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tty: serial: amba-pl011: Remove QDF2xxx workarounds 

This SoC family was destined for server use, featuring Qualcomm's very
interesting Kryo cores (before "Kryo" became a marketing term for Arm
cores with small modifications). It did however not leave the labs of
Qualcomm and presumably some partners, nor was it ever productized.

Remove the workarounds, as they are long obsolete.

Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Link: https://lore.kernel.org/r/20240122-topic-qdf_cleanup_tty-v1-1-0415503184be@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Konrad Dybcio 2024-01-22 15:27:20 +01:00 committed by Greg Kroah-Hartman
parent 09aec324b6
commit 196f34af2b
1 changed files with 0 additions and 82 deletions
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82
drivers/tty/serial/amba-pl011.c
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@ -152,23 +152,6 @@ static const struct vendor_data vendor_sbsa = {
.fixed_options = true,
};
#ifdef CONFIG_ACPI_SPCR_TABLE
static const struct vendor_data vendor_qdt_qdf2400_e44 = {
.reg_offset = pl011_std_offsets,
.fr_busy = UART011_FR_TXFE,
.fr_dsr = UART01x_FR_DSR,
.fr_cts = UART01x_FR_CTS,
.fr_ri = UART011_FR_RI,
.inv_fr = UART011_FR_TXFE,
.access_32b = true,
.oversampling = false,
.dma_threshold = false,
.cts_event_workaround = false,
.always_enabled = true,
.fixed_options = true,
};
#endif
static u16 pl011_st_offsets[REG_ARRAY_SIZE] = {
[REG_DR] = UART01x_DR,
[REG_ST_DMAWM] = ST_UART011_DMAWM,
@ -2468,15 +2451,6 @@ static int pl011_console_match(struct console *co, char *name, int idx,
resource_size_t addr;
int i;
/*
* Systems affected by the Qualcomm Technologies QDF2400 E44 erratum
* have a distinct console name, so make sure we check for that.
* The actual implementation of the erratum occurs in the probe
* function.
*/
if ((strcmp(name, "qdf2400_e44") != 0) && (strcmp(name, "pl011") != 0))
return -ENODEV;
if (uart_parse_earlycon(options, &iotype, &addr, &options))
return -ENODEV;
@ -2517,22 +2491,6 @@ static struct console amba_console = {
#define AMBA_CONSOLE (&amba_console)
static void qdf2400_e44_putc(struct uart_port *port, unsigned char c)
{
while (readl(port->membase + UART01x_FR) & UART01x_FR_TXFF)
cpu_relax();
writel(c, port->membase + UART01x_DR);
while (!(readl(port->membase + UART01x_FR) & UART011_FR_TXFE))
cpu_relax();
}
static void qdf2400_e44_early_write(struct console *con, const char *s, unsigned int n)
{
struct earlycon_device *dev = con->data;
uart_console_write(&dev->port, s, n, qdf2400_e44_putc);
}
static void pl011_putc(struct uart_port *port, unsigned char c)
{
while (readl(port->membase + UART01x_FR) & UART01x_FR_TXFF)
@ -2611,29 +2569,6 @@ OF_EARLYCON_DECLARE(pl011, "arm,pl011", pl011_early_console_setup);
OF_EARLYCON_DECLARE(pl011, "arm,sbsa-uart", pl011_early_console_setup);
/*
* On Qualcomm Datacenter Technologies QDF2400 SOCs affected by
* Erratum 44, traditional earlycon can be enabled by specifying
* "earlycon=qdf2400_e44,<address>". Any options are ignored.
*
* Alternatively, you can just specify "earlycon", and the early console
* will be enabled with the information from the SPCR table. In this
* case, the SPCR code will detect the need for the E44 work-around,
* and set the console name to "qdf2400_e44".
*/
static int __init
qdf2400_e44_early_console_setup(struct earlycon_device *device,
const char *opt)
{
if (!device->port.membase)
return -ENODEV;
device->con->write = qdf2400_e44_early_write;
return 0;
}
EARLYCON_DECLARE(qdf2400_e44, qdf2400_e44_early_console_setup);
#else
#define AMBA_CONSOLE NULL
#endif
@ -2869,22 +2804,6 @@ static int pl011_resume(struct device *dev)
static SIMPLE_DEV_PM_OPS(pl011_dev_pm_ops, pl011_suspend, pl011_resume);
#ifdef CONFIG_ACPI_SPCR_TABLE
static void qpdf2400_erratum44_workaround(struct device *dev,
struct uart_amba_port *uap)
{
if (!qdf2400_e44_present)
return;
dev_info(dev, "working around QDF2400 SoC erratum 44\n");
uap->vendor = &vendor_qdt_qdf2400_e44;
}
#else
static void qpdf2400_erratum44_workaround(struct device *dev,
struct uart_amba_port *uap)
{ /* empty */ }
#endif
static int sbsa_uart_probe(struct platform_device *pdev)
{
struct uart_amba_port *uap;
@ -2921,7 +2840,6 @@ static int sbsa_uart_probe(struct platform_device *pdev)
uap->port.irq = ret;
uap->vendor = &vendor_sbsa;
qpdf2400_erratum44_workaround(&pdev->dev, uap);
uap->reg_offset = uap->vendor->reg_offset;
uap->fifosize = 32;