[PATCH v5 0/4] Add DT support for davinci_mmc driver

[PATCH v5 0/4] Add DT support for davinci_mmc driver

[Manjunathappa, Prakash]

Patch set adds DT support for davinci_mmc driver and is
verified on da850-evm without card_detect/write_protect and
EDMA support. Also takecare to derive controller IP version from
platform_device_id table, remove version specification in pdata.

Applies on top of below patch under community review:
"Enable SPI flash support on da850-evm DT kernel"
http://www.spinics.net/lists/arm-kernel/msg229328.html

Depends on patch waiting for acceptance:
Patch "mmc: davinci: allow driver to work without DMA resource"
http://www.mail-archive.com/linux-mmc at vger.kernel.org/msg18771.html

Since v4:
Minor nit, check on return value for failure of max-frequency property
parsing.
Merged patch "ARM: davinci: mmc: derive version information from device name"
with patch 1/4.

Since v3:
Added support to derive IP version information from platform_device_id table.

Since v2:
Modified the default value for bus-width and skipping the property specifications
for highspeed card capabilties for now. Re-ordered patch 2 and 3.

Since v1:
Modified the DT parse function to take default values, updated DT binding
documentation accordingly.

Manjunathappa, Prakash (4):
  ARM: davinci: mmc: derive version information from device name
  mmc: davinci_mmc: add DT support
  ARM: davinci: da850: add mmc DT entries
  ARM: davinci: da850: override mmc DT node device name

 .../devicetree/bindings/mmc/davinci_mmc.txt        |   25 ++++++
 arch/arm/boot/dts/da850-evm.dts                    |    7 ++
 arch/arm/boot/dts/da850.dtsi                       |   15 ++++
 arch/arm/mach-davinci/board-da830-evm.c            |    1 -
 arch/arm/mach-davinci/board-da850-evm.c            |    2 -
 arch/arm/mach-davinci/board-dm355-evm.c            |    1 -
 arch/arm/mach-davinci/board-dm365-evm.c            |    1 -
 arch/arm/mach-davinci/board-dm644x-evm.c           |    1 -
 arch/arm/mach-davinci/board-neuros-osd2.c          |    1 -
 arch/arm/mach-davinci/board-omapl138-hawk.c        |    1 -
 arch/arm/mach-davinci/board-tnetv107x-evm.c        |    1 -
 arch/arm/mach-davinci/da830.c                      |    2 +-
 arch/arm/mach-davinci/da850.c                      |    4 +-
 arch/arm/mach-davinci/da8xx-dt.c                   |    2 +
 arch/arm/mach-davinci/devices-da8xx.c              |    4 +-
 arch/arm/mach-davinci/devices-tnetv107x.c          |    4 +-
 arch/arm/mach-davinci/devices.c                    |    6 +-
 arch/arm/mach-davinci/dm355.c                      |    4 +-
 arch/arm/mach-davinci/dm365.c                      |    4 +-
 arch/arm/mach-davinci/dm644x.c                     |    2 +-
 arch/arm/mach-davinci/tnetv107x.c                  |    4 +-
 drivers/mmc/host/davinci_mmc.c                     |   82 +++++++++++++++++++-
 include/linux/platform_data/mmc-davinci.h          |    3 -
 23 files changed, 146 insertions(+), 31 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/mmc/davinci_mmc.txt

-- 
1.7.4.1

[PATCH v5 1/4] ARM: davinci: mmc: derive version information from device name

[Manjunathappa, Prakash]

Remove specifying mmc controller IP version information via platform
data, instead specify device name so that driver derives it from
platform_device_id table. Also change the clock node name to match
the changed dev_id.
Tested on da850-evm to make sure driver loads without clk_get failures.

Signed-off-by: Manjunathappa, Prakash <prakash.pm@ti.com>
Reviewed-by: Sekhar Nori <nsekhar@ti.com>
---
Since v4:
Minor nit, check on return value for failure of max-frequency property
parsing.
Merged patch "ARM: davinci: mmc: derive version information from device name"
with this patch

 arch/arm/mach-davinci/board-da830-evm.c     |    1 -
 arch/arm/mach-davinci/board-da850-evm.c     |    2 --
 arch/arm/mach-davinci/board-dm355-evm.c     |    1 -
 arch/arm/mach-davinci/board-dm365-evm.c     |    1 -
 arch/arm/mach-davinci/board-dm644x-evm.c    |    1 -
 arch/arm/mach-davinci/board-neuros-osd2.c   |    1 -
 arch/arm/mach-davinci/board-omapl138-hawk.c |    1 -
 arch/arm/mach-davinci/board-tnetv107x-evm.c |    1 -
 arch/arm/mach-davinci/da830.c               |    2 +-
 arch/arm/mach-davinci/da850.c               |    4 ++--
 arch/arm/mach-davinci/devices-da8xx.c       |    4 ++--
 arch/arm/mach-davinci/devices-tnetv107x.c   |    4 ++--
 arch/arm/mach-davinci/devices.c             |    6 ++++--
 arch/arm/mach-davinci/dm355.c               |    4 ++--
 arch/arm/mach-davinci/dm365.c               |    4 ++--
 arch/arm/mach-davinci/dm644x.c              |    2 +-
 arch/arm/mach-davinci/tnetv107x.c           |    4 ++--
 drivers/mmc/host/davinci_mmc.c              |   18 +++++++++++++++++-
 include/linux/platform_data/mmc-davinci.h   |    3 ---
 19 files changed, 35 insertions(+), 29 deletions(-)

diff --git a/arch/arm/mach-davinci/board-da830-evm.c b/arch/arm/mach-davinci/board-da830-evm.c
index 95b5e10..d6a41f0 100644
--- a/arch/arm/mach-davinci/board-da830-evm.c
+++ b/arch/arm/mach-davinci/board-da830-evm.c
@@ -246,7 +246,6 @@ static struct davinci_mmc_config da830_evm_mmc_config = {
 	.wires			= 8,
 	.max_freq		= 50000000,
 	.caps			= MMC_CAP_MMC_HIGHSPEED | MMC_CAP_SD_HIGHSPEED,
-	.version		= MMC_CTLR_VERSION_2,
 };
 
 static inline void da830_evm_init_mmc(void)
diff --git a/arch/arm/mach-davinci/board-da850-evm.c b/arch/arm/mach-davinci/board-da850-evm.c
index 0299915..ff0dfd6 100644
--- a/arch/arm/mach-davinci/board-da850-evm.c
+++ b/arch/arm/mach-davinci/board-da850-evm.c
@@ -802,7 +802,6 @@ static struct davinci_mmc_config da850_mmc_config = {
 	.wires		= 4,
 	.max_freq	= 50000000,
 	.caps		= MMC_CAP_MMC_HIGHSPEED | MMC_CAP_SD_HIGHSPEED,
-	.version	= MMC_CTLR_VERSION_2,
 };
 
 static const short da850_evm_mmcsd0_pins[] __initconst = {
@@ -1362,7 +1361,6 @@ static struct davinci_mmc_config da850_wl12xx_mmc_config = {
 	.max_freq	= 25000000,
 	.caps		= MMC_CAP_4_BIT_DATA | MMC_CAP_NONREMOVABLE |
 			  MMC_CAP_POWER_OFF_CARD,
-	.version	= MMC_CTLR_VERSION_2,
 };
 
 static const short da850_wl12xx_pins[] __initconst = {
diff --git a/arch/arm/mach-davinci/board-dm355-evm.c b/arch/arm/mach-davinci/board-dm355-evm.c
index cdf8d07..2caa5e9 100644
--- a/arch/arm/mach-davinci/board-dm355-evm.c
+++ b/arch/arm/mach-davinci/board-dm355-evm.c
@@ -280,7 +280,6 @@ static struct davinci_mmc_config dm355evm_mmc_config = {
 	.wires		= 4,
 	.max_freq       = 50000000,
 	.caps           = MMC_CAP_MMC_HIGHSPEED | MMC_CAP_SD_HIGHSPEED,
-	.version	= MMC_CTLR_VERSION_1,
 };
 
 /* Don't connect anything to J10 unless you're only using USB host
diff --git a/arch/arm/mach-davinci/board-dm365-evm.c b/arch/arm/mach-davinci/board-dm365-evm.c
index 5d49c75..ba06295 100644
--- a/arch/arm/mach-davinci/board-dm365-evm.c
+++ b/arch/arm/mach-davinci/board-dm365-evm.c
@@ -253,7 +253,6 @@ static struct davinci_mmc_config dm365evm_mmc_config = {
 	.wires		= 4,
 	.max_freq	= 50000000,
 	.caps		= MMC_CAP_MMC_HIGHSPEED | MMC_CAP_SD_HIGHSPEED,
-	.version	= MMC_CTLR_VERSION_2,
 };
 
 static void dm365evm_emac_configure(void)
diff --git a/arch/arm/mach-davinci/board-dm644x-evm.c b/arch/arm/mach-davinci/board-dm644x-evm.c
index f5e018d..4a57280 100644
--- a/arch/arm/mach-davinci/board-dm644x-evm.c
+++ b/arch/arm/mach-davinci/board-dm644x-evm.c
@@ -570,7 +570,6 @@ static struct davinci_mmc_config dm6446evm_mmc_config = {
 	.get_cd		= dm6444evm_mmc_get_cd,
 	.get_ro		= dm6444evm_mmc_get_ro,
 	.wires		= 4,
-	.version	= MMC_CTLR_VERSION_1
 };
 
 static struct i2c_board_info __initdata i2c_info[] =  {
diff --git a/arch/arm/mach-davinci/board-neuros-osd2.c b/arch/arm/mach-davinci/board-neuros-osd2.c
index 3e3e3af..bad8192 100644
--- a/arch/arm/mach-davinci/board-neuros-osd2.c
+++ b/arch/arm/mach-davinci/board-neuros-osd2.c
@@ -164,7 +164,6 @@ static void __init davinci_ntosd2_map_io(void)
 
 static struct davinci_mmc_config davinci_ntosd2_mmc_config = {
 	.wires		= 4,
-	.version	= MMC_CTLR_VERSION_1
 };
 
 
diff --git a/arch/arm/mach-davinci/board-omapl138-hawk.c b/arch/arm/mach-davinci/board-omapl138-hawk.c
index dc1208e..4331ff3 100644
--- a/arch/arm/mach-davinci/board-omapl138-hawk.c
+++ b/arch/arm/mach-davinci/board-omapl138-hawk.c
@@ -138,7 +138,6 @@ static struct davinci_mmc_config da850_mmc_config = {
 	.wires		= 4,
 	.max_freq	= 50000000,
 	.caps		= MMC_CAP_MMC_HIGHSPEED | MMC_CAP_SD_HIGHSPEED,
-	.version	= MMC_CTLR_VERSION_2,
 };
 
 static __init void omapl138_hawk_mmc_init(void)
diff --git a/arch/arm/mach-davinci/board-tnetv107x-evm.c b/arch/arm/mach-davinci/board-tnetv107x-evm.c
index be30997..42066ed 100644
--- a/arch/arm/mach-davinci/board-tnetv107x-evm.c
+++ b/arch/arm/mach-davinci/board-tnetv107x-evm.c
@@ -85,7 +85,6 @@ static struct davinci_mmc_config mmc_config = {
 	.wires		= 4,
 	.max_freq	= 50000000,
 	.caps		= MMC_CAP_MMC_HIGHSPEED | MMC_CAP_SD_HIGHSPEED,
-	.version	= MMC_CTLR_VERSION_1,
 };
 
 static const short sdio1_pins[] __initconst = {
diff --git a/arch/arm/mach-davinci/da830.c b/arch/arm/mach-davinci/da830.c
index 678a54a..42ad1ab 100644
--- a/arch/arm/mach-davinci/da830.c
+++ b/arch/arm/mach-davinci/da830.c
@@ -394,7 +394,7 @@ static struct clk_lookup da830_clks[] = {
 	CLK(NULL,		"tpcc",		&tpcc_clk),
 	CLK(NULL,		"tptc0",	&tptc0_clk),
 	CLK(NULL,		"tptc1",	&tptc1_clk),
-	CLK("davinci_mmc.0",	NULL,		&mmcsd_clk),
+	CLK("davinci-mmc-da830.0", NULL,	&mmcsd_clk),
 	CLK(NULL,		"uart0",	&uart0_clk),
 	CLK(NULL,		"uart1",	&uart1_clk),
 	CLK(NULL,		"uart2",	&uart2_clk),
diff --git a/arch/arm/mach-davinci/da850.c b/arch/arm/mach-davinci/da850.c
index 6b9154e..364f61d 100644
--- a/arch/arm/mach-davinci/da850.c
+++ b/arch/arm/mach-davinci/da850.c
@@ -404,8 +404,8 @@ static struct clk_lookup da850_clks[] = {
 	CLK("davinci_emac.1",	NULL,		&emac_clk),
 	CLK("davinci-mcasp.0",	NULL,		&mcasp_clk),
 	CLK("da8xx_lcdc.0",	"fck",		&lcdc_clk),
-	CLK("davinci_mmc.0",	NULL,		&mmcsd0_clk),
-	CLK("davinci_mmc.1",	NULL,		&mmcsd1_clk),
+	CLK("davinci-mmc-da830.0", NULL,	&mmcsd0_clk),
+	CLK("davinci-mmc-da830.1", NULL,	&mmcsd1_clk),
 	CLK(NULL,		"aemif",	&aemif_clk),
 	CLK(NULL,		"usb11",	&usb11_clk),
 	CLK(NULL,		"usb20",	&usb20_clk),
diff --git a/arch/arm/mach-davinci/devices-da8xx.c b/arch/arm/mach-davinci/devices-da8xx.c
index cc6916d..3f27600 100644
--- a/arch/arm/mach-davinci/devices-da8xx.c
+++ b/arch/arm/mach-davinci/devices-da8xx.c
@@ -664,7 +664,7 @@ static struct resource da8xx_mmcsd0_resources[] = {
 };
 
 static struct platform_device da8xx_mmcsd0_device = {
-	.name		= "davinci_mmc",
+	.name		= "davinci-mmc-da830",
 	.id		= 0,
 	.num_resources	= ARRAY_SIZE(da8xx_mmcsd0_resources),
 	.resource	= da8xx_mmcsd0_resources,
@@ -701,7 +701,7 @@ static struct resource da850_mmcsd1_resources[] = {
 };
 
 static struct platform_device da850_mmcsd1_device = {
-	.name		= "davinci_mmc",
+	.name		= "davinci-mmc-da830",
 	.id		= 1,
 	.num_resources	= ARRAY_SIZE(da850_mmcsd1_resources),
 	.resource	= da850_mmcsd1_resources,
diff --git a/arch/arm/mach-davinci/devices-tnetv107x.c b/arch/arm/mach-davinci/devices-tnetv107x.c
index 773ab07..0eda4d1 100644
--- a/arch/arm/mach-davinci/devices-tnetv107x.c
+++ b/arch/arm/mach-davinci/devices-tnetv107x.c
@@ -218,7 +218,7 @@ static u64 mmc1_dma_mask = DMA_BIT_MASK(32);
 
 static struct platform_device mmc_devices[2] = {
 	{
-		.name		= "davinci_mmc",
+		.name		= "davinci-mmc-dm355",
 		.id		= 0,
 		.dev		= {
 			.dma_mask		= &mmc0_dma_mask,
@@ -228,7 +228,7 @@ static struct platform_device mmc_devices[2] = {
 		.resource	= mmc0_resources
 	},
 	{
-		.name		= "davinci_mmc",
+		.name		= "davinci-mmc-dm355",
 		.id		= 1,
 		.dev		= {
 			.dma_mask		= &mmc1_dma_mask,
diff --git a/arch/arm/mach-davinci/devices.c b/arch/arm/mach-davinci/devices.c
index 4c48a36..92411b2 100644
--- a/arch/arm/mach-davinci/devices.c
+++ b/arch/arm/mach-davinci/devices.c
@@ -150,7 +150,7 @@ static struct resource mmcsd0_resources[] = {
 };
 
 static struct platform_device davinci_mmcsd0_device = {
-	.name = "davinci_mmc",
+	.name = "davinci-mmc-dm355",
 	.id = 0,
 	.dev = {
 		.dma_mask = &mmcsd0_dma_mask,
@@ -187,7 +187,7 @@ static struct resource mmcsd1_resources[] = {
 };
 
 static struct platform_device davinci_mmcsd1_device = {
-	.name = "davinci_mmc",
+	.name = "davinci-mmc-dm355",
 	.id = 1,
 	.dev = {
 		.dma_mask = &mmcsd1_dma_mask,
@@ -235,6 +235,7 @@ void __init davinci_setup_mmc(int module, struct davinci_mmc_config *config)
 			mmcsd1_resources[0].end = DM365_MMCSD1_BASE +
 							SZ_4K - 1;
 			mmcsd1_resources[2].start = IRQ_DM365_SDIOINT1;
+			davinci_mmcsd1_device.name = "davinci-mmc-da830";
 		} else
 			break;
 
@@ -256,6 +257,7 @@ void __init davinci_setup_mmc(int module, struct davinci_mmc_config *config)
 			mmcsd0_resources[0].end = DM365_MMCSD0_BASE +
 							SZ_4K - 1;
 			mmcsd0_resources[2].start = IRQ_DM365_SDIOINT0;
+			davinci_mmcsd0_device.name = "davinci-mmc-da830";
 		} else if (cpu_is_davinci_dm644x()) {
 			/* REVISIT: should this be in board-init code? */
 			/* Power-on 3.3V IO cells */
diff --git a/arch/arm/mach-davinci/dm355.c b/arch/arm/mach-davinci/dm355.c
index b49c3b7..ed3e79a 100644
--- a/arch/arm/mach-davinci/dm355.c
+++ b/arch/arm/mach-davinci/dm355.c
@@ -361,8 +361,8 @@ static struct clk_lookup dm355_clks[] = {
 	CLK("i2c_davinci.1", NULL, &i2c_clk),
 	CLK("davinci-mcbsp.0", NULL, &asp0_clk),
 	CLK("davinci-mcbsp.1", NULL, &asp1_clk),
-	CLK("davinci_mmc.0", NULL, &mmcsd0_clk),
-	CLK("davinci_mmc.1", NULL, &mmcsd1_clk),
+	CLK("davinci-mmc-dm355.0", NULL, &mmcsd0_clk),
+	CLK("davinci-mmc-dm355.1", NULL, &mmcsd1_clk),
 	CLK("spi_davinci.0", NULL, &spi0_clk),
 	CLK("spi_davinci.1", NULL, &spi1_clk),
 	CLK("spi_davinci.2", NULL, &spi2_clk),
diff --git a/arch/arm/mach-davinci/dm365.c b/arch/arm/mach-davinci/dm365.c
index 6c39805..3f46b24 100644
--- a/arch/arm/mach-davinci/dm365.c
+++ b/arch/arm/mach-davinci/dm365.c
@@ -454,8 +454,8 @@ static struct clk_lookup dm365_clks[] = {
 	CLK(NULL, "uart0", &uart0_clk),
 	CLK(NULL, "uart1", &uart1_clk),
 	CLK("i2c_davinci.1", NULL, &i2c_clk),
-	CLK("davinci_mmc.0", NULL, &mmcsd0_clk),
-	CLK("davinci_mmc.1", NULL, &mmcsd1_clk),
+	CLK("davinci-mmc-da830.0", NULL, &mmcsd0_clk),
+	CLK("davinci-mmc-da830.1", NULL, &mmcsd1_clk),
 	CLK("spi_davinci.0", NULL, &spi0_clk),
 	CLK("spi_davinci.1", NULL, &spi1_clk),
 	CLK("spi_davinci.2", NULL, &spi2_clk),
diff --git a/arch/arm/mach-davinci/dm644x.c b/arch/arm/mach-davinci/dm644x.c
index 11c79a3..5e1e502 100644
--- a/arch/arm/mach-davinci/dm644x.c
+++ b/arch/arm/mach-davinci/dm644x.c
@@ -310,7 +310,7 @@ static struct clk_lookup dm644x_clks[] = {
 	CLK("i2c_davinci.1", NULL, &i2c_clk),
 	CLK("palm_bk3710", NULL, &ide_clk),
 	CLK("davinci-mcbsp", NULL, &asp_clk),
-	CLK("davinci_mmc.0", NULL, &mmcsd_clk),
+	CLK("davinci-mmc-dm355.0", NULL, &mmcsd_clk),
 	CLK(NULL, "spi", &spi_clk),
 	CLK(NULL, "gpio", &gpio_clk),
 	CLK(NULL, "usb", &usb_clk),
diff --git a/arch/arm/mach-davinci/tnetv107x.c b/arch/arm/mach-davinci/tnetv107x.c
index dc1a209..f9b9399 100644
--- a/arch/arm/mach-davinci/tnetv107x.c
+++ b/arch/arm/mach-davinci/tnetv107x.c
@@ -272,7 +272,7 @@ static struct clk_lookup clks[] = {
 	CLK("tnetv107x-keypad.0", NULL,			&clk_keypad),
 	CLK(NULL,		"clk_gpio",		&clk_gpio),
 	CLK(NULL,		"clk_mdio",		&clk_mdio),
-	CLK("davinci_mmc.0",	NULL,			&clk_sdio0),
+	CLK("davinci-mmc-dm355.0",	NULL,			&clk_sdio0),
 	CLK(NULL,		"uart0",		&clk_uart0),
 	CLK(NULL,		"uart1",		&clk_uart1),
 	CLK(NULL,		"timer0",		&clk_timer0),
@@ -292,7 +292,7 @@ static struct clk_lookup clks[] = {
 	CLK(NULL,		"clk_system",		&clk_system),
 	CLK(NULL,		"clk_imcop",		&clk_imcop),
 	CLK(NULL,		"clk_spare",		&clk_spare),
-	CLK("davinci_mmc.1",	NULL,			&clk_sdio1),
+	CLK("davinci-mmc-dm355.1",	NULL,			&clk_sdio1),
 	CLK(NULL,		"clk_ddr2_vrst",	&clk_ddr2_vrst),
 	CLK(NULL,		"clk_ddr2_vctl_rst",	&clk_ddr2_vctl_rst),
 	CLK(NULL,		NULL,			NULL),
diff --git a/drivers/mmc/host/davinci_mmc.c b/drivers/mmc/host/davinci_mmc.c
index 27123f8..50e9782 100644
--- a/drivers/mmc/host/davinci_mmc.c
+++ b/drivers/mmc/host/davinci_mmc.c
@@ -1157,6 +1157,18 @@ static void __init init_mmcsd_host(struct mmc_davinci_host *host)
 	mmc_davinci_reset_ctrl(host, 0);
 }
 
+static struct platform_device_id davinci_mmc_devtype[] = {
+	{
+		.name	= "davinci-mmc-dm355",
+		.driver_data = MMC_CTLR_VERSION_1,
+	}, {
+		.name	= "davinci-mmc-da830",
+		.driver_data = MMC_CTLR_VERSION_2,
+	},
+	{},
+};
+MODULE_DEVICE_TABLE(platform, davinci_mmc_devtype);
+
 static int __init davinci_mmcsd_probe(struct platform_device *pdev)
 {
 	struct davinci_mmc_config *pdata = pdev->dev.platform_data;
@@ -1165,6 +1177,7 @@ static int __init davinci_mmcsd_probe(struct platform_device *pdev)
 	struct resource *r, *mem = NULL;
 	int ret = 0, irq = 0;
 	size_t mem_size;
+	const struct platform_device_id *id_entry;
 
 	/* REVISIT:  when we're fully converted, fail if pdata is NULL */
 
@@ -1239,7 +1252,9 @@ static int __init davinci_mmcsd_probe(struct platform_device *pdev)
 	if (pdata && (pdata->wires == 8))
 		mmc->caps |= (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA);
 
-	host->version = pdata->version;
+	id_entry = platform_get_device_id(pdev);
+	if (id_entry)
+		host->version = id_entry->driver_data;
 
 	mmc->ops = &mmc_davinci_ops;
 	mmc->f_min = 312500;
@@ -1410,6 +1425,7 @@ static struct platform_driver davinci_mmcsd_driver = {
 		.pm	= davinci_mmcsd_pm_ops,
 	},
 	.remove		= __exit_p(davinci_mmcsd_remove),
+	.id_table	= davinci_mmc_devtype,
 };
 
 static int __init davinci_mmcsd_init(void)
diff --git a/include/linux/platform_data/mmc-davinci.h b/include/linux/platform_data/mmc-davinci.h
index 5ba6b22..9cea4ee 100644
--- a/include/linux/platform_data/mmc-davinci.h
+++ b/include/linux/platform_data/mmc-davinci.h
@@ -23,9 +23,6 @@ struct davinci_mmc_config {
 	/* any additional host capabilities: OR'd in to mmc->f_caps */
 	u32     caps;
 
-	/* Version of the MMC/SD controller */
-	u8	version;
-
 	/* Number of sg segments */
 	u8	nr_sg;
 };
-- 
1.7.4.1

[PATCH v5 2/4] mmc: davinci_mmc: add DT support

[Manjunathappa, Prakash]

Adds device tree support for davinci_mmc. Also add binding documentation.
As of now in non-dma PIO mode and without GPIO card_detect/write_protect
option because of dependencies on EDMA and GPIO module DT support.

Signed-off-by: Manjunathappa, Prakash <prakash.pm@ti.com>
Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Cc: linux-mmc at vger.kernel.org
Cc: linux-arm-kernel at lists.infradead.org
Cc: davinci-linux-open-source at linux.davincidsp.com
Cc: devicetree-discuss at lists.ozlabs.org
Cc: cjb at laptop.org
Cc: Sekhar Nori <nsekhar@ti.com>
Cc: mporter at ti.com
---
 .../devicetree/bindings/mmc/davinci_mmc.txt        |   25 ++++++++
 drivers/mmc/host/davinci_mmc.c                     |   64 +++++++++++++++++++-
 2 files changed, 87 insertions(+), 2 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/mmc/davinci_mmc.txt

diff --git a/Documentation/devicetree/bindings/mmc/davinci_mmc.txt b/Documentation/devicetree/bindings/mmc/davinci_mmc.txt
new file mode 100644
index 0000000..247be0f
--- /dev/null
+++ b/Documentation/devicetree/bindings/mmc/davinci_mmc.txt
@@ -0,0 +1,25 @@
+* TI Highspeed MMC host controller for DaVinci
+
+The Highspeed MMC Host Controller on TI DaVinci family
+provides an interface for MMC, SD and SDIO types of memory cards.
+
+This file documents the properties used by the davinci_mmc driver.
+
+Required properties:
+- compatible:
+ Should be "ti,davinci-mmc-da830": for da830, da850, dm365
+ Should be "ti,davinci-mmc-dm355": for dm355, dm644x
+
+Optional properties:
+- bus-width: Number of data lines, can be <1>, <4>, or <8>, default <1>
+- max-frequency: Maximum operating clock frequency, default 25MHz.
+
+Example:
+	mmc0: mmc at 1c40000 {
+		compatible = "ti,davinci-mmc-da830",
+		reg = <0x40000 0x1000>;
+		interrupts = <16>;
+		status = "okay";
+		bus-width = <4>;
+		max-frequency = <50000000>;
+	};
diff --git a/drivers/mmc/host/davinci_mmc.c b/drivers/mmc/host/davinci_mmc.c
index 50e9782..8819d25 100644
--- a/drivers/mmc/host/davinci_mmc.c
+++ b/drivers/mmc/host/davinci_mmc.c
@@ -34,6 +34,8 @@
 #include <linux/dma-mapping.h>
 #include <linux/edma.h>
 #include <linux/mmc/mmc.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
 
 #include <linux/platform_data/mmc-davinci.h>
 
@@ -1169,9 +1171,62 @@ static struct platform_device_id davinci_mmc_devtype[] = {
 };
 MODULE_DEVICE_TABLE(platform, davinci_mmc_devtype);
 
-static int __init davinci_mmcsd_probe(struct platform_device *pdev)
+static const struct of_device_id davinci_mmc_dt_ids[] = {
+	{
+		.compatible = "ti,davinci-mmc-dm355",
+		.data = &davinci_mmc_devtype[MMC_CTLR_VERSION_1],
+	},
+	{
+		.compatible = "ti,davinci-mmc-da830",
+		.data = &davinci_mmc_devtype[MMC_CTLR_VERSION_2],
+	},
+	{},
+};
+MODULE_DEVICE_TABLE(of, davinci_mmc_dt_ids);
+
+static struct davinci_mmc_config
+	*mmc_parse_pdata(struct platform_device *pdev)
 {
+	struct device_node *np;
 	struct davinci_mmc_config *pdata = pdev->dev.platform_data;
+	const struct of_device_id *match =
+		of_match_device(of_match_ptr(davinci_mmc_dt_ids), &pdev->dev);
+	u32 data;
+
+	np = pdev->dev.of_node;
+	if (!np)
+		return pdata;
+
+	pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
+	if (!pdata) {
+		dev_err(&pdev->dev, "Failed to allocate memory for struct davinci_mmc_config\n");
+		goto nodata;
+	}
+
+	if (match)
+		pdev->id_entry = match->data;
+
+	if (of_property_read_u32(np, "max-frequency", &pdata->max_freq))
+		dev_info(&pdev->dev, "'max-frequency' property not specified, defaulting to 25MHz\n");
+
+	of_property_read_u32(np, "bus-width", &data);
+	switch (data) {
+	case 1:
+	case 4:
+	case 8:
+		pdata->wires = data;
+		break;
+	default:
+		pdata->wires = 1;
+		dev_info(&pdev->dev, "Unsupported buswidth, defaulting to 1 bit\n");
+	}
+nodata:
+	return pdata;
+}
+
+static int __init davinci_mmcsd_probe(struct platform_device *pdev)
+{
+	struct davinci_mmc_config *pdata = NULL;
 	struct mmc_davinci_host *host = NULL;
 	struct mmc_host *mmc = NULL;
 	struct resource *r, *mem = NULL;
@@ -1179,7 +1234,11 @@ static int __init davinci_mmcsd_probe(struct platform_device *pdev)
 	size_t mem_size;
 	const struct platform_device_id *id_entry;
 
-	/* REVISIT:  when we're fully converted, fail if pdata is NULL */
+	pdata = mmc_parse_pdata(pdev);
+	if (pdata == NULL) {
+		dev_err(&pdev->dev, "Can not get platform data\n");
+		return -ENOENT;
+	}
 
 	ret = -ENODEV;
 	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
@@ -1423,6 +1482,7 @@ static struct platform_driver davinci_mmcsd_driver = {
 		.name	= "davinci_mmc",
 		.owner	= THIS_MODULE,
 		.pm	= davinci_mmcsd_pm_ops,
+		.of_match_table = of_match_ptr(davinci_mmc_dt_ids),
 	},
 	.remove		= __exit_p(davinci_mmcsd_remove),
 	.id_table	= davinci_mmc_devtype,
-- 
1.7.4.1

[PATCH v5 3/4] ARM: davinci: da850: add mmc DT entries

[Manjunathappa, Prakash]

Add DT entry for MMC. Also add entry for pinmux information.
Tested:
1) Without GPIO card detection and EDMA support as DT support for
   GPIO and EDMA are yet come.
2) By creating/deleting files and mounting/unmounting the partition.

Signed-off-by: Manjunathappa, Prakash <prakash.pm@ti.com>
Cc: linux-mmc at vger.kernel.org
Cc: linux-arm-kernel at lists.infradead.org
Cc: linux-kernel at vger.kernel.org
Cc: davinci-linux-open-source at linux.davincidsp.com
Cc: devicetree-discuss at lists.ozlabs.org
Cc: cjb at laptop.org
Cc: Sekhar Nori <nsekhar@ti.com>
---
 arch/arm/boot/dts/da850-evm.dts |    7 +++++++
 arch/arm/boot/dts/da850.dtsi    |   15 +++++++++++++++
 2 files changed, 22 insertions(+), 0 deletions(-)

diff --git a/arch/arm/boot/dts/da850-evm.dts b/arch/arm/boot/dts/da850-evm.dts
index fe2bbe7..bc1f951 100644
--- a/arch/arm/boot/dts/da850-evm.dts
+++ b/arch/arm/boot/dts/da850-evm.dts
@@ -81,6 +81,13 @@
 				};
 			};
 		};
+		mmc0: mmc at 1c40000 {
+			max-frequency = <50000000>;
+			bus-width = <4>;
+			status = "okay";
+			pinctrl-names = "default";
+			pinctrl-0 = <&mmc0_pins>;
+		};
 	};
 	nand_cs3 at 62000000 {
 		status = "okay";
diff --git a/arch/arm/boot/dts/da850.dtsi b/arch/arm/boot/dts/da850.dtsi
index 327fb06..142382d 100644
--- a/arch/arm/boot/dts/da850.dtsi
+++ b/arch/arm/boot/dts/da850.dtsi
@@ -70,6 +70,15 @@
 					0x14 0x00111111 0x00ffffff
 				>;
 			};
+			mmc0_pins: pinmux_mmc_pins {
+				pinctrl-single,bits = <
+					/* MMCSD0_DAT[3] MMCSD0_DAT[2]
+					 * MMCSD0_DAT[1] MMCSD0_DAT[0]
+					 * MMCSD0_CMD    MMCSD0_CLK
+					 */
+					0x28 0x00222222  0x00ffffff
+				>;
+			};
 		};
 		serial0: serial at 1c42000 {
 			compatible = "ns16550a";
@@ -115,6 +124,12 @@
 			reg = <0x21000 0x1000>;
 			status = "disabled";
 		};
+		mmc0: mmc at 1c40000 {
+			compatible = "ti,davinci-mmc-da830";
+			reg = <0x40000 0x1000>;
+			interrupts = <16>;
+			status = "disabled";
+		};
 		spi1: spi at 1f0e000 {
 			#address-cells = <1>;
 			#size-cells = <0>;
-- 
1.7.4.1

[PATCH v5 4/4] ARM: davinci: da850: override mmc DT node device name

[Manjunathappa, Prakash]

Populate OF_DEV_AUXDATA with desired device name expected by
davinci_mmc driver. Without this clk_get of davinci_mmc DT driver
fails.

Signed-off-by: Manjunathappa, Prakash <prakash.pm@ti.com>
Cc: linux-mmc at vger.kernel.org
Cc: linux-arm-kernel at lists.infradead.org
Cc: linux-kernel at vger.kernel.org
Cc: davinci-linux-open-source at linux.davincidsp.com
Cc: devicetree-discuss at lists.ozlabs.org
Cc: cjb at laptop.org
Cc: Sekhar Nori <nsekhar@ti.com>
---
 arch/arm/mach-davinci/da8xx-dt.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/arch/arm/mach-davinci/da8xx-dt.c b/arch/arm/mach-davinci/da8xx-dt.c
index e049f07..516ec7d 100644
--- a/arch/arm/mach-davinci/da8xx-dt.c
+++ b/arch/arm/mach-davinci/da8xx-dt.c
@@ -41,6 +41,8 @@ struct of_dev_auxdata da850_auxdata_lookup[] __initdata = {
 	OF_DEV_AUXDATA("ti,davinci-i2c", 0x01c22000, "i2c_davinci.1", NULL),
 	OF_DEV_AUXDATA("ti,davinci-wdt", 0x01c21000, "watchdog", NULL),
 	OF_DEV_AUXDATA("ti,da830-spi", 0x01f0e000, "spi_davinci.1", NULL),
+	OF_DEV_AUXDATA("ti,davinci-mmc-da830", 0x01c40000,
+			"davinci-mmc-da830.0", NULL),
 	{}
 };
 
-- 
1.7.4.1

[PATCH v5 1/4] ARM: davinci: mmc: derive version information from device name

[Sekhar Nori]

Prakash,

The series looks good to me. I tested it again on DA850 EVM (with and
without DT).

On 3/12/2013 7:43 PM, Manjunathappa, Prakash wrote:
> Remove specifying mmc controller IP version information via platform
> data, instead specify device name so that driver derives it from
> platform_device_id table. Also change the clock node name to match
> the changed dev_id.
> Tested on da850-evm to make sure driver loads without clk_get failures.
> 
> Signed-off-by: Manjunathappa, Prakash <prakash.pm@ti.com>
> Reviewed-by: Sekhar Nori <nsekhar@ti.com>
> ---

> diff --git a/drivers/mmc/host/davinci_mmc.c b/drivers/mmc/host/davinci_mmc.c
> index 27123f8..50e9782 100644
> --- a/drivers/mmc/host/davinci_mmc.c
> +++ b/drivers/mmc/host/davinci_mmc.c
> @@ -1157,6 +1157,18 @@ static void __init init_mmcsd_host(struct mmc_davinci_host *host)
>  	mmc_davinci_reset_ctrl(host, 0);
>  }
>  
> +static struct platform_device_id davinci_mmc_devtype[] = {
> +	{
> +		.name	= "davinci-mmc-dm355",
> +		.driver_data = MMC_CTLR_VERSION_1,
> +	}, {
> +		.name	= "davinci-mmc-da830",
> +		.driver_data = MMC_CTLR_VERSION_2,
> +	},
> +	{},
> +};
> +MODULE_DEVICE_TABLE(platform, davinci_mmc_devtype);

I should have mentioned this previously, but your choice of name here is
too long. You can simply use dm355-mmc (rather dm6441-mmc?) and
da830-mmc instead like you did for SPI. This would have saved some long
lines. Sorry about not asking for this earlier. I know it would have
saved you a bunch of effort.

Thanks,
Sekhar

[PATCH v5 0/4] Add DT support for davinci_mmc driver

[Sekhar Nori]

On 3/12/2013 7:43 PM, Manjunathappa, Prakash wrote:
> Patch set adds DT support for davinci_mmc driver and is
> verified on da850-evm without card_detect/write_protect and
> EDMA support. Also takecare to derive controller IP version from
> platform_device_id table, remove version specification in pdata.
> 
> Applies on top of below patch under community review:
> "Enable SPI flash support on da850-evm DT kernel"
> http://www.spinics.net/lists/arm-kernel/msg229328.html
> 
> Depends on patch waiting for acceptance:
> Patch "mmc: davinci: allow driver to work without DMA resource"
> http://www.mail-archive.com/linux-mmc at vger.kernel.org/msg18771.html

Since this patch did not get picked for v3.9, it may be worthwhile
rebasing it and adding to this series.

Thanks,
Sekhar

[PATCH v5 1/4] ARM: davinci: mmc: derive version information from device name

[Manjunathappa, Prakash]

On Thu, Mar 14, 2013 at 16:38:09, Nori, Sekhar wrote:
> Prakash,
> 
> The series looks good to me. I tested it again on DA850 EVM (with and
> without DT).
> 
> On 3/12/2013 7:43 PM, Manjunathappa, Prakash wrote:
> > Remove specifying mmc controller IP version information via platform
> > data, instead specify device name so that driver derives it from
> > platform_device_id table. Also change the clock node name to match
> > the changed dev_id.
> > Tested on da850-evm to make sure driver loads without clk_get failures.
> > 
> > Signed-off-by: Manjunathappa, Prakash <prakash.pm@ti.com>
> > Reviewed-by: Sekhar Nori <nsekhar@ti.com>
> > ---
> 
> > diff --git a/drivers/mmc/host/davinci_mmc.c b/drivers/mmc/host/davinci_mmc.c
> > index 27123f8..50e9782 100644
> > --- a/drivers/mmc/host/davinci_mmc.c
> > +++ b/drivers/mmc/host/davinci_mmc.c
> > @@ -1157,6 +1157,18 @@ static void __init init_mmcsd_host(struct mmc_davinci_host *host)
> >  	mmc_davinci_reset_ctrl(host, 0);
> >  }
> >  
> > +static struct platform_device_id davinci_mmc_devtype[] = {
> > +	{
> > +		.name	= "davinci-mmc-dm355",
> > +		.driver_data = MMC_CTLR_VERSION_1,
> > +	}, {
> > +		.name	= "davinci-mmc-da830",
> > +		.driver_data = MMC_CTLR_VERSION_2,
> > +	},
> > +	{},
> > +};
> > +MODULE_DEVICE_TABLE(platform, davinci_mmc_devtype);
> 
> I should have mentioned this previously, but your choice of name here is
> too long. You can simply use dm355-mmc (rather dm6441-mmc?) and
> da830-mmc instead like you did for SPI. This would have saved some long
> lines. Sorry about not asking for this earlier. I know it would have
> saved you a bunch of effort.
> 

No problem, will change the name.

Thanks,
Prakash 

[PATCH v5 0/4] Add DT support for davinci_mmc driver

[Manjunathappa, Prakash]

On Thu, Mar 14, 2013 at 17:25:13, Nori, Sekhar wrote:
> On 3/12/2013 7:43 PM, Manjunathappa, Prakash wrote:
> > Patch set adds DT support for davinci_mmc driver and is
> > verified on da850-evm without card_detect/write_protect and
> > EDMA support. Also takecare to derive controller IP version from
> > platform_device_id table, remove version specification in pdata.
> > 
> > Applies on top of below patch under community review:
> > "Enable SPI flash support on da850-evm DT kernel"
> > http://www.spinics.net/lists/arm-kernel/msg229328.html
> > 
> > Depends on patch waiting for acceptance:
> > Patch "mmc: davinci: allow driver to work without DMA resource"
> > http://www.mail-archive.com/linux-mmc at vger.kernel.org/msg18771.html
> 
> Since this patch did not get picked for v3.9, it may be worthwhile
> rebasing it and adding to this series.
> 

Will do that.

Thanks,
Prakash