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-rw-r--r--drivers/i3c/master.c3
-rw-r--r--drivers/i3c/master/dw-i3c-master.c4
-rw-r--r--drivers/i3c/master/mipi-i3c-hci/core.c2
-rw-r--r--drivers/i3c/master/mipi-i3c-hci/dat_v1.c4
-rw-r--r--drivers/i3c/master/mipi-i3c-hci/dma.c2
-rw-r--r--drivers/i3c/master/mipi-i3c-hci/hci.h2
-rw-r--r--drivers/i3c/master/svc-i3c-master.c341
7 files changed, 260 insertions, 98 deletions
diff --git a/drivers/i3c/master.c b/drivers/i3c/master.c
index c3b4c677b442..dfe18dcd008d 100644
--- a/drivers/i3c/master.c
+++ b/drivers/i3c/master.c
@@ -343,7 +343,8 @@ struct bus_type i3c_bus_type = {
static enum i3c_addr_slot_status
i3c_bus_get_addr_slot_status(struct i3c_bus *bus, u16 addr)
{
- int status, bitpos = addr * 2;
+ unsigned long status;
+ int bitpos = addr * 2;
if (addr > I2C_MAX_ADDR)
return I3C_ADDR_SLOT_RSVD;
diff --git a/drivers/i3c/master/dw-i3c-master.c b/drivers/i3c/master/dw-i3c-master.c
index 03a368da51b9..51a8608203de 100644
--- a/drivers/i3c/master/dw-i3c-master.c
+++ b/drivers/i3c/master/dw-i3c-master.c
@@ -793,6 +793,10 @@ static int dw_i3c_master_daa(struct i3c_master_controller *m)
return -ENOMEM;
pos = dw_i3c_master_get_free_pos(master);
+ if (pos < 0) {
+ dw_i3c_master_free_xfer(xfer);
+ return pos;
+ }
cmd = &xfer->cmds[0];
cmd->cmd_hi = 0x1;
cmd->cmd_lo = COMMAND_PORT_DEV_COUNT(master->maxdevs - pos) |
diff --git a/drivers/i3c/master/mipi-i3c-hci/core.c b/drivers/i3c/master/mipi-i3c-hci/core.c
index 1b73647cc3b1..8c01123dc4ed 100644
--- a/drivers/i3c/master/mipi-i3c-hci/core.c
+++ b/drivers/i3c/master/mipi-i3c-hci/core.c
@@ -662,7 +662,7 @@ static int i3c_hci_init(struct i3c_hci *hci)
/* Make sure our data ordering fits the host's */
regval = reg_read(HC_CONTROL);
- if (IS_ENABLED(CONFIG_BIG_ENDIAN)) {
+ if (IS_ENABLED(CONFIG_CPU_BIG_ENDIAN)) {
if (!(regval & HC_CONTROL_DATA_BIG_ENDIAN)) {
regval |= HC_CONTROL_DATA_BIG_ENDIAN;
reg_write(HC_CONTROL, regval);
diff --git a/drivers/i3c/master/mipi-i3c-hci/dat_v1.c b/drivers/i3c/master/mipi-i3c-hci/dat_v1.c
index 783e551a2c85..97bb49ff5b53 100644
--- a/drivers/i3c/master/mipi-i3c-hci/dat_v1.c
+++ b/drivers/i3c/master/mipi-i3c-hci/dat_v1.c
@@ -160,9 +160,7 @@ static int hci_dat_v1_get_index(struct i3c_hci *hci, u8 dev_addr)
unsigned int dat_idx;
u32 dat_w0;
- for (dat_idx = find_first_bit(hci->DAT_data, hci->DAT_entries);
- dat_idx < hci->DAT_entries;
- dat_idx = find_next_bit(hci->DAT_data, hci->DAT_entries, dat_idx)) {
+ for_each_set_bit(dat_idx, hci->DAT_data, hci->DAT_entries) {
dat_w0 = dat_w0_read(dat_idx);
if (FIELD_GET(DAT_0_DYNAMIC_ADDRESS, dat_w0) == dev_addr)
return dat_idx;
diff --git a/drivers/i3c/master/mipi-i3c-hci/dma.c b/drivers/i3c/master/mipi-i3c-hci/dma.c
index af873a9be050..2990ac9eaade 100644
--- a/drivers/i3c/master/mipi-i3c-hci/dma.c
+++ b/drivers/i3c/master/mipi-i3c-hci/dma.c
@@ -223,7 +223,7 @@ static int hci_dma_init(struct i3c_hci *hci)
}
if (nr_rings > XFER_RINGS)
nr_rings = XFER_RINGS;
- rings = kzalloc(sizeof(*rings) + nr_rings * sizeof(*rh), GFP_KERNEL);
+ rings = kzalloc(struct_size(rings, headers, nr_rings), GFP_KERNEL);
if (!rings)
return -ENOMEM;
hci->io_data = rings;
diff --git a/drivers/i3c/master/mipi-i3c-hci/hci.h b/drivers/i3c/master/mipi-i3c-hci/hci.h
index 80beb1d5be8f..f109923f6c3f 100644
--- a/drivers/i3c/master/mipi-i3c-hci/hci.h
+++ b/drivers/i3c/master/mipi-i3c-hci/hci.h
@@ -98,7 +98,7 @@ struct hci_xfer {
static inline struct hci_xfer *hci_alloc_xfer(unsigned int n)
{
- return kzalloc(sizeof(struct hci_xfer) * n, GFP_KERNEL);
+ return kcalloc(n, sizeof(struct hci_xfer), GFP_KERNEL);
}
static inline void hci_free_xfer(struct hci_xfer *xfer, unsigned int n)
diff --git a/drivers/i3c/master/svc-i3c-master.c b/drivers/i3c/master/svc-i3c-master.c
index 879e5a64acaf..7550dad64ecf 100644
--- a/drivers/i3c/master/svc-i3c-master.c
+++ b/drivers/i3c/master/svc-i3c-master.c
@@ -17,7 +17,9 @@
#include <linux/list.h>
#include <linux/module.h>
#include <linux/of.h>
+#include <linux/pinctrl/consumer.h>
#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
/* Master Mode Registers */
#define SVC_I3C_MCONFIG 0x000
@@ -119,6 +121,7 @@
#define SVC_MDYNADDR_ADDR(x) FIELD_PREP(GENMASK(7, 1), (x))
#define SVC_I3C_MAX_DEVS 32
+#define SVC_I3C_PM_TIMEOUT_MS 1000
/* This parameter depends on the implementation and may be tuned */
#define SVC_I3C_FIFO_SIZE 16
@@ -236,6 +239,40 @@ static void svc_i3c_master_disable_interrupts(struct svc_i3c_master *master)
writel(mask, master->regs + SVC_I3C_MINTCLR);
}
+static void svc_i3c_master_clear_merrwarn(struct svc_i3c_master *master)
+{
+ /* Clear pending warnings */
+ writel(readl(master->regs + SVC_I3C_MERRWARN),
+ master->regs + SVC_I3C_MERRWARN);
+}
+
+static void svc_i3c_master_flush_fifo(struct svc_i3c_master *master)
+{
+ /* Flush FIFOs */
+ writel(SVC_I3C_MDATACTRL_FLUSHTB | SVC_I3C_MDATACTRL_FLUSHRB,
+ master->regs + SVC_I3C_MDATACTRL);
+}
+
+static void svc_i3c_master_reset_fifo_trigger(struct svc_i3c_master *master)
+{
+ u32 reg;
+
+ /* Set RX and TX tigger levels, flush FIFOs */
+ reg = SVC_I3C_MDATACTRL_FLUSHTB |
+ SVC_I3C_MDATACTRL_FLUSHRB |
+ SVC_I3C_MDATACTRL_UNLOCK_TRIG |
+ SVC_I3C_MDATACTRL_TXTRIG_FIFO_NOT_FULL |
+ SVC_I3C_MDATACTRL_RXTRIG_FIFO_NOT_EMPTY;
+ writel(reg, master->regs + SVC_I3C_MDATACTRL);
+}
+
+static void svc_i3c_master_reset(struct svc_i3c_master *master)
+{
+ svc_i3c_master_clear_merrwarn(master);
+ svc_i3c_master_reset_fifo_trigger(master);
+ svc_i3c_master_disable_interrupts(master);
+}
+
static inline struct svc_i3c_master *
to_svc_i3c_master(struct i3c_master_controller *master)
{
@@ -279,12 +316,6 @@ static void svc_i3c_master_emit_stop(struct svc_i3c_master *master)
udelay(1);
}
-static void svc_i3c_master_clear_merrwarn(struct svc_i3c_master *master)
-{
- writel(readl(master->regs + SVC_I3C_MERRWARN),
- master->regs + SVC_I3C_MERRWARN);
-}
-
static int svc_i3c_master_handle_ibi(struct svc_i3c_master *master,
struct i3c_dev_desc *dev)
{
@@ -449,13 +480,23 @@ static int svc_i3c_master_bus_init(struct i3c_master_controller *m)
struct i3c_device_info info = {};
unsigned long fclk_rate, fclk_period_ns;
unsigned int high_period_ns, od_low_period_ns;
- u32 ppbaud, pplow, odhpp, odbaud, i2cbaud, reg;
+ u32 ppbaud, pplow, odhpp, odbaud, odstop, i2cbaud, reg;
int ret;
+ ret = pm_runtime_resume_and_get(master->dev);
+ if (ret < 0) {
+ dev_err(master->dev,
+ "<%s> cannot resume i3c bus master, err: %d\n",
+ __func__, ret);
+ return ret;
+ }
+
/* Timings derivation */
fclk_rate = clk_get_rate(master->fclk);
- if (!fclk_rate)
- return -EINVAL;
+ if (!fclk_rate) {
+ ret = -EINVAL;
+ goto rpm_out;
+ }
fclk_period_ns = DIV_ROUND_UP(1000000000, fclk_rate);
@@ -479,6 +520,7 @@ static int svc_i3c_master_bus_init(struct i3c_master_controller *m)
switch (bus->mode) {
case I3C_BUS_MODE_PURE:
i2cbaud = 0;
+ odstop = 0;
break;
case I3C_BUS_MODE_MIXED_FAST:
case I3C_BUS_MODE_MIXED_LIMITED:
@@ -487,6 +529,7 @@ static int svc_i3c_master_bus_init(struct i3c_master_controller *m)
* between the high and low period does not really matter.
*/
i2cbaud = DIV_ROUND_UP(1000, od_low_period_ns) - 2;
+ odstop = 1;
break;
case I3C_BUS_MODE_MIXED_SLOW:
/*
@@ -494,15 +537,16 @@ static int svc_i3c_master_bus_init(struct i3c_master_controller *m)
* constraints as the FM+ mode.
*/
i2cbaud = DIV_ROUND_UP(2500, od_low_period_ns) - 2;
+ odstop = 1;
break;
default:
- return -EINVAL;
+ goto rpm_out;
}
reg = SVC_I3C_MCONFIG_MASTER_EN |
SVC_I3C_MCONFIG_DISTO(0) |
SVC_I3C_MCONFIG_HKEEP(0) |
- SVC_I3C_MCONFIG_ODSTOP(0) |
+ SVC_I3C_MCONFIG_ODSTOP(odstop) |
SVC_I3C_MCONFIG_PPBAUD(ppbaud) |
SVC_I3C_MCONFIG_PPLOW(pplow) |
SVC_I3C_MCONFIG_ODBAUD(odbaud) |
@@ -514,7 +558,7 @@ static int svc_i3c_master_bus_init(struct i3c_master_controller *m)
/* Master core's registration */
ret = i3c_master_get_free_addr(m, 0);
if (ret < 0)
- return ret;
+ goto rpm_out;
info.dyn_addr = ret;
@@ -523,21 +567,33 @@ static int svc_i3c_master_bus_init(struct i3c_master_controller *m)
ret = i3c_master_set_info(&master->base, &info);
if (ret)
- return ret;
+ goto rpm_out;
- svc_i3c_master_enable_interrupts(master, SVC_I3C_MINT_SLVSTART);
+rpm_out:
+ pm_runtime_mark_last_busy(master->dev);
+ pm_runtime_put_autosuspend(master->dev);
- return 0;
+ return ret;
}
static void svc_i3c_master_bus_cleanup(struct i3c_master_controller *m)
{
struct svc_i3c_master *master = to_svc_i3c_master(m);
+ int ret;
+
+ ret = pm_runtime_resume_and_get(master->dev);
+ if (ret < 0) {
+ dev_err(master->dev, "<%s> Cannot get runtime PM.\n", __func__);
+ return;
+ }
svc_i3c_master_disable_interrupts(master);
/* Disable master */
writel(0, master->regs + SVC_I3C_MCONFIG);
+
+ pm_runtime_mark_last_busy(master->dev);
+ pm_runtime_put_autosuspend(master->dev);
}
static int svc_i3c_master_reserve_slot(struct svc_i3c_master *master)
@@ -656,8 +712,10 @@ static int svc_i3c_master_readb(struct svc_i3c_master *master, u8 *dst,
u32 reg;
for (i = 0; i < len; i++) {
- ret = readl_poll_timeout(master->regs + SVC_I3C_MSTATUS, reg,
- SVC_I3C_MSTATUS_RXPEND(reg), 0, 1000);
+ ret = readl_poll_timeout_atomic(master->regs + SVC_I3C_MSTATUS,
+ reg,
+ SVC_I3C_MSTATUS_RXPEND(reg),
+ 0, 1000);
if (ret)
return ret;
@@ -687,10 +745,11 @@ static int svc_i3c_master_do_daa_locked(struct svc_i3c_master *master,
* Either one slave will send its ID, or the assignment process
* is done.
*/
- ret = readl_poll_timeout(master->regs + SVC_I3C_MSTATUS, reg,
- SVC_I3C_MSTATUS_RXPEND(reg) |
- SVC_I3C_MSTATUS_MCTRLDONE(reg),
- 1, 1000);
+ ret = readl_poll_timeout_atomic(master->regs + SVC_I3C_MSTATUS,
+ reg,
+ SVC_I3C_MSTATUS_RXPEND(reg) |
+ SVC_I3C_MSTATUS_MCTRLDONE(reg),
+ 1, 1000);
if (ret)
return ret;
@@ -744,11 +803,12 @@ static int svc_i3c_master_do_daa_locked(struct svc_i3c_master *master,
}
/* Wait for the slave to be ready to receive its address */
- ret = readl_poll_timeout(master->regs + SVC_I3C_MSTATUS, reg,
- SVC_I3C_MSTATUS_MCTRLDONE(reg) &&
- SVC_I3C_MSTATUS_STATE_DAA(reg) &&
- SVC_I3C_MSTATUS_BETWEEN(reg),
- 0, 1000);
+ ret = readl_poll_timeout_atomic(master->regs + SVC_I3C_MSTATUS,
+ reg,
+ SVC_I3C_MSTATUS_MCTRLDONE(reg) &&
+ SVC_I3C_MSTATUS_STATE_DAA(reg) &&
+ SVC_I3C_MSTATUS_BETWEEN(reg),
+ 0, 1000);
if (ret)
return ret;
@@ -832,31 +892,36 @@ static int svc_i3c_master_do_daa(struct i3c_master_controller *m)
unsigned int dev_nb;
int ret, i;
+ ret = pm_runtime_resume_and_get(master->dev);
+ if (ret < 0) {
+ dev_err(master->dev, "<%s> Cannot get runtime PM.\n", __func__);
+ return ret;
+ }
+
spin_lock_irqsave(&master->xferqueue.lock, flags);
ret = svc_i3c_master_do_daa_locked(master, addrs, &dev_nb);
spin_unlock_irqrestore(&master->xferqueue.lock, flags);
- if (ret)
- goto emit_stop;
+ if (ret) {
+ svc_i3c_master_emit_stop(master);
+ svc_i3c_master_clear_merrwarn(master);
+ goto rpm_out;
+ }
/* Register all devices who participated to the core */
for (i = 0; i < dev_nb; i++) {
ret = i3c_master_add_i3c_dev_locked(m, addrs[i]);
if (ret)
- return ret;
+ goto rpm_out;
}
/* Configure IBI auto-rules */
ret = svc_i3c_update_ibirules(master);
- if (ret) {
+ if (ret)
dev_err(master->dev, "Cannot handle such a list of devices");
- return ret;
- }
- return 0;
-
-emit_stop:
- svc_i3c_master_emit_stop(master);
- svc_i3c_master_clear_merrwarn(master);
+rpm_out:
+ pm_runtime_mark_last_busy(master->dev);
+ pm_runtime_put_autosuspend(master->dev);
return ret;
}
@@ -864,27 +929,35 @@ emit_stop:
static int svc_i3c_master_read(struct svc_i3c_master *master,
u8 *in, unsigned int len)
{
- int offset = 0, i, ret;
- u32 mdctrl;
+ int offset = 0, i;
+ u32 mdctrl, mstatus;
+ bool completed = false;
+ unsigned int count;
+ unsigned long start = jiffies;
- while (offset < len) {
- unsigned int count;
+ while (!completed) {
+ mstatus = readl(master->regs + SVC_I3C_MSTATUS);
+ if (SVC_I3C_MSTATUS_COMPLETE(mstatus) != 0)
+ completed = true;
- ret = readl_poll_timeout(master->regs + SVC_I3C_MDATACTRL,
- mdctrl,
- !(mdctrl & SVC_I3C_MDATACTRL_RXEMPTY),
- 0, 1000);
- if (ret)
- return ret;
+ if (time_after(jiffies, start + msecs_to_jiffies(1000))) {
+ dev_dbg(master->dev, "I3C read timeout\n");
+ return -ETIMEDOUT;
+ }
+ mdctrl = readl(master->regs + SVC_I3C_MDATACTRL);
count = SVC_I3C_MDATACTRL_RXCOUNT(mdctrl);
+ if (offset + count > len) {
+ dev_err(master->dev, "I3C receive length too long!\n");
+ return -EINVAL;
+ }
for (i = 0; i < count; i++)
in[offset + i] = readl(master->regs + SVC_I3C_MRDATAB);
offset += count;
}
- return 0;
+ return offset;
}
static int svc_i3c_master_write(struct svc_i3c_master *master,
@@ -917,7 +990,7 @@ static int svc_i3c_master_write(struct svc_i3c_master *master,
static int svc_i3c_master_xfer(struct svc_i3c_master *master,
bool rnw, unsigned int xfer_type, u8 addr,
u8 *in, const u8 *out, unsigned int xfer_len,
- unsigned int read_len, bool continued)
+ unsigned int *read_len, bool continued)
{
u32 reg;
int ret;
@@ -927,7 +1000,7 @@ static int svc_i3c_master_xfer(struct svc_i3c_master *master,
SVC_I3C_MCTRL_IBIRESP_NACK |
SVC_I3C_MCTRL_DIR(rnw) |
SVC_I3C_MCTRL_ADDR(addr) |
- SVC_I3C_MCTRL_RDTERM(read_len),
+ SVC_I3C_MCTRL_RDTERM(*read_len),
master->regs + SVC_I3C_MCTRL);
ret = readl_poll_timeout(master->regs + SVC_I3C_MSTATUS, reg,
@@ -939,17 +1012,27 @@ static int svc_i3c_master_xfer(struct svc_i3c_master *master,
ret = svc_i3c_master_read(master, in, xfer_len);
else
ret = svc_i3c_master_write(master, out, xfer_len);
- if (ret)
+ if (ret < 0)
goto emit_stop;
+ if (rnw)
+ *read_len = ret;
+
ret = readl_poll_timeout(master->regs + SVC_I3C_MSTATUS, reg,
SVC_I3C_MSTATUS_COMPLETE(reg), 0, 1000);
if (ret)
goto emit_stop;
- if (!continued)
+ writel(SVC_I3C_MINT_COMPLETE, master->regs + SVC_I3C_MSTATUS);
+
+ if (!continued) {
svc_i3c_master_emit_stop(master);
+ /* Wait idle if stop is sent. */
+ readl_poll_timeout(master->regs + SVC_I3C_MSTATUS, reg,
+ SVC_I3C_MSTATUS_STATE_IDLE(reg), 0, 1000);
+ }
+
return 0;
emit_stop:
@@ -1007,17 +1090,29 @@ static void svc_i3c_master_start_xfer_locked(struct svc_i3c_master *master)
if (!xfer)
return;
+ ret = pm_runtime_resume_and_get(master->dev);
+ if (ret < 0) {
+ dev_err(master->dev, "<%s> Cannot get runtime PM.\n", __func__);
+ return;
+ }
+
+ svc_i3c_master_clear_merrwarn(master);
+ svc_i3c_master_flush_fifo(master);
+
for (i = 0; i < xfer->ncmds; i++) {
struct svc_i3c_cmd *cmd = &xfer->cmds[i];
ret = svc_i3c_master_xfer(master, cmd->rnw, xfer->type,
cmd->addr, cmd->in, cmd->out,
- cmd->len, cmd->read_len,
+ cmd->len, &cmd->read_len,
cmd->continued);
if (ret)
break;
}
+ pm_runtime_mark_last_busy(master->dev);
+ pm_runtime_put_autosuspend(master->dev);
+
xfer->ret = ret;
complete(&xfer->comp);
@@ -1141,6 +1236,9 @@ static int svc_i3c_master_send_direct_ccc_cmd(struct svc_i3c_master *master,
if (!wait_for_completion_timeout(&xfer->comp, msecs_to_jiffies(1000)))
svc_i3c_master_dequeue_xfer(master, xfer);
+ if (cmd->read_len != xfer_len)
+ ccc->dests[0].payload.len = cmd->read_len;
+
ret = xfer->ret;
svc_i3c_master_free_xfer(xfer);
@@ -1291,6 +1389,16 @@ static void svc_i3c_master_free_ibi(struct i3c_dev_desc *dev)
static int svc_i3c_master_enable_ibi(struct i3c_dev_desc *dev)
{
struct i3c_master_controller *m = i3c_dev_get_master(dev);
+ struct svc_i3c_master *master = to_svc_i3c_master(m);
+ int ret;
+
+ ret = pm_runtime_resume_and_get(master->dev);
+ if (ret < 0) {
+ dev_err(master->dev, "<%s> Cannot get runtime PM.\n", __func__);
+ return ret;
+ }
+
+ svc_i3c_master_enable_interrupts(master, SVC_I3C_MINT_SLVSTART);
return i3c_master_enec_locked(m, dev->info.dyn_addr, I3C_CCC_EVENT_SIR);
}
@@ -1298,8 +1406,17 @@ static int svc_i3c_master_enable_ibi(struct i3c_dev_desc *dev)
static int svc_i3c_master_disable_ibi(struct i3c_dev_desc *dev)
{
struct i3c_master_controller *m = i3c_dev_get_master(dev);
+ struct svc_i3c_master *master = to_svc_i3c_master(m);
+ int ret;
+
+ svc_i3c_master_disable_interrupts(master);
- return i3c_master_disec_locked(m, dev->info.dyn_addr, I3C_CCC_EVENT_SIR);
+ ret = i3c_master_disec_locked(m, dev->info.dyn_addr, I3C_CCC_EVENT_SIR);
+
+ pm_runtime_mark_last_busy(master->dev);
+ pm_runtime_put_autosuspend(master->dev);
+
+ return ret;
}
static void svc_i3c_master_recycle_ibi_slot(struct i3c_dev_desc *dev,
@@ -1330,23 +1447,35 @@ static const struct i3c_master_controller_ops svc_i3c_master_ops = {
.disable_ibi = svc_i3c_master_disable_ibi,
};
-static void svc_i3c_master_reset(struct svc_i3c_master *master)
+static int svc_i3c_master_prepare_clks(struct svc_i3c_master *master)
{
- u32 reg;
+ int ret = 0;
- /* Clear pending warnings */
- writel(readl(master->regs + SVC_I3C_MERRWARN),
- master->regs + SVC_I3C_MERRWARN);
+ ret = clk_prepare_enable(master->pclk);
+ if (ret)
+ return ret;
- /* Set RX and TX tigger levels, flush FIFOs */
- reg = SVC_I3C_MDATACTRL_FLUSHTB |
- SVC_I3C_MDATACTRL_FLUSHRB |
- SVC_I3C_MDATACTRL_UNLOCK_TRIG |
- SVC_I3C_MDATACTRL_TXTRIG_FIFO_NOT_FULL |
- SVC_I3C_MDATACTRL_RXTRIG_FIFO_NOT_EMPTY;
- writel(reg, master->regs + SVC_I3C_MDATACTRL);
+ ret = clk_prepare_enable(master->fclk);
+ if (ret) {
+ clk_disable_unprepare(master->pclk);
+ return ret;
+ }
- svc_i3c_master_disable_interrupts(master);
+ ret = clk_prepare_enable(master->sclk);
+ if (ret) {
+ clk_disable_unprepare(master->pclk);
+ clk_disable_unprepare(master->fclk);
+ return ret;
+ }
+
+ return 0;
+}
+
+static void svc_i3c_master_unprepare_clks(struct svc_i3c_master *master)
+{
+ clk_disable_unprepare(master->pclk);
+ clk_disable_unprepare(master->fclk);
+ clk_disable_unprepare(master->sclk);
}
static int svc_i3c_master_probe(struct platform_device *pdev)
@@ -1381,26 +1510,16 @@ static int svc_i3c_master_probe(struct platform_device *pdev)
master->dev = dev;
- svc_i3c_master_reset(master);
-
- ret = clk_prepare_enable(master->pclk);
+ ret = svc_i3c_master_prepare_clks(master);
if (ret)
return ret;
- ret = clk_prepare_enable(master->fclk);
- if (ret)
- goto err_disable_pclk;
-
- ret = clk_prepare_enable(master->sclk);
- if (ret)
- goto err_disable_fclk;
-
INIT_WORK(&master->hj_work, svc_i3c_master_hj_work);
INIT_WORK(&master->ibi_work, svc_i3c_master_ibi_work);
ret = devm_request_irq(dev, master->irq, svc_i3c_master_irq_handler,
IRQF_NO_SUSPEND, "svc-i3c-irq", master);
if (ret)
- goto err_disable_sclk;
+ goto err_disable_clks;
master->free_slots = GENMASK(SVC_I3C_MAX_DEVS - 1, 0);
@@ -1414,27 +1533,38 @@ static int svc_i3c_master_probe(struct platform_device *pdev)
GFP_KERNEL);
if (!master->ibi.slots) {
ret = -ENOMEM;
- goto err_disable_sclk;
+ goto err_disable_clks;
}
platform_set_drvdata(pdev, master);
+ pm_runtime_set_autosuspend_delay(&pdev->dev, SVC_I3C_PM_TIMEOUT_MS);
+ pm_runtime_use_autosuspend(&pdev->dev);
+ pm_runtime_get_noresume(&pdev->dev);
+ pm_runtime_set_active(&pdev->dev);
+ pm_runtime_enable(&pdev->dev);
+
+ svc_i3c_master_reset(master);
+
/* Register the master */
ret = i3c_master_register(&master->base, &pdev->dev,
&svc_i3c_master_ops, false);
if (ret)
- goto err_disable_sclk;
+ goto rpm_disable;
- return 0;
+ pm_runtime_mark_last_busy(&pdev->dev);
+ pm_runtime_put_autosuspend(&pdev->dev);
-err_disable_sclk:
- clk_disable_unprepare(master->sclk);
+ return 0;
-err_disable_fclk:
- clk_disable_unprepare(master->fclk);
+rpm_disable:
+ pm_runtime_dont_use_autosuspend(&pdev->dev);
+ pm_runtime_put_noidle(&pdev->dev);
+ pm_runtime_set_suspended(&pdev->dev);
+ pm_runtime_disable(&pdev->dev);
-err_disable_pclk:
- clk_disable_unprepare(master->pclk);
+err_disable_clks:
+ svc_i3c_master_unprepare_clks(master);
return ret;
}
@@ -1448,17 +1578,45 @@ static int svc_i3c_master_remove(struct platform_device *pdev)
if (ret)
return ret;
- clk_disable_unprepare(master->pclk);
- clk_disable_unprepare(master->fclk);
- clk_disable_unprepare(master->sclk);
+ pm_runtime_dont_use_autosuspend(&pdev->dev);
+ pm_runtime_disable(&pdev->dev);
return 0;
}
+static int __maybe_unused svc_i3c_runtime_suspend(struct device *dev)
+{
+ struct svc_i3c_master *master = dev_get_drvdata(dev);
+
+ svc_i3c_master_unprepare_clks(master);
+ pinctrl_pm_select_sleep_state(dev);
+
+ return 0;
+}
+
+static int __maybe_unused svc_i3c_runtime_resume(struct device *dev)
+{
+ struct svc_i3c_master *master = dev_get_drvdata(dev);
+ int ret = 0;
+
+ pinctrl_pm_select_default_state(dev);
+ svc_i3c_master_prepare_clks(master);
+
+ return ret;
+}
+
+static const struct dev_pm_ops svc_i3c_pm_ops = {
+ SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
+ pm_runtime_force_resume)
+ SET_RUNTIME_PM_OPS(svc_i3c_runtime_suspend,
+ svc_i3c_runtime_resume, NULL)
+};
+
static const struct of_device_id svc_i3c_master_of_match_tbl[] = {
{ .compatible = "silvaco,i3c-master" },
{ /* sentinel */ },
};
+MODULE_DEVICE_TABLE(of, svc_i3c_master_of_match_tbl);
static struct platform_driver svc_i3c_master = {
.probe = svc_i3c_master_probe,
@@ -1466,6 +1624,7 @@ static struct platform_driver svc_i3c_master = {
.driver = {
.name = "silvaco-i3c-master",
.of_match_table = svc_i3c_master_of_match_tbl,
+ .pm = &svc_i3c_pm_ops,
},
};
module_platform_driver(svc_i3c_master);
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