This patch adds MIPI CSI/DSIB pad control mux register
from the APB misc block to tegra pinctrl.
Without writing to this register, the dsib pads are
muxed as csi, and cannot be used.
The register is not yet documented in the TRM, here is
the description:
70000820: APB_MISC_GP_MIPI_PAD_CTRL_0
[31:02] RESERVED
[01:01] DSIB_MODE [CSI=0,DSIB=1]
[00:00] RESERVED
Signed-off-by: Sean Paul <seanpaul@xxxxxxxxxxxx>
---
Changes in v2:
- Added devicetree binding documentation
- Added discrete pins for all pads, grouped in apb_dsi_b group
- Changed group naming to be consistent with the other groups
- Fixed compilation errors
- Fixed indentation in tegra124_groups
.../bindings/pinctrl/nvidia,tegra124-pinmux.txt | 13 ++++-
drivers/pinctrl/pinctrl-tegra124.c | 67 ++++++++++++++++++++++
2 files changed, 77 insertions(+), 3 deletions(-)
diff --git a/Documentation/devicetree/bindings/pinctrl/nvidia,tegra124-pinmux.txt b/Documentation/devicetree/bindings/pinctrl/nvidia,tegra124-pinmux.txt
index 6464bf7..5823feb 100644
--- a/Documentation/devicetree/bindings/pinctrl/nvidia,tegra124-pinmux.txt
+++ b/Documentation/devicetree/bindings/pinctrl/nvidia,tegra124-pinmux.txt
@@ -91,6 +91,12 @@ Valid values for pin and group names are:
dbg, sdio3, spi, uaa, uab, uart2, uart3, sdio1, ddc, gma, gme, gmf, gmg,
gmh, owr, uda, gpv, dev3, cec, usb_vbus_en, ao3, ao0, hv0, sdio4, ao4.
+ apb groups:
+
+ These do not support any of the optional properties.
+
+ dsi_b
+
Valid values for nvidia,functions are:
blink, cec, cldvfs, clk12, cpu, dap, dap1, dap2, dev3, displaya,
@@ -101,14 +107,15 @@ Valid values for nvidia,functions are:
sdmmc4, soc, spdif, spi1, spi2, spi3, spi4, spi5, spi6, trace, uarta,
uartb, uartc, uartd, ulpi, usb, vgp1, vgp2, vgp3, vgp4, vgp5, vgp6,
vi, vi_alt1, vi_alt3, vimclk2, vimclk2_alt, sata, ccla, pe0, pe, pe1,
- dp, rtck, sys, clk tmds.
+ dp, rtck, sys, clk tmds. csi, dsi_b
Example:
pinmux: pinmux {
compatible = "nvidia,tegra124-pinmux";
- reg = <0x70000868 0x164 /* Pad control registers */
- 0x70003000 0x434>; /* PinMux registers */
+ reg = <0x0 0x70000868 0x0 0x164>, /* Pad control registers */
+ <0x0 0x70003000 0x0 0x434>, /* Mux registers */
+ <0x0 0x70000820 0x0 0x8>; /* APB misc registers */
};
Example pinmux entries:
diff --git a/drivers/pinctrl/pinctrl-tegra124.c b/drivers/pinctrl/pinctrl-tegra124.c
index e80797e..7137a0a 100644
--- a/drivers/pinctrl/pinctrl-tegra124.c
+++ b/drivers/pinctrl/pinctrl-tegra124.c
@@ -224,6 +224,16 @@
#define TEGRA_PIN_OWR _PIN(5)
#define TEGRA_PIN_CLK_32K_IN _PIN(6)
#define TEGRA_PIN_JTAG_RTCK _PIN(7)
+#define TEGRA_PIN_DSI_B_CLK_P _PIN(8)
+#define TEGRA_PIN_DSI_B_CLK_N _PIN(9)
+#define TEGRA_PIN_DSI_B_D0_P _PIN(10)
+#define TEGRA_PIN_DSI_B_D0_N _PIN(11)
+#define TEGRA_PIN_DSI_B_D1_P _PIN(12)
+#define TEGRA_PIN_DSI_B_D1_N _PIN(13)
+#define TEGRA_PIN_DSI_B_D2_P _PIN(14)
+#define TEGRA_PIN_DSI_B_D2_N _PIN(15)
+#define TEGRA_PIN_DSI_B_D3_P _PIN(16)
+#define TEGRA_PIN_DSI_B_D3_N _PIN(17)
static const struct pinctrl_pin_desc tegra124_pins[] = {
PINCTRL_PIN(TEGRA_PIN_CLK_32K_OUT_PA0, "CLK_32K_OUT PA0"),
@@ -417,6 +427,16 @@ static const struct pinctrl_pin_desc tegra124_pins[] = {
PINCTRL_PIN(TEGRA_PIN_OWR, "OWR"),
PINCTRL_PIN(TEGRA_PIN_CLK_32K_IN, "CLK_32K_IN"),
PINCTRL_PIN(TEGRA_PIN_JTAG_RTCK, "JTAG_RTCK"),
+ PINCTRL_PIN(TEGRA_PIN_DSI_B_CLK_P, "DSI_B_CLK_P"),
+ PINCTRL_PIN(TEGRA_PIN_DSI_B_CLK_N, "DSI_B_CLK_N"),
+ PINCTRL_PIN(TEGRA_PIN_DSI_B_D0_P, "DSI_B_D0_P"),
+ PINCTRL_PIN(TEGRA_PIN_DSI_B_D0_N, "DSI_B_D0_N"),
+ PINCTRL_PIN(TEGRA_PIN_DSI_B_D1_P, "DSI_B_D1_P"),
+ PINCTRL_PIN(TEGRA_PIN_DSI_B_D1_N, "DSI_B_D1_N"),
+ PINCTRL_PIN(TEGRA_PIN_DSI_B_D2_P, "DSI_B_D2_P"),
+ PINCTRL_PIN(TEGRA_PIN_DSI_B_D2_N, "DSI_B_D2_N"),
+ PINCTRL_PIN(TEGRA_PIN_DSI_B_D3_P, "DSI_B_D3_P"),
+ PINCTRL_PIN(TEGRA_PIN_DSI_B_D3_N, "DSI_B_D3_N"),
};
static const unsigned clk_32k_out_pa0_pins[] = {
@@ -1495,6 +1515,19 @@ static const unsigned drive_ao4_pins[] = {
TEGRA_PIN_JTAG_RTCK,
};
+static const unsigned apb_dsi_b_pins[] = {
+ TEGRA_PIN_DSI_B_CLK_P,
+ TEGRA_PIN_DSI_B_CLK_N,
+ TEGRA_PIN_DSI_B_D0_P,
+ TEGRA_PIN_DSI_B_D0_N,
+ TEGRA_PIN_DSI_B_D1_P,
+ TEGRA_PIN_DSI_B_D1_N,
+ TEGRA_PIN_DSI_B_D2_P,
+ TEGRA_PIN_DSI_B_D2_N,
+ TEGRA_PIN_DSI_B_D3_P,
+ TEGRA_PIN_DSI_B_D3_N,
+};
+
enum tegra_mux {
TEGRA_MUX_BLINK,
TEGRA_MUX_CCLA,
@@ -1580,6 +1613,8 @@ enum tegra_mux {
TEGRA_MUX_VI_ALT3,
TEGRA_MUX_VIMCLK2,
TEGRA_MUX_VIMCLK2_ALT,
+ TEGRA_MUX_CSI,
+ TEGRA_MUX_DSI_B,
};
#define FUNCTION(fname) \
@@ -1672,10 +1707,13 @@ static struct tegra_function tegra124_functions[] = {
FUNCTION(vi_alt3),
FUNCTION(vimclk2),
FUNCTION(vimclk2_alt),
+ FUNCTION(csi),
+ FUNCTION(dsi_b),
};
#define DRV_PINGROUP_REG_A 0x868 /* bank 0 */
#define PINGROUP_REG_A 0x3000 /* bank 1 */
+#define APB_MISC_PINGROUP_REG_A 0x820 /* bank 2 */
#define PINGROUP_REG(r) ((r) - PINGROUP_REG_A)
@@ -1744,6 +1782,32 @@ static struct tegra_function tegra124_functions[] = {
.drvtype_bit = PINGROUP_BIT_##drvtype(6), \
}
+#define APB_MISC_PINGROUP_REG_Y(r) ((r) - APB_MISC_PINGROUP_REG_A)
+
+#define APB_MISC_PINGROUP(pg_name, r, b, f0, f1) \
+ { \
+ .name = "apb_" #pg_name, \
+ .pins = apb_##pg_name##_pins, \
+ .npins = ARRAY_SIZE(apb_##pg_name##_pins), \
+ .funcs = { \
+ TEGRA_MUX_ ## f0, \
+ TEGRA_MUX_ ## f1, \
+ TEGRA_MUX_RSVD3, \
+ TEGRA_MUX_RSVD4, \
+ }, \
+ .mux_reg = APB_MISC_PINGROUP_REG_Y(r), \
+ .mux_bank = 2, \
+ .mux_bit = b, \
+ .pupd_reg = -1, \
+ .tri_reg = -1, \
+ .einput_bit = -1, \
+ .odrain_bit = -1, \
+ .lock_bit = -1, \
+ .ioreset_bit = -1, \
+ .rcv_sel_bit = -1, \
+ .drv_reg = -1, \
+ }
+
static const struct tegra_pingroup tegra124_groups[] = {
/* pg_name, f0, f1, f2, f3, r, od, ior, rcv_sel */
PINGROUP(ulpi_data0_po1, SPI3, HSI, UARTA, ULPI, 0x3000, N, N, N),
@@ -1979,6 +2043,9 @@ static const struct tegra_pingroup tegra124_groups[] = {
DRV_PINGROUP(hv0, 0x9b4, 2, 3, 4, 12, 5, -1, -1, 28, 2, -1, -1, N),
DRV_PINGROUP(sdio4, 0x9c4, 2, 3, 4, 12, 5, 20, 5, 28, 2, 30, 2, N),
DRV_PINGROUP(ao4, 0x9c8, 2, 3, 4, 12, 7, 20, 7, 28, 2, 30, 2, Y),
+
+ /* pg_name, r b f0, f1 */
+ APB_MISC_PINGROUP(dsi_b, 0x820, 1, CSI, DSI_B)
};
static const struct tegra_pinctrl_soc_data tegra124_pinctrl = {
--
2.0.0
--
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