mach-shmobile/clock-r8a7740.c b/arch/arm/mach-shmobile/clock-r8a7740.c
index b6fa1b7..b9b1d73 100644
--- a/arch/arm/mach-shmobile/clock-r8a7740.c
+++ b/arch/arm/mach-shmobile/clock-r8a7740.c
@@ -47,6 +47,7 @@
#define PLLC01CR 0xe6150028
#define SUBCKCR 0xe6150080
+#define USBCKCR 0xe615008c
#define MSTPSR0 0xe6150030
#define MSTPSR1 0xe6150038
@@ -181,6 +182,100 @@
.parent = &pllc1_clk,
};
+/* USB clock */
+static struct clk *usb24s_parents[] = {
+ [0] = &system_clk,
+ [1] = &extal2_clk
+};
+
+static unsigned long usb24s_recalc(struct clk *clk)
+{
+ return clk->parent->rate;
+};
+
+static int usb24s_enable(struct clk *clk)
+{
+ __raw_writel(__raw_readl(USBCKCR) & ~(1 << 8), USBCKCR);
+
+ return 0;
+}
+
+static void usb24s_disable(struct clk *clk)
+{
+ __raw_writel(__raw_readl(USBCKCR) | (1 << 8), USBCKCR);
+}
+
+static int usb24s_set_parent(struct clk *clk, struct clk *parent)
+{
+ int i, ret;
+ u32 val;
+
+ if (!clk->parent_table || !clk->parent_num)
+ return -EINVAL;
+
+ /* Search the parent */
+ for (i = 0; i < clk->parent_num; i++)
+ if (clk->parent_table[i] == parent)
+ break;
+
+ if (i == clk->parent_num)
+ return -ENODEV;
+
+ ret = clk_reparent(clk, parent);
+ if (ret < 0)
+ return ret;
+
+ val = __raw_readl(USBCKCR);
+ val &= ~(1 << 7);
+ val |= i << 7;
+ __raw_writel(val, USBCKCR);
+
+ return 0;
+}
+
+static struct sh_clk_ops usb24s_clk_ops = {
+ .recalc = usb24s_recalc,
+ .enable = usb24s_enable,
+ .disable = usb24s_disable,
+ .set_parent = usb24s_set_parent,
+};
+
+static struct clk usb24s_clk = {
+ .ops = &usb24s_clk_ops,
+ .parent_table = usb24s_parents,
+ .parent_num = ARRAY_SIZE(usb24s_parents),
+ .parent = &system_clk,
+};
+
+static unsigned long usb24_recalc(struct clk *clk)
+{
+ return clk->parent->rate /
+ ((__raw_readl(USBCKCR) & (1 << 6)) ? 1 : 2);
+};
+
+static int usb24_set_rate(struct clk *clk, unsigned long rate)
+{
+ u32 val;
+
+ /* closer to which ? parent->rate or parent->rate/2 */
+ val = __raw_readl(USBCKCR);
+ val &= ~(1 << 6);
+ val |= (rate > (clk->parent->rate / 4) * 3) << 6;
+ __raw_writel(val, USBCKCR);
+
+ return 0;
+}
+
+static struct sh_clk_ops usb24_clk_ops = {
+ .recalc = usb24_recalc,
+ .set_rate = usb24_set_rate,
+};
+
+static struct clk usb24_clk = {
+ .ops = &usb24_clk_ops,
+ .parent = &usb24s_clk,
+};
+
struct clk *main_clks[] = {
&extalr_clk,
&extal1_clk,
@@ -196,6 +291,8 @@
&pllc0_clk,
&pllc1_clk,
&pllc1_div2_clk,
+ &usb24s_clk,
+ &usb24_clk,
};
static void div4_kick(struct clk *clk)
@@ -223,7 +320,7 @@
enum {
DIV4_I, DIV4_ZG, DIV4_B, DIV4_M1, DIV4_HP,
- DIV4_HPP, DIV4_S, DIV4_ZB, DIV4_M3, DIV4_CP,
+ DIV4_HPP, DIV4_USBP, DIV4_S, DIV4_ZB, DIV4_M3, DIV4_CP,
DIV4_NR
};
@@ -234,6 +331,7 @@
[DIV4_M1] = SH_CLK_DIV4(&pllc1_clk, FRQCRA, 4, 0x6fff, CLK_ENABLE_ON_INIT),
[DIV4_HP] = SH_CLK_DIV4(&pllc1_clk, FRQCRB, 4, 0x6fff, 0),
[DIV4_HPP] = SH_CLK_DIV4(&pllc1_clk, FRQCRC, 20, 0x6fff, 0),
+ [DIV4_USBP] = SH_CLK_DIV4(&pllc1_clk, FRQCRC, 16, 0x6fff, 0),
[DIV4_S] = SH_CLK_DIV4(&pllc1_clk, FRQCRC, 12, 0x6fff, 0),
[DIV4_ZB] = SH_CLK_DIV4(&pllc1_clk, FRQCRC, 8, 0x6fff, 0),
[DIV4_M3] = SH_CLK_DIV4(&pllc1_clk, FRQCRC, 4, 0x6fff, 0),
@@ -257,7 +355,9 @@
MSTP222,
MSTP207, MSTP206, MSTP204, MSTP203, MSTP202, MSTP201, MSTP200,
- MSTP329, MSTP328, MSTP323,
+ MSTP329, MSTP328, MSTP323, MSTP320,
+
+ MSTP416, MSTP407, MSTP406,
MSTP_NR
};
@@ -282,6 +382,11 @@
[MSTP329] = SH_CLK_MSTP32(&r_clk, SMSTPCR3, 29, 0), /* CMT10 */
[MSTP328] = SH_CLK_MSTP32(&div4_clks[DIV4_HP], SMSTPCR3, 28, 0), /* FSI */
[MSTP323] = SH_CLK_MSTP32(&div6_clks[DIV6_SUB], SMSTPCR3, 23, 0), /* IIC1 */
+ [MSTP320] = SH_CLK_MSTP32(&div4_clks[DIV4_HP], SMSTPCR3, 20, 0), /* USBF */
+
+ [MSTP416] = SH_CLK_MSTP32(&div4_clks[DIV4_HP], SMSTPCR4, 16, 0), /* USBHOST */
+ [MSTP407] = SH_CLK_MSTP32(&div4_clks[DIV4_HP], SMSTPCR4, 7, 0), /* USB-Func */
+ [MSTP406] = SH_CLK_MSTP32(&div4_clks[DIV4_HP], SMSTPCR4, 6, 0), /* USB Phy */
};
static struct clk_lookup lookups[] = {
@@ -300,6 +405,7 @@
CLKDEV_CON_ID("pllc0_clk", &pllc0_clk),
CLKDEV_CON_ID("pllc1_clk", &pllc1_clk),
CLKDEV_CON_ID("pllc1_div2_clk", &pllc1_div2_clk),
+ CLKDEV_CON_ID("usb24s", &usb24s_clk),
/* DIV4 clocks */
CLKDEV_CON_ID("i_clk", &div4_clks[DIV4_I]),
@@ -337,6 +443,14 @@
CLKDEV_DEV_ID("sh_cmt.10", &mstp_clks[MSTP329]),
CLKDEV_DEV_ID("sh_fsi2", &mstp_clks[MSTP328]),
CLKDEV_DEV_ID("i2c-sh_mobile.1", &mstp_clks[MSTP323]),
+ CLKDEV_DEV_ID("renesas_usbhs", &mstp_clks[MSTP320]),
+
+ /* ICK */
+ CLKDEV_ICK_ID("host", "renesas_usbhs", &mstp_clks[MSTP416]),
+ CLKDEV_ICK_ID("func", "renesas_usbhs", &mstp_clks[MSTP407]),
+ CLKDEV_ICK_ID("phy", "renesas_usbhs", &mstp_clks[MSTP406]),
+ CLKDEV_ICK_ID("pci", "renesas_usbhs", &div4_clks[DIV4_USBP]),
+ CLKDEV_ICK_ID("usb24", "renesas_usbhs", &usb24_clk),
};
void __init r8a7740_clock_init(u8 md_ck)