diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.19/950-0549-pinctrl-bcm2835-Add-support-for-BCM2838.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.19/950-0549-pinctrl-bcm2835-Add-support-for-BCM2838.patch | 90 |
1 files changed, 0 insertions, 90 deletions
diff --git a/target/linux/brcm2708/patches-4.19/950-0549-pinctrl-bcm2835-Add-support-for-BCM2838.patch b/target/linux/brcm2708/patches-4.19/950-0549-pinctrl-bcm2835-Add-support-for-BCM2838.patch deleted file mode 100644 index 655937e303..0000000000 --- a/target/linux/brcm2708/patches-4.19/950-0549-pinctrl-bcm2835-Add-support-for-BCM2838.patch +++ /dev/null @@ -1,90 +0,0 @@ -From 9fdab9bd6324314cbdfe96a6da5edef6c29ed5e6 Mon Sep 17 00:00:00 2001 -From: Tim Gover <tim.gover@raspberrypi.org> -Date: Wed, 9 Jan 2019 14:43:36 +0000 -Subject: [PATCH 549/806] pinctrl-bcm2835: Add support for BCM2838 - -GPIO configuration on BCM2838 is largely the same as BCM2835 except for -the pull up/down configuration. The old mechanism has been replaced -by new registers which don't require the fixed delay. - -Detect BCN2838 at run-time and use the new mechanism. Backwards -compatibility for the device-tree configuration has been retained. ---- - drivers/pinctrl/bcm/pinctrl-bcm2835.c | 58 ++++++++++++++++++++------- - 1 file changed, 44 insertions(+), 14 deletions(-) - ---- a/drivers/pinctrl/bcm/pinctrl-bcm2835.c -+++ b/drivers/pinctrl/bcm/pinctrl-bcm2835.c -@@ -67,6 +67,12 @@ - #define GPPUD 0x94 /* Pin Pull-up/down Enable */ - #define GPPUDCLK0 0x98 /* Pin Pull-up/down Enable Clock */ - -+/* 2711 has a different mechanism for pin pull-up/down/enable */ -+#define GPPUPPDN0 0xe4 /* Pin pull-up/down for pins 15:0 */ -+#define GPPUPPDN1 0xe8 /* Pin pull-up/down for pins 31:16 */ -+#define GPPUPPDN2 0xec /* Pin pull-up/down for pins 47:32 */ -+#define GPPUPPDN3 0xf0 /* Pin pull-up/down for pins 57:48 */ -+ - #define FSEL_REG(p) (GPFSEL0 + (((p) / 10) * 4)) - #define FSEL_SHIFT(p) (((p) % 10) * 3) - #define GPIO_REG_OFFSET(p) ((p) / 32) -@@ -915,21 +921,45 @@ static void bcm2835_pull_config_set(stru - unsigned int pin, unsigned int arg) - { - u32 off, bit; -+ /* BCM2835, BCM2836 & BCM2837 return 'gpio' for this unused register */ -+ int is_2835 = bcm2835_gpio_rd(pc, GPPUPPDN3) == 0x6770696f; - -- off = GPIO_REG_OFFSET(pin); -- bit = GPIO_REG_SHIFT(pin); -- -- bcm2835_gpio_wr(pc, GPPUD, arg & 3); -- /* -- * BCM2835 datasheet say to wait 150 cycles, but not of what. -- * But the VideoCore firmware delay for this operation -- * based nearly on the same amount of VPU cycles and this clock -- * runs at 250 MHz. -- */ -- udelay(1); -- bcm2835_gpio_wr(pc, GPPUDCLK0 + (off * 4), BIT(bit)); -- udelay(1); -- bcm2835_gpio_wr(pc, GPPUDCLK0 + (off * 4), 0); -+ if (is_2835) { -+ off = GPIO_REG_OFFSET(pin); -+ bit = GPIO_REG_SHIFT(pin); -+ /* -+ * BCM2835 datasheet say to wait 150 cycles, but not of what. -+ * But the VideoCore firmware delay for this operation -+ * based nearly on the same amount of VPU cycles and this clock -+ * runs at 250 MHz. -+ */ -+ bcm2835_gpio_wr(pc, GPPUD, arg & 3); -+ udelay(1); -+ bcm2835_gpio_wr(pc, GPPUDCLK0 + (off * 4), BIT(bit)); -+ udelay(1); -+ bcm2835_gpio_wr(pc, GPPUDCLK0 + (off * 4), 0); -+ } else { -+ u32 reg; -+ int lsb; -+ -+ off = (pin >> 4); -+ if (off > 3) -+ return; -+ lsb = (pin & 0xf) << 1; -+ -+ /* The up/down semantics are reversed compared to BCM2835. -+ * Instead of updating all the device tree files, translate the -+ * values here. -+ */ -+ if (arg == 2) -+ arg = 1; -+ else if (arg == 1) -+ arg = 2; -+ reg = bcm2835_gpio_rd(pc, GPPUPPDN0 + (off *4)); -+ reg &= ~(0x3 << lsb); -+ reg |= (arg & 3) << lsb; -+ bcm2835_gpio_wr(pc, GPPUPPDN0 + (off * 4), reg); -+ } - } - - static int bcm2835_pinconf_set(struct pinctrl_dev *pctldev, |