[PATCH v2 1/3] ARM: dts: dra7-evm: Remove pinmux configurations for erratum i869

[Sekhar Nori <nsekhar@ti.com>]

Pinmuxing for DRA7x/AM57x family of processors need to be done in IO
isolation as part of initial bootloader executed from SRAM. This is
done as part of iodelay configuration sequence and is required due
to the limitations introduced by erratum ID: i869[1] (IO Glitches
can occur when changing IO settings) and elaborated in the Technical
Reference Manual[2] 18.4.6.1.7 Isolation Requirements.

Only peripheral that is permitted for dynamic pin mux configuration
is MMC and DCAN. MMC is permitted to change to accommodate the
requirements for varied speeds (which require IO-delay support in
kernel as well). DCAN is a result of i893[1] (DCAN initialization
sequence).

DCAN pinmux is retained in this patch. MMC pinmux is missing from
the dra7-evm.dts file and the board is relying on configuration done
by bootloader. A subsequent patch will add MMC pinmux configuration.

A side-effect of this patch is that NAND support is removed. NAND
pins clash with VOUT3 on DRA7-EVM. U-Boot selects VOUT3 over NAND
as per TI EVM application needs.

[1] http://www.ti.com/lit/pdf/sprz429
[2] http://www.ti.com/lit/pdf/sprui30

Signed-off-by: Sekhar Nori <nsekhar@ti.com>
---
 arch/arm/boot/dts/dra7-evm.dts | 267 +----------------------------------------
 1 file changed, 6 insertions(+), 261 deletions(-)

diff --git a/arch/arm/boot/dts/dra7-evm.dts b/arch/arm/boot/dts/dra7-evm.dts
index 132f2be10889..80ebfd6a5c7b 100644
--- a/arch/arm/boot/dts/dra7-evm.dts
+++ b/arch/arm/boot/dts/dra7-evm.dts
@@ -151,204 +151,6 @@
 };
 
 &dra7_pmx_core {
-	pinctrl-names = "default";
-	pinctrl-0 = <&vtt_pin>;
-
-	vtt_pin: pinmux_vtt_pin {
-		pinctrl-single,pins = <
-			DRA7XX_CORE_IOPAD(0x37b4, PIN_OUTPUT | MUX_MODE14) /* spi1_cs1.gpio7_11 */
-		>;
-	};
-
-	i2c1_pins: pinmux_i2c1_pins {
-		pinctrl-single,pins = <
-			DRA7XX_CORE_IOPAD(0x3800, PIN_INPUT | MUX_MODE0) /* i2c1_sda */
-			DRA7XX_CORE_IOPAD(0x3804, PIN_INPUT | MUX_MODE0) /* i2c1_scl */
-		>;
-	};
-
-	i2c2_pins: pinmux_i2c2_pins {
-		pinctrl-single,pins = <
-			DRA7XX_CORE_IOPAD(0x3808, PIN_INPUT | MUX_MODE0) /* i2c2_sda */
-			DRA7XX_CORE_IOPAD(0x380c, PIN_INPUT | MUX_MODE0) /* i2c2_scl */
-		>;
-	};
-
-	i2c3_pins: pinmux_i2c3_pins {
-		pinctrl-single,pins = <
-			DRA7XX_CORE_IOPAD(0x3688, PIN_INPUT | MUX_MODE9) /* gpio6_14.i2c3_sda */
-			DRA7XX_CORE_IOPAD(0x368c, PIN_INPUT | MUX_MODE9) /* gpio6_15.i2c3_scl */
-		>;
-	};
-
-	mcspi1_pins: pinmux_mcspi1_pins {
-		pinctrl-single,pins = <
-			DRA7XX_CORE_IOPAD(0x37a4, PIN_INPUT | MUX_MODE0) /* spi1_sclk */
-			DRA7XX_CORE_IOPAD(0x37a8, PIN_INPUT | MUX_MODE0) /* spi1_d1 */
-			DRA7XX_CORE_IOPAD(0x37ac, PIN_INPUT | MUX_MODE0) /* spi1_d0 */
-			DRA7XX_CORE_IOPAD(0x37b0, PIN_INPUT_SLEW | MUX_MODE0) /* spi1_cs0 */
-			DRA7XX_CORE_IOPAD(0x37b8, PIN_INPUT_SLEW | MUX_MODE6) /* spi1_cs2.hdmi1_hpd */
-			DRA7XX_CORE_IOPAD(0x37bc, PIN_INPUT_SLEW | MUX_MODE6) /* spi1_cs3.hdmi1_cec */
-		>;
-	};
-
-	mcspi2_pins: pinmux_mcspi2_pins {
-		pinctrl-single,pins = <
-			DRA7XX_CORE_IOPAD(0x37c0, PIN_INPUT | MUX_MODE0) /* spi2_sclk */
-			DRA7XX_CORE_IOPAD(0x37c4, PIN_INPUT_SLEW | MUX_MODE0) /* spi2_d1 */
-			DRA7XX_CORE_IOPAD(0x37c8, PIN_INPUT_SLEW | MUX_MODE0) /* spi2_d1 */
-			DRA7XX_CORE_IOPAD(0x37cc, PIN_INPUT_SLEW | MUX_MODE0) /* spi2_cs0 */
-		>;
-	};
-
-	uart1_pins: pinmux_uart1_pins {
-		pinctrl-single,pins = <
-			DRA7XX_CORE_IOPAD(0x37e0, PIN_INPUT_SLEW | MUX_MODE0) /* uart1_rxd */
-			DRA7XX_CORE_IOPAD(0x37e4, PIN_INPUT_SLEW | MUX_MODE0) /* uart1_txd */
-			DRA7XX_CORE_IOPAD(0x37e8, PIN_INPUT | MUX_MODE3) /* uart1_ctsn */
-			DRA7XX_CORE_IOPAD(0x37ec, PIN_INPUT | MUX_MODE3) /* uart1_rtsn */
-		>;
-	};
-
-	uart2_pins: pinmux_uart2_pins {
-		pinctrl-single,pins = <
-			DRA7XX_CORE_IOPAD(0x37f0, PIN_INPUT | MUX_MODE0) /* uart2_rxd */
-			DRA7XX_CORE_IOPAD(0x37f4, PIN_INPUT | MUX_MODE0) /* uart2_txd */
-			DRA7XX_CORE_IOPAD(0x37f8, PIN_INPUT | MUX_MODE0) /* uart2_ctsn */
-			DRA7XX_CORE_IOPAD(0x37fc, PIN_INPUT | MUX_MODE0) /* uart2_rtsn */
-		>;
-	};
-
-	uart3_pins: pinmux_uart3_pins {
-		pinctrl-single,pins = <
-			DRA7XX_CORE_IOPAD(0x3648, PIN_INPUT_SLEW | MUX_MODE0) /* uart3_rxd */
-			DRA7XX_CORE_IOPAD(0x364c, PIN_INPUT_SLEW | MUX_MODE0) /* uart3_txd */
-		>;
-	};
-
-	usb1_pins: pinmux_usb1_pins {
-                pinctrl-single,pins = <
-			DRA7XX_CORE_IOPAD(0x3680, PIN_INPUT_SLEW | MUX_MODE0) /* usb1_drvvbus */
-                >;
-        };
-
-	usb2_pins: pinmux_usb2_pins {
-                pinctrl-single,pins = <
-			DRA7XX_CORE_IOPAD(0x3684, PIN_INPUT_SLEW | MUX_MODE0) /* usb2_drvvbus */
-                >;
-        };
-
-	nand_flash_x16: nand_flash_x16 {
-		/* On DRA7 EVM, GPMC_WPN and NAND_BOOTn comes from DIP switch
-		 * So NAND flash requires following switch settings:
-		 * SW5.1 (NAND_BOOTn) = ON (LOW)
-		 * SW5.9 (GPMC_WPN) = OFF (HIGH)
-		 */
-		pinctrl-single,pins = <
-			DRA7XX_CORE_IOPAD(0x3400, PIN_INPUT  | MUX_MODE0)	/* gpmc_ad0	*/
-			DRA7XX_CORE_IOPAD(0x3404, PIN_INPUT  | MUX_MODE0)	/* gpmc_ad1	*/
-			DRA7XX_CORE_IOPAD(0x3408, PIN_INPUT  | MUX_MODE0)	/* gpmc_ad2	*/
-			DRA7XX_CORE_IOPAD(0x340c, PIN_INPUT  | MUX_MODE0)	/* gpmc_ad3	*/
-			DRA7XX_CORE_IOPAD(0x3410, PIN_INPUT  | MUX_MODE0)	/* gpmc_ad4	*/
-			DRA7XX_CORE_IOPAD(0x3414, PIN_INPUT  | MUX_MODE0)	/* gpmc_ad5	*/
-			DRA7XX_CORE_IOPAD(0x3418, PIN_INPUT  | MUX_MODE0)	/* gpmc_ad6	*/
-			DRA7XX_CORE_IOPAD(0x341c, PIN_INPUT  | MUX_MODE0)	/* gpmc_ad7	*/
-			DRA7XX_CORE_IOPAD(0x3420, PIN_INPUT  | MUX_MODE0)	/* gpmc_ad8	*/
-			DRA7XX_CORE_IOPAD(0x3424, PIN_INPUT  | MUX_MODE0)	/* gpmc_ad9	*/
-			DRA7XX_CORE_IOPAD(0x3428, PIN_INPUT  | MUX_MODE0)	/* gpmc_ad10	*/
-			DRA7XX_CORE_IOPAD(0x342c, PIN_INPUT  | MUX_MODE0)	/* gpmc_ad11	*/
-			DRA7XX_CORE_IOPAD(0x3430, PIN_INPUT  | MUX_MODE0)	/* gpmc_ad12	*/
-			DRA7XX_CORE_IOPAD(0x3434, PIN_INPUT  | MUX_MODE0)	/* gpmc_ad13	*/
-			DRA7XX_CORE_IOPAD(0x3438, PIN_INPUT  | MUX_MODE0)	/* gpmc_ad14	*/
-			DRA7XX_CORE_IOPAD(0x343c, PIN_INPUT  | MUX_MODE0)	/* gpmc_ad15	*/
-			DRA7XX_CORE_IOPAD(0x34d8, PIN_INPUT_PULLUP  | MUX_MODE0)	/* gpmc_wait0	*/
-			DRA7XX_CORE_IOPAD(0x34cc, PIN_OUTPUT | MUX_MODE0)	/* gpmc_wen	*/
-			DRA7XX_CORE_IOPAD(0x34b4, PIN_OUTPUT_PULLUP | MUX_MODE0)	/* gpmc_csn0	*/
-			DRA7XX_CORE_IOPAD(0x34c4, PIN_OUTPUT | MUX_MODE0)	/* gpmc_advn_ale */
-			DRA7XX_CORE_IOPAD(0x34c8, PIN_OUTPUT | MUX_MODE0)	/* gpmc_oen_ren	 */
-			DRA7XX_CORE_IOPAD(0x34d0, PIN_OUTPUT | MUX_MODE0)	/* gpmc_be0n_cle */
-		>;
-	};
-
-	cpsw_default: cpsw_default {
-		pinctrl-single,pins = <
-			/* Slave 1 */
-			DRA7XX_CORE_IOPAD(0x3650, PIN_OUTPUT | MUX_MODE0)	/* rgmii0_txc.rgmii0_txc */
-			DRA7XX_CORE_IOPAD(0x3654, PIN_OUTPUT | MUX_MODE0)	/* rgmii0_txctl.rgmii0_txctl */
-			DRA7XX_CORE_IOPAD(0x3658, PIN_OUTPUT | MUX_MODE0)	/* rgmii0_td3.rgmii0_txd3 */
-			DRA7XX_CORE_IOPAD(0x365c, PIN_OUTPUT | MUX_MODE0)	/* rgmii0_txd2.rgmii0_txd2 */
-			DRA7XX_CORE_IOPAD(0x3660, PIN_OUTPUT | MUX_MODE0)	/* rgmii0_txd1.rgmii0_txd1 */
-			DRA7XX_CORE_IOPAD(0x3664, PIN_OUTPUT | MUX_MODE0)	/* rgmii0_txd0.rgmii0_txd0 */
-			DRA7XX_CORE_IOPAD(0x3668, PIN_INPUT | MUX_MODE0)	/* rgmii0_rxc.rgmii0_rxc */
-			DRA7XX_CORE_IOPAD(0x366c, PIN_INPUT | MUX_MODE0)	/* rgmii0_rxctl.rgmii0_rxctl */
-			DRA7XX_CORE_IOPAD(0x3670, PIN_INPUT | MUX_MODE0)	/* rgmii0_rxd3.rgmii0_rxd3 */
-			DRA7XX_CORE_IOPAD(0x3674, PIN_INPUT | MUX_MODE0)	/* rgmii0_rxd2.rgmii0_rxd2 */
-			DRA7XX_CORE_IOPAD(0x3678, PIN_INPUT | MUX_MODE0)	/* rgmii0_rxd1.rgmii0_rxd1 */
-			DRA7XX_CORE_IOPAD(0x367c, PIN_INPUT | MUX_MODE0)	/* rgmii0_rxd0.rgmii0_rxd0 */
-
-			/* Slave 2 */
-			DRA7XX_CORE_IOPAD(0x3598, PIN_OUTPUT | MUX_MODE3)	/* vin2a_d12.rgmii1_txc */
-			DRA7XX_CORE_IOPAD(0x359c, PIN_OUTPUT | MUX_MODE3)	/* vin2a_d13.rgmii1_tctl */
-			DRA7XX_CORE_IOPAD(0x35a0, PIN_OUTPUT | MUX_MODE3)	/* vin2a_d14.rgmii1_td3 */
-			DRA7XX_CORE_IOPAD(0x35a4, PIN_OUTPUT | MUX_MODE3)	/* vin2a_d15.rgmii1_td2 */
-			DRA7XX_CORE_IOPAD(0x35a8, PIN_OUTPUT | MUX_MODE3)	/* vin2a_d16.rgmii1_td1 */
-			DRA7XX_CORE_IOPAD(0x35ac, PIN_OUTPUT | MUX_MODE3)	/* vin2a_d17.rgmii1_td0 */
-			DRA7XX_CORE_IOPAD(0x35b0, PIN_INPUT | MUX_MODE3)	/* vin2a_d18.rgmii1_rclk */
-			DRA7XX_CORE_IOPAD(0x35b4, PIN_INPUT | MUX_MODE3)	/* vin2a_d19.rgmii1_rctl */
-			DRA7XX_CORE_IOPAD(0x35b8, PIN_INPUT | MUX_MODE3)	/* vin2a_d20.rgmii1_rd3 */
-			DRA7XX_CORE_IOPAD(0x35bc, PIN_INPUT | MUX_MODE3)	/* vin2a_d21.rgmii1_rd2 */
-			DRA7XX_CORE_IOPAD(0x35c0, PIN_INPUT | MUX_MODE3)	/* vin2a_d22.rgmii1_rd1 */
-			DRA7XX_CORE_IOPAD(0x35c4, PIN_INPUT | MUX_MODE3)	/* vin2a_d23.rgmii1_rd0 */
-		>;
-
-	};
-
-	cpsw_sleep: cpsw_sleep {
-		pinctrl-single,pins = <
-			/* Slave 1 */
-			DRA7XX_CORE_IOPAD(0x3650, MUX_MODE15)
-			DRA7XX_CORE_IOPAD(0x3654, MUX_MODE15)
-			DRA7XX_CORE_IOPAD(0x3658, MUX_MODE15)
-			DRA7XX_CORE_IOPAD(0x365c, MUX_MODE15)
-			DRA7XX_CORE_IOPAD(0x3660, MUX_MODE15)
-			DRA7XX_CORE_IOPAD(0x3664, MUX_MODE15)
-			DRA7XX_CORE_IOPAD(0x3668, MUX_MODE15)
-			DRA7XX_CORE_IOPAD(0x366c, MUX_MODE15)
-			DRA7XX_CORE_IOPAD(0x3670, MUX_MODE15)
-			DRA7XX_CORE_IOPAD(0x3674, MUX_MODE15)
-			DRA7XX_CORE_IOPAD(0x3678, MUX_MODE15)
-			DRA7XX_CORE_IOPAD(0x367c, MUX_MODE15)
-
-			/* Slave 2 */
-			DRA7XX_CORE_IOPAD(0x3598, MUX_MODE15)
-			DRA7XX_CORE_IOPAD(0x359c, MUX_MODE15)
-			DRA7XX_CORE_IOPAD(0x35a0, MUX_MODE15)
-			DRA7XX_CORE_IOPAD(0x35a4, MUX_MODE15)
-			DRA7XX_CORE_IOPAD(0x35a8, MUX_MODE15)
-			DRA7XX_CORE_IOPAD(0x35ac, MUX_MODE15)
-			DRA7XX_CORE_IOPAD(0x35b0, MUX_MODE15)
-			DRA7XX_CORE_IOPAD(0x35b4, MUX_MODE15)
-			DRA7XX_CORE_IOPAD(0x35b8, MUX_MODE15)
-			DRA7XX_CORE_IOPAD(0x35bc, MUX_MODE15)
-			DRA7XX_CORE_IOPAD(0x35c0, MUX_MODE15)
-			DRA7XX_CORE_IOPAD(0x35c4, MUX_MODE15)
-		>;
-	};
-
-	davinci_mdio_default: davinci_mdio_default {
-		pinctrl-single,pins = <
-			DRA7XX_CORE_IOPAD(0x363c, PIN_OUTPUT_PULLUP | MUX_MODE0)	/* mdio_d.mdio_d */
-			DRA7XX_CORE_IOPAD(0x3640, PIN_INPUT_PULLUP | MUX_MODE0)	/* mdio_clk.mdio_clk */
-		>;
-	};
-
-	davinci_mdio_sleep: davinci_mdio_sleep {
-		pinctrl-single,pins = <
-			DRA7XX_CORE_IOPAD(0x363c, MUX_MODE15)
-			DRA7XX_CORE_IOPAD(0x3640, MUX_MODE15)
-		>;
-	};
-
 	dcan1_pins_default: dcan1_pins_default {
 		pinctrl-single,pins = <
 			DRA7XX_CORE_IOPAD(0x37d0, PIN_OUTPUT_PULLUP | MUX_MODE0) /* dcan1_tx */
@@ -362,37 +164,10 @@
 			DRA7XX_CORE_IOPAD(0x3818, MUX_MODE15 | PULL_UP)	/* wakeup0.off */
 		>;
 	};
-
-	atl_pins: pinmux_atl_pins {
-		pinctrl-single,pins = <
-			DRA7XX_CORE_IOPAD(0x3698, PIN_OUTPUT | MUX_MODE5)	/* xref_clk1.atl_clk1 */
-			DRA7XX_CORE_IOPAD(0x369c, PIN_OUTPUT | MUX_MODE5)	/* xref_clk2.atl_clk2 */
-		>;
-	};
-
-	mcasp3_pins: pinmux_mcasp3_pins {
-		pinctrl-single,pins = <
-			DRA7XX_CORE_IOPAD(0x3724, PIN_OUTPUT_PULLDOWN | MUX_MODE0)	/* mcasp3_aclkx */
-			DRA7XX_CORE_IOPAD(0x3728, PIN_OUTPUT_PULLDOWN | MUX_MODE0)	/* mcasp3_fsx */
-			DRA7XX_CORE_IOPAD(0x372c, PIN_OUTPUT_PULLDOWN | MUX_MODE0)	/* mcasp3_axr0 */
-			DRA7XX_CORE_IOPAD(0x3730, PIN_INPUT_PULLDOWN | MUX_MODE0)	/* mcasp3_axr1 */
-		>;
-	};
-
-	mcasp3_sleep_pins: pinmux_mcasp3_sleep_pins {
-		pinctrl-single,pins = <
-			DRA7XX_CORE_IOPAD(0x3724, MUX_MODE15)
-			DRA7XX_CORE_IOPAD(0x3728, MUX_MODE15)
-			DRA7XX_CORE_IOPAD(0x372c, MUX_MODE15)
-			DRA7XX_CORE_IOPAD(0x3730, MUX_MODE15)
-		>;
-	};
 };
 
 &i2c1 {
 	status = "okay";
-	pinctrl-names = "default";
-	pinctrl-0 = <&i2c1_pins>;
 	clock-frequency = <400000>;
 
 	tps659038: tps659038@58 {
@@ -581,8 +356,6 @@
 
 &i2c2 {
 	status = "okay";
-	pinctrl-names = "default";
-	pinctrl-0 = <&i2c2_pins>;
 	clock-frequency = <400000>;
 
 	pcf_hdmi: gpio@26 {
@@ -602,41 +375,29 @@
 
 &i2c3 {
 	status = "okay";
-	pinctrl-names = "default";
-	pinctrl-0 = <&i2c3_pins>;
 	clock-frequency = <400000>;
 };
 
 &mcspi1 {
 	status = "okay";
-	pinctrl-names = "default";
-	pinctrl-0 = <&mcspi1_pins>;
 };
 
 &mcspi2 {
 	status = "okay";
-	pinctrl-names = "default";
-	pinctrl-0 = <&mcspi2_pins>;
 };
 
 &uart1 {
 	status = "okay";
-	pinctrl-names = "default";
-	pinctrl-0 = <&uart1_pins>;
 	interrupts-extended = <&crossbar_mpu GIC_SPI 67 IRQ_TYPE_LEVEL_HIGH>,
 			      <&dra7_pmx_core 0x3e0>;
 };
 
 &uart2 {
 	status = "okay";
-	pinctrl-names = "default";
-	pinctrl-0 = <&uart2_pins>;
 };
 
 &uart3 {
 	status = "okay";
-	pinctrl-names = "default";
-	pinctrl-0 = <&uart3_pins>;
 };
 
 &mmc1 {
@@ -732,14 +493,10 @@
 
 &usb1 {
 	dr_mode = "peripheral";
-	pinctrl-names = "default";
-	pinctrl-0 = <&usb1_pins>;
 };
 
 &usb2 {
 	dr_mode = "host";
-	pinctrl-names = "default";
-	pinctrl-0 = <&usb2_pins>;
 };
 
 &elm {
@@ -747,9 +504,12 @@
 };
 
 &gpmc {
-	status = "okay";
-	pinctrl-names = "default";
-	pinctrl-0 = <&nand_flash_x16>;
+	/*
+	* For the existing IOdelay configuration via U-Boot we don't
+	* support NAND on dra7-evm. Keep it disabled. Enabling it
+	* requires a different configuration by U-Boot.
+	*/
+	status = "disabled";
 	ranges = <0 0 0x08000000 0x01000000>;	/* minimum GPMC partition = 16MB */
 	nand@0,0 {
 		compatible = "ti,omap2-nand";
@@ -845,9 +605,6 @@
 
 &mac {
 	status = "okay";
-	pinctrl-names = "default", "sleep";
-	pinctrl-0 = <&cpsw_default>;
-	pinctrl-1 = <&cpsw_sleep>;
 	dual_emac;
 };
 
@@ -863,12 +620,6 @@
 	dual_emac_res_vlan = <2>;
 };
 
-&davinci_mdio {
-	pinctrl-names = "default", "sleep";
-	pinctrl-0 = <&davinci_mdio_default>;
-	pinctrl-1 = <&davinci_mdio_sleep>;
-};
-
 &dcan1 {
 	status = "ok";
 	pinctrl-names = "default", "sleep", "active";
@@ -878,9 +629,6 @@
 };
 
 &atl {
-	pinctrl-names = "default";
-	pinctrl-0 = <&atl_pins>;
-
 	assigned-clocks = <&abe_dpll_sys_clk_mux>,
 			  <&atl_gfclk_mux>,
 			  <&dpll_abe_ck>,
@@ -899,9 +647,6 @@
 
 &mcasp3 {
 	#sound-dai-cells = <0>;
-	pinctrl-names = "default", "sleep";
-	pinctrl-0 = <&mcasp3_pins>;
-	pinctrl-1 = <&mcasp3_sleep_pins>;
 
 	assigned-clocks = <&mcasp3_ahclkx_mux>;
 	assigned-clock-parents = <&atl_clkin2_ck>;
-- 
2.9.0