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Diffstat (limited to 'drivers/mmc')
-rw-r--r--drivers/mmc/card/sdio_uart.c62
-rw-r--r--drivers/mmc/core/core.c100
2 files changed, 130 insertions, 32 deletions
diff --git a/drivers/mmc/card/sdio_uart.c b/drivers/mmc/card/sdio_uart.c
index 78ad48718ab..36a8d53ad2a 100644
--- a/drivers/mmc/card/sdio_uart.c
+++ b/drivers/mmc/card/sdio_uart.c
@@ -30,6 +30,7 @@
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/mutex.h>
+#include <linux/seq_file.h>
#include <linux/serial_reg.h>
#include <linux/circ_buf.h>
#include <linux/gfp.h>
@@ -933,67 +934,64 @@ static int sdio_uart_tiocmset(struct tty_struct *tty, struct file *file,
return result;
}
-static int sdio_uart_read_proc(char *page, char **start, off_t off,
- int count, int *eof, void *data)
+static int sdio_uart_proc_show(struct seq_file *m, void *v)
{
- int i, len = 0;
- off_t begin = 0;
+ int i;
- len += sprintf(page, "serinfo:1.0 driver%s%s revision:%s\n",
+ seq_printf(m, "serinfo:1.0 driver%s%s revision:%s\n",
"", "", "");
- for (i = 0; i < UART_NR && len < PAGE_SIZE - 96; i++) {
+ for (i = 0; i < UART_NR; i++) {
struct sdio_uart_port *port = sdio_uart_port_get(i);
if (port) {
- len += sprintf(page+len, "%d: uart:SDIO", i);
+ seq_printf(m, "%d: uart:SDIO", i);
if(capable(CAP_SYS_ADMIN)) {
- len += sprintf(page + len, " tx:%d rx:%d",
+ seq_printf(m, " tx:%d rx:%d",
port->icount.tx, port->icount.rx);
if (port->icount.frame)
- len += sprintf(page + len, " fe:%d",
+ seq_printf(m, " fe:%d",
port->icount.frame);
if (port->icount.parity)
- len += sprintf(page + len, " pe:%d",
+ seq_printf(m, " pe:%d",
port->icount.parity);
if (port->icount.brk)
- len += sprintf(page + len, " brk:%d",
+ seq_printf(m, " brk:%d",
port->icount.brk);
if (port->icount.overrun)
- len += sprintf(page + len, " oe:%d",
+ seq_printf(m, " oe:%d",
port->icount.overrun);
if (port->icount.cts)
- len += sprintf(page + len, " cts:%d",
+ seq_printf(m, " cts:%d",
port->icount.cts);
if (port->icount.dsr)
- len += sprintf(page + len, " dsr:%d",
+ seq_printf(m, " dsr:%d",
port->icount.dsr);
if (port->icount.rng)
- len += sprintf(page + len, " rng:%d",
+ seq_printf(m, " rng:%d",
port->icount.rng);
if (port->icount.dcd)
- len += sprintf(page + len, " dcd:%d",
+ seq_printf(m, " dcd:%d",
port->icount.dcd);
}
- strcat(page, "\n");
- len++;
sdio_uart_port_put(port);
- }
-
- if (len + begin > off + count)
- goto done;
- if (len + begin < off) {
- begin += len;
- len = 0;
+ seq_putc(m, '\n');
}
}
- *eof = 1;
+ return 0;
+}
-done:
- if (off >= len + begin)
- return 0;
- *start = page + (off - begin);
- return (count < begin + len - off) ? count : (begin + len - off);
+static int sdio_uart_proc_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, sdio_uart_proc_show, NULL);
}
+static const struct file_operations sdio_uart_proc_fops = {
+ .owner = THIS_MODULE,
+ .open = sdio_uart_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
static const struct tty_operations sdio_uart_ops = {
.open = sdio_uart_open,
.close = sdio_uart_close,
@@ -1007,7 +1005,7 @@ static const struct tty_operations sdio_uart_ops = {
.break_ctl = sdio_uart_break_ctl,
.tiocmget = sdio_uart_tiocmget,
.tiocmset = sdio_uart_tiocmset,
- .read_proc = sdio_uart_read_proc,
+ .proc_fops = &sdio_uart_proc_fops,
};
static struct tty_driver *sdio_uart_tty_driver;
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index df6ce4a06cf..1445ea8f10a 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -21,6 +21,7 @@
#include <linux/leds.h>
#include <linux/scatterlist.h>
#include <linux/log2.h>
+#include <linux/regulator/consumer.h>
#include <linux/mmc/card.h>
#include <linux/mmc/host.h>
@@ -523,6 +524,105 @@ u32 mmc_vddrange_to_ocrmask(int vdd_min, int vdd_max)
}
EXPORT_SYMBOL(mmc_vddrange_to_ocrmask);
+#ifdef CONFIG_REGULATOR
+
+/**
+ * mmc_regulator_get_ocrmask - return mask of supported voltages
+ * @supply: regulator to use
+ *
+ * This returns either a negative errno, or a mask of voltages that
+ * can be provided to MMC/SD/SDIO devices using the specified voltage
+ * regulator. This would normally be called before registering the
+ * MMC host adapter.
+ */
+int mmc_regulator_get_ocrmask(struct regulator *supply)
+{
+ int result = 0;
+ int count;
+ int i;
+
+ count = regulator_count_voltages(supply);
+ if (count < 0)
+ return count;
+
+ for (i = 0; i < count; i++) {
+ int vdd_uV;
+ int vdd_mV;
+
+ vdd_uV = regulator_list_voltage(supply, i);
+ if (vdd_uV <= 0)
+ continue;
+
+ vdd_mV = vdd_uV / 1000;
+ result |= mmc_vddrange_to_ocrmask(vdd_mV, vdd_mV);
+ }
+
+ return result;
+}
+EXPORT_SYMBOL(mmc_regulator_get_ocrmask);
+
+/**
+ * mmc_regulator_set_ocr - set regulator to match host->ios voltage
+ * @vdd_bit: zero for power off, else a bit number (host->ios.vdd)
+ * @supply: regulator to use
+ *
+ * Returns zero on success, else negative errno.
+ *
+ * MMC host drivers may use this to enable or disable a regulator using
+ * a particular supply voltage. This would normally be called from the
+ * set_ios() method.
+ */
+int mmc_regulator_set_ocr(struct regulator *supply, unsigned short vdd_bit)
+{
+ int result = 0;
+ int min_uV, max_uV;
+ int enabled;
+
+ enabled = regulator_is_enabled(supply);
+ if (enabled < 0)
+ return enabled;
+
+ if (vdd_bit) {
+ int tmp;
+ int voltage;
+
+ /* REVISIT mmc_vddrange_to_ocrmask() may have set some
+ * bits this regulator doesn't quite support ... don't
+ * be too picky, most cards and regulators are OK with
+ * a 0.1V range goof (it's a small error percentage).
+ */
+ tmp = vdd_bit - ilog2(MMC_VDD_165_195);
+ if (tmp == 0) {
+ min_uV = 1650 * 1000;
+ max_uV = 1950 * 1000;
+ } else {
+ min_uV = 1900 * 1000 + tmp * 100 * 1000;
+ max_uV = min_uV + 100 * 1000;
+ }
+
+ /* avoid needless changes to this voltage; the regulator
+ * might not allow this operation
+ */
+ voltage = regulator_get_voltage(supply);
+ if (voltage < 0)
+ result = voltage;
+ else if (voltage < min_uV || voltage > max_uV)
+ result = regulator_set_voltage(supply, min_uV, max_uV);
+ else
+ result = 0;
+
+ if (result == 0 && !enabled)
+ result = regulator_enable(supply);
+ } else if (enabled) {
+ result = regulator_disable(supply);
+ }
+
+ return result;
+}
+EXPORT_SYMBOL(mmc_regulator_set_ocr);
+
+#endif
+
/*
* Mask off any voltages we don't support and select
* the lowest voltage
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-27 13:15:58 +0000