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path: root/drivers/mfd/db8500-prcmu.c
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Diffstat (limited to 'drivers/mfd/db8500-prcmu.c')
-rw-r--r--drivers/mfd/db8500-prcmu.c316
1 files changed, 152 insertions, 164 deletions
diff --git a/drivers/mfd/db8500-prcmu.c b/drivers/mfd/db8500-prcmu.c
index 21f261bf9e9..21434beb420 100644
--- a/drivers/mfd/db8500-prcmu.c
+++ b/drivers/mfd/db8500-prcmu.c
@@ -26,7 +26,6 @@
#include <linux/fs.h>
#include <linux/platform_device.h>
#include <linux/uaccess.h>
-#include <linux/irqchip/arm-gic.h>
#include <linux/mfd/core.h>
#include <linux/mfd/dbx500-prcmu.h>
#include <linux/mfd/abx500/ab8500.h>
@@ -34,9 +33,7 @@
#include <linux/regulator/machine.h>
#include <linux/cpufreq.h>
#include <linux/platform_data/ux500_wdt.h>
-#include <mach/hardware.h>
-#include <mach/irqs.h>
-#include <mach/db8500-regs.h>
+#include <linux/platform_data/db8500_thermal.h>
#include "dbx500-prcmu-regs.h"
/* Index of different voltages to be used when accessing AVSData */
@@ -276,8 +273,34 @@ static struct irq_domain *db8500_irq_domain;
* the bits in the bit field are not. (The bits also have a tendency to move
* around, to further complicate matters.)
*/
-#define IRQ_INDEX(_name) ((IRQ_PRCMU_##_name) - IRQ_PRCMU_BASE)
+#define IRQ_INDEX(_name) ((IRQ_PRCMU_##_name))
#define IRQ_ENTRY(_name)[IRQ_INDEX(_name)] = (WAKEUP_BIT_##_name)
+
+#define IRQ_PRCMU_RTC 0
+#define IRQ_PRCMU_RTT0 1
+#define IRQ_PRCMU_RTT1 2
+#define IRQ_PRCMU_HSI0 3
+#define IRQ_PRCMU_HSI1 4
+#define IRQ_PRCMU_CA_WAKE 5
+#define IRQ_PRCMU_USB 6
+#define IRQ_PRCMU_ABB 7
+#define IRQ_PRCMU_ABB_FIFO 8
+#define IRQ_PRCMU_ARM 9
+#define IRQ_PRCMU_MODEM_SW_RESET_REQ 10
+#define IRQ_PRCMU_GPIO0 11
+#define IRQ_PRCMU_GPIO1 12
+#define IRQ_PRCMU_GPIO2 13
+#define IRQ_PRCMU_GPIO3 14
+#define IRQ_PRCMU_GPIO4 15
+#define IRQ_PRCMU_GPIO5 16
+#define IRQ_PRCMU_GPIO6 17
+#define IRQ_PRCMU_GPIO7 18
+#define IRQ_PRCMU_GPIO8 19
+#define IRQ_PRCMU_CA_SLEEP 20
+#define IRQ_PRCMU_HOTMON_LOW 21
+#define IRQ_PRCMU_HOTMON_HIGH 22
+#define NUM_PRCMU_WAKEUPS 23
+
static u32 prcmu_irq_bit[NUM_PRCMU_WAKEUPS] = {
IRQ_ENTRY(RTC),
IRQ_ENTRY(RTT0),
@@ -422,9 +445,10 @@ static DEFINE_SPINLOCK(clkout_lock);
/* Global var to runtime determine TCDM base for v2 or v1 */
static __iomem void *tcdm_base;
+static __iomem void *prcmu_base;
struct clk_mgt {
- void __iomem *reg;
+ u32 offset;
u32 pllsw;
int branch;
bool clk38div;
@@ -599,9 +623,9 @@ int db8500_prcmu_set_display_clocks(void)
while ((readl(PRCM_SEM) & PRCM_SEM_PRCM_SEM) != 0)
cpu_relax();
- writel(PRCMU_DSI_CLOCK_SETTING, PRCM_HDMICLK_MGT);
- writel(PRCMU_DSI_LP_CLOCK_SETTING, PRCM_TVCLK_MGT);
- writel(PRCMU_DPI_CLOCK_SETTING, PRCM_LCDCLK_MGT);
+ writel(PRCMU_DSI_CLOCK_SETTING, prcmu_base + PRCM_HDMICLK_MGT);
+ writel(PRCMU_DSI_LP_CLOCK_SETTING, prcmu_base + PRCM_TVCLK_MGT);
+ writel(PRCMU_DPI_CLOCK_SETTING, prcmu_base + PRCM_LCDCLK_MGT);
/* Release the HW semaphore. */
writel(0, PRCM_SEM);
@@ -613,7 +637,7 @@ int db8500_prcmu_set_display_clocks(void)
u32 db8500_prcmu_read(unsigned int reg)
{
- return readl(_PRCMU_BASE + reg);
+ return readl(prcmu_base + reg);
}
void db8500_prcmu_write(unsigned int reg, u32 value)
@@ -621,7 +645,7 @@ void db8500_prcmu_write(unsigned int reg, u32 value)
unsigned long flags;
spin_lock_irqsave(&prcmu_lock, flags);
- writel(value, (_PRCMU_BASE + reg));
+ writel(value, (prcmu_base + reg));
spin_unlock_irqrestore(&prcmu_lock, flags);
}
@@ -631,9 +655,9 @@ void db8500_prcmu_write_masked(unsigned int reg, u32 mask, u32 value)
unsigned long flags;
spin_lock_irqsave(&prcmu_lock, flags);
- val = readl(_PRCMU_BASE + reg);
+ val = readl(prcmu_base + reg);
val = ((val & ~mask) | (value & mask));
- writel(val, (_PRCMU_BASE + reg));
+ writel(val, (prcmu_base + reg));
spin_unlock_irqrestore(&prcmu_lock, flags);
}
@@ -793,119 +817,6 @@ u8 db8500_prcmu_get_power_state_result(void)
return readb(tcdm_base + PRCM_ACK_MB0_AP_PWRSTTR_STATUS);
}
-/* This function decouple the gic from the prcmu */
-int db8500_prcmu_gic_decouple(void)
-{
- u32 val = readl(PRCM_A9_MASK_REQ);
-
- /* Set bit 0 register value to 1 */
- writel(val | PRCM_A9_MASK_REQ_PRCM_A9_MASK_REQ,
- PRCM_A9_MASK_REQ);
-
- /* Make sure the register is updated */
- readl(PRCM_A9_MASK_REQ);
-
- /* Wait a few cycles for the gic mask completion */
- udelay(1);
-
- return 0;
-}
-
-/* This function recouple the gic with the prcmu */
-int db8500_prcmu_gic_recouple(void)
-{
- u32 val = readl(PRCM_A9_MASK_REQ);
-
- /* Set bit 0 register value to 0 */
- writel(val & ~PRCM_A9_MASK_REQ_PRCM_A9_MASK_REQ, PRCM_A9_MASK_REQ);
-
- return 0;
-}
-
-#define PRCMU_GIC_NUMBER_REGS 5
-
-/*
- * This function checks if there are pending irq on the gic. It only
- * makes sense if the gic has been decoupled before with the
- * db8500_prcmu_gic_decouple function. Disabling an interrupt only
- * disables the forwarding of the interrupt to any CPU interface. It
- * does not prevent the interrupt from changing state, for example
- * becoming pending, or active and pending if it is already
- * active. Hence, we have to check the interrupt is pending *and* is
- * active.
- */
-bool db8500_prcmu_gic_pending_irq(void)
-{
- u32 pr; /* Pending register */
- u32 er; /* Enable register */
- void __iomem *dist_base = __io_address(U8500_GIC_DIST_BASE);
- int i;
-
- /* 5 registers. STI & PPI not skipped */
- for (i = 0; i < PRCMU_GIC_NUMBER_REGS; i++) {
-
- pr = readl_relaxed(dist_base + GIC_DIST_PENDING_SET + i * 4);
- er = readl_relaxed(dist_base + GIC_DIST_ENABLE_SET + i * 4);
-
- if (pr & er)
- return true; /* There is a pending interrupt */
- }
-
- return false;
-}
-
-/*
- * This function checks if there are pending interrupt on the
- * prcmu which has been delegated to monitor the irqs with the
- * db8500_prcmu_copy_gic_settings function.
- */
-bool db8500_prcmu_pending_irq(void)
-{
- u32 it, im;
- int i;
-
- for (i = 0; i < PRCMU_GIC_NUMBER_REGS - 1; i++) {
- it = readl(PRCM_ARMITVAL31TO0 + i * 4);
- im = readl(PRCM_ARMITMSK31TO0 + i * 4);
- if (it & im)
- return true; /* There is a pending interrupt */
- }
-
- return false;
-}
-
-/*
- * This function checks if the specified cpu is in in WFI. It's usage
- * makes sense only if the gic is decoupled with the db8500_prcmu_gic_decouple
- * function. Of course passing smp_processor_id() to this function will
- * always return false...
- */
-bool db8500_prcmu_is_cpu_in_wfi(int cpu)
-{
- return readl(PRCM_ARM_WFI_STANDBY) & cpu ? PRCM_ARM_WFI_STANDBY_WFI1 :
- PRCM_ARM_WFI_STANDBY_WFI0;
-}
-
-/*
- * This function copies the gic SPI settings to the prcmu in order to
- * monitor them and abort/finish the retention/off sequence or state.
- */
-int db8500_prcmu_copy_gic_settings(void)
-{
- u32 er; /* Enable register */
- void __iomem *dist_base = __io_address(U8500_GIC_DIST_BASE);
- int i;
-
- /* We skip the STI and PPI */
- for (i = 0; i < PRCMU_GIC_NUMBER_REGS - 1; i++) {
- er = readl_relaxed(dist_base +
- GIC_DIST_ENABLE_SET + (i + 1) * 4);
- writel(er, PRCM_ARMITMSK31TO0 + i * 4);
- }
-
- return 0;
-}
-
/* This function should only be called while mb0_transfer.lock is held. */
static void config_wakeups(void)
{
@@ -1059,7 +970,7 @@ int db8500_prcmu_set_ddr_opp(u8 opp)
/* Divide the frequency of certain clocks by 2 for APE_50_PARTLY_25_OPP. */
static void request_even_slower_clocks(bool enable)
{
- void __iomem *clock_reg[] = {
+ u32 clock_reg[] = {
PRCM_ACLK_MGT,
PRCM_DMACLK_MGT
};
@@ -1076,7 +987,7 @@ static void request_even_slower_clocks(bool enable)
u32 val;
u32 div;
- val = readl(clock_reg[i]);
+ val = readl(prcmu_base + clock_reg[i]);
div = (val & PRCM_CLK_MGT_CLKPLLDIV_MASK);
if (enable) {
if ((div <= 1) || (div > 15)) {
@@ -1092,7 +1003,7 @@ static void request_even_slower_clocks(bool enable)
}
val = ((val & ~PRCM_CLK_MGT_CLKPLLDIV_MASK) |
(div & PRCM_CLK_MGT_CLKPLLDIV_MASK));
- writel(val, clock_reg[i]);
+ writel(val, prcmu_base + clock_reg[i]);
}
unlock_and_return:
@@ -1446,14 +1357,14 @@ static int request_clock(u8 clock, bool enable)
while ((readl(PRCM_SEM) & PRCM_SEM_PRCM_SEM) != 0)
cpu_relax();
- val = readl(clk_mgt[clock].reg);
+ val = readl(prcmu_base + clk_mgt[clock].offset);
if (enable) {
val |= (PRCM_CLK_MGT_CLKEN | clk_mgt[clock].pllsw);
} else {
clk_mgt[clock].pllsw = (val & PRCM_CLK_MGT_CLKPLLSW_MASK);
val &= ~(PRCM_CLK_MGT_CLKEN | PRCM_CLK_MGT_CLKPLLSW_MASK);
}
- writel(val, clk_mgt[clock].reg);
+ writel(val, prcmu_base + clk_mgt[clock].offset);
/* Release the HW semaphore. */
writel(0, PRCM_SEM);
@@ -1629,7 +1540,7 @@ static unsigned long clock_rate(u8 clock)
u32 pllsw;
unsigned long rate = ROOT_CLOCK_RATE;
- val = readl(clk_mgt[clock].reg);
+ val = readl(prcmu_base + clk_mgt[clock].offset);
if (val & PRCM_CLK_MGT_CLK38) {
if (clk_mgt[clock].clk38div && (val & PRCM_CLK_MGT_CLK38DIV))
@@ -1785,7 +1696,7 @@ static long round_clock_rate(u8 clock, unsigned long rate)
unsigned long src_rate;
long rounded_rate;
- val = readl(clk_mgt[clock].reg);
+ val = readl(prcmu_base + clk_mgt[clock].offset);
src_rate = clock_source_rate((val | clk_mgt[clock].pllsw),
clk_mgt[clock].branch);
div = clock_divider(src_rate, rate);
@@ -1933,7 +1844,7 @@ static void set_clock_rate(u8 clock, unsigned long rate)
while ((readl(PRCM_SEM) & PRCM_SEM_PRCM_SEM) != 0)
cpu_relax();
- val = readl(clk_mgt[clock].reg);
+ val = readl(prcmu_base + clk_mgt[clock].offset);
src_rate = clock_source_rate((val | clk_mgt[clock].pllsw),
clk_mgt[clock].branch);
div = clock_divider(src_rate, rate);
@@ -1961,7 +1872,7 @@ static void set_clock_rate(u8 clock, unsigned long rate)
val &= ~PRCM_CLK_MGT_CLKPLLDIV_MASK;
val |= min(div, (u32)31);
}
- writel(val, clk_mgt[clock].reg);
+ writel(val, prcmu_base + clk_mgt[clock].offset);
/* Release the HW semaphore. */
writel(0, PRCM_SEM);
@@ -2764,14 +2675,13 @@ static struct irq_domain_ops db8500_irq_ops = {
.xlate = irq_domain_xlate_twocell,
};
-static int db8500_irq_init(struct device_node *np)
+static int db8500_irq_init(struct device_node *np, int irq_base)
{
- int irq_base = 0;
int i;
/* In the device tree case, just take some IRQs */
- if (!np)
- irq_base = IRQ_PRCMU_BASE;
+ if (np)
+ irq_base = 0;
db8500_irq_domain = irq_domain_add_simple(
np, NUM_PRCMU_WAKEUPS, irq_base,
@@ -2825,8 +2735,19 @@ static void dbx500_fw_version_init(struct platform_device *pdev,
}
}
-void __init db8500_prcmu_early_init(void)
+void __init db8500_prcmu_early_init(u32 phy_base, u32 size)
{
+ /*
+ * This is a temporary remap to bring up the clocks. It is
+ * subsequently replaces with a real remap. After the merge of
+ * the mailbox subsystem all of this early code goes away, and the
+ * clock driver can probe independently. An early initcall will
+ * still be needed, but it can be diverted into drivers/clk/ux500.
+ */
+ prcmu_base = ioremap(phy_base, size);
+ if (!prcmu_base)
+ pr_err("%s: ioremap() of prcmu registers failed!\n", __func__);
+
spin_lock_init(&mb0_transfer.lock);
spin_lock_init(&mb0_transfer.dbb_irqs_lock);
mutex_init(&mb0_transfer.ac_wake_lock);
@@ -3092,18 +3013,57 @@ static struct regulator_init_data db8500_regulators[DB8500_NUM_REGULATORS] = {
},
};
-static struct resource ab8500_resources[] = {
- [0] = {
- .start = IRQ_DB8500_AB8500,
- .end = IRQ_DB8500_AB8500,
- .flags = IORESOURCE_IRQ
- }
-};
-
static struct ux500_wdt_data db8500_wdt_pdata = {
.timeout = 600, /* 10 minutes */
.has_28_bits_resolution = true,
};
+/*
+ * Thermal Sensor
+ */
+
+static struct resource db8500_thsens_resources[] = {
+ {
+ .name = "IRQ_HOTMON_LOW",
+ .start = IRQ_PRCMU_HOTMON_LOW,
+ .end = IRQ_PRCMU_HOTMON_LOW,
+ .flags = IORESOURCE_IRQ,
+ },
+ {
+ .name = "IRQ_HOTMON_HIGH",
+ .start = IRQ_PRCMU_HOTMON_HIGH,
+ .end = IRQ_PRCMU_HOTMON_HIGH,
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static struct db8500_thsens_platform_data db8500_thsens_data = {
+ .trip_points[0] = {
+ .temp = 70000,
+ .type = THERMAL_TRIP_ACTIVE,
+ .cdev_name = {
+ [0] = "thermal-cpufreq-0",
+ },
+ },
+ .trip_points[1] = {
+ .temp = 75000,
+ .type = THERMAL_TRIP_ACTIVE,
+ .cdev_name = {
+ [0] = "thermal-cpufreq-0",
+ },
+ },
+ .trip_points[2] = {
+ .temp = 80000,
+ .type = THERMAL_TRIP_ACTIVE,
+ .cdev_name = {
+ [0] = "thermal-cpufreq-0",
+ },
+ },
+ .trip_points[3] = {
+ .temp = 85000,
+ .type = THERMAL_TRIP_CRITICAL,
+ },
+ .num_trips = 4,
+};
static struct mfd_cell db8500_prcmu_devs[] = {
{
@@ -3125,11 +3085,10 @@ static struct mfd_cell db8500_prcmu_devs[] = {
.id = -1,
},
{
- .name = "ab8500-core",
- .of_compatible = "stericsson,ab8500",
- .num_resources = ARRAY_SIZE(ab8500_resources),
- .resources = ab8500_resources,
- .id = AB8500_VERSION_AB8500,
+ .name = "db8500-thermal",
+ .num_resources = ARRAY_SIZE(db8500_thsens_resources),
+ .resources = db8500_thsens_resources,
+ .platform_data = &db8500_thsens_data,
},
};
@@ -3141,6 +3100,24 @@ static void db8500_prcmu_update_cpufreq(void)
}
}
+static int db8500_prcmu_register_ab8500(struct device *parent,
+ struct ab8500_platform_data *pdata,
+ int irq)
+{
+ struct resource ab8500_resource = DEFINE_RES_IRQ(irq);
+ struct mfd_cell ab8500_cell = {
+ .name = "ab8500-core",
+ .of_compatible = "stericsson,ab8500",
+ .id = AB8500_VERSION_AB8500,
+ .platform_data = pdata,
+ .pdata_size = sizeof(struct ab8500_platform_data),
+ .resources = &ab8500_resource,
+ .num_resources = 1,
+ };
+
+ return mfd_add_devices(parent, 0, &ab8500_cell, 1, NULL, 0, NULL);
+}
+
/**
* prcmu_fw_init - arch init call for the Linux PRCMU fw init logic
*
@@ -3149,11 +3126,21 @@ static int db8500_prcmu_probe(struct platform_device *pdev)
{
struct device_node *np = pdev->dev.of_node;
struct prcmu_pdata *pdata = dev_get_platdata(&pdev->dev);
- int irq = 0, err = 0, i;
+ int irq = 0, err = 0;
struct resource *res;
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "prcmu");
+ if (!res) {
+ dev_err(&pdev->dev, "no prcmu memory region provided\n");
+ return -ENOENT;
+ }
+ prcmu_base = devm_ioremap(&pdev->dev, res->start, resource_size(res));
+ if (!prcmu_base) {
+ dev_err(&pdev->dev,
+ "failed to ioremap prcmu register memory\n");
+ return -ENOENT;
+ }
init_prcm_registers();
-
dbx500_fw_version_init(pdev, pdata->version_offset);
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "prcmu-tcdm");
if (!res) {
@@ -3180,26 +3167,27 @@ static int db8500_prcmu_probe(struct platform_device *pdev)
goto no_irq_return;
}
- db8500_irq_init(np);
-
- for (i = 0; i < ARRAY_SIZE(db8500_prcmu_devs); i++) {
- if (!strcmp(db8500_prcmu_devs[i].name, "ab8500-core")) {
- db8500_prcmu_devs[i].platform_data = pdata->ab_platdata;
- db8500_prcmu_devs[i].pdata_size = sizeof(struct ab8500_platform_data);
- }
- }
+ db8500_irq_init(np, pdata->irq_base);
prcmu_config_esram0_deep_sleep(ESRAM0_DEEP_SLEEP_STATE_RET);
db8500_prcmu_update_cpufreq();
err = mfd_add_devices(&pdev->dev, 0, db8500_prcmu_devs,
- ARRAY_SIZE(db8500_prcmu_devs), NULL, 0, NULL);
+ ARRAY_SIZE(db8500_prcmu_devs), NULL, 0, db8500_irq_domain);
if (err) {
pr_err("prcmu: Failed to add subdevices\n");
return err;
}
+ err = db8500_prcmu_register_ab8500(&pdev->dev, pdata->ab_platdata,
+ pdata->ab_irq);
+ if (err) {
+ mfd_remove_devices(&pdev->dev);
+ pr_err("prcmu: Failed to add ab8500 subdevice\n");
+ goto no_irq_return;
+ }
+
pr_info("DB8500 PRCMU initialized\n");
no_irq_return: