From 83a21727c3fb23844de38f85fb4250bd21961c25 Mon Sep 17 00:00:00 2001 From: Helmut Buchsbaum Date: Sun, 26 Apr 2015 11:32:47 +0200 Subject: [PATCH] pinctrl: zynq: configure SPI SSx pins separately MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Since SCLK, MISO and MOSI are the only mandatory signals at Zynq's SPI interfaces, SS0, SS1 and SS2 have to be configured separately as they may be used as simple GPIO lines. This, of course, has to be considered in the devicetree, so pin controller configuration for e.g. an SPI0 using SS0 and SS1 only might look like the following snippet (derived from the example of chapter "17.5.3 MIO/EMIO" Routing of Zynq-7000 TRM UG585). So MIO20 can now be used as GPIO instead of being occupied by SPI0 SS2 function. Note the separate pinmux function for the slave select signals: pinctrl_spi0_default: spi0-default { mux_spi { function = "spi0"; groups = "spi0_0_grp"; }; mux_ss { function = "spi0_ss"; groups = "spi0_0_ss0_grp", "spi0_0_ss1_grp"; } conf-output { pins = "MIO16", "MIO21"; slew-rate = <0>; bias-disable; low-power-disable; io-standard = <1>; }; conf-input { pins = "MIO17"; slew-rate = <0>; bias-high-impedance; low-power-disable; io-standard = <1>; }; conf-select { pins = "MIO18", "MIO19"; slew-rate = <0>; bias-pull-up; low-power-disable; io-standard = <1>; }; }; pinctrl_gpio0_default { mux { function = "gpio0"; groups = "gpio0_20_grp" }; conf { pins = "MIO20"; slew-rate = <0>; bias-pull-up; low-power-disable; io-standard = <1>; }; }; Signed-off-by: Helmut Buchsbaum Acked-by: Sören Brinkmann Signed-off-by: Linus Walleij --- .../bindings/pinctrl/xlnx,zynq-pinctrl.txt | 7 +- drivers/pinctrl/pinctrl-zynq.c | 70 +++++++++++++++++-- 2 files changed, 67 insertions(+), 10 deletions(-) diff --git a/Documentation/devicetree/bindings/pinctrl/xlnx,zynq-pinctrl.txt b/Documentation/devicetree/bindings/pinctrl/xlnx,zynq-pinctrl.txt index b7b55a964f65..f488b0f77406 100644 --- a/Documentation/devicetree/bindings/pinctrl/xlnx,zynq-pinctrl.txt +++ b/Documentation/devicetree/bindings/pinctrl/xlnx,zynq-pinctrl.txt @@ -45,8 +45,9 @@ to specify in a pinconf subnode: Valid values for groups are: ethernet0_0_grp, ethernet1_0_grp, mdio0_0_grp, mdio1_0_grp, - qspi0_0_grp, qspi1_0_grp, qspi_fbclk, qspi_cs1_grp, spi0_0_grp, - spi0_1_grp - spi0_2_grp, spi1_0_grp - spi1_3_grp, sdio0_0_grp - sdio0_2_grp, + qspi0_0_grp, qspi1_0_grp, qspi_fbclk, qspi_cs1_grp, spi0_0_grp - spi0_2_grp, + spi0_X_ssY (X=0..2, Y=0..2), spi1_0_grp - spi1_3_grp, + spi1_X_ssY (X=0..3, Y=0..2), sdio0_0_grp - sdio0_2_grp, sdio1_0_grp - sdio1_3_grp, sdio0_emio_wp, sdio0_emio_cd, sdio1_emio_wp, sdio1_emio_cd, smc0_nor, smc0_nor_cs1_grp, smc0_nor_addr25_grp, smc0_nand, can0_0_grp - can0_10_grp, can1_0_grp - can1_11_grp, uart0_0_grp - uart0_10_grp, @@ -59,7 +60,7 @@ to specify in a pinconf subnode: Valid values for function are: ethernet0, ethernet1, mdio0, mdio1, qspi0, qspi1, qspi_fbclk, qspi_cs1, - spi0, spi1, sdio0, sdio0_pc, sdio0_cd, sdio0_wp, + spi0, spi0_ss, spi1, spi1_ss, sdio0, sdio0_pc, sdio0_cd, sdio0_wp, sdio1, sdio1_pc, sdio1_cd, sdio1_wp, smc0_nor, smc0_nor_cs1, smc0_nor_addr25, smc0_nand, can0, can1, uart0, uart1, i2c0, i2c1, ttc0, ttc1, swdt0, gpio0, usb0, usb1 diff --git a/drivers/pinctrl/pinctrl-zynq.c b/drivers/pinctrl/pinctrl-zynq.c index 22280bddb9e2..af726b906656 100644 --- a/drivers/pinctrl/pinctrl-zynq.c +++ b/drivers/pinctrl/pinctrl-zynq.c @@ -101,6 +101,8 @@ enum zynq_pinmux_functions { ZYNQ_PMUX_qspi_cs1, ZYNQ_PMUX_spi0, ZYNQ_PMUX_spi1, + ZYNQ_PMUX_spi0_ss, + ZYNQ_PMUX_spi1_ss, ZYNQ_PMUX_sdio0, ZYNQ_PMUX_sdio0_pc, ZYNQ_PMUX_sdio0_cd, @@ -196,13 +198,35 @@ static const unsigned int qspi0_0_pins[] = {1, 2, 3, 4, 5, 6}; static const unsigned int qspi1_0_pins[] = {9, 10, 11, 12, 13}; static const unsigned int qspi_cs1_pins[] = {0}; static const unsigned int qspi_fbclk_pins[] = {8}; -static const unsigned int spi0_0_pins[] = {16, 17, 18, 19, 20, 21}; -static const unsigned int spi0_1_pins[] = {28, 29, 30, 31, 32, 33}; -static const unsigned int spi0_2_pins[] = {40, 41, 42, 43, 44, 45}; -static const unsigned int spi1_0_pins[] = {10, 11, 12, 13, 14, 15}; -static const unsigned int spi1_1_pins[] = {22, 23, 24, 25, 26, 27}; -static const unsigned int spi1_2_pins[] = {34, 35, 36, 37, 38, 39}; -static const unsigned int spi1_3_pins[] = {46, 47, 48, 49, 40, 51}; +static const unsigned int spi0_0_pins[] = {16, 17, 21}; +static const unsigned int spi0_0_ss0_pins[] = {18}; +static const unsigned int spi0_0_ss1_pins[] = {19}; +static const unsigned int spi0_0_ss2_pins[] = {20,}; +static const unsigned int spi0_1_pins[] = {28, 29, 33}; +static const unsigned int spi0_1_ss0_pins[] = {30}; +static const unsigned int spi0_1_ss1_pins[] = {31}; +static const unsigned int spi0_1_ss2_pins[] = {32}; +static const unsigned int spi0_2_pins[] = {40, 41, 45}; +static const unsigned int spi0_2_ss0_pins[] = {42}; +static const unsigned int spi0_2_ss1_pins[] = {43}; +static const unsigned int spi0_2_ss2_pins[] = {44}; +static const unsigned int spi1_0_pins[] = {10, 11, 12}; +static const unsigned int spi1_0_ss0_pins[] = {13}; +static const unsigned int spi1_0_ss1_pins[] = {14}; +static const unsigned int spi1_0_ss2_pins[] = {15}; +static const unsigned int spi1_1_pins[] = {22, 23, 24}; +static const unsigned int spi1_1_ss0_pins[] = {25}; +static const unsigned int spi1_1_ss1_pins[] = {26}; +static const unsigned int spi1_1_ss2_pins[] = {27}; +static const unsigned int spi1_2_pins[] = {34, 35, 36}; +static const unsigned int spi1_2_ss0_pins[] = {37}; +static const unsigned int spi1_2_ss1_pins[] = {38}; +static const unsigned int spi1_2_ss2_pins[] = {39}; +static const unsigned int spi1_3_pins[] = {46, 47, 48, 49}; +static const unsigned int spi1_3_ss0_pins[] = {49}; +static const unsigned int spi1_3_ss1_pins[] = {50}; +static const unsigned int spi1_3_ss2_pins[] = {51}; + static const unsigned int sdio0_0_pins[] = {16, 17, 18, 19, 20, 21}; static const unsigned int sdio0_1_pins[] = {28, 29, 30, 31, 32, 33}; static const unsigned int sdio0_2_pins[] = {40, 41, 42, 43, 44, 45}; @@ -379,12 +403,33 @@ struct zynq_pctrl_group zynq_pctrl_groups[] = { DEFINE_ZYNQ_PINCTRL_GRP(qspi_fbclk), DEFINE_ZYNQ_PINCTRL_GRP(qspi_cs1), DEFINE_ZYNQ_PINCTRL_GRP(spi0_0), + DEFINE_ZYNQ_PINCTRL_GRP(spi0_0_ss0), + DEFINE_ZYNQ_PINCTRL_GRP(spi0_0_ss1), + DEFINE_ZYNQ_PINCTRL_GRP(spi0_0_ss2), DEFINE_ZYNQ_PINCTRL_GRP(spi0_1), + DEFINE_ZYNQ_PINCTRL_GRP(spi0_1_ss0), + DEFINE_ZYNQ_PINCTRL_GRP(spi0_1_ss1), + DEFINE_ZYNQ_PINCTRL_GRP(spi0_1_ss2), DEFINE_ZYNQ_PINCTRL_GRP(spi0_2), + DEFINE_ZYNQ_PINCTRL_GRP(spi0_2_ss0), + DEFINE_ZYNQ_PINCTRL_GRP(spi0_2_ss1), + DEFINE_ZYNQ_PINCTRL_GRP(spi0_2_ss2), DEFINE_ZYNQ_PINCTRL_GRP(spi1_0), + DEFINE_ZYNQ_PINCTRL_GRP(spi1_0_ss0), + DEFINE_ZYNQ_PINCTRL_GRP(spi1_0_ss1), + DEFINE_ZYNQ_PINCTRL_GRP(spi1_0_ss2), DEFINE_ZYNQ_PINCTRL_GRP(spi1_1), + DEFINE_ZYNQ_PINCTRL_GRP(spi1_1_ss0), + DEFINE_ZYNQ_PINCTRL_GRP(spi1_1_ss1), + DEFINE_ZYNQ_PINCTRL_GRP(spi1_1_ss2), DEFINE_ZYNQ_PINCTRL_GRP(spi1_2), + DEFINE_ZYNQ_PINCTRL_GRP(spi1_2_ss0), + DEFINE_ZYNQ_PINCTRL_GRP(spi1_2_ss1), + DEFINE_ZYNQ_PINCTRL_GRP(spi1_2_ss2), DEFINE_ZYNQ_PINCTRL_GRP(spi1_3), + DEFINE_ZYNQ_PINCTRL_GRP(spi1_3_ss0), + DEFINE_ZYNQ_PINCTRL_GRP(spi1_3_ss1), + DEFINE_ZYNQ_PINCTRL_GRP(spi1_3_ss2), DEFINE_ZYNQ_PINCTRL_GRP(sdio0_0), DEFINE_ZYNQ_PINCTRL_GRP(sdio0_1), DEFINE_ZYNQ_PINCTRL_GRP(sdio0_2), @@ -552,6 +597,15 @@ static const char * const spi0_groups[] = {"spi0_0_grp", "spi0_1_grp", "spi0_2_grp"}; static const char * const spi1_groups[] = {"spi1_0_grp", "spi1_1_grp", "spi1_2_grp", "spi1_3_grp"}; +static const char * const spi0_ss_groups[] = {"spi0_0_ss0_grp", + "spi0_0_ss1_grp", "spi0_0_ss2_grp", "spi0_1_ss0_grp", + "spi0_1_ss1_grp", "spi0_1_ss2_grp", "spi0_2_ss0_grp", + "spi0_2_ss1_grp", "spi0_2_ss2_grp"}; +static const char * const spi1_ss_groups[] = {"spi1_0_ss0_grp", + "spi1_0_ss1_grp", "spi1_0_ss2_grp", "spi1_1_ss0_grp", + "spi1_1_ss1_grp", "spi1_1_ss2_grp", "spi1_2_ss0_grp", + "spi1_2_ss1_grp", "spi1_2_ss2_grp", "spi1_3_ss0_grp", + "spi1_3_ss1_grp", "spi1_3_ss2_grp"}; static const char * const sdio0_groups[] = {"sdio0_0_grp", "sdio0_1_grp", "sdio0_2_grp"}; static const char * const sdio1_groups[] = {"sdio1_0_grp", "sdio1_1_grp", @@ -742,6 +796,8 @@ static const struct zynq_pinmux_function zynq_pmux_functions[] = { DEFINE_ZYNQ_PINMUX_FUNCTION(qspi_cs1, 1), DEFINE_ZYNQ_PINMUX_FUNCTION(spi0, 0x50), DEFINE_ZYNQ_PINMUX_FUNCTION(spi1, 0x50), + DEFINE_ZYNQ_PINMUX_FUNCTION(spi0_ss, 0x50), + DEFINE_ZYNQ_PINMUX_FUNCTION(spi1_ss, 0x50), DEFINE_ZYNQ_PINMUX_FUNCTION(sdio0, 0x40), DEFINE_ZYNQ_PINMUX_FUNCTION(sdio0_pc, 0xc), DEFINE_ZYNQ_PINMUX_FUNCTION_MUX(sdio0_wp, 0, 130, ZYNQ_SDIO_WP_MASK, -- 2.20.1