Merge tag 'memory-controller-drv-6.3-2' of https://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux-mem-ctrl into soc/drivers

Memory controller drivers for v6.3

1. TI Emif: simplify device_get_match_data().
2. Renesas RPC IF:
   - Few fixes (decouple driver's private data structure from other
     drivers; unbind and rebind due to triggering managed resources
     allocation from other drivers);
   - Bigger rework around improved runtime Power Management.

* tag 'memory-controller-drv-6.3-2' of https://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux-mem-ctrl:
  memory: ti-emif-pm: Use device_get_match_data() to simplify the code
  memory: renesas-rpc-if: Remove Runtime PM wrappers
  memory: renesas-rpc-if: Pass device instead of rpcif to rpcif_*()
  memory: renesas-rpc-if: Improve Runtime PM handling
  memory: renesas-rpc-if: Always use dev in rpcif_probe()
  memory: renesas-rpc-if: Move resource acquisition to .probe()
  memory: renesas-rpc-if: Split-off private data from struct rpcif

Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Arnd Bergmann <[email protected]>

5 files changed, 119 insertions, 106 deletions

diff --git a/drivers/memory/renesas-rpc-if.c b/drivers/memory/renesas-rpc-if.c
index 09cd4318a83d..62b06041d758 100644
--- a/drivers/memory/renesas-rpc-if.c
+++ b/drivers/memory/renesas-rpc-if.c
@@ -163,14 +163,36 @@ static const struct regmap_access_table rpcif_volatile_table = {
 	.n_yes_ranges	= ARRAY_SIZE(rpcif_volatile_ranges),
 };
 
+struct rpcif_priv {
+	struct device *dev;
+	void __iomem *base;
+	void __iomem *dirmap;
+	struct regmap *regmap;
+	struct reset_control *rstc;
+	struct platform_device *vdev;
+	size_t size;
+	enum rpcif_type type;
+	enum rpcif_data_dir dir;
+	u8 bus_size;
+	u8 xfer_size;
+	void *buffer;
+	u32 xferlen;
+	u32 smcr;
+	u32 smadr;
+	u32 command;		/* DRCMR or SMCMR */
+	u32 option;		/* DROPR or SMOPR */
+	u32 enable;		/* DRENR or SMENR */
+	u32 dummy;		/* DRDMCR or SMDMCR */
+	u32 ddr;		/* DRDRENR or SMDRENR */
+};
 
 /*
  * Custom accessor functions to ensure SM[RW]DR[01] are always accessed with
- * proper width.  Requires rpcif.xfer_size to be correctly set before!
+ * proper width.  Requires rpcif_priv.xfer_size to be correctly set before!
  */
 static int rpcif_reg_read(void *context, unsigned int reg, unsigned int *val)
 {
-	struct rpcif *rpc = context;
+	struct rpcif_priv *rpc = context;
 
 	switch (reg) {
 	case RPCIF_SMRDR0:
@@ -206,7 +228,7 @@ static int rpcif_reg_read(void *context, unsigned int reg, unsigned int *val)
 
 static int rpcif_reg_write(void *context, unsigned int reg, unsigned int val)
 {
-	struct rpcif *rpc = context;
+	struct rpcif_priv *rpc = context;
 
 	switch (reg) {
 	case RPCIF_SMWDR0:
@@ -253,39 +275,18 @@ static const struct regmap_config rpcif_regmap_config = {
 	.volatile_table	= &rpcif_volatile_table,
 };
 
-int rpcif_sw_init(struct rpcif *rpc, struct device *dev)
+int rpcif_sw_init(struct rpcif *rpcif, struct device *dev)
 {
-	struct platform_device *pdev = to_platform_device(dev);
-	struct resource *res;
+	struct rpcif_priv *rpc = dev_get_drvdata(dev);
 
-	rpc->dev = dev;
-
-	rpc->base = devm_platform_ioremap_resource_byname(pdev, "regs");
-	if (IS_ERR(rpc->base))
-		return PTR_ERR(rpc->base);
-
-	rpc->regmap = devm_regmap_init(&pdev->dev, NULL, rpc, &rpcif_regmap_config);
-	if (IS_ERR(rpc->regmap)) {
-		dev_err(&pdev->dev,
-			"failed to init regmap for rpcif, error %ld\n",
-			PTR_ERR(rpc->regmap));
-		return	PTR_ERR(rpc->regmap);
-	}
-
-	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dirmap");
-	rpc->dirmap = devm_ioremap_resource(&pdev->dev, res);
-	if (IS_ERR(rpc->dirmap))
-		return PTR_ERR(rpc->dirmap);
-	rpc->size = resource_size(res);
-
-	rpc->type = (uintptr_t)of_device_get_match_data(dev);
-	rpc->rstc = devm_reset_control_get_exclusive(&pdev->dev, NULL);
-
-	return PTR_ERR_OR_ZERO(rpc->rstc);
+	rpcif->dev = dev;
+	rpcif->dirmap = rpc->dirmap;
+	rpcif->size = rpc->size;
+	return 0;
 }
 EXPORT_SYMBOL(rpcif_sw_init);
 
-static void rpcif_rzg2l_timing_adjust_sdr(struct rpcif *rpc)
+static void rpcif_rzg2l_timing_adjust_sdr(struct rpcif_priv *rpc)
 {
 	regmap_write(rpc->regmap, RPCIF_PHYWR, 0xa5390000);
 	regmap_write(rpc->regmap, RPCIF_PHYADD, 0x80000000);
@@ -299,15 +300,17 @@ static void rpcif_rzg2l_timing_adjust_sdr(struct rpcif *rpc)
 	regmap_write(rpc->regmap, RPCIF_PHYADD, 0x80000032);
 }
 
-int rpcif_hw_init(struct rpcif *rpc, bool hyperflash)
+int rpcif_hw_init(struct device *dev, bool hyperflash)
 {
+	struct rpcif_priv *rpc = dev_get_drvdata(dev);
 	u32 dummy;
+	int ret;
 
-	pm_runtime_get_sync(rpc->dev);
+	ret = pm_runtime_resume_and_get(dev);
+	if (ret)
+		return ret;
 
 	if (rpc->type == RPCIF_RZ_G2L) {
-		int ret;
-
 		ret = reset_control_reset(rpc->rstc);
 		if (ret)
 			return ret;
@@ -356,7 +359,7 @@ int rpcif_hw_init(struct rpcif *rpc, bool hyperflash)
 	regmap_write(rpc->regmap, RPCIF_SSLDR, RPCIF_SSLDR_SPNDL(7) |
 		     RPCIF_SSLDR_SLNDL(7) | RPCIF_SSLDR_SCKDL(7));
 
-	pm_runtime_put(rpc->dev);
+	pm_runtime_put(dev);
 
 	rpc->bus_size = hyperflash ? 2 : 1;
 
@@ -364,7 +367,7 @@ int rpcif_hw_init(struct rpcif *rpc, bool hyperflash)
 }
 EXPORT_SYMBOL(rpcif_hw_init);
 
-static int wait_msg_xfer_end(struct rpcif *rpc)
+static int wait_msg_xfer_end(struct rpcif_priv *rpc)
 {
 	u32 sts;
 
@@ -373,7 +376,7 @@ static int wait_msg_xfer_end(struct rpcif *rpc)
 					USEC_PER_SEC);
 }
 
-static u8 rpcif_bits_set(struct rpcif *rpc, u32 nbytes)
+static u8 rpcif_bits_set(struct rpcif_priv *rpc, u32 nbytes)
 {
 	if (rpc->bus_size == 2)
 		nbytes /= 2;
@@ -386,9 +389,11 @@ static u8 rpcif_bit_size(u8 buswidth)
 	return buswidth > 4 ? 2 : ilog2(buswidth);
 }
 
-void rpcif_prepare(struct rpcif *rpc, const struct rpcif_op *op, u64 *offs,
+void rpcif_prepare(struct device *dev, const struct rpcif_op *op, u64 *offs,
 		   size_t *len)
 {
+	struct rpcif_priv *rpc = dev_get_drvdata(dev);
+
 	rpc->smcr = 0;
 	rpc->smadr = 0;
 	rpc->enable = 0;
@@ -472,12 +477,15 @@ void rpcif_prepare(struct rpcif *rpc, const struct rpcif_op *op, u64 *offs,
 }
 EXPORT_SYMBOL(rpcif_prepare);
 
-int rpcif_manual_xfer(struct rpcif *rpc)
+int rpcif_manual_xfer(struct device *dev)
 {
+	struct rpcif_priv *rpc = dev_get_drvdata(dev);
 	u32 smenr, smcr, pos = 0, max = rpc->bus_size == 2 ? 8 : 4;
 	int ret = 0;
 
-	pm_runtime_get_sync(rpc->dev);
+	ret = pm_runtime_resume_and_get(dev);
+	if (ret < 0)
+		return ret;
 
 	regmap_update_bits(rpc->regmap, RPCIF_PHYCNT,
 			   RPCIF_PHYCNT_CAL, RPCIF_PHYCNT_CAL);
@@ -587,13 +595,13 @@ int rpcif_manual_xfer(struct rpcif *rpc)
 	}
 
 exit:
-	pm_runtime_put(rpc->dev);
+	pm_runtime_put(dev);
 	return ret;
 
 err_out:
 	if (reset_control_reset(rpc->rstc))
-		dev_err(rpc->dev, "Failed to reset HW\n");
-	rpcif_hw_init(rpc, rpc->bus_size == 2);
+		dev_err(dev, "Failed to reset HW\n");
+	rpcif_hw_init(dev, rpc->bus_size == 2);
 	goto exit;
 }
 EXPORT_SYMBOL(rpcif_manual_xfer);
@@ -640,15 +648,19 @@ static void memcpy_fromio_readw(void *to,
 	}
 }
 
-ssize_t rpcif_dirmap_read(struct rpcif *rpc, u64 offs, size_t len, void *buf)
+ssize_t rpcif_dirmap_read(struct device *dev, u64 offs, size_t len, void *buf)
 {
+	struct rpcif_priv *rpc = dev_get_drvdata(dev);
 	loff_t from = offs & (rpc->size - 1);
 	size_t size = rpc->size - from;
+	int ret;
 
 	if (len > size)
 		len = size;
 
-	pm_runtime_get_sync(rpc->dev);
+	ret = pm_runtime_resume_and_get(dev);
+	if (ret < 0)
+		return ret;
 
 	regmap_update_bits(rpc->regmap, RPCIF_CMNCR, RPCIF_CMNCR_MD, 0);
 	regmap_write(rpc->regmap, RPCIF_DRCR, 0);
@@ -666,7 +678,7 @@ ssize_t rpcif_dirmap_read(struct rpcif *rpc, u64 offs, size_t len, void *buf)
 	else
 		memcpy_fromio(buf, rpc->dirmap + from, len);
 
-	pm_runtime_put(rpc->dev);
+	pm_runtime_put(dev);
 
 	return len;
 }
@@ -674,14 +686,17 @@ EXPORT_SYMBOL(rpcif_dirmap_read);
 
 static int rpcif_probe(struct platform_device *pdev)
 {
+	struct device *dev = &pdev->dev;
 	struct platform_device *vdev;
 	struct device_node *flash;
+	struct rpcif_priv *rpc;
+	struct resource *res;
 	const char *name;
 	int ret;
 
-	flash = of_get_next_child(pdev->dev.of_node, NULL);
+	flash = of_get_next_child(dev->of_node, NULL);
 	if (!flash) {
-		dev_warn(&pdev->dev, "no flash node found\n");
+		dev_warn(dev, "no flash node found\n");
 		return -ENODEV;
 	}
 
@@ -691,16 +706,45 @@ static int rpcif_probe(struct platform_device *pdev)
 		name = "rpc-if-hyperflash";
 	} else	{
 		of_node_put(flash);
-		dev_warn(&pdev->dev, "unknown flash type\n");
+		dev_warn(dev, "unknown flash type\n");
 		return -ENODEV;
 	}
 	of_node_put(flash);
 
+	rpc = devm_kzalloc(dev, sizeof(*rpc), GFP_KERNEL);
+	if (!rpc)
+		return -ENOMEM;
+
+	rpc->base = devm_platform_ioremap_resource_byname(pdev, "regs");
+	if (IS_ERR(rpc->base))
+		return PTR_ERR(rpc->base);
+
+	rpc->regmap = devm_regmap_init(dev, NULL, rpc, &rpcif_regmap_config);
+	if (IS_ERR(rpc->regmap)) {
+		dev_err(dev, "failed to init regmap for rpcif, error %ld\n",
+			PTR_ERR(rpc->regmap));
+		return	PTR_ERR(rpc->regmap);
+	}
+
+	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dirmap");
+	rpc->dirmap = devm_ioremap_resource(dev, res);
+	if (IS_ERR(rpc->dirmap))
+		return PTR_ERR(rpc->dirmap);
+	rpc->size = resource_size(res);
+
+	rpc->type = (uintptr_t)of_device_get_match_data(dev);
+	rpc->rstc = devm_reset_control_get_exclusive(dev, NULL);
+	if (IS_ERR(rpc->rstc))
+		return PTR_ERR(rpc->rstc);
+
 	vdev = platform_device_alloc(name, pdev->id);
 	if (!vdev)
 		return -ENOMEM;
-	vdev->dev.parent = &pdev->dev;
-	platform_set_drvdata(pdev, vdev);
+	vdev->dev.parent = dev;
+
+	rpc->dev = dev;
+	rpc->vdev = vdev;
+	platform_set_drvdata(pdev, rpc);
 
 	ret = platform_device_add(vdev);
 	if (ret) {
@@ -713,9 +757,9 @@ static int rpcif_probe(struct platform_device *pdev)
 
 static int rpcif_remove(struct platform_device *pdev)
 {
-	struct platform_device *vdev = platform_get_drvdata(pdev);
+	struct rpcif_priv *rpc = platform_get_drvdata(pdev);
 
-	platform_device_unregister(vdev);
+	platform_device_unregister(rpc->vdev);
 
 	return 0;
 }
diff --git a/drivers/memory/ti-emif-pm.c b/drivers/memory/ti-emif-pm.c
index 31d6266f008c..cef0d3beb63b 100644
--- a/drivers/memory/ti-emif-pm.c
+++ b/drivers/memory/ti-emif-pm.c
@@ -277,18 +277,13 @@ static int ti_emif_probe(struct platform_device *pdev)
 	int ret;
 	struct resource *res;
 	struct device *dev = &pdev->dev;
-	const struct of_device_id *match;
 	struct ti_emif_data *emif_data;
 
 	emif_data = devm_kzalloc(dev, sizeof(*emif_data), GFP_KERNEL);
 	if (!emif_data)
 		return -ENOMEM;
 
-	match = of_match_device(ti_emif_of_match, &pdev->dev);
-	if (!match)
-		return -ENODEV;
-
-	emif_data->pm_data.ti_emif_sram_config = (unsigned long)match->data;
+	emif_data->pm_data.ti_emif_sram_config = (unsigned long) device_get_match_data(&pdev->dev);
 
 	emif_data->pm_data.ti_emif_base_addr_virt = devm_platform_get_and_ioremap_resource(pdev,
 											   0,
diff --git a/drivers/mtd/hyperbus/rpc-if.c b/drivers/mtd/hyperbus/rpc-if.c
index d00d30243403..ef32fca5f785 100644
--- a/drivers/mtd/hyperbus/rpc-if.c
+++ b/drivers/mtd/hyperbus/rpc-if.c
@@ -56,7 +56,7 @@ static void rpcif_hb_prepare_read(struct rpcif *rpc, void *to,
 	op.data.nbytes = len;
 	op.data.buf.in = to;
 
-	rpcif_prepare(rpc, &op, NULL, NULL);
+	rpcif_prepare(rpc->dev, &op, NULL, NULL);
 }
 
 static void rpcif_hb_prepare_write(struct rpcif *rpc, unsigned long to,
@@ -70,7 +70,7 @@ static void rpcif_hb_prepare_write(struct rpcif *rpc, unsigned long to,
 	op.data.nbytes = len;
 	op.data.buf.out = from;
 
-	rpcif_prepare(rpc, &op, NULL, NULL);
+	rpcif_prepare(rpc->dev, &op, NULL, NULL);
 }
 
 static u16 rpcif_hb_read16(struct hyperbus_device *hbdev, unsigned long addr)
@@ -81,7 +81,7 @@ static u16 rpcif_hb_read16(struct hyperbus_device *hbdev, unsigned long addr)
 
 	rpcif_hb_prepare_read(&hyperbus->rpc, &data, addr, 2);
 
-	rpcif_manual_xfer(&hyperbus->rpc);
+	rpcif_manual_xfer(hyperbus->rpc.dev);
 
 	return data.x[0];
 }
@@ -94,7 +94,7 @@ static void rpcif_hb_write16(struct hyperbus_device *hbdev, unsigned long addr,
 
 	rpcif_hb_prepare_write(&hyperbus->rpc, addr, &data, 2);
 
-	rpcif_manual_xfer(&hyperbus->rpc);
+	rpcif_manual_xfer(hyperbus->rpc.dev);
 }
 
 static void rpcif_hb_copy_from(struct hyperbus_device *hbdev, void *to,
@@ -105,7 +105,7 @@ static void rpcif_hb_copy_from(struct hyperbus_device *hbdev, void *to,
 
 	rpcif_hb_prepare_read(&hyperbus->rpc, to, from, len);
 
-	rpcif_dirmap_read(&hyperbus->rpc, from, len, to);
+	rpcif_dirmap_read(hyperbus->rpc.dev, from, len, to);
 }
 
 static const struct hyperbus_ops rpcif_hb_ops = {
@@ -130,9 +130,9 @@ static int rpcif_hb_probe(struct platform_device *pdev)
 
 	platform_set_drvdata(pdev, hyperbus);
 
-	rpcif_enable_rpm(&hyperbus->rpc);
+	pm_runtime_enable(hyperbus->rpc.dev);
 
-	error = rpcif_hw_init(&hyperbus->rpc, true);
+	error = rpcif_hw_init(hyperbus->rpc.dev, true);
 	if (error)
 		goto out_disable_rpm;
 
@@ -150,7 +150,7 @@ static int rpcif_hb_probe(struct platform_device *pdev)
 	return 0;
 
 out_disable_rpm:
-	rpcif_disable_rpm(&hyperbus->rpc);
+	pm_runtime_disable(hyperbus->rpc.dev);
 	return error;
 }
 
@@ -160,7 +160,7 @@ static int rpcif_hb_remove(struct platform_device *pdev)
 
 	hyperbus_unregister_device(&hyperbus->hbdev);
 
-	rpcif_disable_rpm(&hyperbus->rpc);
+	pm_runtime_disable(hyperbus->rpc.dev);
 
 	return 0;
 }
diff --git a/drivers/spi/spi-rpc-if.c b/drivers/spi/spi-rpc-if.c
index 24ec1c83f379..ec0904faf3a1 100644
--- a/drivers/spi/spi-rpc-if.c
+++ b/drivers/spi/spi-rpc-if.c
@@ -58,7 +58,7 @@ static void rpcif_spi_mem_prepare(struct spi_device *spi_dev,
 		rpc_op.data.dir = RPCIF_NO_DATA;
 	}
 
-	rpcif_prepare(rpc, &rpc_op, offs, len);
+	rpcif_prepare(rpc->dev, &rpc_op, offs, len);
 }
 
 static bool rpcif_spi_mem_supports_op(struct spi_mem *mem,
@@ -86,7 +86,7 @@ static ssize_t rpcif_spi_mem_dirmap_read(struct spi_mem_dirmap_desc *desc,
 
 	rpcif_spi_mem_prepare(desc->mem->spi, &desc->info.op_tmpl, &offs, &len);
 
-	return rpcif_dirmap_read(rpc, offs, len, buf);
+	return rpcif_dirmap_read(rpc->dev, offs, len, buf);
 }
 
 static int rpcif_spi_mem_dirmap_create(struct spi_mem_dirmap_desc *desc)
@@ -117,7 +117,7 @@ static int rpcif_spi_mem_exec_op(struct spi_mem *mem,
 
 	rpcif_spi_mem_prepare(mem->spi, op, NULL, NULL);
 
-	return rpcif_manual_xfer(rpc);
+	return rpcif_manual_xfer(rpc->dev);
 }
 
 static const struct spi_controller_mem_ops rpcif_spi_mem_ops = {
@@ -147,7 +147,7 @@ static int rpcif_spi_probe(struct platform_device *pdev)
 
 	ctlr->dev.of_node = parent->of_node;
 
-	rpcif_enable_rpm(rpc);
+	pm_runtime_enable(rpc->dev);
 
 	ctlr->num_chipselect = 1;
 	ctlr->mem_ops = &rpcif_spi_mem_ops;
@@ -156,7 +156,7 @@ static int rpcif_spi_probe(struct platform_device *pdev)
 	ctlr->mode_bits = SPI_CPOL | SPI_CPHA | SPI_TX_QUAD | SPI_RX_QUAD;
 	ctlr->flags = SPI_CONTROLLER_HALF_DUPLEX;
 
-	error = rpcif_hw_init(rpc, false);
+	error = rpcif_hw_init(rpc->dev, false);
 	if (error)
 		goto out_disable_rpm;
 
@@ -169,7 +169,7 @@ static int rpcif_spi_probe(struct platform_device *pdev)
 	return 0;
 
 out_disable_rpm:
-	rpcif_disable_rpm(rpc);
+	pm_runtime_disable(rpc->dev);
 	return error;
 }
 
@@ -179,7 +179,7 @@ static int rpcif_spi_remove(struct platform_device *pdev)
 	struct rpcif *rpc = spi_controller_get_devdata(ctlr);
 
 	spi_unregister_controller(ctlr);
-	rpcif_disable_rpm(rpc);
+	pm_runtime_disable(rpc->dev);
 
 	return 0;
 }
diff --git a/include/memory/renesas-rpc-if.h b/include/memory/renesas-rpc-if.h
index 862eff613dc7..b8fa30fd6b50 100644
--- a/include/memory/renesas-rpc-if.h
+++ b/include/memory/renesas-rpc-if.h
@@ -65,41 +65,15 @@ enum rpcif_type {
 
 struct rpcif {
 	struct device *dev;
-	void __iomem *base;
 	void __iomem *dirmap;
-	struct regmap *regmap;
-	struct reset_control *rstc;
 	size_t size;
-	enum rpcif_type type;
-	enum rpcif_data_dir dir;
-	u8 bus_size;
-	u8 xfer_size;
-	void *buffer;
-	u32 xferlen;
-	u32 smcr;
-	u32 smadr;
-	u32 command;		/* DRCMR or SMCMR */
-	u32 option;		/* DROPR or SMOPR */
-	u32 enable;		/* DRENR or SMENR */
-	u32 dummy;		/* DRDMCR or SMDMCR */
-	u32 ddr;		/* DRDRENR or SMDRENR */
 };
 
 int rpcif_sw_init(struct rpcif *rpc, struct device *dev);
-int rpcif_hw_init(struct rpcif *rpc, bool hyperflash);
-void rpcif_prepare(struct rpcif *rpc, const struct rpcif_op *op, u64 *offs,
+int rpcif_hw_init(struct device *dev, bool hyperflash);
+void rpcif_prepare(struct device *dev, const struct rpcif_op *op, u64 *offs,
 		   size_t *len);
-int rpcif_manual_xfer(struct rpcif *rpc);
-ssize_t rpcif_dirmap_read(struct rpcif *rpc, u64 offs, size_t len, void *buf);
-
-static inline void rpcif_enable_rpm(struct rpcif *rpc)
-{
-	pm_runtime_enable(rpc->dev);
-}
-
-static inline void rpcif_disable_rpm(struct rpcif *rpc)
-{
-	pm_runtime_disable(rpc->dev);
-}
+int rpcif_manual_xfer(struct device *dev);
+ssize_t rpcif_dirmap_read(struct device *dev, u64 offs, size_t len, void *buf);
 
 #endif // __RENESAS_RPC_IF_H