*/
static DEFINE_SPINLOCK(clock_register_lock);
+/*
+ * Some peripheral clocks share an enable bit, so refcount the enable bits
+ * in registers CLK_ENABLE_L, CLK_ENABLE_H, and CLK_ENABLE_U
+ */
+static int tegra_periph_clk_enable_refcount[3 * 32];
+
#define clk_writel(value, reg) \
__raw_writel(value, (u32)reg_clk_base + (reg))
#define clk_readl(reg) \
divider = clk_div71_get_divider(parent_rate, rate);
if (divider < 0)
return divider;
- return parent_rate * 2 / (divider + 2);
+ return DIV_ROUND_UP(parent_rate * 2, divider + 2);
} else if (c->flags & DIV_2) {
- return parent_rate / 2;
+ return DIV_ROUND_UP(parent_rate, 2);
}
return -EINVAL;
}
}
c->state = ON;
+
+ if (!c->u.periph.clk_num)
+ return;
+
if (!(clk_readl(CLK_OUT_ENB + PERIPH_CLK_TO_ENB_REG(c)) &
PERIPH_CLK_TO_ENB_BIT(c)))
c->state = OFF;
+
if (!(c->flags & PERIPH_NO_RESET))
if (clk_readl(RST_DEVICES + PERIPH_CLK_TO_ENB_REG(c)) &
PERIPH_CLK_TO_ENB_BIT(c))
static int tegra2_periph_clk_enable(struct clk *c)
{
u32 val;
+ unsigned long flags;
+ int refcount;
pr_debug("%s on clock %s\n", __func__, c->name);
+ if (!c->u.periph.clk_num)
+ return 0;
+
+ spin_lock_irqsave(&clock_register_lock, flags);
+
+ refcount = tegra_periph_clk_enable_refcount[c->u.periph.clk_num]++;
+
+ if (refcount > 1)
+ goto out;
+
clk_writel(PERIPH_CLK_TO_ENB_BIT(c),
CLK_OUT_ENB_SET + PERIPH_CLK_TO_ENB_SET_REG(c));
if (!(c->flags & PERIPH_NO_RESET) && !(c->flags & PERIPH_MANUAL_RESET))
val |= 0x3 << 24;
clk_writel(val, c->reg);
}
+
+out:
+ spin_unlock_irqrestore(&clock_register_lock, flags);
+
return 0;
}
static void tegra2_periph_clk_disable(struct clk *c)
{
+ unsigned long flags;
+
pr_debug("%s on clock %s\n", __func__, c->name);
- clk_writel(PERIPH_CLK_TO_ENB_BIT(c),
- CLK_OUT_ENB_CLR + PERIPH_CLK_TO_ENB_SET_REG(c));
+ if (!c->u.periph.clk_num)
+ return;
+
+ spin_lock_irqsave(&clock_register_lock, flags);
+
+ if (c->refcnt)
+ tegra_periph_clk_enable_refcount[c->u.periph.clk_num]--;
+
+ if (tegra_periph_clk_enable_refcount[c->u.periph.clk_num] == 0)
+ clk_writel(PERIPH_CLK_TO_ENB_BIT(c),
+ CLK_OUT_ENB_CLR + PERIPH_CLK_TO_ENB_SET_REG(c));
+
+ spin_unlock_irqrestore(&clock_register_lock, flags);
}
static void tegra2_periph_clk_reset(struct clk *c, bool assert)
pr_debug("%s %s on clock %s\n", __func__,
assert ? "assert" : "deassert", c->name);
+
+ BUG_ON(!c->u.periph.clk_num);
+
if (!(c->flags & PERIPH_NO_RESET))
clk_writel(PERIPH_CLK_TO_ENB_BIT(c),
base + PERIPH_CLK_TO_ENB_SET_REG(c));
if (divider < 0)
return divider;
- return parent_rate * 2 / (divider + 2);
+ return DIV_ROUND_UP(parent_rate * 2, divider + 2);
} else if (c->flags & DIV_U16) {
divider = clk_div16_get_divider(parent_rate, rate);
if (divider < 0)
return divider;
- return parent_rate / (divider + 1);
+ return DIV_ROUND_UP(parent_rate, divider + 1);
}
return -EINVAL;
}
c->mul = 2;
c->div = 1;
c->state = ON;
+
+ if (!c->u.periph.clk_num)
+ return;
+
if (!(clk_readl(CLK_OUT_ENB + PERIPH_CLK_TO_ENB_REG(c)) &
PERIPH_CLK_TO_ENB_BIT(c)))
c->state = OFF;
/* We could un-tristate the cdev1 or cdev2 pingroup here; this is
* currently done in the pinmux code. */
c->state = ON;
+
+ BUG_ON(!c->u.periph.clk_num);
+
if (!(clk_readl(CLK_OUT_ENB + PERIPH_CLK_TO_ENB_REG(c)) &
PERIPH_CLK_TO_ENB_BIT(c)))
c->state = OFF;
static int tegra2_cdev_clk_enable(struct clk *c)
{
+ BUG_ON(!c->u.periph.clk_num);
+
clk_writel(PERIPH_CLK_TO_ENB_BIT(c),
CLK_OUT_ENB_SET + PERIPH_CLK_TO_ENB_SET_REG(c));
return 0;
static void tegra2_cdev_clk_disable(struct clk *c)
{
+ BUG_ON(!c->u.periph.clk_num);
+
clk_writel(PERIPH_CLK_TO_ENB_BIT(c),
CLK_OUT_ENB_CLR + PERIPH_CLK_TO_ENB_SET_REG(c));
}
};
/* dap_mclk1, belongs to the cdev1 pingroup. */
-static struct clk tegra_dev1_clk = {
- .name = "clk_dev1",
+static struct clk tegra_clk_cdev1 = {
+ .name = "cdev1",
.ops = &tegra_cdev_clk_ops,
.rate = 26000000,
.max_rate = 26000000,
};
/* dap_mclk2, belongs to the cdev2 pingroup. */
-static struct clk tegra_dev2_clk = {
- .name = "clk_dev2",
+static struct clk tegra_clk_cdev2 = {
+ .name = "cdev2",
.ops = &tegra_cdev_clk_ops,
.rate = 26000000,
.max_rate = 26000000,
PERIPH_CLK("apbdma", "tegra-dma", NULL, 34, 0, 108000000, mux_pclk, 0),
PERIPH_CLK("rtc", "rtc-tegra", NULL, 4, 0, 32768, mux_clk_32k, PERIPH_NO_RESET),
PERIPH_CLK("timer", "timer", NULL, 5, 0, 26000000, mux_clk_m, 0),
- PERIPH_CLK("i2s1", "i2s.0", NULL, 11, 0x100, 26000000, mux_pllaout0_audio2x_pllp_clkm, MUX | DIV_U71),
- PERIPH_CLK("i2s2", "i2s.1", NULL, 18, 0x104, 26000000, mux_pllaout0_audio2x_pllp_clkm, MUX | DIV_U71),
- /* FIXME: spdif has 2 clocks but 1 enable */
+ PERIPH_CLK("i2s1", "tegra-i2s.0", NULL, 11, 0x100, 26000000, mux_pllaout0_audio2x_pllp_clkm, MUX | DIV_U71),
+ PERIPH_CLK("i2s2", "tegra-i2s.1", NULL, 18, 0x104, 26000000, mux_pllaout0_audio2x_pllp_clkm, MUX | DIV_U71),
PERIPH_CLK("spdif_out", "spdif_out", NULL, 10, 0x108, 100000000, mux_pllaout0_audio2x_pllp_clkm, MUX | DIV_U71),
PERIPH_CLK("spdif_in", "spdif_in", NULL, 10, 0x10c, 100000000, mux_pllp_pllc_pllm, MUX | DIV_U71),
PERIPH_CLK("pwm", "pwm", NULL, 17, 0x110, 432000000, mux_pllp_pllc_audio_clkm_clk32, MUX | DIV_U71),
PERIPH_CLK("sbc4", "spi_tegra.3", NULL, 68, 0x1b4, 160000000, mux_pllp_pllc_pllm_clkm, MUX | DIV_U71),
PERIPH_CLK("ide", "ide", NULL, 25, 0x144, 100000000, mux_pllp_pllc_pllm_clkm, MUX | DIV_U71), /* requires min voltage */
PERIPH_CLK("ndflash", "tegra_nand", NULL, 13, 0x160, 164000000, mux_pllp_pllc_pllm_clkm, MUX | DIV_U71), /* scales with voltage */
- /* FIXME: vfir shares an enable with uartb */
PERIPH_CLK("vfir", "vfir", NULL, 7, 0x168, 72000000, mux_pllp_pllc_pllm_clkm, MUX | DIV_U71),
PERIPH_CLK("sdmmc1", "sdhci-tegra.0", NULL, 14, 0x150, 52000000, mux_pllp_pllc_pllm_clkm, MUX | DIV_U71), /* scales with voltage */
PERIPH_CLK("sdmmc2", "sdhci-tegra.1", NULL, 9, 0x154, 52000000, mux_pllp_pllc_pllm_clkm, MUX | DIV_U71), /* scales with voltage */
PERIPH_CLK("uarte", "uart.4", NULL, 66, 0x1c4, 600000000, mux_pllp_pllc_pllm_clkm, MUX),
PERIPH_CLK("3d", "3d", NULL, 24, 0x158, 300000000, mux_pllm_pllc_pllp_plla, MUX | DIV_U71 | PERIPH_MANUAL_RESET), /* scales with voltage and process_id */
PERIPH_CLK("2d", "2d", NULL, 21, 0x15c, 300000000, mux_pllm_pllc_pllp_plla, MUX | DIV_U71), /* scales with voltage and process_id */
- /* FIXME: vi and vi_sensor share an enable */
PERIPH_CLK("vi", "tegra_camera", "vi", 20, 0x148, 150000000, mux_pllm_pllc_pllp_plla, MUX | DIV_U71), /* scales with voltage and process_id */
PERIPH_CLK("vi_sensor", "tegra_camera", "vi_sensor", 20, 0x1a8, 150000000, mux_pllm_pllc_pllp_plla, MUX | DIV_U71 | PERIPH_NO_RESET), /* scales with voltage and process_id */
PERIPH_CLK("epp", "epp", NULL, 19, 0x16c, 300000000, mux_pllm_pllc_pllp_plla, MUX | DIV_U71), /* scales with voltage and process_id */
PERIPH_CLK("mpe", "mpe", NULL, 60, 0x170, 250000000, mux_pllm_pllc_pllp_plla, MUX | DIV_U71), /* scales with voltage and process_id */
PERIPH_CLK("host1x", "host1x", NULL, 28, 0x180, 166000000, mux_pllm_pllc_pllp_plla, MUX | DIV_U71), /* scales with voltage and process_id */
- /* FIXME: cve and tvo share an enable */
PERIPH_CLK("cve", "cve", NULL, 49, 0x140, 250000000, mux_pllp_plld_pllc_clkm, MUX | DIV_U71), /* requires min voltage */
PERIPH_CLK("tvo", "tvo", NULL, 49, 0x188, 250000000, mux_pllp_plld_pllc_clkm, MUX | DIV_U71), /* requires min voltage */
PERIPH_CLK("hdmi", "hdmi", NULL, 51, 0x18c, 600000000, mux_pllp_plld_pllc_clkm, MUX | DIV_U71), /* requires min voltage */
&tegra_clk_hclk,
&tegra_clk_pclk,
&tegra_clk_d,
- &tegra_dev1_clk,
- &tegra_dev2_clk,
+ &tegra_clk_cdev1,
+ &tegra_clk_cdev2,
&tegra_clk_virtual_cpu,
&tegra_clk_blink,
&tegra_clk_cop,
git.openpandora.org / pandora-kernel.git / blobdiff