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authorClaudiu Beznea <claudiu.beznea@microchip.com>2023-05-16 10:24:05 +0300
committerKrzysztof Kozlowski <krzysztof.kozlowski@linaro.org>2023-06-02 10:39:24 +0200
commitd3369a4b6f0164b8869a097547846ed4e5c9c47f (patch)
tree1439795f1daccc95017f63afb931e2e258fe2d23 /drivers
parent1d9e93fad549bc38f593147479ee063f2872c170 (diff)
memory: atmel-sdramc: remove the driver
Driver does only clock request + enable for DDR clocks. DDR clocks are enabled by bootloader and need to stay that way in Linux. To avoid having these clocks disabled by clock subsystem in case there are no Linux consumers for them the clocks were marked as critical in clock drivers (in commit 68b3b6f1773d ("clk: at91: mark ddr clocks as critical")). With this, there is no need to have a separate driver that only does clock request + enable. Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com> Link: https://lore.kernel.org/r/20230516072405.2696225-1-claudiu.beznea@microchip.com Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/memory/Kconfig11
-rw-r--r--drivers/memory/Makefile1
-rw-r--r--drivers/memory/atmel-sdramc.c74
3 files changed, 0 insertions, 86 deletions
diff --git a/drivers/memory/Kconfig b/drivers/memory/Kconfig
index 91774e6ee624..8efdd1f97139 100644
--- a/drivers/memory/Kconfig
+++ b/drivers/memory/Kconfig
@@ -30,17 +30,6 @@ config ARM_PL172_MPMC
If you have an embedded system with an AMBA bus and a PL172
controller, say Y or M here.
-config ATMEL_SDRAMC
- bool "Atmel (Multi-port DDR-)SDRAM Controller"
- default y if ARCH_AT91
- depends on ARCH_AT91 || COMPILE_TEST
- depends on OF
- help
- This driver is for Atmel SDRAM Controller or Atmel Multi-port
- DDR-SDRAM Controller available on Atmel AT91SAM9 and SAMA5 SoCs.
- Starting with the at91sam9g45, this controller supports SDR, DDR and
- LP-DDR memories.
-
config ATMEL_EBI
bool "Atmel EBI driver"
default y if ARCH_AT91
diff --git a/drivers/memory/Makefile b/drivers/memory/Makefile
index ae14ded464a8..d2e6ca9abbe0 100644
--- a/drivers/memory/Makefile
+++ b/drivers/memory/Makefile
@@ -8,7 +8,6 @@ ifeq ($(CONFIG_DDR),y)
obj-$(CONFIG_OF) += of_memory.o
endif
obj-$(CONFIG_ARM_PL172_MPMC) += pl172.o
-obj-$(CONFIG_ATMEL_SDRAMC) += atmel-sdramc.o
obj-$(CONFIG_ATMEL_EBI) += atmel-ebi.o
obj-$(CONFIG_BRCMSTB_DPFE) += brcmstb_dpfe.o
obj-$(CONFIG_BRCMSTB_MEMC) += brcmstb_memc.o
diff --git a/drivers/memory/atmel-sdramc.c b/drivers/memory/atmel-sdramc.c
deleted file mode 100644
index ea6e9e1eaf04..000000000000
--- a/drivers/memory/atmel-sdramc.c
+++ /dev/null
@@ -1,74 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Atmel (Multi-port DDR-)SDRAM Controller driver
- *
- * Author: Alexandre Belloni <alexandre.belloni@free-electrons.com>
- *
- * Copyright (C) 2014 Atmel
- */
-
-#include <linux/clk.h>
-#include <linux/err.h>
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/of_platform.h>
-#include <linux/platform_device.h>
-
-struct at91_ramc_caps {
- bool has_ddrck;
- bool has_mpddr_clk;
-};
-
-static const struct at91_ramc_caps at91rm9200_caps = { };
-
-static const struct at91_ramc_caps at91sam9g45_caps = {
- .has_ddrck = 1,
- .has_mpddr_clk = 0,
-};
-
-static const struct at91_ramc_caps sama5d3_caps = {
- .has_ddrck = 1,
- .has_mpddr_clk = 1,
-};
-
-static const struct of_device_id atmel_ramc_of_match[] = {
- { .compatible = "atmel,at91rm9200-sdramc", .data = &at91rm9200_caps, },
- { .compatible = "atmel,at91sam9260-sdramc", .data = &at91rm9200_caps, },
- { .compatible = "atmel,at91sam9g45-ddramc", .data = &at91sam9g45_caps, },
- { .compatible = "atmel,sama5d3-ddramc", .data = &sama5d3_caps, },
- {},
-};
-
-static int atmel_ramc_probe(struct platform_device *pdev)
-{
- const struct at91_ramc_caps *caps;
- struct clk *clk;
-
- caps = of_device_get_match_data(&pdev->dev);
-
- if (caps->has_ddrck) {
- clk = devm_clk_get_enabled(&pdev->dev, "ddrck");
- if (IS_ERR(clk))
- return PTR_ERR(clk);
- }
-
- if (caps->has_mpddr_clk) {
- clk = devm_clk_get_enabled(&pdev->dev, "mpddr");
- if (IS_ERR(clk)) {
- pr_err("AT91 RAMC: couldn't get mpddr clock\n");
- return PTR_ERR(clk);
- }
- }
-
- return 0;
-}
-
-static struct platform_driver atmel_ramc_driver = {
- .probe = atmel_ramc_probe,
- .driver = {
- .name = "atmel-ramc",
- .of_match_table = atmel_ramc_of_match,
- },
-};
-
-builtin_platform_driver(atmel_ramc_driver);