[RFC] ARM: at91: sama5d3: Migrate to MFD-based SMC driver

[Alexander Shiyan <eagle.alexander923@gmail.com>]

This replaces the low-level SMC driver implementation with the
MFD-based driver for SAMA5D3 platforms.

Signed-off-by: Alexander Shiyan <eagle.alexander923@gmail.com>
---
 arch/arm/boards/sama5d3_xplained/board.c | 46 ------------------------
 arch/arm/mach-at91/Kconfig               |  1 -
 arch/arm/mach-at91/sam9_smc.c            |  5 +--
 3 files changed, 1 insertion(+), 51 deletions(-)

diff --git a/arch/arm/boards/sama5d3_xplained/board.c b/arch/arm/boards/sama5d3_xplained/board.c
index 4d908e6b9f..3ee3f2166e 100644
--- a/arch/arm/boards/sama5d3_xplained/board.c
+++ b/arch/arm/boards/sama5d3_xplained/board.c
@@ -3,60 +3,14 @@
 #include <common.h>
 #include <init.h>
 #include <envfs.h>
-#include <mach/at91/at91sam9_smc.h>
-#include <mach/at91/hardware.h>
-#include <linux/clk.h>
-
-static struct sam9_smc_config sama5d3_xplained_nand_smc_config = {
-	.ncs_read_setup		= 1,
-	.nrd_setup		= 2,
-	.ncs_write_setup	= 1,
-	.nwe_setup		= 2,
-
-	.ncs_read_pulse		= 5,
-	.nrd_pulse		= 3,
-	.ncs_write_pulse	= 5,
-	.nwe_pulse		= 3,
-
-	.read_cycle		= 8,
-	.write_cycle		= 8,
-
-	.mode			= AT91_SMC_READMODE | AT91_SMC_WRITEMODE |
-				  AT91_SMC_EXNWMODE_DISABLE | AT91_SMC_DBW_8,
-	.tdf_cycles		= 3,
-
-	.tclr			= 3,
-	.tadl			= 10,
-	.tar			= 3,
-	.ocms			= 0,
-	.trr			= 4,
-	.twb			= 5,
-	.rbnsel			= 3,
-	.nfsel			= 1
-};
 
 static int sama5d3_xplained_probe(struct device *dev)
 {
-	struct clk *clk;
-
 	barebox_set_hostname("sama5d3_xplained");
 
 	if (IS_ENABLED(CONFIG_DEFAULT_ENVIRONMENT_GENERIC))
 		defaultenv_append_directory(defaultenv_sama5d3_xplained);
 
-	add_generic_device("at91sam9-smc", DEVICE_ID_SINGLE, NULL,
-			   SAMA5D3_BASE_HSMC + 0x600, 0xa0,
-			   IORESOURCE_MEM, NULL);
-
-	clk = clk_lookup("hsmc_clk");
-	if (IS_ERR(clk))
-		dev_warn(dev, "couldn't get hsmc_clk: %pe\n", clk);
-
-	clk_enable(clk);
-
-	/* configure chip-select 3 (NAND) */
-	sama5_smc_configure(0, 3, &sama5d3_xplained_nand_smc_config);
-
 	return 0;
 }
 
diff --git a/arch/arm/mach-at91/Kconfig b/arch/arm/mach-at91/Kconfig
index db79ad2d26..22ab99d9c8 100644
--- a/arch/arm/mach-at91/Kconfig
+++ b/arch/arm/mach-at91/Kconfig
@@ -107,7 +107,6 @@ config SOC_SAMA5D2
 config SOC_SAMA5D3
 	bool
 	select SOC_SAMA5
-	select AT91SAM9_SMC
 	select CLOCKSOURCE_ATMEL_PIT
 	select HAVE_AT91_SMD
 	select HAVE_AT91_USB_CLK
diff --git a/arch/arm/mach-at91/sam9_smc.c b/arch/arm/mach-at91/sam9_smc.c
index 6c9e169a8e..66b30694ce 100644
--- a/arch/arm/mach-at91/sam9_smc.c
+++ b/arch/arm/mach-at91/sam9_smc.c
@@ -14,8 +14,7 @@
 
 #define AT91_SAM9_SMC_CS_STRIDE		0x10
 #define AT91_SAMA5_SMC_CS_STRIDE	0x14
-#define AT91_SMC_CS_STRIDE	((at91_soc_initdata.type == AT91_SOC_SAMA5D3 \
-				 || at91_soc_initdata.type == AT91_SOC_SAMA5D4) \
+#define AT91_SMC_CS_STRIDE	((at91_soc_initdata.type == AT91_SOC_SAMA5D4) \
 				 ? AT91_SAMA5_SMC_CS_STRIDE : AT91_SAM9_SMC_CS_STRIDE)
 #define AT91_SMC_CS(id, n)	(smc_base_addr[id] + ((n) * AT91_SMC_CS_STRIDE))
 
@@ -27,7 +26,6 @@ static void sam9_smc_cs_write_mode(void __iomem *base,
 	void __iomem *mode_reg;
 
 	switch (at91_soc_initdata.type) {
-	case AT91_SOC_SAMA5D3:
 	case AT91_SOC_SAMA5D4:
 		mode_reg = base + AT91_SAMA5_SMC_MODE;
 		break;
@@ -101,7 +99,6 @@ static void sam9_smc_cs_read_mode(void __iomem *base,
 	void __iomem *mode_reg;
 
 	switch (at91_soc_initdata.type) {
-	case AT91_SOC_SAMA5D3:
 	case AT91_SOC_SAMA5D4:
 		mode_reg = base + AT91_SAMA5_SMC_MODE;
 		break;
-- 
2.39.1