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path: root/drivers/pinctrl/sh-pfc/pfc-r8a7790.c
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Diffstat (limited to 'drivers/pinctrl/sh-pfc/pfc-r8a7790.c')
-rw-r--r--drivers/pinctrl/sh-pfc/pfc-r8a7790.c54
1 files changed, 53 insertions, 1 deletions
diff --git a/drivers/pinctrl/sh-pfc/pfc-r8a7790.c b/drivers/pinctrl/sh-pfc/pfc-r8a7790.c
index 0f4d48f..eed8daa 100644
--- a/drivers/pinctrl/sh-pfc/pfc-r8a7790.c
+++ b/drivers/pinctrl/sh-pfc/pfc-r8a7790.c
@@ -21,16 +21,21 @@
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
+#include <linux/io.h>
#include <linux/kernel.h>
#include "core.h"
#include "sh_pfc.h"
+/*
+ * All pins assigned to GPIO bank 3 can be used for SD interfaces in
+ * which case they support both 3.3V and 1.8V signalling.
+ */
#define CPU_ALL_PORT(fn, sfx) \
PORT_GP_32(0, fn, sfx), \
PORT_GP_30(1, fn, sfx), \
PORT_GP_30(2, fn, sfx), \
- PORT_GP_32(3, fn, sfx), \
+ PORT_GP_CFG_32(3, fn, sfx, SH_PFC_PIN_CFG_IO_VOLTAGE), \
PORT_GP_32(4, fn, sfx), \
PORT_GP_32(5, fn, sfx)
@@ -4691,6 +4696,47 @@ static const char * const vin3_groups[] = {
"vin3_clk",
};
+#define IOCTRL6 0x8c
+
+static int r8a7790_get_io_voltage(struct sh_pfc *pfc, unsigned int pin)
+{
+ u32 data, mask;
+
+ if (WARN(pin < RCAR_GP_PIN(3, 0) || pin > RCAR_GP_PIN(3, 31), "invalid pin %#x", pin))
+ return -EINVAL;
+
+ data = ioread32(pfc->windows->virt + IOCTRL6),
+ /* Bits in IOCTRL6 are numbered in opposite order to pins */
+ mask = 0x80000000 >> (pin & 0x1f);
+
+ return (data & mask) ? 3300 : 1800;
+}
+
+static int r8a7790_set_io_voltage(struct sh_pfc *pfc, unsigned int pin, u16 mV)
+{
+ u32 data, mask;
+
+ if (WARN(pin < RCAR_GP_PIN(3, 0) || pin > RCAR_GP_PIN(3, 31), "invalid pin %#x", pin))
+ return -EINVAL;
+
+ if (mV != 1800 && mV != 3300)
+ return -EINVAL;
+
+ data = ioread32(pfc->windows->virt + IOCTRL6);
+ /* Bits in IOCTRL6 are numbered in opposite order to pins */
+ mask = 0x80000000 >> (pin & 0x1f);
+
+ if (mV == 3300)
+ data |= mask;
+ else
+ data &= ~mask;
+
+ iowrite32(~data, pfc->windows->virt); /* unlock reg */
+ iowrite32(data, pfc->windows->virt + IOCTRL6);
+
+ return 0;
+}
+
static const struct sh_pfc_function pinmux_functions[] = {
SH_PFC_FUNCTION(audio_clk),
SH_PFC_FUNCTION(avb),
@@ -5690,8 +5736,14 @@ static const struct pinmux_cfg_reg pinmux_config_regs[] = {
{ },
};
+static const struct sh_pfc_soc_operations pinmux_ops = {
+ .get_io_voltage = r8a7790_get_io_voltage,
+ .set_io_voltage = r8a7790_set_io_voltage,
+};
+
const struct sh_pfc_soc_info r8a7790_pinmux_info = {
.name = "r8a77900_pfc",
+ .ops = &pinmux_ops,
.unlock_reg = 0xe6060000, /* PMMR */
.function = { PINMUX_FUNCTION_BEGIN, PINMUX_FUNCTION_END },