[PATCH 4/6] ARM: integrator: move flash registration to device tree
Linus Walleij
linus.walleij at linaro.org
Tue Jan 26 03:12:03 PST 2016
The flash on the Integrator was already defined by the device
tree, but VPP control and flash protection was in the
boardfiles. Simply add the compatible string
"arm,versatile-flash" and the special add-on code for flash
programming voltage and protection kicks in in the MTD
layer.
Remove the board file code and augment the device tree in
one go for seamless transition.
Cc: Grant Likely <grant.likely at linaro.org>
Cc: Rob Herring <robh at kernel.org>
Cc: Arnd Bergmann <arnd at arndb.de>
Signed-off-by: Linus Walleij <linus.walleij at linaro.org>
---
arch/arm/boot/dts/integrator.dtsi | 3 +-
arch/arm/mach-integrator/integrator_ap.c | 62 --------------------------------
arch/arm/mach-integrator/integrator_cp.c | 51 --------------------------
3 files changed, 2 insertions(+), 114 deletions(-)
diff --git a/arch/arm/boot/dts/integrator.dtsi b/arch/arm/boot/dts/integrator.dtsi
index 3807d4f46ef7..adc4befea46d 100644
--- a/arch/arm/boot/dts/integrator.dtsi
+++ b/arch/arm/boot/dts/integrator.dtsi
@@ -52,8 +52,9 @@
};
flash at 24000000 {
- compatible = "cfi-flash";
+ compatible = "arm,versatile-flash", "cfi-flash";
reg = <0x24000000 0x02000000>;
+ bank-width = <4>;
};
fpga {
diff --git a/arch/arm/mach-integrator/integrator_ap.c b/arch/arm/mach-integrator/integrator_ap.c
index 5b0e363fe5ba..2b118f20c62c 100644
--- a/arch/arm/mach-integrator/integrator_ap.c
+++ b/arch/arm/mach-integrator/integrator_ap.c
@@ -29,7 +29,6 @@
#include <linux/amba/kmi.h>
#include <linux/io.h>
#include <linux/irqchip.h>
-#include <linux/mtd/physmap.h>
#include <linux/platform_data/clk-integrator.h>
#include <linux/of_irq.h>
#include <linux/of_address.h>
@@ -147,65 +146,6 @@ static int __init irq_syscore_init(void)
device_initcall(irq_syscore_init);
/*
- * Flash handling.
- */
-static int ap_flash_init(struct platform_device *dev)
-{
- u32 tmp;
-
- writel(INTEGRATOR_SC_CTRL_nFLVPPEN | INTEGRATOR_SC_CTRL_nFLWP,
- ap_syscon_base + INTEGRATOR_SC_CTRLC_OFFSET);
-
- tmp = readl(ebi_base + INTEGRATOR_EBI_CSR1_OFFSET) |
- INTEGRATOR_EBI_WRITE_ENABLE;
- writel(tmp, ebi_base + INTEGRATOR_EBI_CSR1_OFFSET);
-
- if (!(readl(ebi_base + INTEGRATOR_EBI_CSR1_OFFSET)
- & INTEGRATOR_EBI_WRITE_ENABLE)) {
- writel(0xa05f, ebi_base + INTEGRATOR_EBI_LOCK_OFFSET);
- writel(tmp, ebi_base + INTEGRATOR_EBI_CSR1_OFFSET);
- writel(0, ebi_base + INTEGRATOR_EBI_LOCK_OFFSET);
- }
- return 0;
-}
-
-static void ap_flash_exit(struct platform_device *dev)
-{
- u32 tmp;
-
- writel(INTEGRATOR_SC_CTRL_nFLVPPEN | INTEGRATOR_SC_CTRL_nFLWP,
- ap_syscon_base + INTEGRATOR_SC_CTRLC_OFFSET);
-
- tmp = readl(ebi_base + INTEGRATOR_EBI_CSR1_OFFSET) &
- ~INTEGRATOR_EBI_WRITE_ENABLE;
- writel(tmp, ebi_base + INTEGRATOR_EBI_CSR1_OFFSET);
-
- if (readl(ebi_base + INTEGRATOR_EBI_CSR1_OFFSET) &
- INTEGRATOR_EBI_WRITE_ENABLE) {
- writel(0xa05f, ebi_base + INTEGRATOR_EBI_LOCK_OFFSET);
- writel(tmp, ebi_base + INTEGRATOR_EBI_CSR1_OFFSET);
- writel(0, ebi_base + INTEGRATOR_EBI_LOCK_OFFSET);
- }
-}
-
-static void ap_flash_set_vpp(struct platform_device *pdev, int on)
-{
- if (on)
- writel(INTEGRATOR_SC_CTRL_nFLVPPEN,
- ap_syscon_base + INTEGRATOR_SC_CTRLS_OFFSET);
- else
- writel(INTEGRATOR_SC_CTRL_nFLVPPEN,
- ap_syscon_base + INTEGRATOR_SC_CTRLC_OFFSET);
-}
-
-static struct physmap_flash_data ap_flash_data = {
- .width = 4,
- .init = ap_flash_init,
- .exit = ap_flash_exit,
- .set_vpp = ap_flash_set_vpp,
-};
-
-/*
* For the PL010 found in the Integrator/AP some of the UART control is
* implemented in the system controller and accessed using a callback
* from the driver.
@@ -266,8 +206,6 @@ static struct of_dev_auxdata ap_auxdata_lookup[] __initdata = {
"kmi0", NULL),
OF_DEV_AUXDATA("arm,primecell", KMI1_BASE,
"kmi1", NULL),
- OF_DEV_AUXDATA("cfi-flash", INTEGRATOR_FLASH_BASE,
- "physmap-flash", &ap_flash_data),
{ /* sentinel */ },
};
diff --git a/arch/arm/mach-integrator/integrator_cp.c b/arch/arm/mach-integrator/integrator_cp.c
index b5fb71a36ee6..6f6b051e81e0 100644
--- a/arch/arm/mach-integrator/integrator_cp.c
+++ b/arch/arm/mach-integrator/integrator_cp.c
@@ -23,7 +23,6 @@
#include <linux/io.h>
#include <linux/irqchip.h>
#include <linux/gfp.h>
-#include <linux/mtd/physmap.h>
#include <linux/of_irq.h>
#include <linux/of_address.h>
#include <linux/of_platform.h>
@@ -43,14 +42,8 @@
/* Base address to the CP controller */
static void __iomem *intcp_con_base;
-#define INTCP_PA_FLASH_BASE 0x24000000
-
#define INTCP_PA_CLCD_BASE 0xc0000000
-#define INTCP_FLASHPROG 0x04
-#define CINTEGRATOR_FLASHPROG_FLVPPEN (1 << 0)
-#define CINTEGRATOR_FLASHPROG_FLWREN (1 << 1)
-
/*
* Logical Physical
* f1000000 10000000 Core module registers
@@ -108,48 +101,6 @@ static void __init intcp_map_io(void)
}
/*
- * Flash handling.
- */
-static int intcp_flash_init(struct platform_device *dev)
-{
- u32 val;
-
- val = readl(intcp_con_base + INTCP_FLASHPROG);
- val |= CINTEGRATOR_FLASHPROG_FLWREN;
- writel(val, intcp_con_base + INTCP_FLASHPROG);
-
- return 0;
-}
-
-static void intcp_flash_exit(struct platform_device *dev)
-{
- u32 val;
-
- val = readl(intcp_con_base + INTCP_FLASHPROG);
- val &= ~(CINTEGRATOR_FLASHPROG_FLVPPEN|CINTEGRATOR_FLASHPROG_FLWREN);
- writel(val, intcp_con_base + INTCP_FLASHPROG);
-}
-
-static void intcp_flash_set_vpp(struct platform_device *pdev, int on)
-{
- u32 val;
-
- val = readl(intcp_con_base + INTCP_FLASHPROG);
- if (on)
- val |= CINTEGRATOR_FLASHPROG_FLVPPEN;
- else
- val &= ~CINTEGRATOR_FLASHPROG_FLVPPEN;
- writel(val, intcp_con_base + INTCP_FLASHPROG);
-}
-
-static struct physmap_flash_data intcp_flash_data = {
- .width = 4,
- .init = intcp_flash_init,
- .exit = intcp_flash_exit,
- .set_vpp = intcp_flash_set_vpp,
-};
-
-/*
* It seems that the card insertion interrupt remains active after
* we've acknowledged it. We therefore ignore the interrupt, and
* rely on reading it from the SIC. This also means that we must
@@ -260,8 +211,6 @@ static struct of_dev_auxdata intcp_auxdata_lookup[] __initdata = {
"aaci", &mmc_data),
OF_DEV_AUXDATA("arm,primecell", INTCP_PA_CLCD_BASE,
"clcd", &clcd_data),
- OF_DEV_AUXDATA("cfi-flash", INTCP_PA_FLASH_BASE,
- "physmap-flash", &intcp_flash_data),
{ /* sentinel */ },
};
--
2.4.3
More information about the linux-mtd
mailing list