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-rw-r--r--arch/arm/mach-davinci/da850.c298
1 files changed, 276 insertions, 22 deletions
diff --git a/arch/arm/mach-davinci/da850.c b/arch/arm/mach-davinci/da850.c
index 192d719a47df..717806c6cef9 100644
--- a/arch/arm/mach-davinci/da850.c
+++ b/arch/arm/mach-davinci/da850.c
@@ -11,31 +11,41 @@
* is licensed "as is" without any warranty of any kind, whether express
* or implied.
*/
-#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/clk.h>
#include <linux/platform_device.h>
+#include <linux/cpufreq.h>
+#include <linux/regulator/consumer.h>
#include <asm/mach/map.h>
-#include <mach/clock.h>
#include <mach/psc.h>
-#include <mach/mux.h>
#include <mach/irqs.h>
#include <mach/cputype.h>
#include <mach/common.h>
#include <mach/time.h>
#include <mach/da8xx.h>
+#include <mach/cpufreq.h>
#include "clock.h"
#include "mux.h"
+/* SoC specific clock flags */
+#define DA850_CLK_ASYNC3 BIT(16)
+
#define DA850_PLL1_BASE 0x01e1a000
#define DA850_TIMER64P2_BASE 0x01f0c000
#define DA850_TIMER64P3_BASE 0x01f0d000
#define DA850_REF_FREQ 24000000
+#define CFGCHIP3_ASYNC3_CLKSRC BIT(4)
+#define CFGCHIP0_PLL_MASTER_LOCK BIT(4)
+
+static int da850_set_armrate(struct clk *clk, unsigned long rate);
+static int da850_round_armrate(struct clk *clk, unsigned long rate);
+static int da850_set_pll0rate(struct clk *clk, unsigned long armrate);
+
static struct pll_data pll0_data = {
.num = 1,
.phys_base = DA8XX_PLL0_BASE,
@@ -52,6 +62,7 @@ static struct clk pll0_clk = {
.parent = &ref_clk,
.pll_data = &pll0_data,
.flags = CLK_PLL,
+ .set_rate = da850_set_pll0rate,
};
static struct clk pll0_aux_clk = {
@@ -210,16 +221,16 @@ static struct clk tpcc1_clk = {
.name = "tpcc1",
.parent = &pll0_sysclk2,
.lpsc = DA850_LPSC1_TPCC1,
+ .gpsc = 1,
.flags = CLK_PSC | ALWAYS_ENABLED,
- .psc_ctlr = 1,
};
static struct clk tptc2_clk = {
.name = "tptc2",
.parent = &pll0_sysclk2,
.lpsc = DA850_LPSC1_TPTC2,
+ .gpsc = 1,
.flags = ALWAYS_ENABLED,
- .psc_ctlr = 1,
};
static struct clk uart0_clk = {
@@ -232,14 +243,16 @@ static struct clk uart1_clk = {
.name = "uart1",
.parent = &pll0_sysclk2,
.lpsc = DA8XX_LPSC1_UART1,
- .psc_ctlr = 1,
+ .gpsc = 1,
+ .flags = DA850_CLK_ASYNC3,
};
static struct clk uart2_clk = {
.name = "uart2",
.parent = &pll0_sysclk2,
.lpsc = DA8XX_LPSC1_UART2,
- .psc_ctlr = 1,
+ .gpsc = 1,
+ .flags = DA850_CLK_ASYNC3,
};
static struct clk aintc_clk = {
@@ -253,22 +266,22 @@ static struct clk gpio_clk = {
.name = "gpio",
.parent = &pll0_sysclk4,
.lpsc = DA8XX_LPSC1_GPIO,
- .psc_ctlr = 1,
+ .gpsc = 1,
};
static struct clk i2c1_clk = {
.name = "i2c1",
.parent = &pll0_sysclk4,
.lpsc = DA8XX_LPSC1_I2C,
- .psc_ctlr = 1,
+ .gpsc = 1,
};
static struct clk emif3_clk = {
.name = "emif3",
.parent = &pll0_sysclk5,
.lpsc = DA8XX_LPSC1_EMIF3C,
+ .gpsc = 1,
.flags = ALWAYS_ENABLED,
- .psc_ctlr = 1,
};
static struct clk arm_clk = {
@@ -276,6 +289,8 @@ static struct clk arm_clk = {
.parent = &pll0_sysclk6,
.lpsc = DA8XX_LPSC0_ARM,
.flags = ALWAYS_ENABLED,
+ .set_rate = da850_set_armrate,
+ .round_rate = da850_round_armrate,
};
static struct clk rmii_clk = {
@@ -287,21 +302,22 @@ static struct clk emac_clk = {
.name = "emac",
.parent = &pll0_sysclk4,
.lpsc = DA8XX_LPSC1_CPGMAC,
- .psc_ctlr = 1,
+ .gpsc = 1,
};
static struct clk mcasp_clk = {
.name = "mcasp",
.parent = &pll0_sysclk2,
.lpsc = DA8XX_LPSC1_McASP0,
- .psc_ctlr = 1,
+ .gpsc = 1,
+ .flags = DA850_CLK_ASYNC3,
};
static struct clk lcdc_clk = {
.name = "lcdc",
.parent = &pll0_sysclk2,
.lpsc = DA8XX_LPSC1_LCDC,
- .psc_ctlr = 1,
+ .gpsc = 1,
};
static struct clk mmcsd_clk = {
@@ -404,6 +420,14 @@ static const struct mux_config da850_pins[] = {
MUX_CFG(DA850, MII_RXD_0, 3, 28, 15, 8, false)
MUX_CFG(DA850, MDIO_CLK, 4, 0, 15, 8, false)
MUX_CFG(DA850, MDIO_D, 4, 4, 15, 8, false)
+ MUX_CFG(DA850, RMII_TXD_0, 14, 12, 15, 8, false)
+ MUX_CFG(DA850, RMII_TXD_1, 14, 8, 15, 8, false)
+ MUX_CFG(DA850, RMII_TXEN, 14, 16, 15, 8, false)
+ MUX_CFG(DA850, RMII_CRS_DV, 15, 4, 15, 8, false)
+ MUX_CFG(DA850, RMII_RXD_0, 14, 24, 15, 8, false)
+ MUX_CFG(DA850, RMII_RXD_1, 14, 20, 15, 8, false)
+ MUX_CFG(DA850, RMII_RXER, 14, 28, 15, 8, false)
+ MUX_CFG(DA850, RMII_MHZ_50_CLK, 15, 0, 15, 0, false)
/* McASP function */
MUX_CFG(DA850, ACLKR, 0, 0, 15, 1, false)
MUX_CFG(DA850, ACLKX, 0, 4, 15, 1, false)
@@ -506,8 +530,9 @@ static const struct mux_config da850_pins[] = {
MUX_CFG(DA850, EMA_WAIT_1, 6, 24, 15, 1, false)
MUX_CFG(DA850, NEMA_CS_2, 7, 0, 15, 1, false)
/* GPIO function */
+ MUX_CFG(DA850, GPIO2_6, 6, 4, 15, 8, false)
+ MUX_CFG(DA850, GPIO2_8, 5, 28, 15, 8, false)
MUX_CFG(DA850, GPIO2_15, 5, 0, 15, 8, false)
- MUX_CFG(DA850, GPIO8_10, 18, 28, 15, 8, false)
MUX_CFG(DA850, GPIO4_0, 10, 28, 15, 8, false)
MUX_CFG(DA850, GPIO4_1, 10, 24, 15, 8, false)
#endif
@@ -547,6 +572,14 @@ const short da850_cpgmac_pins[] __initdata = {
-1
};
+const short da850_rmii_pins[] __initdata = {
+ DA850_RMII_TXD_0, DA850_RMII_TXD_1, DA850_RMII_TXEN,
+ DA850_RMII_CRS_DV, DA850_RMII_RXD_0, DA850_RMII_RXD_1,
+ DA850_RMII_RXER, DA850_RMII_MHZ_50_CLK, DA850_MDIO_CLK,
+ DA850_MDIO_D,
+ -1
+};
+
const short da850_mcasp_pins[] __initdata = {
DA850_AHCLKX, DA850_ACLKX, DA850_AFSX,
DA850_AHCLKR, DA850_ACLKR, DA850_AFSR, DA850_AMUTE,
@@ -555,12 +588,11 @@ const short da850_mcasp_pins[] __initdata = {
};
const short da850_lcdcntl_pins[] __initdata = {
- DA850_LCD_D_1, DA850_LCD_D_2, DA850_LCD_D_3, DA850_LCD_D_4,
- DA850_LCD_D_5, DA850_LCD_D_6, DA850_LCD_D_7, DA850_LCD_D_8,
- DA850_LCD_D_9, DA850_LCD_D_10, DA850_LCD_D_11, DA850_LCD_D_12,
- DA850_LCD_D_13, DA850_LCD_D_14, DA850_LCD_D_15, DA850_LCD_PCLK,
- DA850_LCD_HSYNC, DA850_LCD_VSYNC, DA850_NLCD_AC_ENB_CS, DA850_GPIO2_15,
- DA850_GPIO8_10,
+ DA850_LCD_D_0, DA850_LCD_D_1, DA850_LCD_D_2, DA850_LCD_D_3,
+ DA850_LCD_D_4, DA850_LCD_D_5, DA850_LCD_D_6, DA850_LCD_D_7,
+ DA850_LCD_D_8, DA850_LCD_D_9, DA850_LCD_D_10, DA850_LCD_D_11,
+ DA850_LCD_D_12, DA850_LCD_D_13, DA850_LCD_D_14, DA850_LCD_D_15,
+ DA850_LCD_PCLK, DA850_LCD_HSYNC, DA850_LCD_VSYNC, DA850_NLCD_AC_ENB_CS,
-1
};
@@ -790,16 +822,221 @@ static struct davinci_timer_info da850_timer_info = {
.clocksource_id = T0_TOP,
};
+static void da850_set_async3_src(int pllnum)
+{
+ struct clk *clk, *newparent = pllnum ? &pll1_sysclk2 : &pll0_sysclk2;
+ struct davinci_clk *c;
+ unsigned int v;
+ int ret;
+
+ for (c = da850_clks; c->lk.clk; c++) {
+ clk = c->lk.clk;
+ if (clk->flags & DA850_CLK_ASYNC3) {
+ ret = clk_set_parent(clk, newparent);
+ WARN(ret, "DA850: unable to re-parent clock %s",
+ clk->name);
+ }
+ }
+
+ v = __raw_readl(DA8XX_SYSCFG_VIRT(DA8XX_CFGCHIP3_REG));
+ if (pllnum)
+ v |= CFGCHIP3_ASYNC3_CLKSRC;
+ else
+ v &= ~CFGCHIP3_ASYNC3_CLKSRC;
+ __raw_writel(v, DA8XX_SYSCFG_VIRT(DA8XX_CFGCHIP3_REG));
+}
+
+#ifdef CONFIG_CPU_FREQ
+/*
+ * Notes:
+ * According to the TRM, minimum PLLM results in maximum power savings.
+ * The OPP definitions below should keep the PLLM as low as possible.
+ *
+ * The output of the PLLM must be between 400 to 600 MHz.
+ * This rules out prediv of anything but divide-by-one for 24Mhz OSC input.
+ */
+struct da850_opp {
+ unsigned int freq; /* in KHz */
+ unsigned int prediv;
+ unsigned int mult;
+ unsigned int postdiv;
+ unsigned int cvdd_min; /* in uV */
+ unsigned int cvdd_max; /* in uV */
+};
+
+static const struct da850_opp da850_opp_300 = {
+ .freq = 300000,
+ .prediv = 1,
+ .mult = 25,
+ .postdiv = 2,
+ .cvdd_min = 1140000,
+ .cvdd_max = 1320000,
+};
+
+static const struct da850_opp da850_opp_200 = {
+ .freq = 200000,
+ .prediv = 1,
+ .mult = 25,
+ .postdiv = 3,
+ .cvdd_min = 1050000,
+ .cvdd_max = 1160000,
+};
+
+static const struct da850_opp da850_opp_96 = {
+ .freq = 96000,
+ .prediv = 1,
+ .mult = 20,
+ .postdiv = 5,
+ .cvdd_min = 950000,
+ .cvdd_max = 1050000,
+};
+
+#define OPP(freq) \
+ { \
+ .index = (unsigned int) &da850_opp_##freq, \
+ .frequency = freq * 1000, \
+ }
+
+static struct cpufreq_frequency_table da850_freq_table[] = {
+ OPP(300),
+ OPP(200),
+ OPP(96),
+ {
+ .index = 0,
+ .frequency = CPUFREQ_TABLE_END,
+ },
+};
+
+#ifdef CONFIG_REGULATOR
+static struct regulator *cvdd;
+
+static int da850_set_voltage(unsigned int index)
+{
+ struct da850_opp *opp;
+
+ if (!cvdd)
+ return -ENODEV;
+
+ opp = (struct da850_opp *) da850_freq_table[index].index;
+
+ return regulator_set_voltage(cvdd, opp->cvdd_min, opp->cvdd_max);
+}
+
+static int da850_regulator_init(void)
+{
+ cvdd = regulator_get(NULL, "cvdd");
+ if (WARN(IS_ERR(cvdd), "Unable to obtain voltage regulator for CVDD;"
+ " voltage scaling unsupported\n")) {
+ return PTR_ERR(cvdd);
+ }
+
+ return 0;
+}
+#endif
+
+static struct davinci_cpufreq_config cpufreq_info = {
+ .freq_table = &da850_freq_table[0],
+#ifdef CONFIG_REGULATOR
+ .init = da850_regulator_init,
+ .set_voltage = da850_set_voltage,
+#endif
+};
+
+static struct platform_device da850_cpufreq_device = {
+ .name = "cpufreq-davinci",
+ .dev = {
+ .platform_data = &cpufreq_info,
+ },
+};
+
+int __init da850_register_cpufreq(void)
+{
+ return platform_device_register(&da850_cpufreq_device);
+}
+
+static int da850_round_armrate(struct clk *clk, unsigned long rate)
+{
+ int i, ret = 0, diff;
+ unsigned int best = (unsigned int) -1;
+
+ rate /= 1000; /* convert to kHz */
+
+ for (i = 0; da850_freq_table[i].frequency != CPUFREQ_TABLE_END; i++) {
+ diff = da850_freq_table[i].frequency - rate;
+ if (diff < 0)
+ diff = -diff;
+
+ if (diff < best) {
+ best = diff;
+ ret = da850_freq_table[i].frequency;
+ }
+ }
+
+ return ret * 1000;
+}
+
+static int da850_set_armrate(struct clk *clk, unsigned long index)
+{
+ struct clk *pllclk = &pll0_clk;
+
+ return clk_set_rate(pllclk, index);
+}
+
+static int da850_set_pll0rate(struct clk *clk, unsigned long index)
+{
+ unsigned int prediv, mult, postdiv;
+ struct da850_opp *opp;
+ struct pll_data *pll = clk->pll_data;
+ unsigned int v;
+ int ret;
+
+ opp = (struct da850_opp *) da850_freq_table[index].index;
+ prediv = opp->prediv;
+ mult = opp->mult;
+ postdiv = opp->postdiv;
+
+ /* Unlock writing to PLL registers */
+ v = __raw_readl(DA8XX_SYSCFG_VIRT(DA8XX_CFGCHIP0_REG));
+ v &= ~CFGCHIP0_PLL_MASTER_LOCK;
+ __raw_writel(v, DA8XX_SYSCFG_VIRT(DA8XX_CFGCHIP0_REG));
+
+ ret = davinci_set_pllrate(pll, prediv, mult, postdiv);
+ if (WARN_ON(ret))
+ return ret;
+
+ return 0;
+}
+#else
+int __init da850_register_cpufreq(void)
+{
+ return 0;
+}
+
+static int da850_set_armrate(struct clk *clk, unsigned long rate)
+{
+ return -EINVAL;
+}
+
+static int da850_set_pll0rate(struct clk *clk, unsigned long armrate)
+{
+ return -EINVAL;
+}
+
+static int da850_round_armrate(struct clk *clk, unsigned long rate)
+{
+ return clk->rate;
+}
+#endif
+
+
static struct davinci_soc_info davinci_soc_info_da850 = {
.io_desc = da850_io_desc,
.io_desc_num = ARRAY_SIZE(da850_io_desc),
- .jtag_id_base = IO_ADDRESS(DA8XX_JTAG_ID_REG),
.ids = da850_ids,
.ids_num = ARRAY_SIZE(da850_ids),
.cpu_clks = da850_clks,
.psc_bases = da850_psc_bases,
.psc_bases_num = ARRAY_SIZE(da850_psc_bases),
- .pinmux_base = IO_ADDRESS(DA8XX_BOOT_CFG_BASE + 0x120),
.pinmux_pins = da850_pins,
.pinmux_pins_num = ARRAY_SIZE(da850_pins),
.intc_base = (void __iomem *)DA8XX_CP_INTC_VIRT,
@@ -816,5 +1053,22 @@ static struct davinci_soc_info davinci_soc_info_da850 = {
void __init da850_init(void)
{
+ da8xx_syscfg_base = ioremap(DA8XX_SYSCFG_BASE, SZ_4K);
+ if (WARN(!da8xx_syscfg_base, "Unable to map syscfg module"))
+ return;
+
+ davinci_soc_info_da850.jtag_id_base =
+ DA8XX_SYSCFG_VIRT(DA8XX_JTAG_ID_REG);
+ davinci_soc_info_da850.pinmux_base = DA8XX_SYSCFG_VIRT(0x120);
+
davinci_common_init(&davinci_soc_info_da850);
+
+ /*
+ * Move the clock source of Async3 domain to PLL1 SYSCLK2.
+ * This helps keeping the peripherals on this domain insulated
+ * from CPU frequency changes caused by DVFS. The firmware sets
+ * both PLL0 and PLL1 to the same frequency so, there should not
+ * be any noticible change even in non-DVFS use cases.
+ */
+ da850_set_async3_src(1);
}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.